Front frame assembly and smart glasses

Abstract

The application discloses a front frame assembly and smart glasses, the front frame assembly has a near-eye side close to a human eye, and the front frame assembly comprises a spectacle frame, an optical waveguide lens and a color-changing sheet. The spectacle frame is provided with a first mounting part away from the near-eye side and a second mounting part close to the near-eye side at intervals. The optical waveguide lens comprises at least a substrate and an optical grating layer. The substrate has a side surface extending along a thickness direction. The side surface is arranged at intervals with an inner wall of the spectacle frame, so that the substrate can have a certain amount of expansion and contraction. The color-changing sheet is connected with the first mounting part. The optical waveguide lens is limited between the color-changing sheet and the second mounting part. Alternatively, the front frame assembly further comprises a limiting part. The limiting part is connected with the first mounting part. The color-changing sheet and the optical waveguide lens are limited between the limiting part and the second mounting part. According to the front frame assembly, the substrate can freely deform during reliability testing and restore the initial shape at room temperature, and light can propagate along a preset light path. Under the action of the color-changing sheet, the optical waveguide lens can be used in an environment with strong light.

Description

Technical Field

[0001] This utility model relates to the field of optical device technology, and in particular to front frame components and smart glasses. Background Technology

[0002] Smart glasses include head-mounted devices such as AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, and MR (Mixed Reality) glasses. These glasses have been applied in various fields, greatly facilitating people's lives and work, and enhancing their experience of how technology changes the world.

[0003] In related technologies, taking AR glasses as an example, to achieve lightweight AR glasses, the waveguide lenses in AR glasses are usually bonded to the outer frame with adhesive. During the bonding process, the substrate of the waveguide lens and the frame are typically bonded together with adhesive. However, during reliability testing, because the testing environment is usually high temperature and high humidity, the waveguide lens will deform to a certain extent at high temperatures. The substrate bonded to the frame is restricted in its free expansion and contraction during deformation, unable to achieve a free and adaptive thermal deformation process. The substrate also pulls on the adhesive attached to it, weakening the bond between the substrate and the frame and changing their relative position. When the reliability test ends and the glasses return to room temperature, the substrate cannot freely deform and return to its initial shape, resulting in a decrease in the display resolution of the waveguide lens.

[0004] In addition, optical waveguide lenses can both reflect and transmit light emitted by optomechanical components, as well as transmit ambient light. In strong ambient light, the display effect of optical waveguide lenses will be affected to a certain extent, and may also damage the user's eyes. Utility Model Content

[0005] In view of this, the present invention proposes a front frame assembly and smart glasses, which aims to enable the base of the front frame assembly to freely stretch and deform before and after reliability testing, and to enable the optical waveguide lens to display normally after the base returns to its initial surface shape, and to still display normally under certain ambient light conditions.

[0006] The first aspect of this utility model discloses a front frame assembly having a proximal side close to the human eye. The front frame assembly includes: a lens frame, on which a first mounting portion and a second mounting portion are spaced apart, the first mounting portion being disposed away from the proximal side and the second mounting portion being disposed close to the proximal side; an optical waveguide lens, the optical waveguide lens including at least a substrate and a grating layer, the substrate having a side surface extending along the thickness direction of the substrate, the side surface being spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction; and a photochromic lens, the photochromic lens being connected to the first mounting portion, and the optical waveguide lens being positioned between the photochromic lens and the second mounting portion; or, the front frame assembly further includes a limiting portion, the limiting portion being connected to the first mounting portion, and the photochromic lens and the optical waveguide lens being positioned between the limiting portion and the second mounting portion.

[0007] As can be seen from the above technical solutions, the front frame assembly proposed in the first aspect of this utility model connects the photochromic sheet to the first mounting part on the lens frame, and uses the photochromic sheet and the second mounting part to limit the optical waveguide lens; or, it connects the limiting part to the first mounting part, and uses the limiting part and the second mounting part to limit the optical waveguide lens. This ensures that the substrate and the lens frame do not adhere, and that all internal components of the optical waveguide lens remain tightly fitted. The substrate has a certain amount of free expansion and contraction due to thermal expansion and contraction, allowing it to deform freely in a high-temperature and high-humidity environment during reliability testing. After the reliability test is completed and the substrate returns to its original shape at room temperature, the signal light propagates along a preset optical path between the substrate and the grating layer, ensuring that the display effect of the optical waveguide lens is within a preset range. The photochromic sheet can change color under certain ambient light conditions, thereby blocking some ambient light and reducing interference when the optical waveguide lens is used under ambient light, thus increasing the application scenarios of the optical waveguide lens.

[0008] The second aspect of this utility model discloses a front frame assembly having a proximal side close to the human eye. The front frame assembly includes: a lens frame, on which a third mounting portion and a fourth mounting portion are spaced apart, the third mounting portion being arranged away from the proximal side and the fourth mounting portion being arranged close to the proximal side; a photochromic lens supported on the third mounting portion; and a waveguide lens including a substrate, a grating layer, and a cover plate, the cover plate being connected to the fourth mounting portion; the grating layer being connected between the cover plate and the substrate; a first surface of the substrate being bonded to the photochromic lens and / or having a first buffer pad; a second surface of the substrate being connected to the grating layer; and the substrate also having a side surface extending along the thickness direction of the substrate, the side surface being spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction.

[0009] As can be seen from the above technical solution, the front frame assembly proposed in the second aspect of this utility model has a cover plate connected to the fourth mounting part, and a photochromic sheet forming a support with the third mounting part. By using the cover plate and the photochromic sheet, the grating layer and the substrate are confined between the third and fourth mounting parts. Simultaneously, the substrate has a certain amount of free expansion and contraction due to thermal expansion and contraction. During reliability testing, the substrate can freely deform in a high-temperature and high-humidity environment, and return to its original shape at room temperature after the reliability test. This allows the signal light to propagate along a preset optical path between the substrate and the grating layer, ensuring that the display effect of the optical waveguide lens is within a preset range. The photochromic sheet can change color under certain ambient light conditions, thereby blocking some ambient light from passing through, reducing interference when the optical waveguide lens is used under ambient light, and increasing the application scenarios of the optical waveguide lens.

[0010] The third aspect of this utility model discloses a front frame assembly having a near-eye side facing the human eye. The front frame assembly includes: a lens frame with a first mounting portion; a photochromic lens connected to the first mounting portion and disposed on a side away from the near-eye side; and a waveguide lens disposed on the near-eye side. The waveguide lens includes a substrate and a grating layer. The substrate has a first surface facing the photochromic lens, a second surface away from the photochromic lens, and a side surface extending along the thickness direction of the substrate. The grating layer is connected to the first surface. The side surface and the second surface are spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction. The grating layer is bonded to the photochromic lens.

[0011] As can be seen from the above technical solution, the front frame assembly proposed in the third aspect of this utility model uses a photochromic sheet connected to the first mounting part, and a grating layer is disposed between the photochromic sheet and the substrate. One side of the grating layer is connected to the first surface of the substrate, and the other side of the grating layer is connected to the photochromic sheet. This ensures that the relative position between the optical waveguide lens and the photochromic sheet remains unchanged, thereby keeping the position of the optical waveguide lens relative to the frame constant. The second surface and side surface of the substrate are spaced apart from the inner wall of the frame, and there is no adhesion between the substrate and the frame. The substrate has a certain amount of free expansion and contraction due to thermal expansion and contraction. During reliability testing, the substrate can freely deform in a high-temperature and high-humidity environment, and return to its original shape when it returns to room temperature after the reliability test. This allows the signal light to propagate along a preset optical path during the propagation between the substrate and the grating layer, ensuring that the display effect of the optical waveguide lens is within a preset range. The photochromic sheet can change color under certain ambient light conditions, thereby blocking some ambient light from passing through, reducing interference when the optical waveguide lens is used under ambient light, and increasing the application scenarios of the optical waveguide lens.

[0012] The fourth aspect of this utility model discloses a front frame assembly having a near-eye side facing the human eye. The front frame assembly includes: a lens frame with a first mounting portion; a photochromic lens disposed on a side away from the near-eye side; and a waveguide lens disposed on the near-eye side. The waveguide lens includes a cover plate, a substrate, and a grating layer. The substrate has a first surface facing the photochromic lens, a second surface away from the photochromic lens, and a side surface extending along the thickness direction of the substrate. The side surface is spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction. The grating layer is connected to the second surface of the substrate and is bonded to the cover plate. The second surface of the substrate is bonded to the photochromic lens. The photochromic lens or the cover plate is connected to the first mounting portion.

[0013] As can be seen from the above technical solution, the front frame assembly proposed in the fourth aspect of this utility model connects to the first mounting part by using a photochromic sheet or cover plate. The grating layer is connected to the substrate and cover plate on both sides respectively, and the grating layer can be protected by the cover plate. The substrate and photochromic sheet are bonded together, thus maintaining the relative positions of the waveguide lens, photochromic sheet, and frame. The side of the substrate is spaced apart from the inner wall of the frame, and the substrate and frame are not bonded together. The substrate has a certain amount of free expansion and contraction due to thermal expansion and contraction, allowing it to deform freely in a high-temperature and high-humidity environment during reliability testing. After the reliability test is completed and the substrate returns to room temperature, it returns to its original shape. This ensures that the signal light propagates along a preset optical path between the substrate and the grating layer, guaranteeing that the display effect of the waveguide lens is within a preset range. The photochromic sheet can change color under certain ambient light conditions, thereby blocking some ambient light and reducing interference when the waveguide lens is used under ambient light, increasing the application scenarios of the waveguide lens.

[0014] The smart glasses proposed in the fifth aspect of this utility model include temples and a front frame assembly of the foregoing embodiments, wherein the temples are connected to the frame of the front frame assembly.

[0015] As can be seen from the above technical solutions, the smart glasses proposed in the fifth aspect of this utility model have temples connected to the frame, and the entire smart glasses can be easily worn on the ear through the temples; since the smart glasses have the front frame component of the aforementioned embodiment, they also have the beneficial effects brought by the aforementioned front frame component, which will not be elaborated here.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the disclosure of the embodiments of this utility model. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the front frame assembly proposed in some embodiments of the present invention, wherein the photochromic sheet is connected to the first mounting part, and the optical waveguide lens is limited between the second mounting part and the photochromic sheet; Figure 2 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the photochromic sheet is connected to the first mounting part, the second mounting part and the photochromic sheet limit the optical waveguide lens, and the grating layer and the photochromic sheet are bonded together on the whole surface; Figure 3 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the second mounting part and the color-changing sheet limit the optical waveguide lens, and a second water-proof and breathable pad is provided between the grating layer and the color-changing sheet; Figure 4 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the photochromic sheet is connected to the first mounting part, the second mounting part and the photochromic sheet limit the optical waveguide lens, the first surface of the substrate is connected to the photochromic sheet, and the grating layer is disposed between the substrate and the cover plate; Figure 5 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the second mounting part and the color-changing sheet limit the optical waveguide lens, the first surface of the substrate and the color-changing sheet are provided with a first buffer pad, the grating layer is provided between the substrate and the cover plate, and the grating layer and the cover plate are provided with a first water-proof and breathable pad. Figure 6 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the second mounting part and the color-changing sheet limit the optical waveguide lens, the first surface of the substrate is connected to the color-changing sheet, the grating layer is disposed between the substrate and the cover plate, and the grating layer and the cover plate are bonded together with adhesive. Figure 7 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the photochromic sheet is connected to the first mounting part, the second mounting part and the photochromic sheet limit the optical waveguide lens, a first buffer pad is provided between the first surface of the substrate and the photochromic sheet, the grating layer is provided between the substrate and the cover plate, and the grating layer and the cover plate are bonded together with adhesive. Figure 8This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the limiting part is connected to the first mounting part, the second mounting part and the limiting part limit the photochromic sheet and the optical waveguide lens, and the grating layer and the photochromic sheet are connected. Figure 9 This is a schematic diagram of the front frame assembly proposed in some embodiments of the present utility model, wherein the limiting part is connected to the first mounting part, the supporting part and the limiting part limit a portion of the photochromic sheet and the optical waveguide lens, and the slot limits another portion of the photochromic sheet and the optical waveguide lens, and the grating layer and the photochromic sheet are bonded together. Figure 10 This is a schematic diagram of the front frame assembly proposed in some embodiments of the present utility model, wherein a third buffer pad is provided between the color-changing sheet and the third mounting part, the cover plate is connected to the fourth mounting part, and the color-changing sheet, the substrate and the grating layer are limited between the cover plate and the third mounting part; Figure 11 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein a third buffer pad is provided between the color-changing sheet and the third mounting part, the cover plate is connected to the fourth mounting part, the color-changing sheet, the base and the grating layer are limited between the cover plate and the third mounting part, a first buffer pad is provided between the base and the color-changing sheet, and a first water-proof and breathable pad is provided between the grating layer and the cover plate. Figure 12 This is a schematic diagram of the front frame assembly proposed in some embodiments of the present utility model, wherein the photochromic sheet is connected to the first mounting part, the grating layer and the photochromic sheet are partially bonded together, the photochromic sheet and the optical waveguide lens are located on the same side of the first mounting part, and the photochromic sheet and the optical waveguide lens are centered. Figure 13 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the color-changing sheet is connected to the first mounting part, the grating layer and the color-changing sheet are fully bonded together, and the cross-sectional area of ​​the color-changing sheet is larger than the cross-sectional area of ​​the grating layer. Figure 14 This is a schematic diagram of the structure of a front frame assembly proposed in some embodiments of the present invention, wherein the color-changing sheet is connected to the first mounting part, the grating layer and the color-changing sheet are partially bonded together, and the cross-sectional area of ​​the color-changing sheet is larger than the cross-sectional area of ​​the substrate. Figure 15 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the substrate and the color-changing sheet are bonded together, the cross-sectional area of ​​the color-changing sheet is the same as the cross-sectional area of ​​the substrate, the color-changing sheet and the substrate are centered, and the grating layer is connected between the substrate and the cover plate. Figure 16This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the substrate and the color-changing sheet are bonded together, the cross-sectional area of ​​the color-changing sheet is the same as the cross-sectional area of ​​the substrate, the color-changing sheet and the substrate are centered, the grating layer is connected between the substrate and the cover plate, and the grating layer and the cover plate are bonded together on the whole surface. Figure 17 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the substrate and the color-changing sheet are bonded together, the cross-sectional area of ​​the color-changing sheet is larger than the cross-sectional area of ​​the substrate, the grating layer is connected between the substrate and the cover plate, and the grating layer and the cover plate are partially bonded together. Figure 18 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present utility model, wherein the color-changing sheet is connected to the first mounting part, the substrate and the color-changing sheet are bonded together, the cross-sectional area of ​​the color-changing sheet is larger than the cross-sectional area of ​​the substrate, the grating layer is connected between the substrate and the cover plate, and the grating layer and the cover plate are bonded together on the whole surface. Figure 19 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the cover plate is connected to the first mounting part, the grating layer and the cover plate are partially bonded together, the other side of the grating layer is connected to the second side of the substrate, and the cross-sectional area of ​​the color-changing film is the same as the cross-sectional area of ​​the substrate. Figure 20 This is a schematic diagram of the structure of the front frame assembly proposed in some embodiments of the present invention, wherein the cover plate is connected to the first mounting part, the grating layer and the cover plate are partially bonded together, the other side of the grating layer is connected to the second side of the substrate, and the cross-sectional area of ​​the color-changing film is the same as the cross-sectional area of ​​the substrate. Figure 21 This is a three-dimensional structural diagram of the smart glasses proposed in some embodiments of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1000, Smart Glasses; 100. Front frame assembly; 10. Picture frames; 11. First mounting section; 111. Mounting slot; 12. Second mounting section; 121. Support section; 122. Slot; 13. Third Installation Department; 14. Fourth Installation Department; 20. Optical waveguide lens; 21. Base; 211. First surface; 212. Second surface; 213. Side surface; 22. Cover plate; 23. Raster layer; 30. Limiting part; 31. First end; 32. Second end; 411. First waterproof and breathable pad; 412. Second waterproof and breathable pad; 421. First cushioning pad; 422. Second cushioning pad; 423. Third cushioning pad; 50. Adhesive parts; 60. Color-changing photosensitive sheet; 200. Temples of the glasses. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0021] Where there is no conflict, the following embodiments and features can be combined with each other.

[0022] The front frame assembly of smart glasses typically includes lenses and a frame. To secure the frame and lenses, the lenses are usually glued to the frame or clipped together. Taking AR glasses as an example, when the lens base is clipped to the frame, it is prone to wobbling. When the lens base is bonded to the frame, during product reliability testing in high temperature and humidity environments, the lens deforms. The base bonded to the frame is restricted in its free expansion and contraction during deformation, unable to achieve free adaptive thermal deformation or return to its original shape at room temperature. This results in irreversible deformation loss of the lens. Light cannot propagate along the preset path after entering the lens, causing a decrease in the resolution of the displayed image.

[0023] Optical waveguide lenses can reflect and transmit light emitted by optomechanical components, as well as transmit ambient light. However, in strong ambient light, the display effect of optical waveguide lenses can be affected to a certain extent, and they can also damage the user's eyes.

[0024] In view of this, the present invention proposes a front frame assembly 100 and smart glasses 1000 to further optimize the connection structure between the optical waveguide lens 20 and the frame 10, so that the structure of the front frame assembly 100 is stable after all components are assembled, and can maintain the preset optical display performance after reliability testing. It also optimizes the display effect of the optical waveguide lens under strong ambient light.

[0025] Combination Figures 1 to 7 As shown, an embodiment of the present invention proposes a front frame assembly 100, including a frame 10, an optical waveguide lens 20, and a photochromic lens 60.

[0026] The front frame assembly 100 has a proximal side that is close to the human eye. That is, the side of the front frame assembly 100 that is closer to the human eye is the proximal side, while the side that is farther away from the human eye is the ambient light side.

[0027] like Figures 1 to 9 As shown, the frame 10 is provided with a first mounting portion 11 and a second mounting portion 12 spaced apart, with the first mounting portion 11 arranged away from the near eye side and the second mounting portion 12 arranged close to the near eye side. Therefore, in these embodiments, the component mounted on the second mounting portion 12 is closer to the near eye side than the component mounted on the first mounting portion 11. The first mounting portion 11 and the second mounting portion 12 are located at different positions on the frame 10, forming different mounting locations and / or limiting structures.

[0028] Furthermore, the optical waveguide lens 20 includes at least a substrate 21 and a grating layer 23. The substrate 21 has a side surface 213 extending along the thickness direction of the substrate 21. The side surface 213 is spaced apart from the inner wall of the lens frame 10 so that the substrate 21 can have a certain amount of expansion and contraction. That is, there is no direct adhesive connection between the substrate 21 and the lens frame 10. During the process of thermal expansion and contraction, the substrate 21 is not directly restricted by the external force from the lens frame 10 and can freely expand and contract.

[0029] Furthermore, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the photochromic sheet 60 is connected to the first mounting portion 11, and an optical waveguide lens 20 is positioned between the photochromic sheet 60 and the second mounting portion 12. In a specific embodiment, the photochromic sheet 60 and the first mounting portion 11 are bonded together; alternatively, in some other embodiments, the photochromic sheet 60 and the first mounting portion 11 are snap-fitted or plugged in; or, in other embodiments, the photochromic sheet 60 and the first mounting portion 11 are bolted together. No specific limitations are imposed here, and the choice can be made flexibly according to actual needs.

[0030] Or in other solutions, such as Figure 8 and Figure 9 As shown, the front frame assembly 100 also includes a limiting part 30, which is connected to the first mounting part 11. A photochromic sheet 60 and an optical waveguide lens 20 are positioned between the limiting part 30 and the second mounting part 12.

[0031] As can be seen from the above, the front frame assembly 100 proposed in this utility model, with the lens frame 10 serving as the frame carrier of the entire front frame assembly 100, can be used to connect with the optical waveguide lens 20, and can also be used with... Figure 21The temple 200 is connected in the middle. In this application, after the nanoimprint adhesive is coated on the substrate 21, the relevant micro-nano structure is imprinted on the nanoimprint adhesive using a template, and then cured to create a composite layer with a grating layer 23 on the first surface 211 of the substrate 21, and to make the grating layer 23 stably connected to the substrate 21.

[0032] By using a photochromic sheet 60 connected to the first mounting portion 11 on the frame 10, and using the photochromic sheet 60 and the second mounting portion 12 to limit the optical waveguide lens 20; or by using a limiting portion 30 connected to the first mounting portion 11, and using the limiting portion 30 and the second mounting portion 12 to limit the optical waveguide lens 20; thus, the substrate 21 and the frame 10 are not bonded together, and the internal components of the optical waveguide lens 20 are kept in close contact. Under the premise that the substrate 21 has a certain amount of free expansion and contraction due to thermal expansion and contraction, the substrate 21 can freely deform in a high temperature and high humidity environment during the reliability test, and return to its original shape when the reliability test is completed and the substrate 21 returns to room temperature. Thus, the signal light can propagate according to the preset optical path during the propagation between the substrate 21 and the grating layer 23, ensuring that the display effect of the optical waveguide lens 20 is within the preset range.

[0033] The photochromic lens 60 of this application can change color under certain ambient light conditions, thereby blocking some ambient light from passing through, reducing interference when the optical waveguide lens 20 is used under ambient light, and increasing the application scenarios of the optical waveguide lens 20.

[0034] In some embodiments of this application, the photochromic film 60 is a photochromic film or an electrochromic film. A photochromic film changes color under certain lighting conditions; for example, it changes color when exposed to ultraviolet light within a specific wavelength range, thus protecting the user's eyes from ultraviolet radiation and effectively reducing the aging of the waveguide lens due to ultraviolet light exposure. An electrochromic film changes color when a certain electrical signal is input, achieving different appearances and significantly reducing the amount of light of a specific color entering the waveguide lens, thereby improving the user's experience when using the product in bright ambient light.

[0035] In some embodiments of this application, the limiting portion 30 is a metal limiting member or a plastic limiting member, or it may be a limiting member made of other materials. This improves the aesthetic appearance of the front frame assembly 100.

[0036] In some embodiments, the limiting part 30 is shaped to fit the frame 10 and has a curved arc segment, thereby enabling the limiting part 30 to be connected to the first mounting part 11 of the frame 10 and to fit in appearance.

[0037] In other embodiments, part of the limiting portion 30 may be replaced with the outer shell of the frame 10, and the photochromic sheet 60 may be fixed inside the frame 10 by a snap or fastener (such as a screw).

[0038] In some embodiments of this application, such as Figures 1 to 7 As shown, the substrate 21 also has a first surface 211 close to the color-changing film 60 and a second surface 212 away from the color-changing film 60.

[0039] Furthermore, such as Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the waveguide lens 20 also includes a cover plate 22, which is closer to the eye than the photochromic lens 60. A grating layer 23 is attached to the second surface 212, and the cover plate 22 is bonded to the grating layer 23. The bonding between the cover plate 22 and the grating layer 23 can be as follows: Figure 4 The partial bonding shown can be achieved by applying adhesive to the edge of the grating layer 23, for example, by creating a complete circle, so that the coupling-in or coupling-out gratings on the grating layer 23 can be encapsulated between the cover plate 22, the adhesive layer, and the substrate 21. The bonding between the cover plate 22 and the grating layer 23 can also be as follows: Figure 6 and Figure 7 The bonding is achieved by applying adhesive to the entire surface, resulting in a fully bonded connection. This enhances the connection strength and relative positional stability of the grating layer 23 relative to the cover plate 22, which is beneficial for the accurate targeting of signal light emitted from the optomechanical components to the coupling grating. In these embodiments of the present application, by placing the grating layer 23 between the substrate 21 and the cover plate 22, the grating layer 23 can be effectively protected, making it less susceptible to damage from external impacts. It also prevents contaminants such as fingerprints or dust from interfering with the coupling of light into and out of the grating layer 23.

[0040] In some specific embodiments of this application, the grating layer 23 and the cover plate 22 are bonded together using OCA (Optically Clear Adhesive). This optical adhesive is colorless and transparent with a total light transmittance greater than 99%, minimizing its impact on light propagation and allowing light to propagate stably between the substrate 21 and the grating layer 23. The optical adhesive provides good bonding strength, ensuring a stable connection between the grating layer 23 and the cover plate 22. This optical adhesive cures at room temperature, facilitating the bonding process. It is also resistant to yellowing over extended use, ensuring that the light-transmitting portion of the waveguide lens 20 remains transparent and that light propagates effectively even after prolonged use. Furthermore, the optical adhesive exhibits minimal curing shrinkage, preventing the cover plate 22 and grating layer 23 from peeling off after bonding.

[0041] Or in a further embodiment, such as Figure 5As shown, the front frame assembly 100 includes a first water-proof and breathable pad 411, which connects the cover plate 22 to the grating layer 23. By providing the first water-proof and breathable pad 411, not only can water vapor be isolated, preventing it from entering the coupling area and coupling area of ​​the grating layer 23 from the outside and affecting light propagation, but it can also maintain the pressure between the grating layer 23 and the cover plate 22 in balance with the external pressure, preventing bulging. The first water-proof and breathable pad 411 also provides some support between the grating layer 23 and the cover plate 22, preventing the cover plate 22 from being dented by external force and hitting the micro / nano structure of the grating layer 23, effectively protecting the grating layer 23. The first water-proof and breathable pad 411 also acts as a buffer when the front frame assembly 100 is subjected to external force, thereby reducing the impact of external force on the cover plate 22. The first waterproof and breathable pad 411 can also provide a certain buffer margin during the thermal expansion and deformation of the substrate 21 and the recovery of its shape at room temperature, helping the substrate 21 to return to its original position and making the cover plate 22, the substrate 21 and the grating layer 23 fit together more tightly.

[0042] In some specific embodiments of this application, in order to enable the light emitted by the optomechanical component to smoothly enter the coupling region in the optical waveguide lens 20, the first water-proof and breathable pad 411 is set away from the coupling region; at the same time, in order to enable the light transmitted by total internal reflection in the optical waveguide lens 20 to smoothly enter the human eye from the coupling region, the first water-proof and breathable pad 411 also needs to be set away from the coupling region. Therefore, in these embodiments, the setting of the first water-proof and breathable pad 411 does not affect the propagation of light.

[0043] Alternatively, in other embodiments, the optical waveguide lens 100 may not include the aforementioned cover plate 22, but may include a grating layer 23 and a substrate 21, such as... Figure 1 and Figure 2As shown, the grating layer 23 is connected to the first surface 211, and the other side of the grating layer 23 is connected to the photochromic sheet 60. The second surface 212 of the substrate 21 is exposed. In these embodiments, the photochromic sheet 60 can not only change color and block some ambient light or external light of a specific wavelength, but also act as a protective sheet to protect the grating layer 23, so that the grating layer 23 is enclosed in the space formed by the frame 10, the photochromic sheet 60 and the substrate 21. Meanwhile, since the side surface 213 and the second surface 212 of the substrate 21 are not bonded to the frame 10 at intervals, the substrate 21 is not restricted by the reaction force of the adhesive force formed by bonding with the frame 10 when it stretches and deforms. Therefore, the substrate 21 can stretch and deform freely. During the reliability test, the substrate 21 deforms freely in a high temperature and high humidity environment. After the reliability test is completed and it returns to room temperature, the substrate 21 returns to its original shape. This allows the signal light to propagate along the preset optical path between the substrate 21 and the grating layer 23, ensuring that the display effect of the optical waveguide lens 20 is within the preset range. In these embodiments, since the optical waveguide lens 20 does not have a cover plate 22, the photochromic sheet 60 can protect the grating layer 23 and effectively block some wavelengths of light, which is beneficial to the aesthetic appearance of the front frame assembly 100 of this application while achieving a thinner design.

[0044] It should be noted that the grating layer 23 of the optical waveguide lens 20 in this application has a coupling-in region and a coupling-out region. It can couple the signal light emitted by the optomechanical component from the coupling-in region into the substrate 21 (or a combination of the substrate 21 and other layer structures) and propagate it through total internal reflection, and then couple it out from the coupling-out region to the human eye, enabling the human eye to see the image. The structures on the coupling-in region and the coupling-out region are usually fine micro-nano structures, forming a coupling-in grating or a coupling-out grating. Therefore, the grating layer 23 usually needs to be placed in the inner layer for protection, so that the propagation of light by the entire optical waveguide lens 20 is kept within a preset range. In this application, when the waveguide lens 20 has a cover plate 22, the grating layer 23 is enclosed between the cover plate 22, the lens frame 10 and the substrate 21; when the waveguide lens 20 does not have a cover plate 22, the grating layer 23 is enclosed between the substrate 21, the lens frame 10 and the photochromic film 60, thereby achieving sufficient protection for the grating layer 23 and improving the drop resistance of the front frame assembly 100.

[0045] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the optical waveguide lens 20 and the photochromic sheet 60 are bonded together, for example, they can be partially bonded together; or the photochromic sheet 60 can be fully bonded and adhered to the grating layer 23.

[0046] In some embodiments of this application, a first buffer pad 421 or a second water-proof and breathable pad 412 is also provided between the optical waveguide lens 20 and the photochromic film 60.

[0047] For example, such as Figure 3 As shown, the grating layer 23 of the waveguide lens 100 is disposed between the photochromic film 60 and the substrate 21. A second water-proof and breathable pad 412 can be optionally disposed between the waveguide lens 20 and the photochromic film 60. This not only isolates water vapor, preventing it from entering the coupling area and coupling area of ​​the grating layer 23 and affecting light propagation, but also balances the pressure between the grating layer 23 and the photochromic film 60 with the external pressure, preventing bulging. The second water-proof and breathable pad 412 also provides some support between the grating layer 23 and the photochromic film 60, preventing the photochromic film 60 from being dented by external forces and impacting the micro / nano structure of the grating layer 23, effectively protecting the grating layer 23. The second water-proof and breathable pad 412 also acts as a buffer when the front frame assembly 100 is subjected to external forces, thereby reducing the impact of external forces on the photochromic film 60 or the substrate 21. The second waterproof and breathable pad 412 can also provide a certain buffer margin during the thermal expansion and deformation of the substrate 21 and its recovery to its original shape at room temperature, helping the substrate 21 to return to its original position and allowing the substrate 21, the grating layer 23, and the photochromic sheet 60 to fit together more tightly. In these embodiments, the limitation of the adhesive force between the optical waveguide lens 20 and other components is completely eliminated, and the substrate 21 can achieve sufficient expansion and contraction deformation.

[0048] For example, such as Figure 5 As shown, the grating layer 23 of the waveguide lens 100 is disposed between the cover plate 22 and the substrate 21. A first buffer pad 421 can be optionally disposed between the waveguide lens 20 and the photochromic film 60. In this case, the first buffer pad 421 not only supports the photochromic film 60 and the substrate 21, separating them, but also provides a certain supporting force during the expansion and contraction deformation of the substrate 21, allowing the substrate 21 to quickly return to its initial shape and original position. Therefore, in these embodiments, the limitation of adhesive force between the waveguide lens 20 and other components is completely eliminated, and the substrate 21 can achieve sufficient expansion and contraction deformation.

[0049] In other embodiments, while the waveguide lens 20 and the photochromic film 60 are bonded together, a first buffer pad 421 or a second waterproof and breathable pad 412 may be provided between the waveguide lens 20 and the photochromic film 60. The configuration can be flexibly set according to actual needs and is not limited here.

[0050] It should be noted that the first waterproof and breathable pad 411 and the second waterproof and breathable pad 412 in this application can be polypropylene pads or polyethylene pads, etc., without limitation, as long as the aforementioned waterproof and breathable functions can be achieved. In these embodiments, the grating layer 23 and the cover plate 22 are not bonded (or the substrate 21 and the photochromic film 60 are not bonded), and the relative position between the substrate 21 with the grating layer 23 and the cover plate 22 is stabilized entirely through the supporting and limiting effect (or the relative position between the substrate 21 and the photochromic film 60 is stabilized). This completely eliminates the pulling of glue during the deformation of the substrate 21, maintains the display effect of the optical waveguide lens 20, and has excellent environmental performance.

[0051] In some embodiments of this application, such as Figures 1 to 9 As shown, the front frame assembly 100 also includes a second buffer pad 422, which is disposed between the optical waveguide lens 20 and the second mounting portion 12. By providing the second buffer pad 422, the optical waveguide lens 20 can be effectively supported, for example, supporting the base 21 or the cover plate 22. That is to say, the second buffer pad 422 can effectively support the base 21 or the cover plate 22. The base 21 or the cover plate 22 does not need to be connected to the lens frame 10. In any case, the base 21 can not only have sufficient expansion and contraction margin during the expansion and contraction process, but also always maintain a tight fit between the grating layer 23 and the cover plate 22, or between the grating layer 23 and the photochromic film 60. Moreover, the position relative to the lens frame 10 can remain unchanged after the base 21 shrinks back to its original state, which is beneficial for the optical waveguide lens 20 to maintain the preset light display performance.

[0052] In some embodiments of this application, such as Figures 1 to 9 , Figure 13 , Figure 14 , Figure 17 , Figure 18 and Figure 20 As shown, the first mounting part 11 includes a mounting groove 111, the opening of which faces away from the near eye side, and an adhesive part 50 is provided in the mounting groove 111. By opening the mounting groove 111 and providing the adhesive part 50 in the groove, not only can a certain amount of adhesive be accommodated, but the height of the frame 10 and the photochromic lens 60, or the frame 10 and the limiting part 30, or the frame 10 and the cover plate 22 after connection can be controlled within a suitable range. This effectively prevents the photochromic lens 60, the limiting part 30, or the cover plate 22 from protruding too much from the frame 10, thereby facilitating the thinning of the front frame assembly 100 and improving the aesthetics and integration of the front frame assembly 100's appearance design.

[0053] In some specific embodiments, the mounting groove 111 has a first groove wall near the center of the optical waveguide lens 20 and a second groove wall away from the center of the optical waveguide lens 20. The height of the first groove wall is less than the height of the second groove wall. The end edge of the photochromic film 60, the cover plate 22, or the limiting part 30 is spaced apart from or contacts the inner side of the second groove wall for limiting, so that the second groove wall can circumferentially limit the photochromic film 60, the cover plate 22, or the limiting part 30, effectively preventing the photochromic film 60, the cover plate 22, or the limiting part 30 from coming outward from the periphery of the frame 10. The surface of the photochromic film 60, the cover plate 22, or the limiting part 30 contacts the top surface of the first groove wall, so that the first groove wall can support the photochromic film 60, the cover plate 22, or the limiting part 30, effectively improving the stability of the photochromic film 60, the cover plate 22, or the limiting part 30 relative to the frame 10. In these embodiments, when the positions of the photochromic lens 60, cover plate 22, or limiting part 30 and the frame 10 are relatively stable, the photochromic lens 60, cover plate 22, or limiting part 30 is bonded to the adhesive part 50 in the mounting groove 111, thereby achieving the support and connection of the frame 10 to the photochromic lens 60, cover plate 22, or limiting part 30.

[0054] In some other embodiments of this application, such as Figure 10 , Figure 11 , Figure 12 , Figure 15 , Figure 16 and Figure 19 As shown, the first mounting part 11 includes a mounting groove 111, the opening of which faces the near eye side. An adhesive part 50 is provided in the mounting groove 111, and the adhesive part 50 is bonded to the surface of the cover plate 22. In these embodiments, the optical waveguide lens 20 is completely recessed within the space enclosed by the frame 10. The surface of the cover plate 22 away from the grating layer 23 can be flush with the surface of the frame 10, or the side of the photochromic film 60 away from the optical waveguide lens 20 can be flush with the surface of the frame 10 or have a certain distance difference, which is beneficial for the thin design of the front frame assembly 10.

[0055] In some embodiments of this application, the side of the photochromic lens 60 away from the waveguide lens 20 is bonded to the adhesive portion 50. The photochromic lens 60 and the waveguide lens 20 are arranged sequentially in a direction perpendicular to the opening of the mounting groove 111, and the surface of the waveguide lens 20 away from the photochromic lens 60 does not protrude from the outer surface of the frame 10. Therefore, in these embodiments, the photochromic lens 60 does not protrude from the frame 10, improving aesthetics. In specific embodiments, the waveguide lens 20 can also be configured not to protrude from the frame 10, which is beneficial for thinning and aesthetics.

[0056] In some embodiments of this application, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 13 , Figure 14 , Figure 17 , Figure 18 As shown, along the extension direction parallel to the photochromic film 60, the cross-sectional area of ​​the photochromic film 60 is larger than the cross-sectional area of ​​the substrate 21. The projected outline of the substrate 21 on the surface facing the photochromic film 60 does not exceed the surface outline of the photochromic film 60. The edge of the photochromic film 60 is bonded to the adhesive portion 50. In these embodiments, by extending the edge of the photochromic film 60, a larger adhesive surface can be formed between the photochromic film 60 and the adhesive portion 50, allowing the photochromic film 60 to be stably connected to the frame 10 through the adhesive portion 50. Furthermore, after being attached to the frame 10, the photochromic film 60 can cover one side of the entire outer surface of the frame 10, improving the aesthetics of the appearance. It can also effectively prevent dust, sweat, and other contaminants from entering the grating layer 23 inside the waveguide lens 20 from one side of the photochromic film 60, thereby providing further protection and contamination isolation for the grating layer 23.

[0057] In some embodiments of this application, such as Figure 8 and Figure 9 As shown, the front frame assembly 100 includes a limiting portion 30, and the second mounting portion 12 includes a support portion 121. The first end 31 of the limiting portion 30 is bonded to the adhesive portion 50, and the second end 32 of the limiting portion 30 extends away from the first end 31, and the second end 32 is spaced apart from the support portion 121. The photochromic lens 60 and the optical waveguide lens 20 are limited between the second end 32 and the support portion 121. In these embodiments, by additionally providing the limiting portion 30, the optical waveguide lens 20 and the photochromic lens 60 can be limited to a specific position between the frame 10 and the limiting portion 30, which facilitates installation and also prevents adhesion between the substrate 21 and the frame 10, allowing the substrate 21 to maintain a certain deformation allowance.

[0058] In some further embodiments, such as Figure 9 As shown, the second mounting part 12 includes a slot 122, in which a portion of the waveguide lens 20 and the photochromic film 60 are connected, and the other portion of the waveguide lens 20 and the photochromic film 60 is positioned between the second end 32 of the limiting part 30 and the support part 121. In these embodiments, by engaging one end of the waveguide lens 20 and the photochromic film 60 in the slot 122, supporting the other end of the waveguide lens 20 and the photochromic film 60 on the support part 121, and providing an adhesive part 50 in the mounting groove 111, the limiting part 30 presses the waveguide lens 20 and the photochromic film 60 together with the adhesive part 50, thus effectively limiting the waveguide lens 20 by the limiting part 30 and the support part 121.

[0059] The following describes a front frame assembly 100 proposed in some other embodiments of this application. In these embodiments, the optical waveguide lens 20 has a cover plate 22, and the optical waveguide lens 20 and the photochromic film 60 are connected to the fourth mounting portion 14 through the cover plate 22. The cover plate 22 and the third mounting portion 13 limit the photochromic film 60, the grating layer 23 and the substrate 21.

[0060] like Figure 10 and Figure 11 As shown, an embodiment of the present invention proposes a front frame assembly 100, which has a proximal side close to the human eye. The front frame assembly 100 includes: a frame 10, a photochromic lens 60, and a waveguide lens 20.

[0061] The frame 10 is provided with a third mounting part 13 and a fourth mounting part 14 spaced apart, with the third mounting part 13 being arranged away from the near eye side and the fourth mounting part 14 being arranged close to the near eye side.

[0062] The photochromic lens 60 is supported on the third mounting part 13, meaning that the photochromic lens 60 is not directly connected to the frame 10, and in particular, it is not bonded.

[0063] Furthermore, the optical waveguide lens 20 includes a substrate 21, a grating layer 23, and a cover plate 22. The cover plate 22 is connected to the fourth mounting part 14. The grating layer 23 is connected between the cover plate 22 and the substrate 21. The first surface 211 of the substrate 21 is bonded to the photochromic film 60 and / or has a first buffer pad 421. The second surface 212 of the substrate 21 is connected to the grating layer 23. The substrate 21 also has a side surface 213 extending along the thickness direction of the substrate 21. The side surface 213 is spaced apart from the inner wall of the lens frame 10 so that the substrate 21 can have a certain amount of expansion and contraction.

[0064] As can be seen from the above, the front frame assembly 100 proposed in this utility model has a cover plate 22 connected to the fourth mounting part 14, and a photochromic sheet 60 supported by the third mounting part 13. The cover plate 22 and the photochromic sheet 60 confine the grating layer 23 and the substrate 21 between the third mounting part 13 and the fourth mounting part 14. Simultaneously, the substrate 21 has a certain amount of free expansion and contraction due to thermal expansion and contraction. During reliability testing, the substrate 21 can freely deform in a high-temperature and high-humidity environment, and return to its original shape at room temperature after the reliability test. This allows the signal light to propagate along a preset optical path between the substrate 21 and the grating layer 23, ensuring that the display effect of the optical waveguide lens 20 is within a preset range. The photochromic sheet 60 can change color under certain ambient light conditions, thereby blocking some ambient light from passing through, reducing interference when the optical waveguide lens 20 is used under ambient light, and increasing the application scenarios of the optical waveguide lens 20.

[0065] It should be noted that, provided that the solutions do not contradict each other, the structure of the third mounting part 13 in this application can refer to the structure of the second mounting part 12 mentioned above, and the structure of the fourth mounting part 14 in this application can refer to the structure of the first mounting part 11 mentioned above, which will not be elaborated here.

[0066] In some embodiments of this application, such as Figure 10 and Figure 11 As shown, the front frame assembly 100 also includes a third buffer pad 423, which is disposed between the photochromic lens 60 and the third mounting portion 13. The third buffer pad 423 can support the photochromic lens 60, thereby enabling the photochromic lens 60 to press against the substrate 21, which is beneficial to maintaining the stability of the relative position between the waveguide lens 20, the photochromic lens 60 and the frame 10.

[0067] It should be noted that the first buffer pad 421, the second buffer pad 422 and the third buffer pad 423 in this application can be rubber pads, silicone pads, thermoplastic elastomer pads, sponge pads, plastic pads, etc., as long as they can achieve the aforementioned buffering and support effects, there are no restrictions here.

[0068] The following describes a front frame assembly 100 proposed in some embodiments of this application, in which a second mounting portion 12 is not provided.

[0069] Combination Figure 12 , Figure 13 and Figure 14 As shown, an embodiment of the present invention provides a front frame assembly 100, which has a near-eye side facing the human eye. The front frame assembly 100 includes: a frame 10, a photochromic lens 60, and a waveguide lens 20.

[0070] The frame 10 is provided with a first mounting part 11. Under the premise that the scheme does not contradict each other, the structure of the first mounting part 11 can refer to the above description, and will not be repeated here.

[0071] Furthermore, the photochromic filter 60 is connected to the first mounting part 11. The photochromic filter 60 is located on the side away from the eye, so that ambient light can preferentially enter the photochromic filter 60, and the light formation of the optical mechanism component entering the optical waveguide lens 20 can be effectively prevented from being weakened due to the photochromic filter 60 being located on the eye side.

[0072] Furthermore, the waveguide lens 20 is disposed on the near-eye side. The waveguide lens 20 includes a substrate 21 and a grating layer 23. The substrate 21 has a first surface 211 facing the photochromic lens 60, a second surface 212 away from the photochromic lens 60, and a side surface 213 extending along the thickness direction of the substrate 21. The grating layer 23 is connected to the first surface 211. The side surface 213 and the second surface 212 are both spaced apart from the inner wall of the frame 10 so that the substrate 21 can have a certain amount of expansion and contraction. The grating layer 23 is bonded to the photochromic lens 60.

[0073] As can be seen from the above, the front frame assembly 100 proposed in this utility model connects the photochromic sheet 60 to the first mounting part 11, and places the grating layer 23 between the photochromic sheet 60 and the substrate 21. One side of the grating layer 23 is connected to the first surface 211 of the substrate 21, and the other side of the grating layer 23 is connected to the photochromic sheet 60. This allows the relative position between the optical waveguide lens 20 and the photochromic sheet 60 to remain unchanged, thereby keeping the position of the optical waveguide lens 20 relative to the frame 10 unchanged. The second surface 212 and the side surface 213 of the substrate 21 remain unchanged. All elements are spaced apart from the inner wall of the frame 10, and the substrate 21 is not bonded to the frame 10. The substrate 21 has a certain amount of free expansion and contraction due to thermal expansion and contraction. During reliability testing, the substrate 21 can freely deform in a high-temperature and high-humidity environment, and return to its original shape after returning to room temperature. This allows the signal light to propagate along a preset optical path between the substrate 21 and the grating layer 23, ensuring that the display effect of the optical waveguide lens 20 is within a preset range. The photochromic sheet 60 can change color under certain ambient light conditions, thereby blocking some ambient light from passing through, reducing interference when the optical waveguide lens 20 is used under ambient light, and increasing the application scenarios of the optical waveguide lens 20.

[0074] Without contradiction, the specific structural forms of the first mounting part 11, the photochromic sheet 60, and the optical waveguide lens 20 in these embodiments of this application, as well as the connection forms between the components, can be referred to the above description, and will not be repeated here.

[0075] In some embodiments of this application, such as Figure 13 and Figure 14 As shown, along the extension direction parallel to the photochromic lens 60, the cross-sectional area of ​​the photochromic lens 60 is larger than the cross-sectional area of ​​the base 21. The projection of the second surface 212 of the base 21 onto the surface of the photochromic lens 60 does not overlap with the projection of the frame 10 onto the surface of the photochromic lens 60. In other words, the second surface 212 of the base 21 is spaced apart from the frame 10, allowing the base 21 to freely expand and contract without being affected by the frame 10.

[0076] In other embodiments of this application, such as Figure 12 As shown, the cross-sectional area of ​​the photochromic lens 60 is the same as that of the substrate 21, and the photochromic lens 60 and the substrate 21 are centered. In these embodiments, it is advantageous for the edges of the entire optical waveguide lens 20 and the photochromic lens 60 to be aligned, making it convenient to place the optical waveguide lens 20 and the photochromic lens 60 into the space enclosed by the frame 10, and to bond the photochromic lens 60 to the first mounting part 11 through the adhesive part 50.

[0077] The following describes a front frame assembly 100 proposed in some embodiments of the present invention, wherein the optical waveguide lens 20 in these embodiments has a cover plate 22 and does not have a second mounting portion 12.

[0078] like Figures 15 to 20 As shown, an embodiment of the present invention provides a front frame assembly 100, which has a near-eye side facing the human eye. The front frame assembly 100 includes: a frame 10, a photochromic lens 60, and a waveguide lens 20.

[0079] The frame 10 has a first mounting part 11, and the photochromic lens 60 is located on the side away from the near eye. The photochromic lens 60 is located on the side away from the near eye, so that ambient light can preferentially enter the photochromic lens 60, and the light formation of the optical mechanism components entering the optical waveguide lens 20 is effectively prevented from being weakened due to the photochromic lens 60 being located on the near eye side.

[0080] Furthermore, the waveguide lens 20 is disposed on the near-eye side. The waveguide lens 20 includes a cover plate 22, a substrate 21, and a grating layer 23. The substrate 21 has a first surface 211 facing the photochromic lens 60, a second surface 212 away from the photochromic lens 60, and a side surface 213 extending along the thickness direction of the substrate 21. The side surface 213 is spaced apart from the inner wall of the frame 10 so that the substrate 21 can have a certain amount of expansion and contraction. The grating layer 23 is connected to the second surface 212 of the substrate 21 and is bonded to the cover plate 22. The second surface 212 of the substrate 21 is bonded to the photochromic lens 60. The photochromic lens 60 or the cover plate 22 is connected to the first mounting part 11.

[0081] As can be seen from the above, the front frame assembly 100 proposed in this utility model is connected to the first mounting part 11 by using a photochromic sheet 60 or a cover plate 22. The two sides of the grating layer 23 are respectively connected to the base 21 and the cover plate 22. The grating layer 23 can be protected by the cover plate 22. The base 21 is bonded to the photochromic sheet 60, so that the relative positions between the optical waveguide lens 20, the photochromic sheet 60 and the lens frame 10 remain unchanged. The side 213 of the base 21 is spaced apart from the inner wall of the lens frame 10, and the base 21 and the lens frame 10 are not bonded. The base 21 has a certain amount of free expansion and contraction due to thermal expansion and contraction. During the reliability test, the base 21 can freely deform in a high temperature and high humidity environment. After the reliability test is completed and the base returns to room temperature, the base 21 returns to its original shape. Thus, during the propagation of signal light between the base 21 and the grating layer 23, it can propagate according to the preset optical path, ensuring that the display effect of the optical waveguide lens 20 is within the preset range. The photochromic lens 60 can change color under certain ambient light conditions, thereby blocking some of the ambient light from passing through, reducing interference when the optical waveguide lens 20 is used under ambient light, and increasing the application scenarios of the optical waveguide lens 20.

[0082] In these embodiments, it can be as follows Figure 19 and Figure 20 The cover plate 22 shown is connected to the first mounting part 12; it can also be as follows: Figure 15 , Figure 16 , Figure 17 and Figure 18 The color-changing sheet 60 shown is attached to the first mounting part 12.

[0083] Provided that the solutions are not contradictory, the specific structural forms of the first mounting part 11, the photochromic sheet 60, and the optical waveguide lens 20 in these embodiments of this application, as well as the connection forms between the components, can be referred to the above description and will not be repeated here.

[0084] In some embodiments of this invention, the substrate 21 can be made of materials such as glass, sapphire, polycarbonate, and acrylic; the cover plate 22 can be made of one or more of glass, polycarbonate, and acrylic. The substrate 21 and cover plate 22 made of the above-mentioned materials have good transparency, are lightweight, possess certain mechanical strength and toughness, and are not easily broken by external forces, which is beneficial for supporting and protecting the grating layer 23. For example, when glass is used, it is easy to process, colorless and transparent, and has good support. When polycarbonate (PC) is used, it is colorless and transparent, heat-resistant, impact-resistant, inexpensive, and readily available. When acrylic (PMMA, polymethyl methacrylate) is used, it has high transmittance, good toughness, high hardness, is not easily broken, and is easy to bond. Of course, the choice of materials for the substrate 21 and cover plate 22 is not limited to the above-mentioned material types; other polymer materials with similar properties can also be used, such as cyclic olefin copolymer plastics (COC plastics), which have high transparency, excellent low-temperature impact resistance, and elasticity. For example, cyclic olefin polymers (COPs) have characteristics such as high transparency, high gloss, high water vapor barrier properties, high rigidity and strength, and excellent chemical resistance.

[0085] In some embodiments of this invention, to improve the anti-fouling performance of the cover plate 22 or the substrate 21, an anti-fouling film can be provided on the exposed surface of the cover plate 22 or the substrate 21. This anti-fouling film provides some protection for the cover plate 22 or the substrate 21, effectively preventing dust, fingerprints, and other contaminants from adhering to the surface of the cover plate, thus maintaining the cleanliness and aesthetic appearance of the waveguide lens 20. In some specific embodiments, the anti-fouling film is an AF film (Anti-Fingerprint) layer. The AF film effectively resists the adhesion of fingerprints and stains. It has advantages such as high transparency, high hardness, scratch resistance, and chemical corrosion resistance, thereby effectively protecting the exposed surface of the cover plate 22.

[0086] The smart glasses 1000 of this application will now be described. It should be noted that the smart glasses 1000 of this application can be a head-mounted device such as AR (Augmented Reality) glasses, VR (Virtual Reality) glasses, or MR (Mixed Reality) glasses.

[0087] like Figure 21 As shown, this utility model proposes a smart glasses 1000, including temples 200 and front frame assembly 100 of the aforementioned embodiments, with the temples 200 connected to the front frame assembly 100.

[0088] As can be seen from the above, the smart glasses 1000 proposed in this utility model can be conveniently worn on the ear through the temples 200. Since the smart glasses 1000 has the front frame component 100 of the aforementioned embodiment, it also has the beneficial effects brought by the aforementioned front frame component 100, which will not be elaborated here.

[0089] In other embodiments, the smart glasses 1000 of this application may also include components such as optical engine components and control circuits, which are existing technologies well known to those skilled in the art and will not be described in detail here.

[0090] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A front frame assembly, characterized in that, The front frame assembly has a proximal side close to the human eye, and the front frame assembly includes: The eyeglass frame has a first mounting portion and a second mounting portion spaced apart on it, wherein the first mounting portion is arranged away from the near eye side and the second mounting portion is arranged close to the near eye side; An optical waveguide lens, comprising at least a substrate and a grating layer, wherein the substrate has a side surface extending along its thickness direction, the side surface being spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction; and, The photochromic lens is connected to the first mounting portion, and the optical waveguide lens is positioned between the photochromic lens and the second mounting portion; or, the front frame assembly further includes a limiting portion, which is connected to the first mounting portion, and the photochromic lens and the optical waveguide lens are positioned between the limiting portion and the second mounting portion.

2. The front frame assembly as claimed in claim 1, characterized in that, The substrate further has a first side close to the color-changing film and a second side away from the color-changing film; and The optical waveguide lens also includes a cover plate, which is closer to the near-eye side than the photochromic lens. The grating layer is connected to the second surface. The cover plate is bonded to the grating layer, or the front frame assembly includes a first water-proof and breathable pad, with the first water-proof and breathable pad connected between the cover plate and the grating layer. Alternatively, the grating layer is connected to the first surface, the other side of the grating layer is connected to the color-changing film, and the second surface of the substrate is exposed.

3. The front frame assembly as described in claim 1 or 2, characterized in that, The optical waveguide lens and the photochromic film are bonded together; and / or... It also includes a first buffer pad or a second water-proof and breathable pad, with the first buffer pad or the second water-proof and breathable pad provided between the optical waveguide lens and the photochromic film.

4. The front frame assembly as claimed in claim 3, characterized in that, It also includes a second buffer pad, which is disposed between the optical waveguide lens and the second mounting portion.

5. The front frame assembly as claimed in claim 1 or 2, characterized in that, The first mounting part includes a mounting groove, the opening of which is opened away from the side near the eye, and an adhesive part is provided in the mounting groove.

6. The front frame assembly as claimed in claim 5, characterized in that, The photochromic sheet is bonded to the adhesive part on the side away from the optical waveguide lens. The photochromic sheet and the optical waveguide lens are arranged sequentially in a direction perpendicular to the groove opening of the mounting groove. The surface of the optical waveguide lens away from the photochromic sheet does not protrude from the outer surface of the frame.

7. The front frame assembly as claimed in claim 5, characterized in that, Along the extension direction parallel to the color-changing sheet, the cross-sectional area of ​​the color-changing sheet is larger than the cross-sectional area of ​​the substrate, the projected outline of the substrate on the surface facing the color-changing sheet does not exceed the surface outline of the color-changing sheet, and the edge of the color-changing sheet is bonded to the adhesive portion.

8. The front frame assembly as claimed in claim 5, characterized in that, The front frame assembly includes a limiting part, the second mounting part includes a supporting part, the first end of the limiting part is bonded to the adhesive part, the second end of the limiting part extends away from the first end, and the second end is spaced apart from the supporting part, and the photochromic film and the optical waveguide lens are limited between the second end and the supporting part.

9. The front frame assembly as claimed in claim 8, characterized in that, The second mounting portion includes a slot in which a portion of the optical waveguide lens and a portion of the photochromic film are connected, and another portion of the optical waveguide lens and the photochromic film are positioned between the second end of the limiting portion and the supporting portion.

10. A front frame assembly, characterized in that, The front frame assembly has a proximal side close to the human eye, and the front frame assembly includes: The eyeglass frame has a third mounting portion and a fourth mounting portion spaced apart, wherein the third mounting portion is arranged away from the near eye side and the fourth mounting portion is arranged close to the near eye side; A color-changing sheet, the color-changing sheet being supported on the third mounting portion; An optical waveguide lens includes a substrate, a grating layer, and a cover plate. The cover plate is connected to the fourth mounting part. The grating layer is connected between the cover plate and the substrate. A first surface of the substrate is bonded to the photochromic film and / or has a first buffer pad. A second surface of the substrate is connected to the grating layer. The substrate also has a side surface extending along the thickness direction of the substrate. The side surface is spaced apart from the inner wall of the lens frame so that the substrate can have a certain amount of expansion and contraction.

11. The front frame assembly as claimed in claim 10, characterized in that, It also includes a third buffer pad, which is disposed between the color-changing sheet and the third mounting part.

12. A front frame assembly, characterized in that, The front frame assembly has a proximal side facing the human eye, and the front frame assembly includes: A mirror frame, wherein a first mounting portion is provided on the mirror frame; A color-changing lens, which is connected to the first mounting part and is located on the side away from the near-eye side; An optical waveguide lens is disposed on the near-eye side. The optical waveguide lens includes a substrate and a grating layer. The substrate has a first surface facing the photochromic lens, a second surface away from the photochromic lens, and a side surface extending along the thickness direction of the substrate. The grating layer is connected to the first surface. The side surface and the second surface are spaced apart from the inner wall of the lens frame so that the substrate can have a certain amount of expansion and contraction. The grating layer is bonded to the photochromic lens.

13. The front frame assembly as claimed in claim 12, characterized in that, Along the extending direction parallel to the photochromic film, the cross-sectional area of ​​the photochromic film is larger than the cross-sectional area of ​​the substrate, and the projection of the second surface of the substrate onto the surface of the photochromic film does not overlap with the projection of the frame onto the surface of the photochromic film; or, The cross-sectional area of ​​the color-changing sheet is the same as the cross-sectional area of ​​the substrate, and the color-changing sheet and the substrate are centered on each other.

14. A front frame assembly, characterized in that, The front frame assembly has a proximal side facing the human eye, and the front frame assembly includes: A mirror frame, wherein a first mounting portion is provided on the mirror frame; A photochromic lens, wherein the photochromic lens is disposed on the side opposite to the side near the eye; An optical waveguide lens is disposed on the near-eye side. The optical waveguide lens includes a cover plate, a substrate, and a grating layer. The substrate has a first surface facing the photochromic lens, a second surface away from the photochromic lens, and a side surface extending along the thickness direction of the substrate. The side surface is spaced apart from the inner wall of the lens frame to allow the substrate to have a certain amount of expansion and contraction. The grating layer is connected to the second surface of the substrate and is bonded to the cover plate. The second surface of the substrate is bonded to the photochromic lens. The color-changing sheet or the cover plate is connected to the first mounting part.

15. The front frame assembly as claimed in any one of claims 1 or 2, 10-14, characterized in that, The color-changing film is a photochromic film or an electrochromic film.

16. A type of smart glasses, characterized in that, It includes temples and a front frame assembly as described in any one of claims 1 to 15, wherein the temples are connected to the frame of the front frame assembly.

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