Optical machine module, near-to-eye display device, intelligent glasses and intelligent swimming goggles

Abstract

The invention provides an optical machine module, a near-to-eye display device, intelligent glasses and intelligent swimming goggles. The ray machine module comprises a display device used for emitting a light beam; the light beam steering element is located on the light emitting side of the display device, light beams emitted by the display device and propagating in the first direction are propagated in the second direction after being deflected by the light beam steering element, and an angle is formed between the first direction and the second direction; the light beam shaping lens group is used for shaping the light beams, the light beam shaping lens group comprises a first lens, a second lens and a third lens, the first lens is located between the display device and the light beam steering element, the third lens is located on the light emitting side of the light beam steering element, and the second lens is located between the first lens and the third lens. According to the invention, the problems of large size, heavy weight and incompact structure of an optical machine module in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular, to an optical engine module, a near-eye display device, smart glasses, and smart goggles. Background Art

[0002] In the current field of augmented reality technology, as an important tool for carrying the augmented reality experience, the design of smart glasses faces many challenges. Among them, the light waveguide display technology has been widely used in smart glasses due to its light and thin characteristics. However, the design of its supporting optical engine module has become a bottleneck restricting the miniaturization and lightweight development of smart glasses. In the traditional optical engine / optical engine structure, display devices such as organic light-emitting diodes (OLEDs) are arranged horizontally, resulting in a relatively large size of the optical engine module in the thickness direction. This not only increases the weight of the device but also affects the appearance design of the smart glasses, making the device bulky, causing pressure on the human face when worn, and reducing the user experience.

[0003] As Fig.10 shown, the existing optical engine module usually adopts a straight-tube lens group 2', which consists of about 4 lenses. This structural design is simple but has obvious limitations. Since the display device 110' is arranged horizontally, the light beam needs to pass through a series of lens groups 2' before being received by the light waveguide sheet 21'. The size and number of lenses during the process limit the overall compactness of the optical engine module, increasing the manufacturing cost and assembly difficulty. In addition, the light beam passes through more lenses during the transmission process, resulting in light energy loss and affecting the final display effect. In the development of smart glasses that pursue a larger field of view, higher image quality, and a more comfortable wearing experience, the design of the existing optical engine module can no longer meet the requirements and has become a major obstacle to the development of augmented reality technology.

[0004] That is to say, the optical engine module in the prior art has problems of large volume, heavy weight, and non-compact structure. Summary of the Invention

[0005] The main purpose of the present invention is to provide an optical engine module, a near-eye display device, smart glasses, and smart goggles to solve the problems of large volume, heavy weight, and non-compact structure of the optical engine module in the prior art.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided an optical engine module, including: a display device for emitting a light beam; a beam steering element located on the light-emitting side of the display device, and the light beam propagating in the first direction emitted by the display device is deflected by the beam steering element and then propagates in the second direction, and an angle is provided between the first direction and the second direction; a beam shaping lens group for shaping the light beam, the beam shaping lens group includes a first lens, a second lens and a third lens, the first lens is located between the display device and the beam steering element, the third lens is located on the light-emitting side of the beam steering element, and the second lens is located between the first lens and the third lens.

[0007] Further, the beam steering element includes a reflection surface, and the included angle between the reflection surface and the display device is an acute angle.

[0008] Further, the beam steering element is a prism, the prism includes a first transmission surface, a reflection surface and a second transmission surface connected in sequence, and the light beam entering the prism from the first transmission surface is emitted from the second transmission surface after being reflected by the reflection surface.

[0009] Further, the prism is integrally formed or glued to the second lens; or, the prism is spaced from the second lens.

[0010] Further, the second lens is composed of a first sub-lens and a second sub-lens. When the prism is integrally formed or glued to the second lens, the first sub-lens is integrally formed or glued to the first transmission surface, and the second sub-lens is integrally formed or glued to the second transmission surface.

[0011] Further, the second lens is composed of a first sub-lens and a second sub-lens, the first sub-lens is located between the first lens and the beam steering element, and the second sub-lens is located between the beam steering element and the third lens.

[0012] Further, the refractive indices of the first lens, the second lens and the third lens are all greater than 1.47 and less than or equal to 1.67.

[0013] Further, the first lens, the second lens and the third lens are all edge-cut lenses, and the aperture D of the edge-cut lens and the total focal length fn of the optical engine module satisfy: 0 < D / fn ≤ 0.53.

[0014] Further, the optical engine module satisfies at least one of the following conditions: the focal length f1 of the first lens and the total focal length of the optical engine module satisfy: -7.8 ≤ f1 / fn ≤ 2.8; the focal length f2 of the second lens and the total focal length fn of the optical engine module satisfy: -8.1 ≤ f2 / fn ≤ 4.9; the focal length f3 of the third lens and the total focal length fn of the optical engine module satisfy: 1.5 ≤ f3 / fn ≤ 2.5.

[0015] According to another aspect of the present invention, there is provided a near-eye display device, including: the above optical engine module; a waveguide display module, the waveguide display module includes a waveguide and an input element and an output element disposed on the waveguide, and the light beam emitted by the optical engine module is introduced into the waveguide through the input element and is output to the human eye by the output element after total reflection transmission in the waveguide.

[0016] Further, both the input element and the output element are volume holographic gratings, and / or the periods of the input element and the output element are the same.

[0017] Further, both the input element and the output element are angular multiplexing gratings, and the input element is divided into a plurality of input grating regions, the output element is divided into a plurality of output grating regions, and the plurality of input grating regions correspond to the plurality of output grating regions one by one.

[0018] Further, the input element is an input grating, the output element is an output grating, the input grating is disposed on one side surface of the waveguide, the waveguide has an inclined surface, and an acute angle or an obtuse angle is formed between the inclined surface and the one side surface of the waveguide, and the output grating is disposed on the inclined surface.

[0019] Further, the waveguide display module further includes a compensation mirror, the compensation mirror is adhered to the inclined surface of the waveguide, and the output grating is clamped between the inclined surface of the waveguide and the compensation mirror.

[0020] According to another aspect of the present invention, there is provided a smart glasses, including: a frame and the above near-eye display device, the frame includes a front frame and a rear frame, and the waveguide of the near-eye display device is installed between the front frame and the rear frame; further includes an optical engine housing and an optical bracket, the optical engine housing is disposed in the frame for fixing the optical engine module of the near-eye display device, and the optical engine housing is installed on the waveguide through the optical bracket.

[0021] According to another aspect of the present invention, there is provided a smart swimming goggles, including: a frame; the above near-eye display device, the optical engine module and the waveguide display module of the near-eye display device are both disposed in the frame, and the input element of the waveguide display module is the surface of the waveguide, and the surface is a plane or a curved surface.

[0022] Applying the technical solution of the present invention, by setting a beam steering element to change the beam propagation direction, the optical path can be effectively folded, the length dimension of the optical engine module can be compressed, which is beneficial to improving the structural compactness of the optical engine module. At the same time, combined with the beam shaping effects of the first lens, the second lens and the third lens, the effective management and utilization of the beam can be realized; in addition, the number of lenses for shaping is also saved, which is beneficial to reducing the overall weight of the optical engine module, thereby ensuring the light weight of the optical engine module and improving the portability of the intelligent device to which it is applied. The application scenarios of the optical engine module of this application include but are not limited to smart glasses, smart goggles, etc., and are particularly suitable for occasions that require long-term wearing, such as military training, industrial maintenance, medical guidance, etc., which reduces the burden on the wearer and improves the use comfort. Brief Description of the Drawings

[0023] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 Shows a schematic structural diagram of an optical engine module of an optional embodiment of the present invention;

[0025] Figure 2 Shows a partial schematic diagram of an optical engine module of another optional embodiment of the present invention;

[0026] Figure 3 Shows Figure 2 The optical path diagram of the prism in

[0027] Figure 4 Shows a partial structural schematic diagram of an optical engine module of another optional embodiment of the present invention;

[0028] Figure 5 Shows a schematic structural diagram of a near-eye display device of an optional embodiment of the present invention;

[0029] Figure 6 Shows Figure 5 The optical path diagram of an optional embodiment of the waveguide display module in

[0030] Figure 7 Shows a schematic structural diagram of a near-eye display device of another optional embodiment of the present invention;

[0031] Figure 8 Shows Figure 5 A partial schematic diagram of an optional embodiment of the smart glasses in

[0032] Fig. 9 Shows a schematic structural diagram of another optional embodiment of the smart goggles of the present invention;

[0033] Fig.10 Shows a schematic structural diagram of an optical-mechanical module in the prior art;

[0034] Fig.11 Shows a schematic structural diagram of a smart glasses according to an embodiment provided by the present invention;

[0035] Fig.12 Shows Fig.11 The exploded structural diagram of the smart glasses in;

[0036] Fig.13 Shows Fig.11 The schematic structural diagram of the smart glasses in omitting part of the frame;

[0037] Fig.14 Shows Fig.11 The cross-sectional view of the smart glasses in;

[0038] Fig.15 Shows the schematic structural diagram of the smart glasses omitting part of the frame according to another embodiment provided by the present invention;

[0039] Fig.16 Shows Fig.15 The enlarged structural diagram of part A in;

[0040] Fig.17 Shows Fig.15 The enlarged structural diagram of part B in;

[0041] Fig.18 Shows the cross-sectional view of the smart glasses according to another embodiment provided by the present invention;

[0042] Fig.19 Shows Fig.11 The schematic structural diagram of the smart glasses and the first expansion lens in;

[0043] Fig. 20 Shows Fig.19 The exploded structural diagram of the smart glasses and the first expansion lens in;

[0044] Fig.21 Shows Fig. 20 The enlarged structural diagram of part C in;

[0045] Fig. 22 Shows Fig.19 The cross-sectional view of;

[0046] Fig.23 Shows Fig.11 The schematic structural diagram of the smart glasses and the second expansion lens in;

[0047] Fig.24 Shows Fig.23Schematic diagram of the decomposition structure of the smart glasses and the second extension lens;

[0048] Fig.25 shows Fig.11 Schematic diagram of the structure of part of the spectacle frame and the nose pad in;

[0049] Fig.26 shows Fig.25 Schematic diagram of the decomposition structure of part of the spectacle frame and the nose pad in;

[0050] Fig. 27 shows Fig.26 Schematic diagram of the enlarged structure of part D in;

[0051] Fig.28 shows Fig.26 Schematic diagram of the structure of the nose pad in;

[0052] Fig.29 shows Fig.25 Cross-sectional view of;

[0053] Fig.30 shows Fig.11 Cross-sectional view of the smart glasses in;

[0054] Fig.31 shows Fig.30 Schematic diagram of the structure of the optical engine module, the optical engine housing and the optical bracket in;

[0055] Fig.32 shows Fig.31 Schematic diagram of the decomposition structure of the optical engine module, the optical engine housing and the optical bracket in;

[0056] Fig.33 shows Fig.30 Schematic diagram of the structure of the optical bracket and the waveguide in;

[0057] Fig.34 shows Fig.11 Schematic diagram of the smart glasses with some structures omitted in;

[0058] Fig.35 shows Fig.34 Schematic diagram of the structure with the rotating shaft structure omitted in;

[0059] Fig.36 shows Fig.11 Schematic diagram of part of the structure of the temple and the flexible circuit board in;

[0060] Fig.37 shows Fig.36 Schematic diagram of the structure of the temple housing with some parts omitted in;

[0061] Fig.38 shows Fig.11Partial structural schematic diagram of the middle frame and the flexible circuit board;

[0062] Fig.39 Shows Fig.11 Exploded schematic diagram of the smart glasses and the audio structure part;

[0063] Fig.40 Shows Fig.39 Cross-sectional view of the audio structure of the smart glasses;

[0064] Fig.41 Shows Fig.39 Cross-sectional view of the audio structure of the smart glasses;

[0065] Fig.42 Shows Fig.39 Cross-sectional view of the audio structure of the smart glasses;

[0066] Fig.43 Shows Fig.39 Schematic diagram of the structure with the back cover omitted;

[0067] Fig.44 Shows Fig.43 Schematic diagram of the structure with the sound generating device omitted;

[0068] Fig.45 Shows Fig.44 Schematic diagram of the structure with the carrier bracket omitted;

[0069] Fig.46 Shows Fig.39 Schematic diagram of the carrier bracket;

[0070] Among them, the above-mentioned drawings include the following reference numerals:

[0071] 110. Display device; 120. First lens; 130. First sub-lens; 140. Second sub-lens; 150. Prism; 151. First transmission surface; S4. Reflective surface; 152. Second transmission surface; 160. Mirror; 170. Third lens; 211. Inclined surface; 220. Coupling-in element; 230. Coupling-out element; 3. Compensation mirror; S7. The surface of the first lens on the side close to the display device; S6. The surface of the first lens on the side far from the display device; S5. The surface of the second lens on the side close to the display device; S3. The surface of the second lens on the side far from the display device; S2. The surface of the third lens on the side close to the display device; S1. The surface of the third lens on the side far from the display device; 100. Smart glasses; 10. Frame; 101. Installation chamber; 11. Rear frame; 111. Positioning protrusion; 12. Front frame; 13. Installation groove; 14. Adhesive surface; 15. Glue overflow surface; 16. Lens holder; 17. Bridging part; 171. Guide surface; 172. Second card slot; 173. Clamping groove; 18. First mating part; 181. Mating groove; 182. First card slot; 19. Second mating part; 191. Limit groove; 20. Waveguide; 21. Positioning slot; 22. Extension part; 23. Connection part; 30. Snap structure; 31. Tongue; 32. Card slot; 40. Temple; 41. Temple housing; 411. Activity chamber; 412. Installation chamber; 413. Through hole; 414. Wire passing hole; 415. Partition board; 416. End plate; 417. Wire passing channel; 42. Shielding part; 43. Electronic module; 44. Flexible circuit board; 45. Rotating shaft structure; 451. First pivoting part; 452. Second pivoting part; 46. Elastic member; 461. Abutting part; 462. Elastic part; 463. Abutting block; 50. Expansion lens assembly; 51. Expansion lens; 52. Clamping member; 521. Clamping slot; 523. Main body part; 524. Clamping part; 525. Connection slot; 526. Avoidance opening; 527. Clamping base; 528. Clamping convex part; 70. Nose pad; 73. Connection member; 731. First connection part; 732. Second connection part; 733. Block; 80. Optical engine module; 81. Optical engine housing; 811. Clamping protrusion; 812. Light outlet; 82. Optical bracket; 821. Third card slot; 822. First adhesive surface; 823. First glue overflow surface; 824. Positioning flange; 825. Light passing port; 826. Glue dispensing port; 90. Audio mechanism; 91. Main body; 901. Front shell; 902. Rear cover; 903. Connection section; 904. Arc section; 911. First side wall; 9111. Bottom wall; 9112. Top wall; 912. Second side wall; 9121. Inner side wall; 9122. Outer side wall; 913. Accommodation cavity; 9131. Front cavity; 9132. Rear cavity; 9133. Sound outlet hole; 9134. Sound leakage hole; 9135. Sound amplification channel; 914. Dust-proof net; 915. First retaining wall; 916. Second retaining wall; 92. Sound generating device; 93. Carrying bracket; 931. Installation area;932. Connecting holes; 94. Clamping structure; 941. Lock tongue; 942. Locking part; 943. Elastic arm; 95. Convex edge; 96. Positioning groove; 97. Positioning bump; Specific embodiments

[0072] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0073] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0074] In the present invention, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" usually refer to the directions shown in the drawings, or refer to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contours of the components themselves, but the above orientation words do not limit the present invention.

[0075] In order to solve the problems of large volume, heavy weight and non-compact structure existing in the existing optical engine module. The present invention provides an optical engine module, a near-eye display device, smart glasses and smart goggles.

[0076] As Figures 1 to 4 shown, the present invention provides an optical engine module 80. The optical engine module 80 includes a display device 110, a beam steering element and a beam shaping lens group. The display device 110 is used to emit a beam; the beam steering element is located on the light-emitting side of the display device 110. The beam emitted by the display device 110 and propagating in the first direction is deflected by the beam steering element and then propagates in the second direction. An angle is set between the first direction and the second direction; the beam shaping lens group is used to shape the beam. The beam shaping lens group includes a first lens 120, a second lens and a third lens 170. The first lens 120 is located between the display device 110 and the beam steering element. The third lens 170 is located on the light-emitting side of the beam steering element. The second lens is located between the first lens 120 and the third lens 170.

[0077] By setting the beam steering element to change the beam propagation direction, the optical path can be effectively folded, and the length dimension of the optical engine module 80 can be compressed, which is beneficial to improving the structural compactness of the optical engine module 80. At the same time, combined with the beam shaping effects of the first lens 120, the second lens, and the third lens 170, effective management and utilization of the beam can be achieved. In addition, the number of lenses used for shaping is saved, which is beneficial to reducing the overall weight of the optical engine module 80, thereby ensuring the light weight of the optical engine module 80 and improving the portability of the intelligent device to which it is applied. The application scenarios of the optical engine module 80 of the present application include but are not limited to smart glasses, smart goggles, etc., and are particularly suitable for occasions that require long-term wearing, such as military training, industrial maintenance, medical guidance, etc., reducing the burden on the wearer and improving the use comfort.

[0078] As Figures 1 to 4 shown, the beam steering element includes a reflection surface S4, and the included angle between the reflection surface S4 and the display device 110 is an acute angle. That is to say, the reflection surface S4 is inclined relative to the display device 110, and total internal reflection of light occurs on the reflection surface S4 to reduce light energy loss, which is beneficial to improving the light energy utilization rate.

[0079] As Figures 1 to 4 shown, in different alternative embodiments of the present application, the beam steering element is one of a reflecting mirror 160 and a prism 150. The second lens is composed of a first sub-lens 130 and a second sub-lens 140. The first sub-lens 130 and the second sub-lens 140 are separately arranged. The first sub-lens 130 is located between the first lens 120 and the beam steering element, and the second sub-lens 140 is located between the beam steering element and the third lens 170.

[0080] In Figures 1 to 3 a specific embodiment shown, the beam steering element is a prism 150. The prism 150 includes a first transmission surface 151, a reflection surface S4, and a second transmission surface 152 connected in sequence. The beam entering the prism 150 from the first transmission surface 151 is reflected by the reflection surface S4 and exits from the second transmission surface 152. The design principle of the prism 150 is to utilize the refraction and total internal reflection characteristics of light, and by refraction of the first transmission surface 151 and the second transmission surface 152 and total internal reflection of the reflection surface S4, the change of the beam path is realized.

[0081] Specifically, referring to Figure 1As shown, the prism 150 can be integrally formed with the second lens. Specifically, the first sub-lens 130 is integrally formed with the first transmission surface 151, and the second sub-lens 140 is integrally formed with the second transmission surface 152. By integrating the second lens with the prism 150, it is convenient to position the two, and at the same time, it can reduce the production and assembly difficulty of the optical engine module 80 and the complexity of the structural design, simplify the assembly process, and improve the assembly efficiency; at the same time, the air gap between the second lens and the prism 150 is eliminated, making the overall structure more compact and smaller in size. Alternatively, the prism 150 can be adhesively connected to the second lens. Specifically, the first sub-lens 130 is adhesively connected to the first transmission surface 151, and the second sub-lens 140 is adhesively connected to the second transmission surface 152. Such a setting can also achieve the compression of the volume of the optical engine module 80. The adhesive connection allows different parts of the prism 150 and the second lens to use different materials to meet their respective specific optical and mechanical performance requirements. At the same time, if a certain component in the prism 150 and the second lens is damaged or needs to be upgraded, the adhesive connection design allows the prism 150 or the second lens to be replaced separately without remanufacturing the entire component, reducing the maintenance cost; in addition, during the adhesive process, the performance of the optical system can be fine-tuned by controlling parameters such as the thickness and refractive index of the adhesive layer. Preferably, the first transmission surface 151, the second transmission surface 152, the surface of the first sub-lens 130 facing the first transmission surface 151, and the surface of the second sub-lens 140 facing the second transmission surface 152 are all flat, which is convenient for integrating the prism 150 with the second lens.

[0082] Specifically, referring to Figure 2 As shown, the prism 150 can also be spaced from the second lens. Specifically, the first sub-lens 130 is spaced from the first transmission surface 151 in the first direction, and the second sub-lens 140 is spaced from the second transmission surface 152 in the second direction. At this time, the first transmission surface 151 can be flat or curved, and the second transmission surface 152 can be flat or curved, which can be selected according to the actual situation. Preferably, both the first transmission surface 151 and the second transmission surface 152 are flat. At this time, the light beams emitted from each pixel point on the display device 110 pass through the first lens 120 and the first sub-lens 130 in sequence, then enter the interior of the prism 150 through the first transmission surface 151. The main ray direction of the on-axis field of view is perpendicular to the first transmission surface 151. If the first transmission surface 151 is curved, the main ray direction coincides with the optical axis of the first transmission surface 151. The light beam is totally reflected by the reflection surface S4 inside the prism 150 and then exits to the outside of the prism 150 after passing through the second transmission surface 152. At this time, the main ray direction of the light beam is perpendicular to the second transmission surface 152. If the second transmission surface 152 is curved, the main ray direction coincides with the optical axis of the second transmission surface 152. Further, the light beam is reshaped by the second sub-lens 140 and the third lens 170 in sequence and exits as parallel light. Figure 1 The line with an arrow can be regarded as a beam of light, and the arrow indicates the propagation direction of the light beam.

[0083] In Figure 4 In another specific embodiment shown, the beam steering element is a mirror 160, and the mirror 160 has a reflective surface S4. At this time, the first sub-lens 130 is located on the incident light side of the mirror 160, and the second sub-lens 140 is located on the outgoing light side of the mirror 160. At this time, the light beams emitted from each pixel point on the display device 110 are transmitted along the first direction, and after passing through the first lens 120 and the first sub-lens 130 in sequence, they are reflected by the mirror 160 and then transmitted along the second direction. After further passing through the second sub-lens 140 and the third lens 170 for reshaping in sequence, they are emitted as parallel light. The design principle of the mirror 160 is to utilize the high reflectivity of its surface to reflect the light beam from the first direction to the second direction, realizing the change of the light beam propagation path. The setting of the mirror 160 can reduce the overall weight. Optionally, in specific applications, a film can be coated on the reflective surface S4, specifically a silver reflective film or a dielectric reflective film, to further reduce the loss of light and ensure the light transmission efficiency.

[0084] In summary, in actual applications, the mirror 160 or the prism 150 can be selected as the beam steering element according to the actual situation. Preferably, the beam steering element is Figures 1 to 3 the prism 150 shown. After the light beams emitted from each pixel point on the display device 110 pass through the first lens 120 and the first sub-lens 130 in sequence, the light beams are totally reflected by the reflective surface S4 inside the prism 150 and then leave the prism 150. Compared with Figure 4 the case where the beam steering element is the mirror 160 shown, the total reflection transmission of the light beam by the reflective surface S4 inside the prism 150 can reduce the loss of light energy, improve the utilization efficiency of light energy, and has a simple structure without the need for coating.

[0085] In the preferred embodiment of the present application, the angle between the first direction and the second direction is a right angle. That is to say, the main light direction of the light beam emitted from the display module is perpendicular to the main light direction of the reflected light beam of the reflective surface S4. Such a setting makes the overall optical path trend and structural layout of the optical engine module 80 in an L shape. The design principle is to turn the light beam from the first direction to the second direction perpendicular to it through the beam steering element, realizing the efficient management and utilization of the light beam path. It is beneficial to make the structure of the optical engine module 80 more compact. Refer to Figure 1 shown in, the X-axis direction is the first direction, and the Y-axis direction is the second direction.

[0086] It should be noted that the beam shaping lens group is composed of the above-mentioned first lens 120, second lens, and third lens 170, and the first lens 120, second lens, and third lens 170 are jointly used to collimate the light beam emitted by the display device 110. The first lens 120 and the first sub-lens 130 are arranged along the first direction, and the second sub-lens 140 and the third lens 170 are arranged along the second direction. It can also be understood that the display device 110, the first lens 120, and the first sub-lens 130 are arranged along the first optical axis, the third lens 170 and the second sub-lens 140 are arranged along the second optical axis, and the first optical axis forms the second optical axis after being reflected on the reflection surface S4, and the first optical axis is perpendicular to the second optical axis.

[0087] It should also be noted that for the convenience of processing and production, the second lens is split into the first sub-lens 130 and the second sub-lens 140, and they can be integrally injection-molded with the prism 150 or glued together. Whether it is from the optical focal length or the optical modulation effect, the first sub-lens 130 and the second sub-lens 140 should be regarded as a whole of the second lens. That is to say, the focal length of the second lens specifically refers to the focal length of the second lens composed of the first sub-lens 130 and the second sub-lens 140. The first sub-lens 130 and the second sub-lens 140 are inseparable and cannot be optimized separately.

[0088] Specifically, the refractive indices of the first lens 120, second lens, and third lens 170 are all greater than 1.47 and less than or equal to 1.67. By controlling the refractive index and surface shape of each lens, optimizing the propagation path of the light beam inside each lens is beneficial to balancing the light aberration, reducing the loss of light energy, and improving the optical performance of the optical-mechanical module 80.

[0089] In an alternative embodiment of the present application, the first lens 120, second lens, and third lens 170 are all trimmed lenses. Here, it should be noted that the original first lens 120 to third lens 170 are all circular lenses. The first lens 120 to third lens 170 are trimmed along the optical axis direction where they are located, and the cutting direction is parallel to the optical axis direction of the lens. To make the image light beam output by the display device 110 undergo total internal reflection on the reflection surface S4, it is controlled that the aperture D of the trimmed lens and the total focal length fn of the optical-mechanical module 80 satisfy: 0 < D / fn ≤ 0.53. The aperture D of the trimmed lens here is actually the minimum aperture of the lens after the trimming process. If D / fn is greater than 0.53, it will cause the image light beam output by the display device 110 to not undergo total internal reflection on the reflection surface S4, and it is necessary to coat a film on the reflection surface S4. Compared with the total internal reflection method, the light energy utilization efficiency of the coating method is low.

[0090] In different embodiments of the present application, the value of the aperture D of the edge-cutting lens can be 5mm, 5.2mm, 5.4mm, 5.6mm, etc., the value of the total focal length fn of the optical engine module can be 10.5, 11.2, 12mm, 13mm, etc., and the value of D / fn can be 0.53, 0.48, 0.43, 0.38, etc.

[0091] Specifically, the optical engine module satisfies at least one of the following conditions:

[0092] The relationship between the focal length f1 of the first lens and the total focal length fn of the optical engine module satisfies: -7.8 ≤ f1 / fn ≤ 2.8.

[0093] The relationship between the focal length f2 of the second lens and the total focal length fn of the optical engine module satisfies: -8.1 ≤ f2 / fn ≤ 4.9.

[0094] The relationship between the focal length f3 of the third lens and the total focal length fn of the optical engine module satisfies: 1.5 ≤ f3 / fn ≤ 2.5.

[0095] By reasonably planning the ratio range of the focal lengths of each lens to the total focal length of the optical engine module, it is beneficial to the reasonable distribution of the focal lengths of each lens, thereby facilitating the collimation of the light beam by each lens, reducing the divergence angle of the light beam, optimizing the propagation path of the light beam inside the optical engine module, reducing the loss of light energy, and improving the optical performance of the optical engine module.

[0096] Preferably, -7.61 ≤ f1 / fn ≤ 2.65, -7.93 ≤ f2 / fn ≤ 4.78, 1.54 ≤ f3 / fn ≤ 2.30.

[0097] Optionally, the surface profile of the first lens can be set to one of a spherical surface, an aspherical surface, and a freeform surface, the surface profile of the second lens can be set to one of a spherical surface, an aspherical surface, and a freeform surface, and the surface profile of the third lens can be set to one of a spherical surface, an aspherical surface, and a freeform surface, which can be set according to actual needs. Preferably, the surface profiles of the first lens, the second lens, and the third lens are all aspherical surfaces, so that spherical aberration can be better corrected while reducing the overall weight, ensuring the quality of the output image.

[0098] Specifically, by planning that there are three lenses for beam shaping in the optical engine module of the present application, and planning that the first lens is located between the second lens and the display, compared with the first lens being located between the second lens and the third lens, on the one hand, it can reduce the length of the optical engine module in the second direction and reduce the pressure on the human face during actual use. On the other hand, it can enable the first lens to receive more image beams from the display device with a relatively small size. Because under the same conditions, if the first lens is located between the second lens and the third lens, the path of the image beams output by the display device passes through the second lens and the beam steering element, and the divergence range of the light rays becomes larger as it is transmitted further. At this time, if the first lens is to receive as many image beams as possible, its size must be large enough, and a large-sized lens will result in an increase in the overall volume of the optical engine module, which is not conducive to structural compactness and small size. Therefore, such an arrangement in the present application can not only save the number of lenses and reduce production costs, but also ensure structural compactness while correcting system aberrations.

[0099] Three examples of the beam shaping lens group applicable to the present application are shown below.

[0100] Example 1

[0101] Table 1 below shows the basic structural parameter table of the beam shaping lens group in Example 1. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). In the following table, the lens surface close to the display device is marked as S7, and so on. From the display device to the light output side of the optical engine module, the surfaces of each lens are sequentially marked as S7, S6, S5, S4, S3, S2, S1. Among them, S4 represents the reflective surface.

[0102] Table 1

[0103]

[0104] As can be seen from the above table, the focal length f1 of the first lens is 24.7 mm, the focal length f2 of the second lens is -80.1 mm, and the focal length f3 of the third lens is 24.1 mm.

[0105] In this example, the surface S7 on the side of the first lens close to the display device is concave, and the surface S6 on the side of the first lens far from the display device is convex. The surface S5 on the side of the second lens close to the display device is concave, and the surface S3 on the side of the second lens far from the display device is convex. The surface S2 on the side of the third lens close to the display device is concave, and the surface S1 on the side of the third lens far from the display device is convex.

[0106] In this example, the surfaces of each of the first lens to the third lens are all aspherical surfaces, and the surface profiles of the aspherical surfaces can be defined by, but not limited to, the following aspherical formula:

[0107] Formula (1).

[0108] Where x is the sagitta, the distance from the vertex of the aspheric surface to the aspheric surface along the optical axis at a position with a height of h; c is the paraxial curvature of the aspheric surface, c = 1 / R, that is, the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; Ai is the correction coefficient of the i-th order of the aspheric surface. Table 2 below gives the higher-order term coefficients that can be used for each aspheric surface S1 - S7 in Example 1.

[0109] Table 2

[0110]

[0111] This example can effectively reduce aberrations such as distortion and astigmatism of the system, improve the image quality, and the field of view angle can reach 30°.

[0112] Example 2

[0113] Table 3 below shows the basic structural parameter table of the beam shaping lens group in Example 2. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). In the following table, the lens surface close to the display device is marked as S7, and so on. From the display device to the light output side of the opto-mechanical module, the surfaces of each lens are sequentially marked as S7, S6, S5, S4, S3, S2, S1. Among them, S4 represents the reflective surface.

[0114] Table 3

[0115]

[0116] As can be seen from the above table, the focal length f1 of the first lens is 27.8 mm, the focal length f2 of the second lens is -83.3 mm, and the focal length f3 of the third lens is 20 mm.

[0117] In this example, the surface S7 on the side of the first lens close to the display device is concave, and the surface S6 on the side of the first lens far from the display device is convex. The surface S5 on the side of the second lens close to the display device is concave, and the surface S3 on the side of the second lens far from the display device is convex. The surface S2 on the side of the third lens close to the display device is concave, and the surface S1 on the side of the third lens far from the display device is convex.

[0118] In this example, the surfaces of each of the first to third lenses are all aspheric surfaces.

[0119] Table 4 below gives the higher-order term coefficients that can be used for each aspheric surface S1 - S7 in Example 2.

[0120] Table 4

[0121]

[0122] This example can effectively reduce aberrations such as system distortion and astigmatism, improve image quality, and the field of view angle can reach 25°.

[0123] Example 3

[0124] Table 5 below shows the basic structural parameter table of the beam shaping lens group in Example 3. Among them, the units of the radius of curvature, thickness / distance, and focal length are all millimeters (mm). In the following table, the lens surface close to the display device is marked as S7, and so on. From the display device to the light output side of the optical engine module, the surfaces of each lens are sequentially marked as S7, S6, S5, S4, S3, S2, S1. Among them, S4 represents the reflecting surface.

[0125] Table 5

[0126]

[0127] As can be seen from the above table, the focal length f1 of the first lens is -79.9 mm, the focal length f2 of the second lens is 50.2 mm, and the focal length f3 of the third lens is 22.1 mm.

[0128] In this example, the surface S7 of the first lens close to the display device is concave, and the surface S6 of the first lens far from the display device is convex. The surface S5 of the second lens close to the display device is concave, and the surface S3 of the second lens far from the display device is convex. The surface S2 of the third lens close to the display device is concave, and the surface S1 of the third lens far from the display device is convex.

[0129] In this example, the surfaces of the first lens to the third lens are all aspherical surfaces.

[0130] Table 6 below gives the higher-order term coefficients that can be used for each aspherical surface S1 - S7 in Example 3.

[0131] Table 6

[0132]

[0133] This example can effectively reduce aberrations such as system distortion and field curvature, improve image quality, and the field of view angle can reach 28°. At the same time, due to the adoption of the "positive - positive - negative" optical power distribution architecture, the front group with positive optical power and the rear group with negative optical power are separated, which is beneficial to the compression of the system length. Compared with the other two embodiments, the structure is more compact.

[0134] In summary, the optical power of the first lens 120 of this application can be positive or negative, the optical power of the second lens can be positive or negative, and the third lens 170 has positive optical power. The field of view angle of the optical engine module 80 is greater than or equal to 25° and less than or equal to 30°.

[0135] Specifically, the display device 110 includes one of a Micro-OLED chip, a Micro-LED chip, an LCoS chip, an LCD chip, an OLED chip, and a DMD chip. By selecting different types of display devices 110, the requirements in different application scenarios are met, and the versatility and adaptability of the optical engine module 80 are improved.

[0136] As Figures 5 to 7 shown, the present invention further provides a near-eye display device. The near-eye display device includes the above-mentioned optical engine module 80 and a waveguide display module. The waveguide display module includes a waveguide 20 and an input coupling element 220 and an output coupling element 230 disposed on the waveguide 20. The light beam emitted by the optical engine module 80 is introduced into the waveguide 20 through the input coupling element 220, and after total internal reflection transmission in the waveguide 20, it is emitted to the human eye through the output coupling element 230.

[0137] In Figure 5 an optional embodiment shown, by selecting the above-mentioned optical engine module 80 for the near-eye display device of the present application, it is beneficial to compress its size in the length direction, and the display device 110 is disposed perpendicular to the waveguide 20, which is more beneficial to the compactness of the structure and the convenience of actual assembly. The parallel light beam output by the optical engine module 80 is coupled into the waveguide 20 through the input coupling element 220, and undergoes total internal reflection propagation in the waveguide 20, and then is coupled out by the output coupling element 230 and enters the human eye to form a virtual image.

[0138] Specifically, both the input coupling element 220 and the output coupling element 230 are angular multiplexing gratings, and the angular multiplexing gratings are fabricated based on the angular multiplexing technology. The image light beam incident on the waveguide 20 is divided into multiple angular intervals, and the ranges of the multiple angular intervals are equal or unequal. The input coupling element 220 is divided into multiple input grating regions, and the output coupling element 230 is divided into multiple output grating regions. The multiple input grating regions correspond to the multiple output grating regions one by one. Each input grating region is used to couple the image light beam in the corresponding angular interval into the waveguide 20, and each output grating region is used to receive the light beam in the corresponding angular interval transmitted from the corresponding input grating region. The angular interval of the image light beam incident on the waveguide display module is greater than or equal to 20° and less than or equal to 30°, preferably 25°.

[0139] Reference Figure 6As shown, both the input element 220 and the output element 230 are angularly multiplexed volume holographic gratings. The holographic film is exposed by holographic exposure to obtain a volume holographic grating. During the process of fabricating the volume holographic grating, a holographic film is exposed N times with a beam of the same wavelength at N different exposure angles to fabricate an angularly multiplexed volume holographic grating. In this application, N is preferably 3. That is to say, the input element 220 is divided into three input grating regions, and the output element 230 is divided into three output grating regions. The first input grating region is used to couple in the first beam within the first angular range, and make the first beam propagate in the waveguide 20 by total internal reflection to the first output grating region, and then be coupled out to the human eye through it; the second input grating region is used to couple in the second beam within the second angular range, and make the second beam propagate in the waveguide 20 by total internal reflection to the second output grating region, and then be coupled out to the human eye through it; the third input grating region is used to couple in the third beam within the third angular range, and make the third beam propagate in the waveguide 20 by total internal reflection to the third output grating region, and then be coupled out to the human eye through it.

[0140] Optionally, the angular range of response of each input grating region can be the same or different, and can be set according to the actual situation.

[0141] Of course, in actual applications, to achieve large field of view display, it is also possible not to adopt the method of fabricating an angularly multiplexed grating by multi-angle exposure described in this application. For example, stacking multiple separately exposed gratings on top of each other from top to bottom can also achieve the effect of large field of view display. However, compared with the method of this application, the operation is more complex, and the alignment problem of multiple gratings needs to be considered.

[0142] As Figure 5 shown, the input element 220 and the output element 230 are arranged at intervals on the same side surface of the waveguide 20, and the input element 220 and the output element 230 are located on the side of the waveguide 20 away from the optical engine module 80. By arranging the input element 220 and the output element 230 on the same side of the waveguide 20, there is no need to consider the element layout and the optical path direction on both sides of the waveguide 20 during the optical path design, making the overall optical path more concise. At the same time, the physical obstacles and unnecessary optical path turns on the beam transmission path are reduced, thereby reducing the loss of the beam during transmission, improving the optical efficiency, and ensuring the brightness and clarity of the final image. At the same time, it ensures that the relative position relationship between the optical engine module 80 and the waveguide 20 is more suitable for actual applications.

[0143] Specifically, the periods of the input element 220 and the output element 230 are the same. By using an angularly multiplexed grating to expand the angular bandwidth of the grating, the incident beams within the field of view angle can be coupled into the waveguide 20 with relatively high and balanced diffraction efficiency. At the same time, the volume of the optical waveguide display module can be controlled more effectively, and the implementation scheme is simple.

[0144] In Figure 7 In another optional embodiment shown, the coupling element 220 is a coupling grating, which can be a volume holographic grating; the coupling element 230 is a coupling grating, which can be a volume holographic grating; the coupling grating is arranged on a side surface of the waveguide 20 away from the optical-mechanical module 80, the waveguide 20 has an inclined surface 211, the inclined surface 211 and a side surface of the waveguide 20 are arranged at an acute angle or an obtuse angle, and a group of opposite sides of the inclined surface 211 are respectively connected to the two side surfaces of the waveguide 20, and the coupling grating is arranged on the inclined surface 211. Optionally, the coupling grating and the coupling grating can be angle multiplexing gratings, or ordinary gratings without angle multiplexing function.

[0145] Specifically, the optical waveguide display module further includes a compensation mirror 3, the compensation mirror 3 is bonded to the inclined surface 211 of the waveguide 20, and the outcoupling grating is sandwiched between the inclined surface 211 of the waveguide 20 and the compensation mirror 3. The compensation mirror 3 is used to allow external light to enter the human eye normally, thereby preventing the human eye from observing a distorted external scene. The external light passes through the compensation mirror 3, the outcoupling grating and the waveguide 20 successively to enter the human eye. The compensation mirror 3, the waveguide 20 and the outcoupling grating form an integral device, which can be equivalent to a flat glass, thereby preventing the human eye from observing a deformed and distorted external scene.

[0146] like Figure 8 , Figure 11-18 and Figure 31-33 As shown, the present invention further provides a smart glasses, including a frame 10 and the above-mentioned near-eye display device, the frame 10 includes a front frame 12 and a rear frame 11, and the waveguide 20 of the near-eye display device is installed between the front frame 12 and the rear frame 11; the smart glasses also include an optical machine housing 81 and an optical bracket 82, the optical machine housing 81 is arranged in the frame 10, and is used to fix the optical machine module 80 of the near-eye display device, and the optical machine housing 81 is installed on the waveguide 20 through the optical bracket 82. In addition, the display device 110 of the optical machine module 80 is perpendicular to the waveguide 20 of the optical waveguide display module.

[0147] like Fig. 9 As shown, the present invention also provides a smart swimming goggle, including a frame 10 and the above-mentioned near-eye display device, wherein the optical-mechanical module 80 and the optical waveguide display module of the near-eye display device are both arranged in the frame 10, and the coupling element 220 of the optical waveguide display module is the surface of the waveguide 20, and the surface is a plane or a curved surface, and the curved surface includes a spherical surface and an aspherical surface. The surface is arranged to be inclined to the upper and lower surfaces of the waveguide 20, and specifically, the surface and the surface of one side of the waveguide 20 form an acute angle or an obtuse angle. The coupling-out element 230 is a volume holographic grating. At this time, the display device 110 of the optical-mechanical module 80 is not parallel to the waveguide 20, and the display device 110 and the waveguide 20 are arranged at an acute angle or an obtuse angle.

[0148] In this embodiment, the volume holographic grating is a planar device with a focal power, which is used to diffract the target light incident on its surface, and can independently change the outgoing directions of the light rays with different incident angles in the target light. Its two side surfaces can be adhesively connected to the inclined surface 211 of the waveguide 20 and the compensating mirror 3 respectively. The holographic volume grating can have wavelength selectivity and angle selectivity, and can diffract the light rays with specific wavelengths and specific angles with high efficiency, while transmitting the light rays at other angles with high efficiency. Compared with a beam splitter with a certain ratio of reflectivity to transmittance, it can achieve a brighter image display and more efficient transmission of external light. By modulating the incident light field, the volume holographic grating can obtain a light field with an arbitrary intensity distribution on the far-field imaging plane.

[0149] As Fig.11 and Fig.18 shown, the frame 10 of the smart glasses 100 includes a rear frame 11 and a front frame 12, and the front frame 12 is installed on the rear frame 11. Among them, at least part of the outer edge of the waveguide 20 is located between the front frame 12 and the rear frame 11. One of the waveguide 20 and the frame 10 is provided with a positioning protrusion 111, and the other is provided with a positioning groove 21 that cooperates with the positioning protrusion 111.

[0150] When part of the outer edge of the waveguide 20 is located between the front frame 12 and the rear frame 11, it can be understood that the front frame 12 and the rear frame 11 are of a semi-frame structure; when all the outer edges of the waveguide 20 are located between the front frame 12 and the rear frame 11, it can be understood that the front frame 12 and the rear frame 11 are of a full-frame structure. Preferably, the front frame 12 and the rear frame 11 of the present application are of a semi-frame structure. As Figures 11 to 15 exemplarily shows the case where the front frame 12 and the rear frame 11 are of a semi-frame structure. Compared with the full-frame structure, the semi-frame structure can reduce the overall weight of the smart glasses, facilitate the user to wear, reduce the pressure and discomfort during wearing, and at the same time look lighter in terms of visual effect.

[0151] When assembling the waveguide 20 to the frame 10, it is only necessary to align the positioning groove 21 with the positioning protrusion 111, so as to be able to position the position of the waveguide 20 on the frame 10 without complex adjustment and alignment operations. The settings of the positioning protrusion 111 and the positioning groove 21 achieve rapid and accurate positioning of the installation of the waveguide 20, simplify the assembly process, and improve the assembly efficiency.

[0152] In this embodiment, as Figures 11 to 17As shown, the specific functions of the smart glasses 100 are not strictly limited. Reference can be made to the prior art and will not be elaborated further herein. For example, the smart glasses 100 integrate multiple functions such as displaying information, navigation, taking pictures, etc. The number of waveguides 20 in the smart glasses 100 is two, and both waveguides 20 are installed on the frame 10. The waveguide 20 is a key component in the smart glasses 100 and is responsible for guiding the image light to the user's eyes. In addition, the smart glasses 100 include two temple arms 40, and both temple arms 40 are installed on the frame 10. The temple arms 40 can be connected to the frame 10 by means of screws, buckles or rotating shafts, etc.

[0153] In this embodiment, as Figures 11 to 16 shown, when the user wears the smart glasses 100, the rear frame 11 is closer to the user's face relative to the front frame 12. The structures of the front frame 12 and the rear frame 11 are not strictly limited as long as they can fix and support the waveguide 20.

[0154] In this embodiment, as Figures 11 to 16 shown, an installation groove 13 for installing the waveguide 20 is formed between the front frame 12 and the rear frame 11, so that the waveguide 20 can be embedded between the front frame 12 and the rear frame 11 to form a stable assembly structure. Among them, the front frame 12 and the rear frame 11 semi-wrap the waveguide 20 to further fix the waveguide 20 and prevent it from shifting or falling off during use.

[0155] In this embodiment, as Figures 11 to 18 shown, the front frame 12 and the rear frame 11 are fixed by clamping and / or gluing. For example, a buckle structure 30 is configured between the front frame 12 and the rear frame 11, and the buckle structure 30 facilitates the disassembly and assembly of the front frame 12 and the rear frame 11. Among them, the structure of the buckle structure 30 can refer to the prior art. For example, the buckle structure 30 includes a card slot 32 and a tongue 31 that can be inserted into the card slot 32, and the card slot 32 and the tongue 31 are respectively arranged on the front frame 12 and the rear frame 11. Another example is that one of the front frame 12 and the rear frame 11 is provided with a glue groove, and the other is provided with a card post. The card post is inserted into the glue groove and fixed by dotting glue to realize the assembly of the front frame 12 and the rear frame 11.

[0156] In this embodiment, as Figures 11 to 16 shown, the waveguide 20 is fixed between the front frame 12 and the rear frame 11 by gluing, ensuring a tight fit and stable connection between the waveguide 20 and the front frame 12 and the rear frame 11, and also enhancing the stable connection between the front frame 12 and the rear frame 11.

[0157] In this embodiment, as Figures 11 to 16As shown, at least one of the front frame 12 and the rear frame 11 has an adhesive surface 14, and the adhesive surface 14 and the waveguide 20 are bonded together by dispensing glue. The bonding of the adhesive surface 14 and the waveguide 20 ensures the stable position of the waveguide 20 during the installation process and prevents it from shifting during assembly or use.

[0158] In this embodiment, as Figures 11 to 16 shown, at least one of the front frame 12 and the rear frame 11 has an overflow surface 15. There is a gap between the overflow surface 15 and the waveguide 20, so that the excess glue during the dispensing assembly process of the waveguide 20 and the adhesive surface 14 can enter the overflow surface 15, preventing the glue from overflowing to unnecessary places and affecting the assembly and performance of the smart glasses. The overflow surface 15 is used to be further fixed to the waveguide 20 through the excess overflowing glue. This design not only enhances the connection strength between the waveguide 20 and the frame, but also makes the fixing process simpler and more efficient. Through the cooperation of the adhesive surface 14 and the overflow surface 15, the stable installation of the waveguide 20 is achieved, while ensuring a good display effect and user experience.

[0159] In this embodiment, as Figures 11 to 16 shown, both the front frame 12 and the rear frame 11 have an adhesive surface 14; the adhesive surface 14 on the front frame 12 and the adhesive surface 14 on the rear frame 11 are located on both sides of the waveguide 20 respectively; further enhancing the connection strength and stability between the waveguide 20 and the frame. Through the dual support and fixation of the front frame 12 and the rear frame 11, the waveguide 20 is less likely to shift or deform during installation and use. The method of fixing the waveguide 20 by adhesive between the front frame 12 and the rear frame 11 simplifies the assembly process of the smart glasses 100 and makes the connection between the front frame 12 and the rear frame 11 simpler and more efficient.

[0160] In this embodiment, as Figures 11 to 16 shown, both sides of the waveguide 20 are fixed to the front frame 12 and the rear frame 11 by adhesion respectively, and the connection strength between the front frame 12 and the rear frame 11 is significantly improved, thus ensuring the structural stability and durability of the entire smart glasses 100.

[0161] In this embodiment, as Figures 15 to 17 shown, the waveguide 20 has an outwardly convex extension 22, and the extension 22 is a positioning protrusion 111 or a positioning groove 21 is formed in the extension 22. The setting of the extension 22 can ensure the integrity of the glue running along the edge of the waveguide 20.

[0162] In this embodiment, as Figures 11 to 17As shown, the positioning groove 21 is a hole structure penetrating through the waveguide 20, a recessed structure formed by a recess in the side wall of the waveguide 20, or a recessed structure formed by a recess in the rear frame 11. The positioning protrusion 111 is integrally provided with the rear frame 11 or the waveguide 20, so as to enhance the structural strength of the positioning protrusion 111 and the rear frame 11 or the waveguide 20, and reduce the processing difficulty of the positioning protrusion 111 and the rear frame 11 or the waveguide 20. Of course, in other embodiments, the positioning protrusion 111 may also be integrally provided with the front frame 12.

[0163] In this embodiment, as Figure 12 to Figure 13 shown, there is no strict limit on the number of the positioning protrusions 111 and the positioning grooves 21; for example, the number of both the positioning protrusions 111 and the positioning grooves 21 is 1, 2, 3, or 4. A plurality of positioning grooves 21 are arranged at intervals around the circumference of the waveguide 20, and each positioning protrusion 111 can extend into the corresponding positioning groove 21 respectively. By increasing the number of the positioning grooves 21 and the positioning protrusions 111 and arranging them at intervals around the circumference of the waveguide 20, the stability and reliability of the assembly of the waveguide 20 can be further improved. This design of multiple positioning grooves 21 and multiple positioning protrusions 111 can prevent the waveguide 20 from rotating or displacing during the assembly process, and ensure its correct alignment and fixation with the front frame 12 and the rear frame 11. Of course, in other embodiments, as Figure 16 to Figure 17 shown, the number of the extension parts 22 on the waveguide 20 is two. One of the extension parts 22 is provided with a positioning groove 21, and the other extension part 22 is a positioning protrusion 111; the rear frame 11 has a positioning groove 21 and a positioning protrusion 111. Among them, the positioning groove 21 on the waveguide 20 cooperates with the positioning protrusion 111 on the rear frame 11; the positioning groove 21 on the rear frame 11 cooperates with the positioning protrusion 111 on the waveguide 20.

[0164] As Figures 11 to 18 shown, the present application also provides a smart glasses 100, including a frame 10 and a waveguide 20. The frame 10 includes a rear frame 11 and a front frame 12 mounted on the rear frame 11; a part of the outer edge of the waveguide 20 is positioned and installed between the front frame 12 and the rear frame 11, so that the frame 10 wraps the outer edge of the waveguide 20; wherein, along the outer edge direction of the waveguide 20, the wrapping range of the outer edge of the waveguide 20 by the frame 10 does not exceed two-thirds of its outer edge, so as to reduce the weight of the frame 10.

[0165] Compared with the case where the outer edge of the waveguide 20 is completely wrapped by the frame 10, in the present application, a part of the outer edge of the waveguide 20 is wrapped by the frame 10. Since part of the frame material is reduced, the weight is lighter. The lighter weight can reduce the burden on the nose bridge and ears and improve the wearing comfort; the (lower) part of the waveguide 20 not wrapped by the frame 10 can reduce the occlusion of the user's line of sight by the frame edge without the limitation of the frame, and can provide a wider lower field of view for the user, enabling the user to more naturally focus on the fusion of the real world and virtual information.

[0166] In this embodiment, as Figures 11 to 46 shown, the specific functions of the smart glasses 100 are not strictly limited, and reference can be made to the prior art, which will not be further elaborated herein; for example, the smart glasses 100 integrate multiple functions, such as displaying information, navigation, taking pictures, etc. The number of waveguides 20 in the smart glasses 100 is at least one; the waveguide 20 is a key component in the smart glasses 100 and is responsible for guiding the image light to the user's eyes.

[0167] In this embodiment, as Figures 11 to 46 shown, the smart glasses 100 include two temple arms 40, and both temple arms 40 are mounted on the frame 10. The temple arms 40 can be connected to the frame 10 by means of screws, buckles or rotating shafts, etc. Among them, the temple arms 40 are generally in a rod-shaped structure, so that the temple arms 40 have a length direction in space. The number of temple arms 40 is two, and the two temple arms 40 are respectively located on both sides of the frame 10. Among them, when the temple arms 40 rotate relative to the frame 10, the smart glasses 100 have an unfolded state and a folded state. A perforation for threading a strap is provided at the tail of the temple arm 40; by providing a perforation at the tail of the temple arm 40, the user can pass the strap through the hole and fix it on the smart glasses 100. During use, the strap is fixed to the back of the user's head. On the one hand, it can reduce the load on the ears, and on the other hand, it can effectively prevent the smart glasses 100 from accidentally falling off during use, especially in sports, strenuous activities or special use scenarios, and improve the wearing stability of the smart glasses 100. In other embodiments, a heart rate sensor is provided on the temple arm 40. The heart rate sensor can be integrally provided on the temple arm or detachably provided on the temple arm. Preferably, the heart rate sensor is provided at the tail of the temple arm 40.

[0168] In this embodiment, as Figures 11 to 46As shown in the figure, the spectacle frame 10 includes two lens holders 16 and a bridge portion 17 connecting the two lens holders 16; two temple arms 40 are respectively mounted on the corresponding lens holders 16. The structure of the lens holder 16 is not strictly limited as long as the lens holder 16 can carry the waveguide 20; for example, the lens holder 16 has an annular structure or a semi-annular structure and is disposed around the outer periphery of the waveguide 20. The structure of the bridge portion 17 is not strictly limited as long as the bridge portion 17 connects the two lens holders 16; for example, the bridge portion 17 generally has a strip-like structure. One or more sensors may be provided on the bridge portion 17; for example, a geomagnetic sensor, an accelerometer, and a gyroscope are provided inside the bridge portion 17. The accelerometer and the gyroscope are used to collect the acceleration and angular velocity information of the user's head, such as the acceleration and angular velocity of the head, so as to infer the motion posture and action trajectory of the wearer; the geomagnetic sensor can detect the intensity and direction of the earth's magnetic field. During activities such as hiking, mountain climbing, and cycling outdoors, the wearer can determine the traveling direction through the geomagnetic sensor on the smart glasses 100. In addition, a UV sensor may be provided on the surface of the bridge portion 17, and the UV sensor is used to monitor the environmental UV intensity and provide a UV protection reminder for the wearer.

[0169] In this embodiment, as Figure 11 to Figure 12 shown, the spectacle frame 10 has a semi-rimless structure; the bottom of the spectacle frame 10 does not wrap the waveguide 20, so that the lens holder 16 in the spectacle frame 10 generally has a C-shaped structure. Preferably, along the outer edge direction of the waveguide 20, the wrapping range of the spectacle frame 10 on the outer edge of the waveguide 20 does not exceed one-half of its outer edge, and the weight of the spectacle frame 10 can be reduced by at least more than 35%.

[0170] In this embodiment, as Figures 11 to 18 shown, one of the waveguide 20 and the spectacle frame 10 is provided with a positioning protrusion 111, and the other is provided with a positioning groove 21 that cooperates with the positioning protrusion 111. Among them, the structure of the spectacle frame 10 and the specific connection manner between the spectacle frame 10 and the waveguide 20 both adopt the descriptions in the above embodiments and will not be further elaborated here.

[0171] In this embodiment, as Figures 19 to 24 shown, the smart glasses 100 further include at least one expansion lens assembly 50. The expansion lens assembly 50 includes an expansion lens 51 and a clamping member 52. The expansion lens 51 can be clamped to the spectacle frame 10 through the clamping member 52. The smart glasses 100 and the expansion lens assembly 50 can be separately designed, which can reduce the maintenance cost and improve the upgrade flexibility. The user can replace or upgrade the expansion lens assembly 50 according to needs without replacing the entire device. This design reduces material waste and can be customized for different functional requirements, improving the market adaptability of the product.

[0172] In this embodiment, as Figures 19 to 22As shown, when the expansion lens 51 is a light-shielding lens, the light-shielding lens is located on the front side of the frame 10 (from the perspective of the user, that is, the light-shielding lens is located on the side of the frame away from the user). During actual use, light-shielding lenses with different light transmittances can be replaced according to the ambient light to enhance the user experience.

[0173] In this embodiment, as Figure 23 to Figure 25 shown, when the expansion lens 51 is a corrective lens, it can be arranged opposite to the waveguide 20; so that the smart glasses 100 can provide vision correction while also providing augmented reality or other visual assistance functions. Specifically, when the smart glasses 100 are augmented reality glasses, the corrective lens can be arranged inside the waveguide 20, enabling the user to see both the real environment and the augmented reality display; of course, the corrective lens can also be arranged outside the waveguide 20, allowing the user to see the real environment.

[0174] In other embodiments, as Figure 23 to Figure 24 shown, when the number of expansion lens assemblies 50 is two, one of the expansion lenses 51 is a light-shielding lens and the other expansion lens 51 is a corrective lens. The light-shielding lens is located on the front side of the frame 10, and the corrective lens is located on the rear side of the frame 10.

[0175] In this embodiment, as Figures 19 to 24 shown, the clamping member 52 can be clamped to the bridging portion 17. At this time, without additional components for the smart glasses 100, the bridging portion 17 can be clamped to the clamping member 52, which can reduce the cost of the smart glasses 100. The expansion lens 51 can be quickly and stably clamped to the bridging portion 17 through the clamping member 52, and the expansion lens assembly 50 can be stably assembled on the smart glasses 100, facilitating the user to easily install or remove the expansion lens 51 on the smart glasses 100. When the expansion lens assembly 50 is assembled on the smart glasses 100, the force application point of the expansion lens assembly 50 and the force receiving point of the smart glasses 100 are concentrated at the middle position, ensuring the stability of the smart glasses 100.

[0176] In this embodiment, as Figures 19 to 24 shown, the shape of the clamping member 52 is not strictly limited as long as the clamping member 52 can be clamped and fixed to the bridging portion 17. The clamping member 52 is made of non-magnetic material to avoid interference with the geomagnetic sensor in the smart glasses 100. Further preferably, the clamping member 52 is made of non-metallic material. The non-metallic material helps to reduce the overall weight and improve the wearing comfort, which is particularly important for the smart glasses 100 for long-term wearing; in addition, the non-metallic material has good elasticity and durability, making it more convenient for the user to install or remove the expansion lens 51, and also enabling it to adapt to different sizes of the bridging portion 17 to ensure a tight fit between the clamping member 52 and the bridging portion 17. For example, the clamping member 52 can be plastic, rubber, etc.

[0177] In this embodiment, as Figures 19 to 22 shown, the clamping member 52 has a connection groove 525, and a part of the structure of the expansion lens 51 is located in the connection groove 525 and is fixed by clamping or bonding. Preferably, the expansion lens 51 can be fixed in the connection groove 525 of the clamping member 52 by an adhesive to ensure its stability and durability. This fixing method is both firm and concealed and does not affect the appearance of the smart glasses 100. The clamping member 52 has an avoidance opening 526, and the avoidance opening 526 exposes the ultraviolet sensor located on the bridging portion 17; it is ensured that the expansion lens assembly 50 does not affect the normal operation of other functional modules.

[0178] In this embodiment, as Figures 19 to 22 shown, the clamping member 52 is generally in a C-shaped structure. The clamping member 52 has a clamping groove 521, and the clamping groove 521 can cooperate with the bridging portion 17 so that the clamping member 52 is clamped to the bridging portion 17. Only by applying force to the clamping member 52 to deform the clamping member 52 can the bridging portion 17 be taken out of or put into the clamping groove 521. The shape and size of the clamping groove 521 match those of the bridging portion 17 to ensure that the clamping member 52 can be firmly fixed to the bridging portion 17.

[0179] In this embodiment, as Figures 19 to 22 shown, the wall of the clamping groove 521 is generally in a C-shaped structure. This design not only ensures the structural stability, effectively preventing the expansion lens 51 from detaching from the bridging portion 17, but also facilitates the installation and disassembly of the expansion lens 51; in addition, this structure not only facilitates the entry and exit of the bridging portion 17, but also provides a certain elastic pressure after clamping to ensure the tight fit between the clamping member 52 and the bridging portion 17. The clamping groove 521 has an opening for the bridging portion 17 to enter and exit, and the opening is arranged facing away from the expansion lens 51. The C-shaped structure design of the clamping member 52 enables it to closely fit the bridging portion 17 while leaving an opening for the entry and exit of the bridging portion 17.

[0180] In this embodiment, as Figures 19 to 22 shown, the clamping member 52 includes a main body portion 523 and two clamping portions 524. The two clamping portions 524 are respectively located on both sides of the main body portion 523 and extend towards each other to jointly enclose the clamping groove 521, and an opening for the bridging portion 17 to enter and exit is formed between the two clamping portions 524. The main body portion 523 serves as the support structure of the clamping member 52 and has sufficient strength and stiffness to ensure the stable installation of the expansion lens assembly 50; an opening for the bridging portion 17 to enter and exit is formed between the two clamping portions 524.

[0181] In this embodiment, as Figures 19 to 22As shown, the bridging portion 17 has a guiding surface 171 for guiding the snap-in portion 524 to snap in. This design improves the accuracy and convenience of installation. The guiding surface 171 can be designed in shapes such as an inclined surface or a curved surface, so as to guide the snap-in portion 524 to smoothly snap into the bridging portion 17 during the installation of the snap-in member 52. The addition of the guiding surface 171 enables the user to easily complete the installation of the snap-in member 52 without precise alignment, greatly improving the installation efficiency. Among them, there are two guiding surfaces 171, and the two guiding surfaces 171 are respectively located on the opposite sides of the bridging portion 17, and the two guiding surfaces 171 can respectively guide the snap-in portion 524 to smoothly snap into the bridging portion 17.

[0182] Of course, in other embodiments, as Figure 23 to Figure 24 As shown, the bridging portion 17 has a second card slot 172, and the snap-in member 52 is snap-connected to the second card slot 172 so that the expansion lens 51 is snap-connected to the lens frame 10. At this time, without providing additional components for the smart glasses 100, the bridging portion 17 can be snap-connected to the snap-in member 52, which can reduce the cost of the smart glasses 100. At least a part of the snap-in member 52 can extend into the second card slot 172 and is snap-connected to the second card slot 172. Specifically, the snap-in member 52 includes a snap-in base 527 and a snap-in protrusion 528 located on one side of the snap-in base 527; a snap-in groove 173 is formed on the inner wall of the second card slot 172; when the snap-in base 527 extends into the second card slot 172, the snap-in protrusion 528 can snap into the snap-in groove 173 to limit the snap-in member 52 in the second card slot 172. The snap-in base 527 is generally a block-shaped structure; the shape of the second card slot 172 is generally the same as the shape of the snap-in base 527 to prevent the snap-in base 527 from shaking when it is located in the second card slot 172. The snap-in protrusion 528 is generally a spherical crown-shaped structure to facilitate entering the snap-in groove 173 through the second card slot 172; the shape of the snap-in groove 173 is generally the same as the shape of the snap-in protrusion 528 to prevent the snap-in protrusion 528 from shaking when it is located in the snap-in groove 173. The number of the snap-in protrusions 528 is two, and the two snap-in protrusions 528 are respectively located on the two opposite sides of the snap-in base 527. In order to enable the snap-in protrusion 528 to enter the snap-in groove 173 through the second card slot 172; the snap-in protrusion 528 is installed on the snap-in base 527 through a spring. Specifically, the snap-in base 527 has an installation channel, and both snap-in protrusions 528 are located in the installation channel, and a spring is provided between the two snap-in protrusions 528 or a spring is provided between the snap-in protrusion 528 and the installation channel. When the snap-in protrusion 528 passes through the second card slot 172, the two snap-in protrusions 528 can compress the spring; when the snap-in protrusion 528 is located in the snap-in groove 173, the spring resets to drive the two snap-in protrusions 528 to be located in the snap-in groove 173.

[0183] In this embodiment, as Figure 25 to Figure 29As shown, the smart glasses 100 further include a nose pad 70. The nose pad 70 is detachably snapped onto the spectacle frame 10 through a connecting member 73, thereby achieving the quick disassembly and assembly of the nose pad 70. This design not only facilitates the user to replace the nose pad 70 as needed, but also improves the flexibility and practicality of the smart glasses 100. Specifically, the nose pad 70 is detachably snapped onto the bridging portion 17 through the connecting member 73.

[0184] In this embodiment, as Figure 25 to Figure 29 shown, the nose pad 70 is generally in a V-shaped structure; the nose pad 70 includes a main body portion and two nose pad leaves (not shown) connected to the main body portion. The first connecting portion 731 of the connecting member 73 is fixedly connected to the main body portion. The first connecting portion 731 is fixed to the main body portion by means of bonding, welding or screws, etc.; the two nose pad leaves are fixedly or movably connected to the main body portion. In other embodiments, a heart rate sensor is provided on the side of the nose pad leaf close to the nose wing.

[0185] In this embodiment, as Figure 25 to Figure 29 shown, the spectacle frame 10 includes a first mating portion 18 and a second mating portion 19; the connecting member 73 includes a first connecting portion 731 and a second connecting portion 732. The first connecting portion 731 is fixedly connected to the nose pad 70 and can cooperate with the first mating portion 18 to limit the movement of the nose pad 70 relative to the spectacle frame 10 in a first direction; the second connecting portion 732 is fixedly connected to the first connecting portion 731 and can cooperate with the second mating portion 19 to limit the movement of the nose pad 70 relative to the spectacle frame 10 in a second direction different from the first direction; by restricting the movement of the nose pad 70 in the first direction and the second direction, the relative position of the nose pad 70 and the spectacle frame 10 can be fixed. Among them, the first direction and the second direction can be perpendicularly arranged.

[0186] In this embodiment, as Figure 25 to Figure 29 shown, the second connecting portion 732 can slide along the first direction with the second mating portion 19; when the second connecting portion 732 slides to a predetermined position, the first connecting portion 731 cooperates with the first mating portion 18 to limit the sliding of the second connecting portion 732. The first connecting portion 731 can move along the first direction with the second connecting portion 732 and has a locked state and an unlocked state of cooperating with the first mating portion 18 in the first direction; in the locked state, the first connecting portion 731 can be snapped with the first mating portion 18, and in the unlocked state, the first connecting portion 731 can move with the second connecting portion 732.

[0187] In this embodiment, as Figure 25 to Figure 29As shown, the first connecting portion 731 and the second connecting portion 732 are arranged along the second direction; the nose pad 70, the first connecting portion 731, and the second connecting portion 732 are arranged along the second direction, so that the structure of the nose pad 70 and the connecting member 73 is more compact. Both the first connecting portion 731 and the second connecting portion 732 are in a block structure; the first connecting portion 731 and the second connecting portion 732 may be integrally arranged.

[0188] In this embodiment, as Figure 25 to Figure 29 shown, the first engaging portion 18 includes an engaging groove 181, and the first connecting portion 731 can be located within the engaging groove 181 and is engaged with the engaging groove 181. In the locked state, the first connecting portion 731 can be engaged with the engaging groove 181 to limit the movement of the first connecting portion 731; in the unlocked state, the first connecting portion 731 can be in a non-engaged state with the engaging groove 181 to be able to move with the second connecting portion 732.

[0189] In this embodiment, as Figure 25 to Figure 29 shown, among the inner wall of the engaging groove 181 and the first connecting portion 731, one of them is provided with a locking block 733, and the other is provided with a first engaging slot 182, and the locking block 733 can be engaged with the first engaging slot 182. When installing the nose pad 70 onto the spectacle frame 10, the first connecting portion 731 moves along the first direction with the second connecting portion 732 until the locking block 733 is engaged with the first engaging slot 182, at which time the movement of the first connecting portion 731 in the first direction can be restricted; when detaching the nose pad 70 from the spectacle frame 10, the first connecting portion 731 moves along the first direction with the second connecting portion 732 until the locking block 733 disengages from the first engaging slot 182, at which time the movement of the first connecting portion 731 in the first direction can be released.

[0190] In this embodiment, as Figure 25 to Figure 29 shown, among the inner wall of the limiting groove 191 and the second connecting portion 732, one of them is provided with a locking block 733, and the other is provided with a first engaging slot 182, and the locking block 733 can be engaged with the first engaging slot 182. When installing the nose pad 70 onto the spectacle frame 10, the first connecting portion 731 moves along the first direction with the second connecting portion 732 until the locking block 733 is engaged with the first engaging slot 182, at which time the movement of the second connecting portion 732 in the first direction can be restricted; when detaching the nose pad 70 from the spectacle frame 10, the first connecting portion 731 moves along the first direction with the second connecting portion 732 until the locking block 733 disengages from the first engaging slot 182, at which time the movement of the second connecting portion 732 in the first direction can be released.

[0191] In this embodiment, as Figure 25 to Figure 29As shown, there are two blocks 733, which are respectively arranged on opposite sides of the first connecting portion 731 or the second connecting portion 732; there are two first slots 182, which are respectively arranged on opposite side walls of the matching slot 181 or the limiting slot 191; the two blocks 733 can be respectively engaged with the corresponding two first slots 182. When the nose pad 70 is mounted on the frame 10, the two blocks 733 are arranged along the second direction; the two first slots 182 are arranged along the second direction. Among them, the side wall of the matching slot 181 or the limiting slot 191 is partially recessed to form the first slot 182; the first connecting portion 731 or the second connecting portion 732 is partially convex to form the block 733.

[0192] In this embodiment, if Figure 25 to Figure 29 As shown, the mating groove 181 is open on the inner side and bottom of the frame 10; when the first connecting portion 731 is located in the mating groove 181, the first connecting portion 731 is flush with the frame 10; the first connecting portion 731 does not protrude from the frame 10, making the appearance of the smart glasses 100 more beautiful.

[0193] In this embodiment, if Figure 25 to Figure 29 As shown, the second matching portion 19 is a limiting groove 191 extending along the first direction. The second connecting portion 732 can be located in the limiting groove 191 and can slide along the limiting groove 191 to facilitate the disassembly and assembly of the second connecting portion 732 and the second matching portion 19, thereby facilitating the disassembly and assembly of the nose pad 70 and the frame 10.

[0194] In this embodiment, if Figure 25 to Figure 29 As shown, the limiting groove 191 extends upward from the bottom of the frame 10 and opens at the bottom of the frame 10; when the smart glasses 100 are worn, the frame 10 will exert a downward force on the nose pad 70, and the limiting groove 191 is open at the bottom of the frame 10, which can prevent the nose pad 70 from being forced to separate from the limiting groove 191, making the installation of the nose pad 70 more stable.

[0195] In this embodiment, if Figure 25 to Figure 29 As shown, the limiting groove 191 and the matching groove 181 are connected to each other; the limiting groove 191 and the matching groove 181 are arranged along the second direction. Along the second direction, the width of the matching groove 181 is smaller than the width of the limiting groove 191; so that the second connecting portion 732 has better stability and firmness in the limiting groove 191, and avoids falling off from one side of the matching groove 181 during use.

[0196] The specific process of disassembling and assembling the nose pad 70 and the frame 10 is described below:

[0197] When installing the nose pad 70 onto the spectacle frame 10, a force is applied to the nose pad 70. The second connecting portion 732 slides along the limiting groove 191, and the sliding path is along the first direction. The first connecting portion 731 moves along the first direction following the second connecting portion 732. Until the locking block 733 is engaged with the first clamping groove 182, at this time, the movement of the first connecting portion 731 and the second connecting portion 732 stops, so as to be able to install the nose pad 70 onto the spectacle frame 10.

[0198] When detaching the nose pad 70 from the spectacle frame 10, a force is applied to the nose pad 70. First, the locking block 733 is separated from the first clamping groove 182. The first connecting portion 731 slides along the mating groove 181 and the second connecting portion 732 slides along the limiting groove 191 until the first connecting portion 731 slides out of the mating groove 181 and the second connecting portion 732 slides out of the limiting groove 191. At this time, the nose pad 70 is detached from the spectacle frame 10.

[0199] In this embodiment, as Figure 30 to Figure 33 shown, the smart glasses 100 further include an optical engine housing 81 and an optical bracket 82. The optical engine housing 81 is disposed inside the spectacle frame 10 for fixing the optical engine module 80. The optical engine housing 81 is mounted on the waveguide 20 through the optical bracket 82. Among them, the waveguide 20 has an input element and an output element. The optical engine module 80 includes a display device and a lens group. The light beam emitted by the display device is shaped by the lens group and then incident on the input element of the waveguide 20. The light beam coupled into the waveguide 20 through the input element is transmitted in the waveguide in the form of total reflection, and then is coupled out to the human eye through the output element.

[0200] Through the detachable connection between the optical bracket 82 and the optical engine housing 81, the effect of quick disassembly between the waveguide 20 and the optical engine housing 81 is achieved, so as to facilitate the replacement of the waveguide 20 or the optical engine housing 81, reducing the maintenance cost and maintenance difficulty. And the optical bracket 82 has a simple structure. During the production process, the optical bracket 82 with a corresponding tilt angle can be replaced according to the requirements of the use scenario, avoiding the replacement of the expensive and complex optical engine housing 81 and reducing the production cost. In addition, for smart glasses products without design requirements for the front inclination angle, the optical engine housing 81 together with the optical engine module therein can be directly applied, and only the optical bracket 82 needs to be removed, without re-designing the optical engine module and the optical engine housing 81.

[0201] In this embodiment, as Figure 30 to Figure 33 shown, the spectacle frame 10 has an installation chamber 101, and the optical engine housing 81 is located inside the installation chamber 101. The optical engine housing 81 is directly embedded and installed inside the spectacle frame 10 without being exposed outside, making the structure of the smart glasses 100 more compact and the appearance more beautiful. In other embodiments, to further ensure the installation firmness of the optical engine housing 81, the optical engine housing 81 can be bonded inside the installation chamber 101.

[0202] In this embodiment, as Figure 30 to Figure 33As shown, the optical bracket 82 is snap-fitted with the optical machine housing 81. This design makes the connection between the optical bracket 82 and the optical machine housing 81 more firm and reliable, and is also convenient for users to disassemble and replace. Specifically, one of the optical bracket 82 and the optical machine housing 81 is provided with a snap-fitting protrusion 811, and the other is provided with a third snap-fitting groove 821 snap-fitted with the snap-fitting protrusion 811. For example, the optical bracket 82 is provided with the third snap-fitting groove 821, and the optical machine housing 81 is provided with the snap-fitting protrusion 811.

[0203] In this embodiment, if Figure 30 to Figure 33 As shown, the optical machine housing 81 has a light outlet 812, and the optical bracket 82 has a light through hole 825 connected to the light outlet 812. At least part of the optical machine housing 81 extends into the light through hole 825, which can make the optical bracket 82 and the optical machine housing 81 stably connected; in addition, it can also prevent the optical bracket 82 and the optical machine housing 81 from unnecessary displacement or shaking during use to a certain extent, further ensuring the optical performance and overall structural stability of the smart glasses 100. During assembly, it is only necessary to align the optical machine housing 81 with the light through hole 825 of the optical bracket 82, and then push the optical machine housing 81 or the optical bracket 82 so that the optical machine housing 81 moves along the light through hole 825 until the engaging protrusion 811 engages with the third engaging groove 821, and the connection between the two is completed. The operation is simple and quick, and does not require complex tools and professional skills. The light beam emitted by the display device in the optical machine module 80 is shaped by the lens group and then passes through the light outlet 812 and the light through port 825 in sequence before being incident on the coupling element of the waveguide 20 .

[0204] In this embodiment, if Figure 30 to Figure 33 As shown, the optical bracket 82 has a first adhesive surface 822, and the first adhesive surface 822 is fixed to the waveguide 20 by dispensing. The first adhesive surface 822 is in contact with the waveguide 20 to ensure the stability of the position of the waveguide 20 during the installation process and prevent it from shifting during assembly or use. The optical bracket 82 is located between the waveguide 20 and the optical machine housing 81. The optical bracket 82 is provided with a dispensing port 826, which facilitates the dispensing of glue between the first adhesive surface 822 and the waveguide 20 after the waveguide 20 is assembled on the first adhesive surface 822 to achieve preliminary positioning, and further fixation is achieved by dispensing glue between the first adhesive surface 822 and the waveguide 20.

[0205] In this embodiment, if Figure 30 to Figure 33As shown, the optical bracket 82 also has a first glue overflow surface 823. A gap is provided between the first glue overflow surface 823 and the waveguide 20 to be able to receive the excess glue during the dispensing and assembly process between the waveguide 20 and the first glue bonding surface 822, preventing the glue from overflowing to unwanted places and affecting the assembly and performance of the smart glasses 100. The first glue overflow surface 823 is used to be further fixed to the waveguide 20 through the excess overflowing glue. This design not only enhances the connection strength between the waveguide 20 and the optical bracket 82, but also makes the fixing process simpler and more efficient. Through the cooperation of the first glue bonding surface 822 and the first glue overflow surface 823, the stable installation of the waveguide 20 is achieved, while ensuring good display effects and user experiences.

[0206] In this embodiment, as Figure 30 to Figure 33 shown, the first glue bonding surface 822 is inclined so that the front tilt angle of the smart glasses 100 is from 2 degrees to 150 degrees; by adjusting the front tilt angle of the smart glasses 100, it is possible to make the user more comfortable when wearing the smart glasses 100 and reduce visual fatigue and discomfort caused by too large or too small front tilt angles.

[0207] In this embodiment, as Figure 30 to Figure 33 shown, the angle between the first glue bonding surface 822 and the vertical direction is from 2 degrees to 10 degrees, or the angle between the first glue bonding surface 822 and the length direction of the temple 40 is from 80 degrees to 88 degrees. By setting such an angle range, it is possible to meet the range of the front tilt angle of the smart glasses 100 from 2 degrees to 10 degrees to meet the needs of different users for the wearing comfort and visual experience of the smart glasses 100. Among them, as Fig.12 shown, the angle between the first glue bonding surface 822 and the vertical direction is a, and the angle between the first glue bonding surface 822 and the length direction of the temple 40 is b.

[0208] Preferably, the angle between the first glue bonding surface 822 and the vertical direction is from 2 degrees to 8 degrees, or the angle between the first glue bonding surface 822 and the extending direction of the temple 40 is from 82 degrees to 88 degrees, so that the front tilt angle of the smart glasses 100 is from 2 degrees to 8 degrees. This angle range has been proven to provide the best visual effects and wearing comfort for users in most usage scenarios. Further preferably, the angle between the first glue bonding surface 822 and the vertical direction is from 2 degrees to 6 degrees, or the angle between the first glue bonding surface 822 and the extending direction of the temple 40 is from 84 degrees to 88 degrees, so that the front tilt angle of the smart glasses 100 is from 2 degrees to 6 degrees. Specifically, the angle between the first glue bonding surface 822 and the vertical direction can be 2°, 3°, 4°, 5°, 6° or a range value composed of any two numerical values.

[0209] In this embodiment, as Figure 30 to Figure 33As shown, the waveguide 20 has a connecting portion 23, and the connecting portion 23 is fixed to the first adhesive surface 822; the optical bracket 82 includes a positioning flange 824, and the positioning flange 824 is located on the outer peripheral side of the connecting portion 23 so as to be able to position the positions of the waveguide 20 and the relative optical bracket 82; wherein, the coupling element of the waveguide 20 is arranged on the connecting portion 23 and corresponds to the light passing port 825 on the optical bracket 82. During the assembly process, the positioning flange 824 can accurately position the positions of the waveguide 20 and the optical bracket 82, so that the waveguide 20 can be accurately installed at a predetermined position, and then the connecting portion 23 is closely attached and fixed to the first adhesive surface 822, and is fixedly connected by a dotting method to ensure the firmness of the connection. Among them, the dotting port 826 is located on the positioning flange 824. In some embodiments, the light output port 812 of the optical machine housing 81 is generally arranged on one side of the waveguide 20. In order for the waveguide 20 to receive the light beam emitted by the display device in the optical machine module, the waveguide 20 can extend a connecting portion 23 to receive the light beam from the display device through the connecting portion 23.

[0210] In this embodiment, as Figure 30 to Figure 33 shown, the connecting portion 23 is located at the outer edge of the waveguide 20 and is convexly arranged outward. The height of the positioning flange 824 is higher than that of the first adhesive surface 822 and is generally flush with the side of the waveguide 20 facing away from the first adhesive surface 822.

[0211] In this embodiment, as Figure 34 to Figure 38 shown, an installation cavity 412 for accommodating the electronic module 43 and a through hole 413 communicating with the installation cavity 412 are provided in the temple 40; the smart glasses 100 further include a flexible circuit board 44, and the flexible circuit board 44 passes through the through hole 413 and is adhesively and hermetically connected to the through hole 413 to be electrically connected to the electronic module in the installation cavity 412.

[0212] The adhesively sealed connection between the through hole 413 and the flexible circuit board 44 can block moisture from the outside and prevent it from penetrating into the installation cavity 412, thereby ensuring the normal operation of the electronic module 43. Specifically, the flexible circuit board 44 passes through the through hole 413, and the sealed cooperation between the two can effectively block moisture from entering the installation cavity 412 along the flexible circuit board 44 or the gap of the through hole on the temple 40. The through hole 413 not only ensures the normal connection of the circuit, but also avoids circuit short-circuit or damage caused by moisture intrusion, realizes excellent waterproof performance, greatly improves the practicability and durability of the smart glasses 100, and brings a more convenient and safe wearing experience to users.

[0213] In this embodiment, as Figure 34 to Figure 38As shown, both the electronic module 43 and the flexible circuit board 44 can adopt existing technical structures. For example, the electronic module 43 can include electronic components such as a microphone, a speaker, a battery, a processor, a memory, a sensor, a communication module, and an electronic button; the flexible circuit board 44 is the FPC to realize data transmission and function control of the electronic module 43. A battery is provided inside the temple 40, and the battery powers the optical engine module 80 and the electronic module 43 through the flexible circuit board 44.

[0214] In this embodiment, as Figure 34 to Figure 38 shown, the temple 40 includes a temple housing 41, and a through hole 413 and an installation cavity 412 are both formed inside the temple housing 41. Among them, the aperture of the through hole 413 ensures that the flexible circuit board 44 can pass through while minimizing the communication area with the outside as much as possible.

[0215] In this embodiment, as Figure 34 to Figure 38 shown, the smart glasses 100 further include a rotating shaft structure 45. The rotating shaft structure 45 connects the frame 10 and the temple 40 and can enable the temple 40 to rotate relative to the frame 10; when the temple 40 rotates relative to the frame 10, the smart glasses 100 have an unfolded state and a folded state; among them, the number of temples 40 is two, and the two temples 40 are respectively located on both sides of the frame 10.

[0216] The flexible circuit board 44 passes through the rotating shaft structure 45. The rotating shaft structure 45 includes a first pivoting portion 451 and a second pivoting portion 452 that are rotationally engaged. One of the first pivoting portion 451 and the second pivoting portion 452 is fixed to the frame 10, and the other is fixed to the temple 40. Specifically, both the first pivoting portion 451 and the second pivoting portion 452 are provided with pin holes, and a pin shaft passes through the pin holes on the first pivoting portion 451 and the second pivoting portion 452 in sequence to enable the first pivoting portion 451 and the second pivoting portion 452 to be rotationally engaged. Among them, a wire passing gap for the flexible circuit board 44 to pass through is provided between the first pivoting portion 451 and the second pivoting portion 452, which can cooperate with the shielding portion 42 to prevent the flexible circuit board 44 from being exposed.

[0217] In this embodiment, as Figure 34 to Figure 38 shown, a shielding portion 42 is further arranged between the frame 10 and the temple 40. In any rotational state of the temple 40 relative to the frame 10, the shielding portion 42 always shields the flexible circuit board 44 to prevent the flexible circuit board 44 from being exposed and make the smart glasses 100 more beautiful.

[0218] In this embodiment, as Figure 34 to Figure 38As shown, the shielding part 42 is installed on the temple 40 and can extend into the frame 10; when the smart glasses 100 are in the unfolded state, the shielding part 42 can extend into the frame 10. The shielding part 42 is arc-shaped; an arc-shaped groove matching with the shielding part 42 is provided in the frame 10. When the temple 40 rotates relative to the frame 10, it is avoided that the shielding part 42 occupies a large space inside the frame 10.

[0219] In this embodiment, as Figure 34 to Figure 38 shown, the shielding part 42 is integrally provided on the temple 40, so that the structure of the shielding part 42 and the temple 40 is more firm, and the processing difficulty of the shielding part 42 and the temple 40 is reduced. Specifically, the shielding part 42 is integrally provided on the end plate 416 of the temple 40. The shielding part 42 is located outside the rotating shaft structure 45 and forms a partial wire passing channel 417 with the wire passing gap of the rotating shaft structure 45.

[0220] In this embodiment, as Figure 34 to Figure 38 shown, one of the frame 10 and the temple 40 is provided with an elastic member 46, and the other is provided with an abutting part 461 that can cooperate with the elastic member 46; the elastic member 46 is located outside the rotation axis of the frame 10 and the temple 40. The elastic member 46 is provided for limiting, can control the opening and closing angle between the temple 40 and the frame 10, that is, adjust the distance between the two temples 40, expand the range of users, and at the same time can provide resistance, increase the clamping force on the head, so that the temple 40 fits the user's head, so that the user wears the smart glasses 100 more firmly and improves the use reliability.

[0221] In this embodiment, as Figure 34 to Figure 38 shown, the elastic member 46 includes an elastic part 462 and an abutting block 463. The abutting block 463 is movably attached to the frame 10 or the temple 40 by an elastic part 462 to be able to cooperate with the abutting part 461. Among them, the abutting block 463 is provided on the temple 40, and the abutting part 461 is provided on the frame 10. Specifically, the arc-shaped groove matching with the shielding part 42 is provided on the abutting part 461. The abutting part 461 can be integrally formed with the frame 10 or separately provided from the frame 10; in the case where the abutting part 461 is separately provided from the frame 10, the abutting part 461 is detachably linked to the frame 10. The abutting part 461 is located between the frame 10 and the temple 40. The abutting part 461 is provided with an arc-shaped groove communicating with the installation chamber 101 of the frame 10. The shielding part 42 is slidably connected to the arc-shaped groove. The shielding part 42 slides along the arc-shaped groove, improving the sliding accuracy in the preset direction and preventing slipping.

[0222] In this embodiment, as Figure 34 to Figure 38As shown, the temple 40 further has a movable cavity 411, and the elastic member 462 is installed in the movable cavity 411; one end of the abutting block 463 is connected to the elastic member 462, and the other end extends out of the movable cavity 411.

[0223] In this embodiment, as Figures 34 to 38 shown, a partition 415 and an end plate 416 are further provided in the temple 40. The partition 415 divides the space in the temple 40 into a movable cavity 411 and a mounting cavity 412, and the through hole 413 is located on the partition 415. The end plate 416 is disposed opposite to the partition 415. The movable cavity 411 is located between the end plate 416 and the partition 415. The end plate 416 is provided with a wire passing hole 414 for the flexible circuit board 44 to pass through, and has an opening for the abutting block 463 to slide. The temple 40 includes a front shell 901 and a rear cover 902 that are snap-fitted. The front shell 901 is closer to the human face, and the rear cover 902 is farther from the human face. In this embodiment, the end plate 416 and the rear cover 902 are integrally formed.

[0224] In this embodiment, as Figures 34 to 38 shown, the movable cavity 411 and the mounting cavity 412 are arranged in sequence along the length direction of the temple, and the movable cavity 411 is closer to the lens frame 10 than the mounting cavity 412, so that the layout of the movable cavity 411 and the mounting cavity 412 is more reasonable. The through hole 413 and the wire passing hole 414 are located on both sides of the movable cavity 411, and the movable cavity 411 is communicated with the wire passing hole 414 through the through hole 413; a wire passing channel 417 for the flexible circuit board 44 to pass through the temple 40 is formed between the through hole 413 and the wire passing hole 414.

[0225] In this embodiment, as Figures 39 to 46 shown, the smart glasses 100 further include an audio mechanism 90, and the audio mechanism is installed on the temple 40. The audio mechanism 90 includes a main body 91 and a sound emitting device 92. The main body 91 is the temple 40. The main body 91 includes two first side walls 911 arranged opposite to each other, and two second side walls 912 connected between the two first side walls 911 and arranged opposite to each other. The main body 91 is provided with a receiving cavity 913, a sound outlet hole 9133 and a sound leakage hole 9134; the sound emitting device 92 is disposed in the receiving cavity 913 by means of a carrier bracket 93. The sound emitting device 92, the carrier bracket 93, the first side wall 911 and the second side wall 912 cooperate to divide the receiving cavity 913 into independent front cavity 9131 and rear cavity 9132; wherein, the sound outlet hole 9133 is configured to communicate the front cavity 9131 with the outside, and the sound leakage hole 9134 is configured to communicate the rear cavity 9132 with the outside.

[0226] When assembling the sounding device 92 into the main body 91, the sounding device 92 and the supporting bracket 93 can be assembled first, and then the sounding device 92 and the supporting bracket 93 can be assembled into the main body 91 together, that is, the sounding device 92 and the supporting bracket 93 are assembled as an integral structure to form an audio mechanism, which can be quickly installed in the main body 91, thereby improving the assembly efficiency of the audio mechanism, while reducing the dependence on the internal structure of the main body 91, making it convenient to install the audio mechanism in different smart glasses products.

[0227] In this embodiment, if Figures 39 to 46 As shown, the cross-sectional outer contour of the main body 91 is not strictly limited; for example, the cross-sectional outer contour of the main body 91 is a rectangular, elliptical or irregular shape. The two first side walls 911 are respectively a bottom wall 9111 and a top wall 9112; the two second side walls 912 are respectively an inner wall 9121 and an outer wall 9122. Regardless of the cross-sectional shape of the main body 91, it can always be defined that the side facing the user's ear is the bottom wall 9111, the side away from the user's ear is the top wall 9112, the side facing the user's head is the inner wall 9121, and the side away from the user's head is the outer wall 9122.

[0228] In this embodiment, if Figures 39 to 46 As shown, the main body 91 is provided with a first retaining wall 915 and a second retaining wall 916 along the length direction, and the first retaining wall 915, the second retaining wall 916 and the first side wall 911 and the second side wall 912 of the main body 91 enclose the closed accommodating cavity 913, and the supporting bracket 93 is arranged in the accommodating cavity 913. That is, the first retaining wall 915 and the second retaining wall 916 divide the installation cavity 412 into three chambers, wherein the chamber between the first retaining wall 915 and the partition 415 is the installation cavity 412, in which the electronic module 43 is accommodated, the chamber between the first retaining wall 915 and the second retaining wall 916 is the accommodating cavity 913, and the chamber between the second retaining wall 916 and the tail of the main body 91 is the tail cavity.

[0229] In this embodiment, if Figures 39 to 46 As shown, the main body 91 includes a front shell 901 and a rear cover 902; the rear cover 902 is located on the side of the main body 91 close to the user's head relative to the shell. The rear cover 902 includes an inner wall 9121; the front shell 901 includes a top wall 9112, a bottom wall 9111 and an outer wall 9122. The side of the front shell 901 facing the rear cover 902 is an installation space with an open side, and the rear cover 902 is covered on the open side of the front shell 901 and seals the open side, and forms a receiving cavity 913 with the front shell 901, the first retaining wall 915, and the second retaining wall 916. The front shell 901 and the rear cover 902 can be sealed and connected by snaps, gluing, welding, screws, etc. to improve the overall waterproofness of the audio mechanism 90.

[0230] In this embodiment, if Figures 39 to 46 As shown, the main body 91 is mounted on the user's ear, and the main body 91 can be divided into two sections. Specifically, the main body 91 includes a connecting section 903 and an arc section 904; wherein the connecting section 903 is generally in a strip structure and is located in front of the user's ear; and the arc section 904 is located above the user's ear.

[0231] In this embodiment, if Figures 39 to 46 As shown, when the supporting bracket 93 and the sounding device 92 are located in the main body 91, the front cavity 9131 and the rear cavity 9132 are not intercommunication. The front cavity 9131 and the rear cavity 9132 are respectively arranged on both sides of the width direction (i.e., the direction from the outer wall 9122 to the inner wall 9121) of the main body 91. The front cavity 9131 is located on the side close to the outer wall 9122, and the rear cavity 9132 is located on the side close to the inner wall 9121. Of course, in other embodiments, the front cavity 9131 may also be located on the side close to the inner wall 9121, and the rear cavity 9132 may also be located on the side close to the outer wall 9122.

[0232] In this embodiment, if Figures 39 to 46 As shown, the sound outlet 9133 and the sound leakage hole 9134 are respectively located on opposite sides of the main body 91; the first sound wave emitted by the front cavity 9131 enters the human ear through the sound outlet 9133 and is heard by the user, and the second sound wave emitted by the rear cavity 9132 is radiated to the outside world through the sound leakage hole 9134, and the second sound wave is opposite to the first sound wave in the outside world and cancels out, which can reduce sound leakage and improve sound quality. Specifically, the sound outlet 9133 is opened on the bottom wall 9111 and is close to the user's ear position, reducing the distance between the sound outlet and the ear, so that the sound flowing out of the sound outlet is directly transmitted to the ear, ensuring the transmission of sound, so that the user can clearly hear the sound exported from the front cavity 9131; the sound leakage hole 9134 is opened on the top wall 9112.

[0233] In this embodiment, if Figures 39 to 46 As shown, the sound outlet hole 9133 is roughly in the shape of a long strip. At the junction of the end of the connecting section 903 and the starting end of the arc section 904, a sound outlet hole 9133 is integrated. The sound outlet hole 9133 extends longitudinally along the length direction of the main body 91, spanning the transition area from the connecting section 903 to the arc section 904, ensuring sound transmission while optimizing wearing comfort and concealment. Of course, in other embodiments, the sound outlet hole 9133 can be located in the arc section 904 and adjacent to the connecting section 903; when the user wears the audio mechanism 90, the sound outlet hole 9133 is arranged toward the ear canal so that the user can clearly hear the sound from the sound outlet hole 9133. The sound leakage hole 9134 is roughly in the shape of a long strip; the sound leakage hole 9134 can be located in the connecting section 903 and adjacent to the arc section 904. Among them, a dustproof net 914 is provided in both the sound outlet hole 9133 and the sound leakage hole 9134 to prevent dust from entering the accommodating cavity 913.

[0234] In this embodiment, as Figures 39 to 46 shown, an amplification channel 9135 is provided between the front cavity 9131 and the sound outlet hole 9133. The volume of the amplification channel 9135 gradually increases from the front cavity 9131 to the sound outlet hole 9133, so as to be able to amplify the sound and improve the user's listening experience. The inner wall of the amplification channel 9135 is treated smoothly to reduce the loss of sound during propagation. In order to form the amplification channel 9135; referring to one embodiment, along the direction from the front cavity 9131 to the sound outlet hole 9133, a part of the carrier bracket 93 gradually moves away from the inner wall of the main body 91, so as to form the amplification channel 9135 between the carrier bracket 93 and the inner wall of the main body 91.

[0235] In this embodiment, as Figures 39 to 46 shown, the sound-emitting device 92 can be a speaker; the sound-emitting device 92 is located in the connecting section 903 and is adjacent to the arc section 904 to shorten the distance between the sound-emitting device 92 and the user's ear and reduce sound loss. The sound-emitting device 92 can be vertically installed in the main body 91, that is, the plane where the diaphragm in the sound-emitting device 92 is located is disposed opposite to the inner side wall 9121 and the outer side wall 9122 of the main body 91. Among them, the sound-emitting side of the sound-emitting device 92 faces the front cavity 9131 to ensure that the sound of the sound-emitting device 92 is transmitted through the sound outlet hole 9133.

[0236] In this embodiment, as Figures 39 to 46 shown, the carrier bracket 93 has an installation area 931 and a communication hole 932. The sound-emitting device 92 is installed in the installation area 931; the communication hole 932 penetrates through the carrier bracket 93, so that the sound-emitting device 92 is communicated with the front cavity 9131 through the communication hole 932, that is to say, the sound-emitting device 92 is located in the rear cavity 9132. The sound generated by the sound-emitting device 92 can smoothly propagate from the communication hole 932 to the front cavity 9131, and then be transmitted to the outside through the sound outlet hole 9133.

[0237] In this embodiment, as Figures 39 to 46 shown, one side of the carrier bracket 93 facing the rear cavity 9132 is recessed to form the installation area 931; at least part of the sound-emitting device 92 is installed in the installation area 931. The sound-emitting device 92 can be fixed to the carrier bracket 93 by gluing to enhance the connection strength between the sound-emitting device 92 and the carrier bracket 93. The communication hole 932 is located at the bottom of the installation area 931, so that the side of the sound-emitting device 92 facing the front cavity 9131 is exposed, so as to ensure that the sound of the sound-emitting device 92 can smoothly propagate from the communication hole 932 to the front cavity 9131.

[0238] In this embodiment, as Figures 39 to 46As shown, the carrier bracket 93 is bonded between the first side wall 911 and the second side wall 912 to enhance the connection strength between the carrier bracket 93 and the main body 91. When the sound generating device 92 is installed in the installation area 931, the sound generating device 92, the carrier bracket 93, the first side wall 911, and the second side wall 912 jointly enclose the front cavity 9131 or the rear cavity 9132.

[0239] In this embodiment, as Figures 39 to 46 shown, a convex edge 95 is provided between the first side wall 911 and the second side wall 912 of the main body 91, and the carrier bracket 93 can be bonded to the convex edge 95. The convex edge 95 can support the carrier bracket 93 and also helps to further fix the position of the carrier bracket 93, improving the overall stability of the audio mechanism 90. When the carrier bracket 93 is installed in place, the convex edge 95 can support and limit the carrier bracket 93, preventing the carrier bracket 93 from shaking within the main body 91 and ensuring the stability and reliability of the audio mechanism 90. Specifically, the inner wall of the outer side wall 9122 of the main body 91 has convex edges 95 arranged continuously or at intervals along the carrier bracket 93, and the carrier bracket 93 can be in contact with the convex edges 95 and glued to the convex edges 95.

[0240] In this embodiment, as Figures 39 to 46 shown, the audio mechanism 90 further includes a clamping structure 94 to stabilize the bonding of the carrier bracket 93 relative to the main body 91. When assembling the carrier bracket 93 into the main body 91, the carrier bracket 93 is clamped and fixed to the main body 91 through the clamping structure 94 and then glued. This not only simplifies the assembly process of the carrier bracket 93 but also greatly improves the stability and durability of the overall structure, and can also avoid component loosening problems caused by long-term use or external environmental factors, ensuring the continuous stability and reliability of audio output. Among them, the number of the clamping structures 94 can be 1 group, 2 groups, 3 groups, 4 groups or more than 4 groups; multiple groups of clamping structures 94 are arranged at intervals along the circumferential direction of the carrier bracket 93.

[0241] In this embodiment, as Figures 39 to 46 shown, the clamping structure 94 includes a locking tongue 941 and a locking portion 942; the locking tongue 941 is installed on one of the main body 91 and the carrier bracket 93; the locking portion 942 is provided on the other of the main body 91 and the carrier bracket 93, and the locking tongue 941 cooperates with the locking portion 942 to install the carrier bracket 93 on the main body 91. The locking tongue 941 and the locking portion 942 cooperate to achieve a stable connection between the carrier bracket 93 and the main body 91. Among them, an installation gap is formed between the locking portion 942 and the convex edge 95; after the locking tongue 941 passes over the locking portion 942, it is located in this installation gap and abuts against the side of the locking portion 942 facing the convex edge 95.

[0242] For facilitating the tongue 941 to cross over the engaging portion 942; referring to one embodiment, as Figures 29 to 36 shown, the tongue 941 is mounted on the main body 91 or the carrier bracket 93 through an elastic arm 943, so that the tongue 941 can elastically deform to facilitate crossing over the engaging portion 942. The tongue 941 can elastically deform, and can conveniently cross over the engaging portion 942 during the installation process. After being installed in place, the tongue 941 returns to its original state and tightly cooperates with the engaging portion 942 to prevent the carrier bracket 93 from loosening. Among them, the elastic arm 943 can be a component with its own elasticity, or a component that can deform under force conditions.

[0243] In this embodiment, as Figures 39 to 46 shown, the tongue 941 is mounted on the carrier bracket 93 through an elastic arm 943; the engaging portion 942 protrudes outward from the inner wall of the main body 91. The engaging portion 942 is integrally provided on the inner wall of the main body 91 to strengthen the structural strength between the engaging portion 942 and the main body 91, and to reduce the processing difficulty of the engaging portion 942 and the main body 91. The tongue 941 is integrally provided on the carrier bracket 93 to strengthen the structural strength between the tongue 941 and the carrier bracket 93, and to reduce the processing difficulty of the tongue 941 and the carrier bracket 93.

[0244] In this embodiment, as Figures 39 to 46 shown, one of the main body 91 and the carrier bracket 93 has a positioning groove 96, and the other has a positioning protrusion 97 that cooperates with the positioning groove 96. Through the cooperation of the positioning groove 96 and the positioning protrusion 97, the installation position of the carrier bracket 93 in the main body 91 can be ensured to be accurate, avoiding deviations during the installation process, and ensuring the stable performance of the audio mechanism 90.

[0245] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0246] It should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0247] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0248] The above are only the preferred embodiments of the present invention, and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An optical-mechanical module, characterized in that, Comprising: A display device for emitting a light beam; A beam steering element located on the light-emitting side of the display device. The light beam propagating in a first direction emitted by the display device is deflected by the beam steering element and then propagates in a second direction, and an angle is set between the first direction and the second direction; A beam shaping lens group for shaping the light beam. The beam shaping lens group includes a first lens, a second lens, and a third lens. The first lens is located between the display device and the beam steering element, the third lens is located on the light-emitting side of the beam steering element, and the second lens is located between the first lens and the third lens.

2. The optical engine module according to claim 1, wherein, The beam steering element includes a reflecting surface, and the included angle between the reflecting surface and the display device is an acute angle.

3. The optical engine module according to claim 1, wherein The beam steering element is a prism, and the prism includes a first transmission surface, a reflecting surface, and a second transmission surface connected in sequence. The light beam entering the prism from the first transmission surface is emitted from the second transmission surface after being reflected by the reflecting surface.

4. The optical engine module according to claim 3, wherein The prism is integrally formed or glued to the second lens; or, The prism is spaced apart from the second lens.

5. The optical engine module according to claim 3, wherein The second lens is composed of a first sub-lens and a second sub-lens. When the prism is integrally formed or glued to the second lens, the first sub-lens is integrally formed or glued to the first transmission surface, and the second sub-lens is integrally formed or glued to the second transmission surface.

6. The optical engine module according to claim 1, wherein The second lens is composed of a first sub-lens and a second sub-lens. The first sub-lens is located between the first lens and the beam steering element, and the second sub-lens is located between the beam steering element and the third lens.

7. The optical machine module according to claim 1, wherein The refractive indices of the first lens, the second lens, and the third lens are all greater than 1.47 and less than or equal to 1.

67.

8. The optical machine module according to any one of claims 1 to 7, characterized in that, The first lens, the second lens, and the third lens are all edge-cut lenses, and the aperture D of the edge-cut lens and the total focal length fn of the optical engine module satisfy: 0 < D / fn ≤ 0.

53.

9. The optical machine module according to any one of claims 1 to 7, characterized in that, The optical engine module satisfies at least one of the following conditions: The focal length f1 of the first lens and the total focal length fn of the optical engine module satisfy: -7.8 ≤ f1 / fn ≤ 2.8; The focal length f2 of the second lens and the total focal length fn of the optical engine module satisfy: -8.1 ≤ f2 / fn ≤ 4.9; The focal length f3 of the third lens and the total focal length fn of the optical engine module satisfy: 1.5 ≤ f3 / fn ≤ 2.

5.

10. A near-eye display device, characterized in that, Comprising: The optical engine module according to any one of claims 1 to 9; An optical waveguide display module, which includes a waveguide and an input element and an output element provided on the waveguide. The light beam emitted by the optical engine module is introduced into the waveguide through the input element, and after total reflection transmission in the waveguide, it is emitted from the output element to the human eye.

11. The near-eye display device according to claim 10, wherein, Both the input element and the output element are volume holographic gratings, and / or the periods of the input element and the output element are the same.

12. The near-eye display device according to claim 10, wherein, Both the coupling-in element and the coupling-out element are angular multiplexing gratings. The coupling-in element is divided into a plurality of coupling-in grating regions, and the coupling-out element is divided into a plurality of coupling-out grating regions. The plurality of coupling-in grating regions correspond to the plurality of coupling-out grating regions one by one.

13. The near-eye display device according to claim 10, wherein The coupling-in element is a coupling-in grating, and the coupling-out element is a coupling-out grating. The coupling-in grating is disposed on one side surface of the waveguide. The waveguide has an inclined surface, and an acute angle or an obtuse angle is formed between the inclined surface and the one side surface of the waveguide. The coupling-out grating is disposed on the inclined surface.

14. The near-eye display device according to claim 13, wherein The optical waveguide display module further includes a compensating mirror. The compensating mirror is adhered to the inclined surface of the waveguide, and the coupling-out grating is clamped between the inclined surface of the waveguide and the compensating mirror.

15. An intelligent glasses, characterized in that, Comprising: A spectacle frame and the near-eye display device according to any one of claims 10 to 14. The spectacle frame includes a front frame and a rear frame, and the waveguide of the near-eye display device is installed between the front frame and the rear frame. It further includes an optical engine housing and an optical bracket. The optical engine housing is disposed in the spectacle frame and is used for fixing the optical engine module of the near-eye display device. The optical engine housing is installed on the waveguide through the optical bracket.

16. An intelligent swimming goggle, characterized in that, Comprising: A spectacle frame; The near-eye display device according to any one of claims 10 to 14. The optical engine module and the optical waveguide display module of the near-eye display device are both disposed in the spectacle frame. The coupling-in element of the optical waveguide display module is the surface of the waveguide, and the surface is a plane or a curved surface.

Images