Optical machine modules, near-eye display devices, smart glasses and smart swimming goggles

Abstract

The present invention provides an optical machine module, a near-eye display device, smart glasses and smart swimming goggles. The optical machine module includes: a display device, the display device is used to emit a light beam; a light beam steering element, the light beam steering element is located on the light-emitting side of the display device, the light beam emitted by the display device and propagating along a first direction is deflected by the light beam steering element and propagates along a second direction, and the first direction and the second direction are set at an angle; a beam shaping lens group, the beam shaping lens group is used to shape the light beam, and 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 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. The present invention solves the problems of large size, heavy weight and non-compact structure of the optical machine module in the prior art.

Description

Technical Field

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

[0002] In the current field of augmented reality (AR) technology, smart glasses, as a crucial tool for delivering the AR experience, face numerous design challenges. Optical waveguide display technology, due to its lightweight and thin design, has been widely adopted in smart glasses. However, the design of the accompanying optomechanical module has become a bottleneck restricting the miniaturization and lightweighting of smart glasses. In traditional optomechanical / light engine structures, display devices such as organic light-emitting diodes (OLEDs) are arranged horizontally, resulting in a large thickness dimension of the optomechanical module. This not only increases the weight of the device but also affects the design of the smart glasses, making them bulky and creating pressure on the face when worn, reducing the user experience.

[0003] like Figure 10 As shown, the existing optical machine module usually adopts a straight-tube lens group 2', which is composed 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 it can be received by the optical waveguide plate 21'. The size and number of lenses in the process limit the overall compactness of the optical machine module, increasing the manufacturing cost and assembly difficulty. In addition, the light beam passes through many lenses during the transmission process, which will cause light energy loss and affect the final display effect. In the development of smart glasses that pursue a larger field of view, higher image quality and a lighter wearing experience, the design of the existing optical machine module can no longer meet the needs and has become a major obstacle to the development of augmented reality technology.

[0004] In other words, the optical machine module in the prior art has the problems of being large in size, heavy in weight, and having a non-compact structure. Summary of the Invention

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

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an optical machine module is provided, including: a display device, the display device is used to emit a light beam; a light beam steering element, the light beam steering element is located on the light-emitting side of the display device, the light beam emitted by the display device and propagating along a first direction is deflected by the light beam steering element and propagates along a second direction, and the first direction and the second direction are set at an angle; the light beam shaping lens group, the light beam shaping lens group is used to shape the light beam, the light 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 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.

[0007] Furthermore, the light beam steering element includes a reflective surface, and an angle between the reflective surface and the display device is an acute angle.

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

[0009] Furthermore, the prism and the second lens are integrally formed or glued together; or, the prism and the second lens are spaced apart.

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

[0011] Furthermore, 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 light beam steering element, and the second sub-lens is located between the light beam steering element and the third lens.

[0012] Furthermore, the refractive indexes 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] Furthermore, 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 machine module satisfy: 0<D / fn≤0.53.

[0014] Furthermore, the optical machine 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 machine 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 machine 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 machine module satisfy: 1.5≤f3 / fn≤2.5.

[0015] According to another aspect of the present invention, a near-eye display device is provided, comprising: the above-mentioned optomechanical module; an optical waveguide display module, the optical waveguide display module comprising a waveguide and an in-coupling element and an out-coupling element arranged on the waveguide, wherein the light beam emitted by the optomechanical module is introduced into the waveguide via the in-coupling element, and after total reflection transmission in the waveguide, is emitted to the human eye by the out-coupling element.

[0016] Furthermore, the coupling-in element and the coupling-out element are both volume holographic gratings, and / or the coupling-in element and the coupling-out element have the same period.

[0017] Furthermore, both the coupling-in element and the coupling-out element are angle multiplexing gratings, and 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, and the plurality of coupling-in grating regions correspond one to one to the plurality of coupling-out grating regions.

[0018] Furthermore, the coupling-in element is a coupling-in grating, the coupling-out element is a coupling-out grating, the coupling-in grating is arranged on one side surface of the waveguide, the waveguide has an inclined surface, the inclined surface is arranged at an acute angle or an obtuse angle to one side surface of the waveguide, and the coupling-out grating is arranged on the inclined surface.

[0019] Furthermore, the optical waveguide display module further includes a compensation mirror, which is bonded to the inclined surface of the waveguide, and the outcoupling grating is sandwiched between the inclined surface of the waveguide and the compensation mirror.

[0020] According to another aspect of the present invention, there is provided a pair of smart glasses, comprising: a frame and the above-mentioned near-eye display device, the frame comprising 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; and further comprising an optical machine housing and an optical bracket, the optical machine housing being arranged in the frame and used to fix the optical machine module of the near-eye display device, and the optical machine housing being installed on the waveguide via the optical bracket.

[0021] According to another aspect of the present invention, there is provided a smart swimming goggle comprising: a goggles frame; the aforementioned near-eye display device, wherein the optical-mechanical module and the optical waveguide display module of the near-eye display device are both disposed in the goggles frame, and the coupling element of the optical waveguide display module is the surface of the waveguide, which is a flat surface or a curved surface.

[0022] By applying the technical solution of the present invention, by setting a beam steering element to change the propagation direction of the light beam, the light path can be effectively folded, and the length dimension of the optical machine module can be compressed, which is beneficial to improving the structural compactness of the optical machine module. At the same time, the beam shaping effects of the first lens, the second lens, and the third lens are combined to achieve effective management and utilization of the light beam; in addition, the number of lenses used for shaping is saved, which is beneficial to reducing the overall weight of the optical machine module, thereby ensuring the lightweight of the optical machine module and improving the portability of the smart device it is used in. The application scenarios of the optical machine module of the present application include but are not limited to smart glasses, smart swimming goggles, etc., and are particularly suitable for occasions that require long-term wear, such as industrial maintenance, medical guidance, etc., which reduces the burden on the wearer and improves the comfort of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 A schematic structural diagram of an optical-mechanical module according to an optional embodiment of the present invention is shown;

[0025] Figure 2 A partial schematic diagram of an optical-mechanical module according to another optional embodiment of the present invention is shown;

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

[0027] Figure 4 A schematic diagram showing a partial structure of an optical-mechanical module according to another optional embodiment of the present invention is shown;

[0028] Figure 5 A schematic structural diagram of a near-eye display device according to an optional embodiment of the present invention is shown;

[0029] Figure 6 Shown Figure 5 A light path diagram of an optical waveguide display module according to an optional embodiment;

[0030] Figure 7 A schematic structural diagram of a near-eye display device according to another optional embodiment of the present invention is shown;

[0031] Figure 8 Shown Figure 5 A partial schematic diagram of smart glasses according to an optional embodiment of the present invention;

[0032] Figure 9 A schematic structural diagram of smart swimming goggles according to another optional embodiment of the present invention is shown;

[0033] Figure 10 The figure shows a schematic structural diagram of an optical machine module in the prior art;

[0034] Figure 11 A schematic structural diagram of smart glasses according to an embodiment of the present invention is shown;

[0035] Figure 12 Shown Figure 11 Schematic diagram of the decomposition structure of smart glasses;

[0036] Figure 13 Shown Figure 11 A schematic diagram of the structure of the smart glasses omitting part of the frame;

[0037] Figure 14 Shown Figure 11 A cross-sectional view of the smart glasses;

[0038] Figure 15 A schematic diagram showing the structure of smart glasses provided by another embodiment of the present invention with part of the frame omitted;

[0039] Figure 16 Shown Figure 15 A schematic diagram of the enlarged structure of part A;

[0040] Figure 17 Shown Figure 15 Schematic diagram of the enlarged structure of part B;

[0041] Figure 18 A cross-sectional view of smart glasses according to another embodiment of the present invention is shown;

[0042] Figure 19 Shown Figure 11 Schematic diagram of the structure of the smart glasses and the first expansion mirror;

[0043] Figure 20 Shown Figure 19 Schematic diagram of the decomposition structure of the smart glasses and the first expansion mirror;

[0044] Figure 21 Shown Figure 20 Schematic diagram of the enlarged structure of part C;

[0045] Figure 22 Shown Figure 19 sectional view of

[0046] Figure 23 Shown Figure 11 Schematic diagram of the structure of the smart glasses and the second expansion mirror;

[0047] Figure 24 Shown Figure 23 Schematic diagram of the decomposed structure of the smart glasses and the second expansion mirror;

[0048] Figure 25 Shown Figure 11 Schematic diagram of the structure of the frame and nose pads in the middle;

[0049] Figure 26 Shown Figure 25 Schematic diagram of the exploded structure of the frame and nose pads in the middle;

[0050] Figure 27 Shown Figure 26 Schematic diagram of the enlarged structure of part D in FIG;

[0051] Figure 28 Shown Figure 26 Schematic diagram of the structure of the middle nose pad;

[0052] Figure 29 Shown Figure 25 sectional view of

[0053] Figure 30 Shown Figure 11 A cross-sectional view of the smart glasses;

[0054] Figure 31 Shown Figure 30 Schematic diagram of the structure of the optical machine module, optical machine housing and optical bracket;

[0055] Figure 32 Shown Figure 31 Schematic diagram of the exploded structure of the optical engine module, optical engine housing and optical bracket;

[0056] Figure 33 Shown Figure 30 Schematic diagram of the structure of the optical bracket and waveguide;

[0057] Figure 34 Shown Figure 11 A schematic diagram of the smart glasses omitting some of its structures;

[0058] Figure 35 Shown Figure 34 The structural diagram of the rotating shaft structure is omitted;

[0059] Figure 36 Shown Figure 11 Schematic diagram of the partial structure of the middle temple and flexible circuit board;

[0060] Figure 37 Shown Figure 36 A schematic structural diagram of the housing with some temples omitted;

[0061] Figure 38 Shown Figure 11 Schematic diagram of the partial structure of the middle frame and flexible circuit board;

[0062] Figure 39 Shown Figure 11 Schematic diagram of the decomposition of smart glasses and audio structure;

[0063] Figure 40 Shown Figure 39 A cross-sectional view of the audio structure of smart glasses;

[0064] Figure 41 Shown Figure 39 A cross-sectional view of the audio structure of smart glasses;

[0065] Figure 42 Shown Figure 39 A cross-sectional view of the audio structure of smart glasses;

[0066] Figure 43 Shown Figure 39 The structural diagram of the rear cover is omitted;

[0067] Figure 44 Shown Figure 43 The structural diagram of the pronunciation device is omitted;

[0068] Figure 45 Shown Figure 44 The structural diagram of the supporting bracket is omitted;

[0069] Figure 46 Shown Figure 39 Schematic diagram of the structure of the middle load-bearing bracket.

[0070] The above 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. Reflection surface; 152. Second transmission surface; 160. Reflector; 170. Third lens; 211. Inclined surface; 220. In-coupling element; 230. Out-coupling element; 3. Compensating mirror; S7. Surface of the first lens close to the display device; S6. Surface of the first lens away from the display device; S5. Surface of the second lens close to the display device; S3. Surface of the second lens away from the display device; S2. Surface of the third lens close to the display device; S1. Surface of the third lens away 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, overflow surface; 16, lens frame; 17, bridge portion; 171, guide surface; 172, second card slot; 173, card groove; 18, first matching portion; 181, matching slot; 182, first card slot; 19, second matching portion; 191, limit slot; 20, waveguide; 21, positioning slot; 22, extension portion; 23, connecting portion; 30, buckle structure; 31, tongue; 32, card slot; 40, temple; 41, temple housing; 411, movable cavity; 412, installation cavity; 413, through hole; 414, wire hole; 415, partition; 416, end plate; 417, wire channel; 4 2. Shielding portion; 43. Electronic module; 44. Flexible circuit board; 45. Rotating shaft structure; 451. First pivoting portion; 452. Second pivoting portion; 46. Elastic member; 461. Abutting portion; 462. Elastic member; 463. Abutting block; 50. Extension mirror assembly; 51. Extension mirror; 52. Snap-fitting member; 521. Snap-fitting groove; 523. Main body; 524. Snap-fitting portion; 525. Connecting groove; 526. Avoidance port; 527. Snap-fitting base; 528. Snap-fitting protrusion; 70. Nose pad; 73. Connecting member; 731. First connecting portion; 732. Second connecting portion; 733. Snap-fitting block; 80. Optical machine module; 81. Optical machine housing; 811. Snap-fitting protrusion; 812. Light outlet; 82. Optical bracket; 821 , third card slot; 822, first adhesive surface; 823, first overflow glue surface; 824, positioning flange; 825, light outlet; 826, glue dispensing port; 90, audio mechanism; 91, main body; 901, front shell; 902, back cover; 903, connecting 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, accommodating chamber; 9131, front chamber; 9132, back chamber; 9133, sound outlet; 9134, sound leakage hole; 9135, sound amplification channel; 914, dustproof net; 915, first retaining wall; 916, second retaining wall; 92, sound device; 93, supporting bracket; 931, installation area;932, connecting hole; 94, snap-fit ​​structure; 941, locking tongue; 942, locking portion; 943, elastic arm; 95, raised edge; 96, positioning groove; 97, positioning protrusion. DETAILED DESCRIPTION

[0072] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0073] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0074] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0075] In order to solve the problems of large size, heavy weight and non-compact structure of optical machine modules in the prior art, the present invention provides an optical machine module, a near-eye display device, smart glasses and smart swimming goggles.

[0076] like Figures 1 to 4 As shown, the present invention provides an optical machine module 80. The optical machine 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 light beam. The beam steering element is located on the light-emitting side of the display device 110. The light beam emitted by the display device 110, which propagates in a first direction, propagates in a second direction after being deflected by the beam steering element. The first direction and the second direction are set at an angle. The beam shaping lens group is used to shape the light 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 a beam steering element to change the direction of light beam propagation, the optical path can be effectively folded, and the length of the optical machine module 80 can be compressed, which is beneficial to improving the structural compactness of the optical machine module 80. At the same time, combined with the beam shaping function of the first lens 120, the second lens and the third lens 170, effective management and utilization of the light 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 machine module 80, thereby ensuring the lightweight of the optical machine module 80 and improving the portability of the smart device it is used in. The application scenarios of the optical machine module 80 of the present application include but are not limited to smart glasses, smart swimming goggles, etc., and are particularly suitable for occasions that require long-term wear, such as industrial maintenance, medical guidance, etc., reducing the burden on the wearer and improving the comfort of use.

[0078] like Figures 1 to 4 As shown, the beam steering element includes a reflective surface S4, which forms an acute angle with the display device 110. In other words, reflective surface S4 is tilted relative to the display device 110. By allowing light to be totally reflected on reflective surface S4, light energy loss is reduced, thereby improving light energy utilization.

[0079] like Figures 1 to 4 As shown, in various optional embodiments of the present application, the beam steering element is one of a reflector 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, with the first sub-lens 130 located between the first lens 120 and the beam steering element, and the second sub-lens 140 located between the beam steering element and the third lens 170.

[0080] exist Figures 1 to 3 In the illustrated embodiment, the light beam redirecting element is a prism 150, which includes a first transmissive surface 151, a reflective surface S4, and a second transmissive surface 152, connected in sequence. A light beam entering the prism 150 through the first transmissive surface 151 is reflected by the reflective surface S4 and then emitted from the second transmissive surface 152. The design principle of the prism 150 utilizes the refraction and total reflection properties of light, achieving a change in the light beam path through refraction at the first and second transmissive surfaces 151 and 152, and total reflection at the reflective surface S4.

[0081] Specifically, refer to Figure 1As shown in , the prism 150 can be formed integrally with the second lens. Specifically, the first sub-lens 130 is formed integrally with the first transmission surface 151, and the second sub-lens 140 is formed integrally with the second transmission surface 152. By setting the second lens and the prism 150 as one body, the positioning of the two is facilitated, and at the same time, the production and assembly difficulty of the optical module 80 and the complexity of the structural design can be reduced, the assembly process is simplified, and the assembly efficiency is improved; 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 glued to the second lens. Specifically, the first sub-lens 130 is glued to the first transmission surface 151, and the second sub-lens 140 is glued to the second transmission surface 152. This arrangement can also achieve the compression of the volume of the optical module 80. The gluing connection allows different materials to be used for different parts of the prism 150 and the second lens to meet their specific optical and mechanical performance requirements. At the same time, if a component of the prism 150 or the second lens is damaged or needs to be upgraded, the gluing design allows the prism 150 or the second lens to be replaced separately without having to remanufacture the entire assembly, reducing maintenance costs. In addition, during the gluing process, the performance of the optical system can be fine-tuned by controlling parameters such as the thickness and refractive index of the gluing layer. Preferably, the first transmission surface 151, the second transmission surface 152, the side surface of the first sub-lens 130 facing the first transmission surface 151, and the side surface of the second sub-lens 140 facing the second transmission surface 152 are all flat surfaces. This facilitates the integration of the prism 150 and the second lens.

[0082] Specifically, refer to Figure 2 As shown in , the prism 150 and the second lens may be spaced apart. Specifically, the first sub-lens 130 and the first transmission surface 151 are spaced apart in a first direction, and the second sub-lens 140 and the second transmission surface 152 are spaced apart in a second direction. In this case, the first transmission surface 151 is a flat surface or a curved surface, and the second transmission surface 152 is a flat surface or a curved surface, which can be selected according to actual conditions. Preferably, both the first transmission surface 151 and the second transmission surface 152 are flat surfaces. In this case, the light beam emitted by each pixel on the display device 110 passes through the first lens 120 and the first sub-lens 130 in sequence, and then passes through the first transmission surface 151 and enters the interior of the prism 150. The direction of the principal light beam in the on-axis field of view is perpendicular to the first transmission surface 151. If the first transmission surface 151 is a curved surface, the direction of the principal light beam coincides with the optical axis of the first transmission surface 151. The light beam is totally reflected by the reflective surface S4 inside the prism 150, then transmitted through the second transmissive surface 152 before exiting the prism 150. At this point, the principal ray direction of the light beam is perpendicular to the second transmissive surface 152. If the second transmissive surface 152 is curved, the principal ray direction coincides with the optical axis of the second transmissive surface 152. Furthermore, the light beam is further reshaped by the second sub-lens 140 and the third lens 170 before exiting as parallel light. Figure 1 The line with an arrow in the middle can be regarded as a beam of light, and the arrow indicates the direction of propagation of the light.

[0083] exist Figure 4 In another specific embodiment shown, the light beam steering element is a reflector 160, and the reflector 160 has a reflective surface S4. At this time, the first sub-lens 130 is located on the light incident side of the reflector 160, and the second sub-lens 140 is located on the light exit side of the reflector 160. At this time, the light beam emitted by each pixel on the display device 110 is transmitted along the first direction, and after passing through the first lens 120 and the first sub-lens 130 in sequence, it is reflected by the reflector 160 and transmitted along the second direction, and further passes through the second sub-lens 140 and the third lens 170 in sequence and is reshaped again before being emitted as parallel light. The design principle of the reflector 160 is to utilize the high reflectivity of its surface to reflect the light beam from the first direction to the second direction, thereby changing the propagation path of the light beam. The setting of the reflector 160 can reduce the overall weight. Optionally, in specific applications, a film can be applied 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 efficiency of light transmission.

[0084] In summary, in practical applications, the reflector 160 or the prism 150 can be selected as the beam steering element according to the actual situation. Figures 1 to 3 The prism 150 shown in FIG. 1 shows that the light beams emitted from each pixel 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 reflection surface S4 inside the prism 150 and then leave the prism 150. Figure 4 In the case where the light beam steering element is a reflector 160 , the light beam is totally reflected and transmitted by the reflective surface S4 inside the prism 150 , which can reduce the loss of light energy and improve the utilization efficiency of light energy. The structure is simple and no coating is required.

[0085] In a preferred embodiment of the present application, the angle between the first direction and the second direction is a right angle. That is, the main light direction of the light beam emitted by the display module is perpendicular to the main light direction of the light beam reflected by the reflective surface S4. This arrangement makes the overall light path trend and structural arrangement of the optical machine module 80 L-shaped. The design principle is to redirect the light beam from the first direction to the second direction perpendicular to it through the light beam steering element, so as to achieve efficient management and utilization of the light beam path. This is conducive to making the structure of the optical machine module 80 more compact. Figure 1 As 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 assembly comprises the aforementioned first lens 120, second lens, and third lens 170, and that the first lens 120, second lens, and third lens 170 are collectively 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 a first direction, while the second sub-lens 140 and the third lens 170 are arranged along a 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 a first optical axis, while the third lens 170 and the second sub-lens 140 are arranged along a second optical axis. The first optical axis forms a second optical axis after reflection 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 ease of processing and production, the second lens is split into the first sub-lens 130 and the second sub-lens 140, which can be integrally injection molded or glued together with the prism 150. The first sub-lens 130 and the second sub-lens 140 should be viewed as a whole, whether in terms of optical focal length or optical modulation effect. In other words, 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 index of the first lens 120, the second lens 170, and the 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, the propagation path of the light beam within each lens is optimized, which helps balance light aberrations, reduce light energy loss, and improve the optical performance of the optical engine module 80.

[0089] In an optional embodiment of the present application, the first lens 120, the second lens and the third lens 170 are all trimmed lenses. It should be noted here that the original first lens 120 to the third lens 170 are all circular lenses. The first lens 120 to the third lens 170 are trimmed along the optical axis direction thereof, and the cutting direction is parallel to the optical axis direction of the lens. In order to enable the image light beam output by the display device 110 to be fully reflected on the reflection surface S4, the aperture D of the trimmed lens and the total focal length fn of the optical machine module 80 are controlled to satisfy: 0<D / fn≤0.53. The aperture D of the trimmed lens here is actually the minimum aperture of the lens after trimming. If D / fn is greater than 0.53, the image light beam output by the display device 110 cannot be fully reflected on the reflection surface S4, and a coating needs to be applied to the reflection surface S4. Compared with the total reflection method, the light energy utilization efficiency of the coating method is low.

[0090] In different embodiments of the present application, the aperture D of the trimmed lens can be 5mm, 5.2mm, 5.4mm, 5.6mm, etc., the total focal length fn of the optical machine 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 meets at least one of the following conditions:

[0092] The focal length f1 of the first lens and the total focal length fn of the optical machine module satisfy the following: -7.8≤f1 / fn≤2.8.

[0093] The focal length f2 of the second lens and the total focal length fn of the optical machine module satisfy the following condition: -8.1≤f2 / fn≤4.9.

[0094] The focal length f3 of the third lens and the total focal length fn of the optical machine module satisfy the following condition: 1.5≤f3 / fn≤2.5.

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

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

[0097] Optionally, the surface shape of the first lens can be set to one of spherical, aspherical, and free-form surfaces; the surface shape of the second lens can be set to one of spherical, aspherical, and free-form surfaces; and the surface shape of the third lens can be set to one of spherical, aspherical, and free-form surfaces, and can be set according to actual needs. Preferably, the surface shapes of the first, second, and third lenses are all aspherical. This reduces the overall weight while better correcting aberrations and ensuring the quality of the output image.

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

[0099] Three examples of beam shaping lens systems that may be suitable for this application are shown below.

[0100] Example 1

[0101] Table 1 below shows the basic structural parameters of the beam shaping lens assembly for Example 1. The units for curvature radius, thickness / distance, and focal length are all in millimeters. In the table below, the lens surface closest to the display is labeled S7. Similarly, from the display to the light-emitting side of the optical engine module, the lens surfaces are labeled S7, S6, S5, S4, S3, S2, and S1, respectively. 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 first lens has a concave surface S7 on the side closest to the display device, and a convex surface S6 on the side closest to the display device. The second lens has a concave surface S5 on the side closest to the display device, and a convex surface S3 on the side closest to the display device. The third lens has a concave surface S2 on the side closest to the display device, and a convex surface S1 on the side closest to the display device.

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

[0107] Formula (1).

[0108] Where x is the distance from the aspheric surface vertex to the aspheric surface at a height h along the optical axis; c is the paraxial curvature of the aspheric surface, where c = 1 / R, meaning that the paraxial curvature c is the reciprocal of the radius of curvature R in Table 1 above; k is the conic coefficient; and Ai is the correction factor for the i-th order of the aspheric surface. Table 2 below lists the higher-order coefficients applicable to the aspheric surfaces S1-S7 in Example 1.

[0109] Table 2

[0110]

[0111] This example can effectively reduce aberrations such as distortion and astigmatism in the system, improve image quality, and achieve a field of view of up to 30°.

[0112] Example 2

[0113] Table 3 below shows the basic structural parameters of the beam shaping lens assembly for Example 2. The units for curvature radius, thickness / distance, and focal length are all in millimeters. In the table below, the lens surface closest to the display is labeled S7. Similarly, from the display to the light-emitting side of the optical engine module, the lens surfaces are labeled S7, S6, S5, S4, S3, S2, and S1, respectively. 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 first lens has a concave surface S7 on the side closest to the display device, and a convex surface S6 on the side closest to the display device. The second lens has a concave surface S5 on the side closest to the display device, and a convex surface S3 on the side closest to the display device. The third lens has a concave surface S2 on the side closest to the display device, and a convex surface S1 on the side closest to the display device.

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

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

[0120] Table 4

[0121]

[0122] This example can effectively reduce system aberrations such as distortion and astigmatism, improve image quality, and achieve a field of view of up to 25°.

[0123] Example 3

[0124] Table 5 below shows the basic structural parameters of the beam shaping lens assembly for Example 3. The units for curvature radius, thickness / distance, and focal length are all in millimeters. In the table below, the lens surface closest to the display is labeled S7. Similarly, from the display to the light-emitting side of the optical engine module, the lens surfaces are labeled S7, S6, S5, S4, S3, S2, and S1, respectively. S4 represents the reflective 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 first lens has a concave surface S7 on the side closest to the display device, and a convex surface S6 on the side closest to the display device. The second lens has a concave surface S5 on the side closest to the display device, and a convex surface S3 on the side closest to the display device. The third lens has a concave surface S2 on the side closest to the display device, and a convex surface S1 on the side closest to the display device.

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

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

[0131] Table 6

[0132]

[0133] This example effectively reduces aberrations such as distortion and field curvature, improving image quality and achieving a field of view of up to 28°. Furthermore, the adoption of a "positive-positive-negative" optical power distribution architecture, with the positive power front group and the negative power rear group separated, facilitates system length reduction, resulting in a more compact structure compared to the other two embodiments.

[0134] In summary, the optical power of the first lens 120 of the present 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 machine 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 needs of different application scenarios can be met, thereby improving the versatility and adaptability of the optical engine module 80.

[0136] like Figures 5 to 7 As shown, the present invention also provides a near-eye display device, which includes the above-mentioned optical machine module 80 and optical waveguide display module. The optical waveguide display module includes a waveguide 20 and a coupling element 220 and a coupling element 230 arranged on the waveguide 20. The light beam emitted by the optical machine module 80 is introduced into the waveguide 20 through the coupling element 220, and is emitted to the human eye by the coupling element 230 after total reflection transmission in the waveguide 20.

[0137] exist Figure 5 In an optional embodiment shown, the near-eye display device of the present application utilizes the aforementioned optomechanical module 80, which facilitates its lengthwise reduction. Furthermore, the display device 110 is positioned perpendicular to the waveguide 20, further facilitating a compact structure and ease of assembly. The parallel light beam output by the optomechanical module 80 is coupled into the waveguide 20 via the incoupling element 220, where it undergoes total internal reflection and propagates within the waveguide 20. It is then coupled out by the outcoupling element 230 and enters the human eye, forming a virtual image.

[0138] Specifically, the coupling-in element 220 and the coupling-out element 230 are both angle multiplexing gratings, which are made based on angle multiplexing technology. The image light beam incident on the waveguide 20 is divided into multiple angle intervals, and the ranges of the multiple angle intervals are equal or unequal. The coupling-in element 220 is divided into multiple coupling-in grating areas, and the coupling-out element 230 is divided into multiple coupling-out grating areas, and the multiple coupling-in grating areas correspond one to one with the multiple coupling-out grating areas. Each coupling-in grating area is used to couple the image light beam within the corresponding angle interval into the waveguide 20, and each coupling-out grating area is used to receive the light beam of the corresponding angle interval transmitted from the corresponding coupling-in grating area. The angle interval of the image light beam incident on the optical waveguide display module is greater than or equal to 20° and less than or equal to 30°, preferably 25°.

[0139] refer to Figure 6As shown in FIG, the coupling element 220 and the coupling element 230 are both angle-multiplexed volume holographic gratings. A holographic film is exposed using a holographic exposure method to obtain a volume holographic grating. In the process of producing a volume holographic grating, a holographic film is exposed N times using a light beam of the same wavelength at N sets of different exposure angles to produce an angle-multiplexed volume holographic grating. In the present application, N is preferably 3. That is to say, the coupling-in element 220 is divided into three coupling-in grating areas, and the coupling-out element 230 is divided into three coupling-out grating areas. The first coupling-in grating area is used to couple in a first light beam within a first angle range, and make the first light beam undergo total reflection in the waveguide 20 and propagate to the first coupling-out grating area, and then couple out to the human eye through it; the second coupling-in grating area is used to couple in a second light beam within a second angle range, and make the second light beam undergo total reflection in the waveguide 20 and propagate to the second coupling-out grating area, and then couple out to the human eye through it; the third coupling-in grating area is used to couple in a third light beam within a third angle range, and make the third light beam undergo total reflection in the waveguide 20 and propagate to the third coupling-out grating area, and then couple out to the human eye through it.

[0140] Optionally, the response angle interval ranges of the respective coupling-in grating regions may be the same or different, and may be set according to actual conditions.

[0141] Of course, in practical applications, the method of producing angle-multiplexed gratings by multi-angle exposure as described in the present application can be used to achieve a wide field of view display. For example, stacking multiple separately exposed gratings from top to bottom can also achieve the effect of a wide field of view display. However, compared with the method of the present application, the operation is more complicated and the alignment of multiple gratings needs to be considered.

[0142] like Figure 5 As shown, the coupling-in element 220 and the coupling-out element 230 are spaced apart on the same side surface of the waveguide 20, and the coupling-in element 220 and the coupling-out element 230 are located on the side of the waveguide 20 facing away from the optical-mechanical module 80. By arranging the coupling-in element 220 and the coupling-out element 230 on the same side of the waveguide 20, there is no need to consider the component layout and optical path direction on both sides of the waveguide 20 during optical path design, making the overall optical path simpler. At the same time, physical obstacles and unnecessary optical path turns in the light beam transmission path are reduced, thereby reducing light beam loss during transmission, improving optical efficiency, and ensuring the brightness and clarity of the final image. At the same time, the relative positional relationship between the optical-mechanical module 80 and the waveguide 20 is ensured to better match actual applications.

[0143] Specifically, the coupling element 220 and the coupling element 230 have the same period. By using angle-multiplexed gratings to expand the angular bandwidth of the grating, incident light beams within the field of view can be coupled into the waveguide 20 with high and balanced diffraction efficiency. This also allows for more effective control of the volume of the optical waveguide display module, simplifying the implementation.

[0144] exist Figure 7 In another optional embodiment shown, the coupling element 220 is an coupling grating, specifically a volume holographic grating; the coupling element 230 is an outcoupling grating, specifically a volume holographic grating; the coupling grating is disposed on a surface of the waveguide 20 facing away from the optical-mechanical module 80. The waveguide 20 has an inclined surface 211, which forms an acute or obtuse angle with a surface of the waveguide 20. A pair of opposing sides of the inclined surface 211 are connected to two side surfaces of the waveguide 20, respectively. The outcoupling grating is disposed on the inclined surface 211. Optionally, the coupling grating and the outcoupling grating can be angle-multiplexing gratings or ordinary gratings without angle-multiplexing functionality.

[0145] Specifically, the optical waveguide display module also includes a compensating mirror 3, which is bonded to the inclined surface 211 of the waveguide 20. An outcoupling grating is sandwiched between the inclined surface 211 of the waveguide 20 and the compensating mirror 3. The compensating mirror 3 is used to allow external light to enter the human eye normally, preventing the human eye from observing a distorted external scene. External light enters the human eye by passing through the compensating mirror 3, the outcoupling grating, and the waveguide 20 in sequence. The compensating mirror 3, waveguide 20, and the outcoupling grating form a single integrated device that is equivalent to flat glass, thus preventing the human eye from observing a distorted external scene.

[0146] like Figure 8 、 Figure 11-18 and Figures 31-33 As shown, the present invention further provides smart glasses, comprising a frame 10 and the aforementioned near-eye display device. The frame 10 comprises a front frame 12 and a rear frame 11, with the waveguide 20 of the near-eye display device mounted between the front frame 12 and the rear frame 11. The smart glasses further comprise an optical mechanical housing 81 and an optical bracket 82. The optical mechanical housing 81 is disposed within the frame 10 and is used to secure the optical mechanical module 80 of the near-eye display device. The optical mechanical housing 81 is mounted on the waveguide 20 via the optical bracket 82. Furthermore, the display device 110 of the optical mechanical module 80 is perpendicular to the waveguide 20 of the optical waveguide display module.

[0147] like Figure 9 As shown, the present invention also provides a smart swimming goggle, comprising 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, which is a plane or a curved surface, and the curved surface includes a spherical surface or an aspherical surface. The surface is arranged obliquely to the upper and lower surfaces of the waveguide 20. Specifically, the surface and the side surface of the waveguide 20 form an acute angle or an obtuse angle. The coupling 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 is arranged at an acute angle or an obtuse angle with the waveguide 20.

[0148] In this embodiment, the volume holographic grating is a planar device with optical power that diffracts target light incident on its surface, independently changing the exit direction of target light rays with different incident angles. Its two side surfaces can be glued to the inclined surface 211 of the waveguide 20 and the compensation mirror 3, respectively. The holographic volume grating exhibits both wavelength and angle selectivity, efficiently diffracting light of specific wavelengths and angles while efficiently transmitting light at other angles. Compared to beam splitters with a fixed reflectivity-transmittance ratio, this enables brighter image display and more efficient transmission of external light. By modulating the incident light field, the volume holographic grating can produce a light field with arbitrary intensity distribution on the far-field imaging plane.

[0149] like Figure 11 and Figure 18 As shown, the frame 10 of the smart glasses 100 includes a rear frame 11 and a front frame 12, with the front frame 12 mounted on the rear frame 11. At least a portion 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 a half-frame structure; when the entire 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 a full-frame structure. Preferably, the front frame 12 and the rear frame 11 of the present application are a half-frame structure, such as Figures 11 to 15 The example shows a case where the front frame 12 and the rear frame 11 are semi-frame structures. Compared with the full-frame structure, the semi-frame structure can reduce the overall weight of the smart glasses, make it more convenient for users to wear, reduce the pressure and discomfort of wearing, and at the same time appear lighter in visual effect.

[0151] When assembling the waveguide 20 onto the frame 10, simply aligning the positioning groove 21 with the positioning protrusion 111 allows the waveguide 20 to be positioned on the frame 10 without requiring complex adjustments and alignment. The arrangement of the positioning protrusion 111 and the positioning groove 21 allows for quick and accurate installation of the waveguide 20, simplifying the assembly process and improving assembly efficiency.

[0152] In this embodiment, if Figures 11 to 17As shown, the specific functions of the smart glasses 100 are not strictly limited and can be referenced in the prior art, so further explanation is not given here. For example, the smart glasses 100 integrate multiple functions, such as displaying information, navigating, and taking photos. The smart glasses 100 include two waveguides 20, both mounted on the frame 10. The waveguides 20 are key components of the smart glasses 100, responsible for guiding image light to the user's eyes. Furthermore, the smart glasses 100 include two temples 40, both mounted on the frame 10. The temples 40 can be connected to the frame 10 via screws, clips, or hinges.

[0153] In this embodiment, if Figures 11 to 16 As shown, when a 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, if Figures 11 to 16 As shown, a mounting groove 13 for mounting 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. The front frame 12 and the rear frame 11 are half-wrapped around the waveguide 20 to further secure the waveguide 20 and prevent it from shifting or falling off during use.

[0155] In this embodiment, if Figures 11 to 18 As shown, the front frame 12 and the rear frame 11 are secured together by snapping and / or gluing. For example, a snap-fit ​​structure 30 is disposed between the front frame 12 and the rear frame 11 to facilitate assembly and disassembly of the front frame 12 and the rear frame 11. The structure of the snap-fit ​​structure 30 may refer to prior art; for example, the snap-fit ​​structure 30 includes a slot 32 and a tongue 31 that snaps into the slot 32. The slot 32 and tongue 31 are respectively provided on the front frame 12 and the rear frame 11. For another example, one of the front frame 12 and the rear frame 11 may be provided with a glue groove, and the other may be provided with a latch. The latch latch is inserted into the glue groove and secured by glue, thereby achieving assembly of the front frame 12 and the rear frame 11.

[0156] In this embodiment, if Figures 11 to 16 As shown, the waveguide 20 is fixed between the front frame 12 and the rear frame 11 by gluing, which ensures a close fit and stable connection between the waveguide 20 and the front frame 12 and the rear frame 11 , and also enhances the stable connection between the front frame 12 and the rear frame 11 .

[0157] In this embodiment, if Figures 11 to 16As shown, at least one of the front frame 12 and the rear frame 11 has an adhesive surface 14, which is adhered to the waveguide 20 by dispensing glue. The adhesive surface 14 adheres to the waveguide 20 to ensure that the position of the waveguide 20 is stable during installation and prevent it from shifting during assembly or use.

[0158] In this embodiment, if Figures 11 to 16 As shown, at least one of the front frame 12 and the rear frame 11 has a glue overflow surface 15. A gap is set between the glue overflow surface 15 and the waveguide 20. This allows excess glue to enter the glue overflow surface 15 during the gluing and assembly process of the waveguide 20 and the adhesive surface 14, preventing the glue from overflowing to unwanted areas and affecting the assembly and performance of the smart glasses. The glue overflow surface 15 is used to further fix the waveguide 20 by collecting excess glue. This design not only strengthens 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 glue overflow surface 15, the waveguide 20 is firmly installed, while ensuring a good display effect and user experience.

[0159] In this embodiment, if Figures 11 to 16 As shown, both the front frame 12 and the rear frame 11 have adhesive surfaces 14; these adhesive surfaces 14 on the front frame 12 and the rear frame 11 are located on either side of the waveguide 20, further enhancing the strength and stability of the connection between the waveguide 20 and the frame. With dual support and fixation by the front frame 12 and the rear frame 11, the waveguide 20 is less likely to shift or deform during installation and use. The adhesive fixation of the waveguide 20 between the front frame 12 and the rear frame 11 simplifies the assembly process of the smart glasses 100, making the connection between the front frame 12 and the rear frame 11 simpler and more efficient.

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

[0161] In this embodiment, if Figures 15 to 17 As shown, the waveguide 20 has an outwardly convex extension portion 22, which is a positioning protrusion 111 or a positioning groove 21 is formed on the extension portion 22. The provision of the extension portion 22 can ensure the integrity of the edge of the waveguide 20.

[0162] In this embodiment, if Figures 11 to 17As shown, the positioning groove 21 is a hole extending through the waveguide 20, a recessed structure formed by a depression in the sidewall of the waveguide 20, or a recessed structure formed by a depression in the rear frame 11. The positioning protrusion 111 is integrally provided with the rear frame 11 or the waveguide 20 to enhance the structural strength of the positioning protrusion 111 and the rear frame 11 or the waveguide 20 and to reduce the difficulty of manufacturing 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, if Figures 12 to 13 As shown, the number of positioning protrusions 111 and positioning grooves 21 is not strictly limited; for example, the number of positioning protrusions 111 and positioning grooves 21 is 1, 2, 3 and 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 positioning grooves 21 and 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, ensuring its correct alignment and fixation with the front frame 12 and the rear frame 11. Of course, in other embodiments, such as Figures 16 and 17 As shown, there are two extensions 22 on the waveguide 20, one of which is provided with a positioning groove 21, and the other is provided with a positioning protrusion 111. The rear frame 11 has a positioning groove 21 and a positioning protrusion 111. The positioning groove 21 on the waveguide 20 mates with the positioning protrusion 111 on the rear frame 11, and the positioning groove 21 on the rear frame 11 mates with the positioning protrusion 111 on the waveguide 20.

[0164] like Figures 11 to 18 As shown, the present application also provides a smart glasses 100, including a frame 10 and a waveguide 20, the frame 10 including a rear frame 11 and a front frame 12 installed on the rear frame 11; 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 frame 10 on the outer edge of the waveguide 20 does not exceed two-thirds of its outer edge, so as to reduce the weight of the frame 10.

[0165] Compared with the outer edge of the waveguide 20 being completely wrapped by the frame 10, the outer edge of the waveguide 20 of the present application is partially wrapped by the frame 10. Since some frame materials are reduced, the weight is lighter. The lighter weight can reduce the burden on the bridge of the nose and the ears, and improve wearing comfort; the (lower half) part of the waveguide 20 not wrapped by the frame 10 is not restricted by the frame, which can reduce the obstruction of the user's line of sight by the edge of the frame, and can provide the user with a wider downward field of view, allowing the user to more naturally focus on the fusion of the real world and virtual information.

[0166] In this embodiment, if Figures 11 to 46 As shown, the specific functions of the smart glasses 100 are not strictly limited and can be referred to in the prior art, so further explanation is not given here. For example, the smart glasses 100 integrate multiple functions, such as displaying information, navigating, and taking photos. The smart glasses 100 include at least one waveguide 20; the waveguide 20 is a key component of the smart glasses 100 and is responsible for guiding image light to the user's eyes.

[0167] In this embodiment, if Figures 11 to 46 As shown, the smart glasses 100 include two temples 40, both mounted on the frame 10. The temples 40 can be connected to the frame 10 via screws, buckles, or a hinge. The temples 40 are generally rod-shaped, so they have a length in space. There are two temples 40, one located on either side of the frame 10. When the temples 40 rotate relative to the frame 10, the smart glasses 100 can be in an unfolded state or a folded state. The tails of the temples 40 are provided with holes for attaching straps. By providing these holes, the user can secure the straps to the smart glasses 100 through the holes. During use, the straps are secured to the back of the user's head, reducing the weight on the ears and effectively preventing the smart glasses 100 from accidentally falling off. This improves the wearer's stability, particularly during exercise, strenuous activities, or special usage scenarios. In other embodiments, a heart rate sensor is provided on the temple 40 . The heart rate sensor may be integrally provided on the temple or detachably provided on the temple. Preferably, the heart rate sensor is provided at the tail of the temple 40 .

[0168] In this embodiment, if Figures 11 to 46As shown, the frame 10 includes two lens frames 16 and a bridge portion 17 connecting the two lens frames 16. Two temples 40 are respectively mounted on the corresponding lens frames 16. The structure of the lens frames 16 is not strictly limited, as long as the lens frames 16 can support the waveguide 20. For example, the lens frames 16 are annular or semi-annular and are arranged around the outer circumference 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 frames 16. For example, the bridge portion 17 is generally strip-shaped. One or more sensors can be installed on the bridge portion 17. For example, a geomagnetic sensor, an accelerometer, and a gyroscope can be installed in the bridge portion 17. The accelerometer and gyroscope are used to collect acceleration and angular velocity information of the user's head, such as head acceleration and angular velocity, so as to infer the wearer's movement posture and movement trajectory. The geomagnetic sensor can detect the strength and direction of the Earth's magnetic field. During outdoor activities such as hiking, mountaineering, and cycling, the wearer can use the geomagnetic sensor on the smart glasses 100 to determine the direction of travel. In addition, an ultraviolet sensor may be provided on the surface of the bridge portion 17 , and the ultraviolet sensor is used to monitor the intensity of ultraviolet rays in the environment and provide ultraviolet protection reminders to the wearer.

[0169] In this embodiment, if Figures 11 to 12 As shown, the frame 10 is a semi-frame structure; the bottom of the frame 10 does not wrap around the waveguide 20, so that the lens holder 16 in the frame 10 is roughly C-shaped. Preferably, along the outer edge of the waveguide 20, the frame 10 wraps around no more than half of the outer edge of the waveguide 20, which can reduce the weight of the frame 10 by at least 35%.

[0170] In this embodiment, if Figures 11 to 18 As shown, 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. The structure of the frame 10 and the specific connection method between the frame 10 and the waveguide 20 are all based on the description of the above embodiments and will not be further elaborated here.

[0171] In this embodiment, if Figures 19 to 24 As shown, the smart glasses 100 also include at least one expansion mirror assembly 50, which includes an expansion mirror 51 and a clamping member 52. The expansion mirror 51 can be clamped to the frame 10 via the clamping member 52. The smart glasses 100 and the expansion mirror assembly 50 can be designed separately, which can reduce maintenance costs and increase upgrade flexibility. Users can replace or upgrade the expansion mirror assembly 50 as needed without having to replace the entire device. This design reduces material waste and can be customized to meet different functional requirements, improving the product's market adaptability.

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

[0173] In this embodiment, if Figures 23 to 25 As shown, when the expansion lens 51 is a corrective lens, it can be positioned opposite the waveguide 20, allowing the smart glasses 100 to 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 positioned inside the waveguide 20, allowing the user to clearly see both the real environment and the augmented reality display. Of course, the corrective lens can also be positioned outside the waveguide 20, allowing the user to clearly see the real environment.

[0174] In other embodiments, Figures 23 to 24 As shown, when there are two expansion mirror assemblies 50 , one expansion mirror 51 is a shading lens, and the other expansion mirror 51 is a corrective lens. The shading lens is located on the front side of the frame 10 , and the corrective lens is located on the back side of the frame 10 .

[0175] In this embodiment, if Figures 19 to 24 As shown, the snap-fitting member 52 can be snapped onto the bridge portion 17. This eliminates the need for additional components in the smart glasses 100 to secure the bridge portion 17 to the snap-fitting member 52, thereby reducing the cost of the smart glasses 100. The expansion lens 51 can be quickly and stably snapped onto the bridge portion 17 via the snap-fitting member 52, allowing the expansion lens assembly 50 to be stably mounted on the smart glasses 100, making it easy for the user to easily install or remove the expansion lens 51 from the smart glasses 100. When the expansion lens assembly 50 is mounted 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 in the middle, ensuring the stability of the smart glasses 100.

[0176] In this embodiment, if Figures 19 to 24 As shown, the shape of the clamping member 52 is not strictly limited, as long as the clamping member 52 can be clamped and fixed on the bridge portion 17. The clamping member 52 is made of a non-magnetic material to avoid interference with the geomagnetic sensor in the smart glasses 100. Further preferably, the clamping member 52 is made of a non-metallic material. Non-metallic materials help reduce the overall weight and improve wearing comfort, which is particularly important for smart glasses 100 that are worn for long periods of time. In addition, non-metallic materials have good elasticity and durability, which makes it more convenient for users to install or remove the expansion lens 51. It can also adapt to bridge portions 17 of different sizes to ensure a tight fit between the clamping member 52 and the bridge portion 17. For example, the clamping member 52 can be made of plastic, rubber, etc.

[0177] In this embodiment, if Figures 19 to 22 As shown, the clamping member 52 has a connecting groove 525, within which a portion of the expansion lens 51 is located and secured by clamping or bonding. Preferably, the expansion lens 51 can be secured to the connecting groove 525 of the clamping member 52 using an adhesive to ensure stability and durability. This securement method is both secure and discreet, without affecting the appearance of the smart glasses 100. The clamping member 52 has a clearance 526 that exposes the UV sensor located on the bridge portion 17, ensuring that the expansion lens assembly 50 does not affect the normal operation of other functional modules.

[0178] In this embodiment, if Figures 19 to 22 As shown, the clamping member 52 is generally C-shaped. It has a clamping slot 521 that engages with the bridging portion 17 to secure the clamping member 52 to the bridging portion 17. Simply applying force to the clamping member 52 to deform it allows the bridging portion 17 to be removed from or inserted into the clamping slot 521. The shape and size of the clamping slot 521 match those of the bridging portion 17, ensuring that the clamping member 52 is securely fixed to the bridging portion 17.

[0179] In this embodiment, if Figures 19 to 22 As shown, the wall of the clamping groove 521 is generally C-shaped. This design not only ensures the stability of the structure and effectively prevents the expansion mirror 51 from separating from the bridge portion 17, but also facilitates the installation and removal of the expansion mirror 51. In addition, this structure not only facilitates the entry and exit of the bridge portion 17, but also provides a certain elastic pressure after the clamping, ensuring a tight fit between the clamping member 52 and the bridge portion 17. The clamping groove 521 has an opening for the bridge portion 17 to enter and exit, and the opening is set away from the expansion mirror 51. The C-shaped structural design of the clamping member 52 enables it to fit tightly against the bridge portion 17, while leaving an opening for the bridge portion 17 to enter and exit.

[0180] In this embodiment, if Figures 19 to 22 As shown, the clamping member 52 includes a main body 523 and two clamping portions 524. The two clamping portions 524 are located on either side of the main body 523 and extend toward each other to form a clamping groove 521 together with the main body 523. An opening is formed between the two clamping portions 524 for the bridge portion 17 to enter and exit. The main body 523 serves as the supporting structure of the clamping member 52 and has sufficient strength and rigidity to ensure stable installation of the expansion mirror assembly 50. The opening is formed between the two clamping portions 524 for the bridge portion 17 to enter and exit.

[0181] In this embodiment, if Figures 19 to 22As shown, the bridge portion 17 has a guide surface 171 for guiding the clamping portion 524 to snap into place. This design improves the accuracy and convenience of installation. The guide surface 171 can be designed as a bevel or a curved surface, so as to guide the clamping portion 524 to smoothly snap into the bridge portion 17 during the installation of the clamping member 52. The addition of the guide surface 171 allows the user to easily complete the installation of the clamping member 52 without precise alignment, greatly improving the installation efficiency. There are two guide surfaces 171, and the two guide surfaces 171 are respectively located on opposite sides of the bridge portion 17. The two guide surfaces 171 can respectively guide the clamping portion 524 to smoothly snap into the bridge portion 17.

[0182] Of course, in other embodiments, such as Figures 23 to 24 As shown, the bridge portion 17 has a second slot 172, into which the engaging member 52 engages, thereby securing the extension lens 51 to the frame 10. This eliminates the need for additional components in the smart glasses 100 to secure the bridge portion 17 to the engaging member 52, reducing the cost of the smart glasses 100. At least a portion of the engaging member 52 can extend into and engage with the second slot 172. Specifically, the engaging member 52 includes a engaging base 527 and a engaging protrusion 528 located on one side of the engaging base 527. The inner wall of the second slot 172 is formed with an engaging groove 173. When the engaging base 527 extends into the second slot 172, the engaging protrusion 528 engages with the engaging groove 173, thereby confining the engaging member 52 within the second slot 172. The clamping base 527 is generally block-shaped. The second clamping slot 172 is shaped similarly to the clamping base 527 to prevent the clamping base 527 from shaking when located within the second clamping slot 172. The clamping protrusion 528 is generally spherical, allowing it to pass through the second clamping slot 172 and into the clamping groove 173. The clamping groove 173 is shaped similarly to the clamping protrusion 528 to prevent it from shaking when located within the clamping groove 173. There are two clamping protrusions 528, one located on opposite sides of the clamping base 527. To ensure that the clamping protrusion 528 passes through the second clamping slot 172 and into the clamping groove 173, the clamping protrusion 528 is mounted on the clamping base 527 via a spring. Specifically, the engaging base 527 has a mounting channel, and the two engaging protrusions 528 are both located within the mounting channel. A spring is disposed between the two engaging protrusions 528 or between the engaging protrusions 528 and the mounting channel. When the engaging protrusions 528 pass through the second engaging slot 172, the two engaging protrusions 528 can compress the spring. When the engaging protrusions 528 are located within the engaging groove 173, the spring returns, forcing the two engaging protrusions 528 to remain within the engaging groove 173.

[0183] In this embodiment, if Figures 25 to 29As shown, the smart glasses 100 also include nose pads 70, which are detachably connected to the frame 10 via connecting members 73, enabling quick assembly and disassembly of the nose pads 70. This design not only facilitates user replacement of the nose pads 70 as needed, but also enhances the flexibility and practicality of the smart glasses 100. Specifically, the nose pads 70 are detachably connected to the bridge portion 17 via connecting members 73.

[0184] In this embodiment, if Figures 25 to 29 As shown, the nose pad 70 is generally V-shaped and comprises a main body and two nose blades (not shown) connected to the main body. The first connecting portion 731 of the connecting member 73 is affixed to the main body. The first connecting portion 731 is secured to the main body by adhesive bonding, welding, or screws. The two nose blades are fixedly or flexibly connected to the main body. In other embodiments, a heart rate sensor is provided on the side of the nose blade near the nose wing.

[0185] In this embodiment, if Figures 25 to 29 As shown, the 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 fixed 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 frame 10 in a first direction; the second connecting portion 732 is fixed 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 frame 10 in a second direction different from the first direction. By restricting the movement of the nose pad 70 in the first and second directions, the relative position of the nose pad 70 and the frame 10 can be fixed. The first direction and the second direction can be perpendicular to each other.

[0186] In this embodiment, if Figures 25 to 29 As 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 engages with the first mating portion 18 to restrict the sliding of the second connecting portion 732. The first connecting portion 731 can move along with the second connecting portion 732 in the first direction and has a locked state and a released state in the first direction. In the locked state, the first connecting portion 731 can engage with the first mating portion 18. In the released state, the first connecting portion 731 can move along with the second connecting portion 732.

[0187] In this embodiment, if Figures 25 to 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. The first connecting portion 731 and the second connecting portion 732 are both block-shaped structures; the first connecting portion 731 and the second connecting portion 732 can be arranged as a whole.

[0188] In this embodiment, if Figures 25 to 29 As shown, the first mating portion 18 includes a mating groove 181, and the first connecting portion 731 can be located in the mating groove 181 and engaged with the mating groove 181. In the locked state, the first connecting portion 731 can be engaged with the mating groove 181 to limit the movement of the first connecting portion 731. In the released state, the first connecting portion 731 can be in a non-engaged state with the mating groove 181, so that it can move with the second connecting portion 732.

[0189] In this embodiment, if Figures 25 to 29 As shown, one of the inner wall of the mating groove 181 and the first connecting portion 731 is provided with a block 733, and the other is provided with a first slot 182. The block 733 can engage with the first slot 182. When the nose pad 70 is mounted on the frame 10, the first connecting portion 731 moves along with the second connecting portion 732 in the first direction until the block 733 engages with the first slot 182, thereby restricting the movement of the first connecting portion 731 in the first direction. When the nose pad 70 is removed from the frame 10, the first connecting portion 731 moves along with the second connecting portion 732 in the first direction until the block 733 disengages from the first slot 182, thereby releasing the movement of the first connecting portion 731 in the first direction.

[0190] In this embodiment, if Figures 25 to 29 As shown, one of the inner wall of the limiting groove 191 and the second connecting portion 732 is provided with a block 733, and the other is provided with a first slot 182, and the block 733 can engage with the first slot 182. When the nose pad 70 is mounted on the frame 10, the first connecting portion 731 moves along with the second connecting portion 732 in the first direction until the block 733 engages with the first slot 182, thereby limiting the movement of the second connecting portion 732 in the first direction. When the nose pad 70 is removed from the frame 10, the first connecting portion 731 moves along with the second connecting portion 732 in the first direction until the block 733 disengages from the first slot 182, thereby releasing the movement of the second connecting portion 732 in the first direction.

[0191] In this embodiment, if Figures 25 to 29As shown, there are two latching blocks 733, each disposed on opposite sides of the first connecting portion 731 or the second connecting portion 732. There are two first latching slots 182, each disposed on opposite side walls of the mating slot 181 or the retaining slot 191. The two latching blocks 733 can engage with the corresponding first latching slots 182. When the nose pad 70 is mounted on the frame 10, the two latching blocks 733 are disposed along the second direction, and the two first latching slots 182 are disposed along the second direction. The first latching slots 182 are formed by a partial depression in the sidewall of the mating slot 181 or the retaining slot 191, and the latching blocks 733 are formed by a partial protrusion on the sidewall of the first connecting portion 731 or the second connecting portion 732.

[0192] In this embodiment, if Figures 25 to 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 Figures 25 to 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 Figures 25 to 29 As shown, the limiting groove 191 extends upward from the bottom of the frame 10 and is open at the bottom of the frame 10; when wearing the smart glasses 100, the frame 10 will apply a downward force to the nose pad 70. The limiting groove 191 is open at the bottom of the frame 10, which can avoid the problem of the nose pad 70 being forced to separate from the limiting groove 191, making the installation of the nose pad 70 more stable.

[0195] In this embodiment, if Figures 25 to 29 As shown, the limiting groove 191 is connected to the mating groove 181 and is arranged along the second direction. Along the second direction, the width of the mating groove 181 is smaller than the width of the limiting groove 191, which provides better stability and firmness of the second connecting portion 732 within the limiting groove 191, preventing it from falling off one side of the mating 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 the nose pad 70 is installed on the frame 10, a force is applied to the nose pad 70, and 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 with the second connecting portion 732; until the block 733 is engaged with the first slot 182, at which time the movement of the first connecting portion 731 and the second connecting portion 732 stops, so that the nose pad 70 can be installed on the frame 10.

[0198] When removing the nose pad 70 from the frame 10, an action is applied to the nose pad 70, first separating the block 733 from the first slot 182, and then the first connecting portion 731 slides along the matching slot 181 and the second connecting portion 732 slides along the limiting slot 191 until the first connecting portion 731 slides out of the matching slot 181 and the second connecting portion 732 slides out of the limiting slot 191. At this time, the nose pad 70 is removed from the frame 10.

[0199] In this embodiment, if Figures 30 to 33 As shown, the smart glasses 100 also include an optical mechanical housing 81 and an optical bracket 82. The optical mechanical housing 81 is disposed within the frame 10 and is used to secure the optical mechanical module 80. The optical mechanical housing 81 is mounted on the waveguide 20 via the optical bracket 82. The waveguide 20 has an incoupling element and an outcoupling element. The optical mechanical module 80 includes a display device and a lens assembly. The light beam emitted by the display device is shaped by the lens assembly and then incident on the incoupling element of the waveguide 20. The light beam coupled into the waveguide 20 by the incoupling element is transmitted within the waveguide by total internal reflection and then coupled out to the human eye through the outcoupling element.

[0200] The detachable connection between the optical bracket 82 and the optical mechanical housing 81 enables quick disassembly between the waveguide 20 and the optical mechanical housing 81, facilitating replacement of the waveguide 20 or the optical mechanical housing 81, thereby reducing maintenance costs and difficulty. Furthermore, the optical bracket 82 has a simple structure, and during production, the optical bracket 82 can be replaced with a corresponding tilt angle according to the requirements of the usage scenario, avoiding the expensive and complex replacement of the optical mechanical housing 81 and reducing production costs. Furthermore, for smart glasses products that do not have design requirements for the forward tilt angle, the optical mechanical housing 81 and the optical mechanical module therein can be directly applied. Simply remove the optical bracket 82, eliminating the need to redesign the optical mechanical module and the optical mechanical housing 81.

[0201] In this embodiment, if Figures 30 to 33 As shown, the frame 10 has an installation chamber 101, and the optical mechanism housing 81 is located within the installation chamber 101. The optical mechanism housing 81 is directly embedded and installed inside the frame 10, preventing leakage, making the smart glasses 100 more compact and aesthetically pleasing. In other embodiments, to further ensure the secure installation of the optical mechanism housing 81, the optical mechanism housing 81 can be bonded to the installation chamber 101.

[0202] In this embodiment, if Figures 30 to 33As shown, the optical bracket 82 is snap-fitted to the optical mechanical housing 81. This design makes the connection between the optical bracket 82 and the optical mechanical housing 81 more secure and reliable, while also facilitating removal and replacement by the user. Specifically, one of the optical bracket 82 and the optical mechanical housing 81 is provided with a snap-fitting protrusion 811, and the other is provided with a third snap-fitting slot 821 that snaps into the snap-fitting protrusion 811. For example, the optical bracket 82 is provided with the third snap-fitting slot 821, and the optical mechanical housing 81 is provided with the snap-fitting protrusion 811.

[0203] In this embodiment, if Figures 30 to 33 As shown, the optical mechanism housing 81 has a light outlet 812, and the optical bracket 82 has a light passage 825 connected to the light outlet 812. At least a portion of the optical mechanism housing 81 extends into the light passage 825, which can ensure a stable connection between the optical bracket 82 and the optical mechanism housing 81. In addition, it can also prevent the optical bracket 82 and the optical mechanism 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 mechanism housing 81 with the light passage 825 of the optical bracket 82, and then push the optical mechanism housing 81 or the optical bracket 82 so that the optical mechanism housing 81 moves along the light passage 825 until the engaging protrusion 811 engages with the third engaging groove 821. The connection between the two is completed. The operation is simple and quick, and does not require complex tools or professional skills. The light beam emitted from the display device in the optical engine 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 Figures 30 to 33 As shown, the optical bracket 82 has a first adhesive surface 822, which is fixed to the waveguide 20 by dispensing glue. The first adhesive surface 822 is in contact with the waveguide 20, ensuring the stable position of the waveguide 20 during installation and preventing 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 glue dispensing port 826. The glue dispensing port facilitates the initial positioning of the waveguide 20 on the first adhesive surface 822, and then dispensing glue between the first adhesive surface 822 and the waveguide 20 to further secure it.

[0205] In this embodiment, if Figures 30 to 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 receive excess glue during the gluing process between the waveguide 20 and the first adhesive surface 822, preventing the glue from overflowing into unwanted areas and affecting the assembly and performance of the smart glasses 100. The first glue overflow surface 823 is used to further secure the waveguide 20 with excess glue. This design not only strengthens the connection between the waveguide 20 and the optical bracket 82, but also makes the securing process simpler and more efficient. The cooperation between the first adhesive surface 822 and the first glue overflow surface 823 ensures a secure installation of the waveguide 20 while ensuring a good display effect and user experience.

[0206] In this embodiment, if Figures 30 to 33 As shown, the first adhesive surface 822 is tilted so that the forward tilt angle of the smart glasses 100 is 2 degrees to 150 degrees; by adjusting the forward tilt angle of the smart glasses 100, the user can be more comfortable when wearing the smart glasses 100, and reduce visual fatigue and discomfort caused by too large or too small forward tilt angle.

[0207] In this embodiment, if Figures 30 to 33 As shown, the angle between the first adhesive surface 822 and the vertical direction is 2 degrees to 10 degrees, or the angle between the first adhesive surface 822 and the length direction of the temple 40 is 80 degrees to 88 degrees. By setting such an angle range, the forward tilt angle of the smart glasses 100 can be within the range of 2 degrees to 10 degrees, thereby meeting the needs of different users for wearing comfort and visual experience of the smart glasses 100. Figure 12 As shown, the angle between the first adhesive surface 822 and the vertical direction is a, and the angle between the first adhesive surface 822 and the length direction of the temple 40 is b.

[0208] Preferably, the angle between the first adhesive surface 822 and the vertical direction is 2 to 8 degrees, or the angle between the first adhesive surface 822 and the extension direction of the temple 40 is 82 to 88 degrees, so that the forward tilt angle of the smart glasses 100 is 2 to 8 degrees. This angle range has been shown to provide users with optimal visual effects and wearing comfort in most usage scenarios. Further preferably, the angle between the first adhesive surface 822 and the vertical direction is 2 to 6 degrees, or the angle between the first adhesive surface 822 and the extension direction of the temple 40 is 84 to 88 degrees, so that the forward tilt angle of the smart glasses 100 is 2 to 6 degrees. Specifically, the angle between the first adhesive surface 822 and the vertical direction can be 2°, 3°, 4°, 5°, 6°, or a range consisting of any two values.

[0209] In this embodiment, if Figures 30 to 33As shown, the waveguide 20 has a connecting portion 23 secured to a first adhesive surface 822. The optical support 82 includes a positioning flange 824 located on the outer periphery of the connecting portion 23 to position the waveguide 20 relative to the optical support 82. The coupling element of the waveguide 20 is provided on the connecting portion 23 and corresponds to a light-through port 825 on the optical support 82. During assembly, the positioning flange 824 precisely positions the waveguide 20 relative to the optical support 82, ensuring accurate installation in the desired position. The connecting portion 23 then securely fits against the first adhesive surface 822 and is secured by dispensing glue to ensure a secure connection. A dispensing port 826 is located on the positioning flange 824. In some embodiments, the light outlet 812 of the optical machine housing 81 is generally arranged on one side of the waveguide 20. In order to enable 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, if Figures 30 to 33 As shown, the connection portion 23 is located at the outer edge of the waveguide 20 and is convex. The positioning flange 824 is higher than the first adhesive surface 822 and is roughly flush with the side of the waveguide 20 facing away from the first adhesive surface 822.

[0211] In this embodiment, if Figures 34 to 38 As shown, a mounting cavity 412 for accommodating an electronic module 43 and a through-hole 413 communicating with the mounting cavity 412 are provided in the temple 40; the smart glasses 100 also include a flexible circuit board 44, which passes through the through-hole 413 and is connected to the through-hole 413 by adhesive sealing to be electrically connected to the electronic module in the mounting cavity 412.

[0212] The adhesive seal between vias 413 and the flexible circuit board 44 prevents external moisture from penetrating into the mounting cavity 412, thereby ensuring the proper functioning of the electronic module 43. Specifically, the flexible circuit board 44 passes through vias 413, and the sealed connection between the two effectively prevents moisture from entering the mounting cavity 412 through the gaps between the vias on the flexible circuit board 44 or the temples 40. Vias 413 not only ensures proper circuit connection but also prevents short circuits or damage caused by moisture intrusion, achieving excellent waterproof performance. This significantly enhances the practicality and durability of the smart glasses 100, providing users with a more convenient and safe wearing experience.

[0213] In this embodiment, if Figures 34 to 38As shown, both the electronic module 43 and the flexible printed circuit board 44 can employ existing technical structures. For example, the electronic module 43 may include electronic components such as a microphone, a speaker, a battery, a processor, memory, sensors, a communication module, and electronic buttons. The flexible printed circuit board 44, or FPC, facilitates data transmission and functional control within the electronic module 43. A battery is housed within the temple 40, which supplies power to the optical module 80 and the electronic module 43 via the flexible printed circuit board 44.

[0214] In this embodiment, if Figures 34 to 38 As shown, the temple 40 includes a temple housing 41, and a through hole 413 and a mounting cavity 412 are formed in the temple housing 41. The aperture of the through hole 413 ensures that the flexible circuit board 44 can pass through while minimizing the area connected to the outside world.

[0215] In this embodiment, if Figures 34 to 38 As shown, the smart glasses 100 also include a hinge structure 45, which connects the frame 10 and the temples 40, enabling the temples 40 to rotate relative to the frame 10; when the temples 40 rotate relative to the frame 10, the smart glasses 100 have an unfolded state and a folded state; wherein, the number of the 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 extends through the hinge structure 45. The hinge structure 45 includes a first pivoting portion 451 and a second pivoting portion 452 that rotatably engage with each other. 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, each of the first pivoting portion 451 and the second pivoting portion 452 is provided with a pin hole, through which a pin shaft passes, in sequence, to enable the first pivoting portion 451 and the second pivoting portion 452 to rotatably engage with each other. A clearance is provided between the first pivoting portion 451 and the second pivoting portion 452 for the flexible circuit board 44 to pass through, which cooperates with the shielding portion 42 to prevent the flexible circuit board 44 from being exposed.

[0217] In this embodiment, if Figures 34 to 38 As shown, a shielding portion 42 is further arranged between the frame 10 and the temple 40. When the temple 40 is rotated arbitrarily relative to the frame 10, the shielding portion 42 always shields the flexible circuit board 44 so that the flexible circuit board 44 is not exposed, thereby making the smart glasses 100 more beautiful.

[0218] In this embodiment, if Figures 34 to 38As shown, the shielding portion 42 is mounted on the temple 40 and can extend into the frame 10; when the smart glasses 100 are in the unfolded state, the shielding portion 42 can extend into the frame 10. The shielding portion 42 is arranged in an arc shape; the frame 10 has an arc groove that cooperates with the shielding portion 42. When the temple 40 rotates relative to the frame 10, the shielding portion 42 does not occupy a large space in the frame 10.

[0219] In this embodiment, if Figures 34 to 38 As shown, the shielding portion 42 is integrally provided on the temple 40, thereby strengthening the structure of the shielding portion 42 and the temple 40 and reducing the difficulty of processing the shielding portion 42 and the temple 40. Specifically, the shielding portion 42 is integrally provided on the end plate 416 of the temple 40. The shielding portion 42 is located outside the rotating shaft structure 45 and forms a partial wire passage 417 between the shielding portion 42 and the wire passage gap of the rotating shaft structure 45.

[0220] In this embodiment, if Figures 34 to 38 As shown, one of the frame 10 and the temples 40 is provided with an elastic member 46, and the other is provided with an abutment portion 461 capable of cooperating with the elastic member 46; the elastic member 46 is located outside the rotation axis of the frame 10 and the temples 40. The elastic member 46 is provided for position limiting, and can control the opening and closing angle between the temples 40 and the frame 10, that is, adjust the distance between the two temples 40, expanding the user range. At the same time, it can provide resistance and increase the clamping force on the head, so that the temples 40 fit the user's head, making the user wear the smart glasses 100 more secure and improving the reliability of use.

[0221] In this embodiment, if Figures 34 to 38 As shown, the elastic member 46 includes an elastic member 462 and an abutment block 463. The abutment block 463 is movably attached to the frame 10 or the temple 40 via the elastic member 462 so as to be able to cooperate with the abutment portion 461. The abutment block 463 is provided on the temple 40, and the abutment portion 461 is provided on the frame 10. Specifically, the arc-shaped groove cooperating with the shielding portion 42 is provided on the abutting portion 461, and the abutting portion 461 can be integrally formed with the frame 10, or can be separately provided with the frame 10; in the case where the abutting portion 461 is separately provided with the frame 10, the abutting portion 461 can be detachably connected to the frame 10, and the abutting portion 461 is located between the frame 10 and the temple 40. The abutting portion 461 is provided with an arc-shaped groove connected to the installation chamber 101 of the frame 10, and the shielding portion 42 is slidably connected to the arc-shaped groove. The shielding portion 42 slides along the arc-shaped groove, which improves the sliding accuracy along the preset direction and can prevent slipping.

[0222] In this embodiment, if Figures 34 to 38As shown, the temple 40 further has an active cavity 411 , and the elastic member 462 is installed in the active cavity 411 ; one end of the abutment block 463 is connected to the elastic member 462 , and the other end extends out of the active cavity 411 .

[0223] In this embodiment, if Figures 34 to 38 As shown, the temple 40 is further provided with a partition 415 and an end plate 416. The partition 415 separates the space within the temple 40 into an active cavity 411 and a mounting cavity 412. A through hole 413 is located on the partition 415. The end plate 416 is disposed opposite the partition 415, with the active cavity 411 located between the end plate 416 and the partition 415. The end plate 416 is provided with a wire hole 414 for the flexible circuit board 44 to pass through, and has an opening for the abutment block 463 to slide. The temple 40 includes a front shell 901 and a back cover 902 that snap together. The front shell 901 is located on the side closer to the face, and the back cover 902 is located on the side farther from the face. In this embodiment, the end plate 416 and the back cover 902 are integrally formed.

[0224] In this embodiment, if Figures 34 to 38 As shown, the movable cavity 411 and the mounting cavity 412 are arranged sequentially along the length of the temple, with the movable cavity 411 being closer to the frame 10 than the mounting cavity 412, thereby making the layout of the movable cavity 411 and the mounting cavity 412 more reasonable. Via holes 413 and wire holes 414 are located on both sides of the movable cavity 411, and the movable cavity 411 is connected to the wire holes 414 through the via holes 413. A wire channel 417 is formed between the via holes 413 and the wire holes 414, allowing the flexible circuit board 44 to pass through the temple 40.

[0225] In this embodiment, if Figures 39 to 46 As shown, the smart glasses 100 also include an audio mechanism 90, which is mounted on the temple 40. The audio mechanism 90 includes a main body 91 and a sound-generating device 92. The main body 91 is the temple 40. The main body 91 includes two first side walls 911 disposed opposite each other, and two second side walls 912 connected between the two first side walls 911 and disposed opposite each other. The main body 91 is provided with a receiving cavity 913, a sound outlet 9133, and a sound leakage hole 9134. The sound-generating device 92 is disposed in the receiving cavity 913 via a supporting bracket 93. The sound-generating device 92, the supporting bracket 93, the first side wall 911, and the second side wall 912 cooperate to separate the receiving cavity 913 into a front cavity 9131 and a rear cavity 9132, which are mutually independent. The sound outlet 9133 is configured to connect the front cavity 9131 to the outside world, and the sound leakage hole 9134 is configured to connect the rear cavity 9132 to the outside world.

[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. The audio mechanism can be quickly installed in the main body 91, thereby improving the assembly efficiency of the audio mechanism, and at the same time reducing the dependence on the internal structure of the main body 91, making it convenient for the audio mechanism to be installed 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 can be rectangular, elliptical, or irregular. 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, the side facing the user's ear can be defined as the bottom wall 9111, the side facing away from the user's ear as the top wall 9112, the side facing the user's head as the inner wall 9121, and the side facing away from the user's head as 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 its length. The first retaining wall 915, the second retaining wall 916, and the first sidewall 911 and the second sidewall 912 of the main body 91 enclose the closed accommodating chamber 913, and the supporting bracket 93 is disposed in the accommodating chamber 913. In other words, the first retaining wall 915 and the second retaining wall 916 divide the installation chamber 412 into three chambers. The chamber between the first retaining wall 915 and the partition 415 is the installation chamber 412, which accommodates the electronic module 43. The chamber between the first retaining wall 915 and the second retaining wall 916 is the accommodating chamber 913. The chamber between the second retaining wall 916 and the rear end of the main body 91 is the rear chamber.

[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 closer to the user's head, relative to the housing. The rear cover 902 includes an inner sidewall 9121; the front shell 901 includes a top wall 9112, a bottom wall 9111, and an outer sidewall 9122. The side of the front shell 901 facing the rear cover 902 is an installation space with an open side. The rear cover 902 covers and seals the open side of the front shell 901 and, together with the front shell 901, the first retaining wall 915, and the second retaining wall 916, forms a receiving chamber 913. The front shell 901 and the rear cover 902 can be sealed together using methods such as 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 placed on the user's ear and can be divided into two sections. Specifically, the main body 91 includes a connecting section 903 and an arc section 904. The connecting section 903 is generally strip-shaped and located in front of the user's ear; the arc section 904 is located above the user's ear.

[0231] In this embodiment, if Figures 39 to 46 As shown, when the support bracket 93 and the sounding device 92 are located within the main body 91, the front cavity 9131 and the rear cavity 9132 are not interconnected. The front cavity 9131 and the rear cavity 9132 are respectively located on either side of the width of the main body 91 (i.e., from the outer wall 9122 to the inner wall 9121). 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 in phase with the first sound wave in the outside world and cancels it 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, 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 output 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 9133 is a roughly elongated structure, integrated at the junction of the end of the connecting section 903 and the beginning of the curved section 904. This sound outlet 9133 extends longitudinally along the length of the main body 91, spanning the transition area between the connecting section 903 and the curved section 904. This ensures sound transmission while optimizing wearing comfort and concealment. Of course, in other embodiments, the sound outlet 9133 can be located within the curved section 904, adjacent to the connecting section 903. When the user wears the audio mechanism 90, the sound outlet 9133 is positioned toward the ear canal, allowing the user to clearly hear the sound coming from the sound outlet 9133. The sound leakage hole 9134 is a roughly elongated structure and can be located within the connecting section 903, adjacent to the curved section 904. Both the sound outlet 9133 and the sound leakage hole 9134 are equipped with dust screens 914 to prevent dust from entering the accommodating cavity 913.

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

[0235] In this embodiment, if Figures 39 to 46 As shown, the sound device 92 can be a speaker; it is located in the connecting section 903 and adjacent to the curved section 904, shortening the distance between the sound device 92 and the user's ear and reducing sound loss. The sound device 92 can be mounted vertically within the main body 91, with the diaphragm within the sound device 92 positioned relative to the inner wall 9121 and outer wall 9122 of the main body 91. The sound-producing side of the sound device 92 faces the front cavity 9131, ensuring that sound from the sound device 92 is transmitted through the sound outlet 9133.

[0236] In this embodiment, if Figures 39 to 46 As shown, the supporting bracket 93 has a mounting area 931 and a connecting hole 932. The sound device 92 is mounted in the mounting area 931. The connecting hole 932 passes through the supporting bracket 93, so that the sound device 92 communicates with the front cavity 9131 through the connecting hole 932. In other words, the sound device 92 is located in the rear cavity 9132. The sound generated by the sound device 92 can be smoothly transmitted from the connecting hole 932 to the front cavity 9131, and then transmitted to the outside through the sound outlet hole 9133.

[0237] In this embodiment, if Figures 39 to 46 As shown, the side of the support bracket 93 facing the rear cavity 9132 is recessed to form a mounting area 931; at least a portion of the sound device 92 is mounted within the mounting area 931. The sound device 92 can be secured to the support bracket 93 by gluing to strengthen the connection between the sound device 92 and the support bracket 93. A communication hole 932 is located at the bottom of the mounting area 931, exposing the sound device 92 facing the front cavity 9131. This ensures that the sound of the sound device 92 is smoothly transmitted through the communication hole 932 to the front cavity 9131.

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

[0239] In this embodiment, if Figures 39 to 46 As shown, a ridge 95 is provided between the first side wall 911 and the second side wall 912 of the main body 91, and the supporting bracket 93 can be bonded to the ridge 95. The ridge 95 can support the supporting bracket 93, and also help to further fix the position of the supporting bracket 93, thereby improving the overall stability of the audio mechanism 90. When the supporting bracket 93 is installed in place, the ridge 95 can support and limit the supporting bracket 93, preventing the supporting bracket 93 from shaking in the main body 91, thereby 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 ridges 95 that are continuously or spaced apart along the supporting bracket 93, and the supporting bracket 93 can abut against the ridge 95 and be bonded to the ridge 95.

[0240] In this embodiment, if Figures 39 to 46 As shown, the audio mechanism 90 also includes a snap-fit ​​structure 94 to secure the bonding of the support bracket 93 to the main body 91. When the support bracket 93 is assembled into the main body 91, the support bracket 93 is fixed to the main body 91 via the snap-fit ​​structure 94 and then glued. This not only simplifies the assembly process of the support bracket 93, but also greatly improves the stability and durability of the overall structure. It also prevents loose components caused by long-term use or external environmental factors, ensuring continuous, stable and reliable audio output. The number of snap-fit ​​structures 94 can be 1, 2, 3, 4, or more; multiple sets of snap-fit ​​structures 94 are arranged at intervals along the circumference of the support bracket 93.

[0241] In this embodiment, if Figures 39 to 46 As shown, the latching structure 94 includes a locking tongue 941 and a locking portion 942. The locking tongue 941 is mounted on one of the main body 91 and the supporting bracket 93. The locking portion 942 is provided on the other of the two. The locking tongue 941 cooperates with the locking portion 942 to securely attach the supporting bracket 93 to the main body 91. The locking tongue 941 and the locking portion 942 cooperate to securely connect the supporting bracket 93 to the main body 91. A mounting gap is formed between the locking portion 942 and the ledge 95. After the locking tongue 941 passes over the locking portion 942, it is located within the mounting gap and abuts against the side of the locking portion 942 facing the ledge 95.

[0242] In order to facilitate the locking tongue 941 to pass over the locking portion 942; referring to one embodiment, as Figures 29 to 36 As shown, the locking tongue 941 is mounted to the main body 91 or the supporting bracket 93 via an elastic arm 943, so that the locking tongue 941 can be elastically deformed to facilitate passing over the locking portion 942. The elastic deformation of the locking tongue 941 allows it to easily pass over the locking portion 942 during installation. After installation, the locking tongue 941 returns to its original shape and tightly fits with the locking portion 942 to prevent the supporting bracket 93 from loosening. The elastic arm 943 can be a component that is inherently elastic or a component that can deform under load.

[0243] In this embodiment, if Figures 39 to 46 As shown, the locking tongue 941 is mounted to the supporting bracket 93 via an elastic arm 943; the locking portion 942 protrudes from the inner wall of the main body 91. The locking portion 942 is integrally provided on the inner wall of the main body 91 to enhance the structural strength between the locking portion 942 and the main body 91 and to reduce the difficulty in manufacturing the locking portion 942 and the main body 91. The locking tongue 941 is integrally provided on the supporting bracket 93 to enhance the structural strength between the locking tongue 941 and the supporting bracket 93 and to reduce the difficulty in manufacturing the locking tongue 941 and the supporting bracket 93.

[0244] In this embodiment, if Figures 39 to 46 As shown, one of the main body 91 and the supporting bracket 93 has a positioning groove 96, and the other has a positioning protrusion 97 that cooperates with the positioning groove 96. The cooperation between the positioning groove 96 and the positioning protrusion 97 can ensure that the supporting bracket 93 is accurately installed in the main body 91, avoid deviation during the installation process, and ensure the stable performance of the audio mechanism 90.

[0245] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection 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 "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0247] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0248] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. An optical machine module, characterized in that: include: A display device, the display device being used to emit a light beam; a beam steering element, the beam steering element being located on a light-emitting side of the display device, wherein a beam emitted by the display device and propagating in a first direction is deflected by the beam steering element and then propagates in a second direction, the first direction and the second direction being arranged at an angle; A beam shaping lens group, which is used to shape the light beam. The beam shaping lens group consists of 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. The focal length f2 of the second lens and the total focal length fn of the optical machine module satisfy the following relationship: 3.5≤f2 / fn≤4.

9. The first lens, the second lens and the third lens are all trimmed lenses, and the aperture D of the trimmed lens and the total focal length fn of the optical machine module satisfy the following relationship: 0<D / fn≤0.

53. The first lens has negative optical power, the second lens has positive optical power, and the third lens has positive optical power.

2. The optical machine module according to claim 1, wherein: The light beam steering element includes a reflective surface, and an angle between the reflective surface and the display device is an acute angle.

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

4. The optical machine module according to claim 3, wherein: The prism and the second lens are integrally formed or glued together; or, The prism and the second lens are spaced apart.

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

6. The optical machine 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 light beam steering element, and the second sub-lens is located between the light beam steering element and the third lens.

7. The optical machine module according to claim 1, wherein: The refractive indexes 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 optical engine module meets at least one of the following conditions: The focal length f1 of the first lens and the total focal length fn of the optical machine module satisfy the following: -7.8≤f1 / fn≤2.8; The focal length f3 of the third lens and the total focal length fn of the optical machine module satisfy the following: 1.5≤f3 / fn≤2.

5.

9. A near-eye display device, characterized in that: include: The optical machine module according to any one of claims 1 to 8; An optical waveguide display module includes a waveguide and an in-coupling element and an out-coupling element arranged on the waveguide. The light beam emitted by the optical machine module is introduced into the waveguide through the in-coupling element, and after total reflection transmission in the waveguide, it is emitted by the out-coupling element to the human eye.

10. The near-eye display device according to claim 9, wherein: The coupling-in element and the coupling-out element are both volume holographic gratings, and / or the coupling-in element and the coupling-out element have the same period.

11. The near-eye display device according to claim 9, wherein: The coupling-in element and the coupling-out element are both angle multiplexing gratings, and 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, and the plurality of coupling-in grating regions correspond to the plurality of coupling-out grating regions one by one.

12. The near-eye display device according to claim 9, wherein: The coupling-in element is a coupling-in grating, the coupling-out element is a coupling-out grating, the coupling-in grating is arranged on a side surface of the waveguide, the waveguide has an inclined surface, the inclined surface is arranged at an acute angle or an obtuse angle with the side surface of the waveguide, and the coupling-out grating is arranged on the inclined surface.

13. The near-eye display device according to claim 12, wherein: The optical waveguide display module further includes a compensation mirror, which is bonded to the inclined surface of the waveguide. The outcoupling grating is sandwiched between the inclined surface of the waveguide and the compensation mirror.

14. A pair of smart glasses, characterized in that: include: A spectacles frame and a near-eye display device according to any one of claims 9 to 13, wherein the spectacles frame comprises 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 also includes an optical machine housing and an optical bracket. The optical machine housing is arranged in the lens frame and is used to fix the optical machine module of the near-eye display device. The optical machine housing is installed on the waveguide through the optical bracket.

15. A smart swimming goggles, characterized in that: include: Frames; The near-eye display device according to any one of claims 9 to 13, wherein the optical machine module and the optical waveguide display module of the near-eye display device are both arranged in the frame, and the coupling element of the optical waveguide display module is the surface of the waveguide, and the surface is a plane or a curved surface.

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