Dual-purpose multifunctional glasses for real projection and near-to-eye display

Abstract

The invention discloses a pair of dual-purpose multifunctional glasses for real projection and near-to-eye display, which relates to the field of photoelectric display and comprises a display light engine module, a glasses leg optical module, an optical combiner module, an external projection module and a detection module. A double-channel light path structure is adopted, after light output by the display light engine is shunted by the glasses leg optical module, one path of light is coupled into human eyes through the optical combiner to form a virtual image, and near-to-eye display is achieved; and the other path is projected to an external real surface to form a real image, thereby realizing external projection. The system can realize dual-mode independent / superposed display through optical path switching or polarization multiplexing, and is equipped with a detection module for sampling projected image parameters in real time and feeding back to control the adjustment of an optical assembly so as to optimize the image quality. Through optical path multiplexing and structural lightweight design, the limitation that a traditional AR device is single in function is broken through, virtual-real fusion display and two-way information interaction are achieved in the same wearable device, and the function flexibility, interaction immersion and environmental adaptability of the device are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the fields of display technology and micro / nano structures, and specifically relates to a multifunctional pair of glasses that can be used for both real-world projection and near-eye display. Background Technology

[0002] Near-eye display (NAV) is a display technology that uses a display device placed near the eyes and connected to the head to render light field information onto the eyes, thereby reconstructing the scene image within the eye. It projects images or information onto the user's eyes through head-mounted displays, smart glasses, contact lenses, and other wearable devices. Depending on whether it blends with the real-world scene, it can be divided into immersive virtual reality (VR) or interactive augmented reality (AR) displays. This technology allows users to see virtual objects or overlay information from the real world in front of them, greatly expanding the user's perceptual interface.

[0003] Pico projection is a miniaturized projection technology that projects images or videos onto a screen or other surface using a high-brightness LED or laser light source and a micro-projection lens for magnification. Traditional micro-projection primarily relies on LEDs or lasers as the light source, utilizing technologies such as DLP, LCoS, and LBS to achieve projection display. Because the light source and image source are generated by different devices, the structure has significant limitations, preventing true miniaturization. However, using self-emissive display chips such as Micro-LED and Micro-OLED to replace the light source and image source greatly simplifies the structure, providing a better approach to projection miniaturization.

[0004] For head-mounted near-eye display devices, whether it is helmet-style VR or glasses-style AR, there are still some shortcomings in terms of interaction with the environment. In addition, due to limitations such as the angle of waveguide coupling in optical combiners, the field of view of AR glasses still cannot meet the human eye's immersive viewing experience. When traditional micro-projection is applied to near-eye display devices, there are also limitations such as large size and insufficient structural flexibility. Summary of the Invention

[0005] To address some of the technical problems of existing technologies, this invention discloses a multifunctional pair of glasses that can be used for both real-world projection and near-eye display. It aims to solve the problems of limited functionality and interaction of existing AR glasses and near-eye display devices, and breaks through the limitation of traditional devices that can only allow the wearer to view virtual images. It enables the same optical system to project real images to the outside and to realize virtual displays to the inside, thereby achieving two-way information presentation and interaction.

[0006] To achieve the above objectives, the present invention provides a multifunctional pair of glasses that can be used for both real-world projection and near-eye display. The glasses are characterized by comprising a display light engine module, a temple optical module, an optical combiner module, an external projection module, and a detection module. The display light engine module provides an image source, including an active microdisplay chip or a laser scanning module and its driving and power supply components. The temple optical module receives the light output from the display light engine module and performs optical path transmission and splitting. The optical combiner module is connected to the temple optical module and couples a portion of the light into the human eye to form a virtual image, achieving near-eye display. The external projection module is connected to the temple optical module and projects another portion of the light onto an external real-world surface to form a real image. The detection module detects the size, position, and image quality of the externally projected image and feeds this information back to the control unit to adjust the optical module parameters for image quality optimization.

[0007] The temple optical module includes an optical projection component and a near-eye optical component. The optical projection component is used for focusing and correcting the external projection optical path, while the near-eye optical component is used for imaging control of the near-eye display optical path. The optical component includes at least one spherical lens, aspherical lens, or Fresnel lens, or uses diffraction devices such as metasurfaces, gratings, and holographic elements. The external projection optical path adopts an image-side telecentric design, and the near-eye display optical path can directly enter the eye or form a retinal projection through an optical combiner.

[0008] The optical combiner module is used to mix virtual light with ambient light and includes optical waveguides, freeform surfaces or semi-transparent and semi-reflective devices. Its coupling element adopts reflective or transmissive micro-nano elements, specifically including metasurfaces, diffraction gratings, geometric micromirrors, holographic elements or polarizing holographic elements.

[0009] The detection module is installed in the frame or temple and has the functions of field coverage and depth recognition. By sampling the sharpness, brightness and distortion of the projected image in real time, it feeds back to the control unit to adjust the spacing of optical components, refractive index or optical axis offset, so as to achieve automatic focusing and image quality optimization. The optical path switching between the external projection module and the temple optical module is achieved by optical path channel switching, beam selective propagation or polarization multiplexing element.

[0010] In one specific embodiment, the glasses can realize two working modes: in the common display mode, the external projection module and the optical combiner module work simultaneously to project real images and coupled virtual images respectively; in the separate display mode, only the external projection module works or only the optical combiner module works; the images in the two modes can be the same or different, supporting independent control and superimposed display of binocular and bilateral projections.

[0011] In one specific implementation, a single image source or a multi-image source scheme is adopted; in the multi-image source scheme, the external projection and near-eye display image sources are set independently, and the optical channels can be partially shared or completely separated; in the single image source scheme, the image source is shared through time-division multiplexing, polarization multiplexing or optical path switching, and the optical components are partially shared.

[0012] In one specific implementation, in the single image source scheme, the switching between different images of external projection and near-eye display is achieved through fast time-division multiplexing; in the common display mode, the same content is displayed in both modes when the image source outputs a single image, and different content is displayed when time multiplexing is used; the image output can be the same or different during the mode switching process.

[0013] In one specific embodiment, under a single image source structure, optical path switching is achieved through at least one of the following methods: mechanical switching, using a stepper motor to drive a gear rack structure to rotate, translate, or perform combined motions of the display module, optical module, or optical combiner module to change the optical path; optical beam splitting, using semi-transparent and semi-reflective elements, prisms, or diffractive optical elements to split the light beam into a near-eye display optical path and an external projection optical path; and electronic control, using adjustable light elements such as liquid crystal light valves to change the transparency or reflectivity to control the light transmission path.

[0014] In one specific embodiment, mode-selective opening and closing is achieved through a light-shielding baffle or polarization / diffraction multiplexing; the light-shielding baffle is driven by a motor to move along a guide rail, which can precisely block the near-eye display light path or the external projection light path, and is equipped with a position sensor to achieve closed-loop control; the polarization / diffraction multiplexing outputs light with a specific polarization direction through the display module, which matches the polarization / diffraction characteristics of the coupling beam splitter to achieve selective conduction of the optical path channel.

[0015] In one specific embodiment, the optical structure design includes a common optical component optimization step. First, the lens aperture, focal length, thickness and material of the near-eye optical component are optimized to match the optical combiner. Then, an external projection module is designed based on the common component parameters so that the focal length and aperture of the projection optical path meet the imaging requirements. The real image plane is optimized by adjusting the lens group spacing, which reduces distortion and increases the RMS radius.

[0016] In one specific embodiment, the optical module includes a spherical lens, an aspherical lens, a Fresnel lens, a metasurface, or a diffraction grating. The projection supplement module achieves image quality correction at different distances and tilt angles through mechanical focusing (motor-driven lens spacing) or electronic focusing (liquid crystal zoom lens / liquid lens). Combined with multi-layer coating and telecentric design, it ensures high transmittance and low dispersion.

[0017] In one specific embodiment, the optical combiner includes a beam splitter, a semi-transparent and semi-reflective film, a waveguide, or a freeform surface for mixing ambient light and virtual light rays; the position of the combiner does not affect the ambient light imaging when the optical path is switched, and the combiner, optical module, and display module all receive feedback and adjustment from the detection module to adapt to different refractive powers and eye positions.

[0018] In one specific embodiment, the detection module performs the following operations: environmental identification to determine the optimal projection position, and acquiring the projected image for edge localization and image quality analysis; data processing is achieved through a microprocessor chip on the temple or wireless transmission to an external device; image correction is achieved by adjusting the spacing of optical components, optical axis, or output parameters of the display module to optimize the sharpness and correct distortion of the projected image.

[0019] Beneficial Effects: 1) This invention achieves dual-purpose display functions of near-eye display and external projection, balancing virtual-real fusion and interactivity while maintaining lightweight design and high transmittance; through shared optical paths and mode switching design, the device is more compact in structure and more flexible in function; multi-mode display is achieved by using polarization multiplexing and mechanical switching, allowing for rapid switching of display modes between different scenarios; combined with detection and feedback control, automatic focusing, image quality optimization, and adaptive display are achieved; compared with expensive process solutions such as metasurface waveguides, this invention is easier to mass-produce, has lower manufacturing costs, and higher compatibility; in summary, this invention not only has significant advantages in functional integration, but also achieves significant improvements in user experience, interactive immersion, and system practicality. 2) Dual-module collaborative operation improves display performance: The direct-view display module and the projection display module can operate independently or collaboratively, achieving resolution improvement through pixel staggered distribution, expanding the field of view, and simultaneously improving field of view uniformity, solving the problem of difficulty in balancing resolution and field of view in traditional single-display modes. 3) Enhanced Functional Compatibility through Metasurface Integration: The optical path modulation structure utilizes micro / nano optical metasurfaces (two-dimensional / three-dimensional gratings or cylindrical particle types), integrating compensation optical devices (Fresnel optical surfaces, superlenses, etc.). This allows for simultaneous refractive correction (myopia / hyperopia / astigmatism) and ambient light control, resulting in high transmittance in natural light bands and minimal fluctuations in optical performance under different temperature conditions. 4) Optimized Battery Life and Adaptability through Dynamic Power Control: AI algorithms dynamically allocate power to both modules. In high-resolution mode, both modules operate at full power, while in low-power mode, turning off the projection module extends battery life. This supports outdoor use in strong light, improves pixel compensation accuracy, and addresses the high energy consumption and poor environmental adaptability issues of traditional near-eye display devices. 5) Lightweight Structure and Wearing Comfort: The optical components employ a micro / nano integrated design. The direct-viewing module and optical structure are co-encapsulated within a transparent glass / resin block, and the projection module is integrated into the frame. This reduces the overall weight by 30% compared to traditional solutions, addressing the technical pain points of bulky and uncomfortable near-eye display devices. 6) Users can adjust the pixel density according to their usage scenario. For example, when the environmental information is complex and the user needs to receive a lot of environmental information, the transparent display module can operate alone. When the environmental information is simple and the user does not need to pay close attention, the user can use a high-pixel display. Users can adjust the two modules to improve the field of view. Users can switch between the two display modules to image at different positions of the human eye according to their own usage scenario and habits. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the multi-display module structure according to Embodiment 2 of the present invention;

[0022] Figure 3This is a schematic diagram of the mechanical structure implementing dual channels in Embodiment 3 of the present invention. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the dual-channel structure implemented in Embodiment 3 of the present invention. Figure 2 ;

[0024] Figure 5 This is a schematic diagram of the dual-channel structure implemented in Embodiment 3 of the present invention. Figure 3 ;

[0025] Figure 6 This is a schematic diagram of the mechanical deflection applied to an optical waveguide structure in Embodiment 4 of the present invention. Figure 1 ;

[0026] Figure 7 This is a schematic diagram of polarization multiplexing applied to an optical waveguide structure in Embodiment 4 of the present invention. Figure 2 ;

[0027] Figure 8 This is a schematic diagram of the process of an embodiment of the present invention.

[0028] Explanation of the reference numerals in the attached figures:

[0029] 101: External Reality Projection; 1011: Right-handed External Reality Projection; 102: Ambient Light; 103: Detection Module; 1031: Detection Ray; 104: Optical Combiner Module; 1041: Total Reflection Layer; 1042: Total Reflection Prism; 1043: Semi-transparent and Semi-reflective Film; 1044: Wedge-shaped Waveguide; 1045: Optical Output Element; 1046: Optical Waveguide; 1047: Polarization Multiplexing Coupler; 1048: Polarization Multiplexing Coupler; 105: Near-Eye Display Ray; 1051: Left-handed Near-Eye Display Ray.

[0030] 106: Compensation optical module; 107: Optical module; 1071: Near-eye optical module; 1072: Projection optical module; 108: Display light engine module; 1081: First microdisplay chip; 1082: First microdisplay driver; 1083: Second microdisplay chip; 1084: Second microdisplay driver; 109: Touch module; 110: Voice control module; 111: Power supply and control circuit; 201: Lens; 202: Light shield; 203: Mechanical moving gear; 204: Rotatable light display module; 301: Schematic diagram of projection light path after rotation; 302: Schematic diagram of flexible rotation based on optical fiber; 303: Schematic diagram of mixed polarization output. Detailed Implementation

[0031] The embodiments of this patent are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and should not be construed as limiting this patent.

[0032] Example 1

[0033] In a first embodiment of the present invention, a multifunctional pair of glasses for both real-world projection and near-eye display is provided, comprising a display light engine module, a temple optical module, an optical combiner module, an external projection module, and a detection module. The display light engine module provides an image source, including an active microdisplay chip or a laser scanning module and its driving and power supply components. The temple optical module receives the light output from the display light engine module and performs optical path transmission and splitting. The optical combiner module is connected to the temple optical module and couples a portion of the light into the human eye to form a virtual image, achieving near-eye display. The external projection module is connected to the temple optical module and projects another portion of the light onto an external real-world surface to form a real image. The detection module detects the size, position, and image quality of the externally projected image and feeds this information back to the control unit to adjust the optical module parameters to optimize image quality.

[0034] The temple optical module includes an optical projection component and a near-eye optical component. The optical projection component is used for focusing and correcting the external projection optical path, while the near-eye optical component is used for imaging control of the near-eye display optical path. The optical component includes at least one spherical lens, aspherical lens, or Fresnel lens, or uses diffraction devices such as metasurfaces, gratings, and holographic elements. The external projection optical path adopts an image-side telecentric design, and the near-eye display optical path can directly enter the eye or form a retinal projection through an optical combiner.

[0035] The optical combiner module is used to mix virtual light with ambient light and includes optical waveguides, freeform surfaces or semi-transparent and semi-reflective devices. Its coupling element adopts reflective or transmissive micro-nano elements, specifically including metasurfaces, diffraction gratings, geometric micromirrors, holographic elements or polarizing holographic elements.

[0036] The detection module is installed in the frame or temple and has the functions of field coverage and depth recognition. By sampling the sharpness, brightness and distortion of the projected image in real time, it feeds back to the control unit to adjust the spacing of optical components, refractive index or optical axis offset, so as to achieve automatic focusing and image quality optimization. The optical path switching between the external projection module and the temple optical module is achieved by optical path channel switching, beam selective propagation or polarization multiplexing element.

[0037] In the glasses provided in this embodiment, two working modes can be realized: in the common display mode, the external projection module and the optical combiner module work simultaneously, projecting real images and coupled virtual images respectively; in the separate display mode, only the external projection module works or only the optical combiner module works; the images in the two modes can be the same or different, supporting independent control and superimposed display of binocular and bilateral projections.

[0038] In the glasses provided in this embodiment, a single image source or a multi-image source scheme is adopted; in the multi-image source scheme, the external projection and near-eye display image sources are set independently, and the optical channels can be partially shared or completely separated; in the single image source scheme, the image source is shared through time-division multiplexing, polarization multiplexing or optical path switching, and the optical components are partially shared.

[0039] In the single image source scheme of this embodiment, the switching between external projection and near-eye display is achieved through fast time-division multiplexing; in the common display mode, the same content is displayed in both modes when the image source outputs a single image, and different content is displayed when time multiplexing is used; the image output can be the same or different during the mode switching process.

[0040] In the single image source structure of this embodiment, optical path switching is achieved through at least one of the following methods: mechanical switching, using a stepper motor to drive a gear rack structure to make the display module, optical module, or optical combiner module rotate, translate, or perform compound movements to change the optical path; optical beam splitting, using semi-transparent and semi-reflective elements, prisms, or diffractive optical elements to split the light beam into a near-eye display optical path and an external projection optical path; and electronic control, using adjustable light elements such as liquid crystal light valves to change the transparency or reflectivity to control the light transmission path.

[0041] In this embodiment, mode-selective opening and closing is achieved through a light-shielding baffle or polarization / diffraction multiplexing; the light-shielding baffle is driven by a motor to move along a guide rail, which can precisely block the near-eye display light path or the external projection light path, and is equipped with a position sensor to achieve closed-loop control; the polarization / diffraction multiplexing outputs light with a specific polarization direction through the display module, which matches the polarization / diffraction characteristics of the coupling beam splitter to achieve selective conduction of the optical path channel.

[0042] In this embodiment, the optical structure design includes a common optical component optimization step. First, the lens aperture, focal length, thickness and material of the near-eye optical component are optimized to match the optical combiner. Then, an external projection module is designed based on the common component parameters to ensure that the focal length and aperture of the projection optical path meet the imaging requirements. The real image plane is optimized by adjusting the lens group spacing to reduce distortion and increase the RMS radius.

[0043] In this embodiment, the optical module includes spherical lenses, aspherical lenses, Fresnel lenses, metasurfaces or diffraction gratings. The projection supplement module achieves image quality correction at different distances and tilt angles through mechanical focusing (motor-driven lens spacing) or electronic focusing (liquid crystal zoom lens / liquid lens). Combined with multi-layer coating and telecentric design, it ensures high transmittance and low dispersion.

[0044] In this embodiment, the optical combiner includes a beam splitter, a semi-transparent and semi-reflective film, a waveguide, or a freeform surface for mixing ambient light and virtual light. When the optical path is switched, the position of the combiner does not affect the ambient light imaging, and the combiner, optical module, and display module all receive feedback and adjustment from the detection module to adapt to different refractive powers and eye positions.

[0045] In this embodiment, the detection module performs the following operations: environmental identification to determine the optimal projection position, and acquiring the projection image for edge localization and image quality analysis; data processing is achieved through the microprocessor chip on the temple or wireless transmission to an external device; image correction is achieved by adjusting the spacing of the optical components, the optical axis, or the output parameters of the display module to optimize the sharpness and correct the distortion of the projection image.

[0046] It is worth mentioning that existing technologies, such as AR systems based on waveguides or metasurface waveguides, can only couple virtual light fields into the human eye; there is currently no dual-function optical path solution to achieve projection of external real-world scenes. This invention… Figures 2-7 An innovative dual-channel optical path structure was proposed. The image light output from the display light engine is split into two paths after passing through the optical module of the temple. One path enters the eye through an optical combiner to form a virtual image, while the other path is reflected back and projected onto an external real surface to form a real image. This achieves a composite optical path that serves both "near-eye display" and "external projection." This structure is not yet publicly available in existing technologies and has significant innovative features. Its highlight is that the same micro-display light source can handle both AR virtual images and real-world projections, with shared optical paths, thus enabling multi-mode display in lightweight wearable devices. The research and development idea stems from breaking through the limitation that AR glasses are only visible to the user. Through optical multiplexing and structural reflection design, the display light can serve both the wearer's personal near-eye viewing and information display and interaction with the outside world, thereby constructing a more open and immersive multi-functional wearable display system.

[0047] This embodiment employs a three-segment optical path structure consisting of a display light engine module, a temple projection module, and an external projection module. It can simultaneously or independently achieve external reality projection and internal near-eye imaging, making it a dual-function, dual-channel system. It does not rely on complex metasurface manufacturing processes, offering better integration and cost advantages. Furthermore, this invention not only achieves a composite optical path for near-eye and external display but also incorporates a detection and data correction module, which can automatically identify the projection surface and perform real-time image quality correction. Overall, this invention offers a more flexible structure and richer functionality, enabling immersive displays in AR environments and projecting images onto real-world surfaces, significantly improving interactive performance and user experience.

[0048] This embodiment achieves high transmittance and low dispersion through multi-layer coating design and material selection of the optical module. The front-end lens uses low Abbe number optical glass or aspherical composite lens to reduce chromatic aberration and increase light throughput. The combination of the projection module and the front-end optical components adopts a telecentric design to maintain imaging transmittance and consistency. For focusing at different distances and backgrounds, this invention incorporates a motor-driven micro-displacement structure in the optical module to achieve mechanical focusing by changing the lens spacing. Alternatively, liquid crystal zoom lenses or liquid lenses can be used for electronic focusing. In addition, polarization focusing technology is used to control the polarization direction and refractive index distribution to achieve light focusing and image stabilization at different angles. The system's detection module can sample the projected image in real time, analyze its sharpness, brightness, and distortion, and feed the results back to the control unit. This allows for automatic image quality optimization and focusing by adjusting the optical component spacing, refractive index, or optical axis offset, ensuring high-quality imaging even against complex backgrounds and at different tilt angles.

[0049] This embodiment allows for free switching or overlay display in two modes, and achieves selective optical propagation through polarization multiplexing, beam splitting, and mechanical movement. It also incorporates a new closed-loop control system of detection-feedback-correction, enabling both display and projection light to be automatically optimized based on the external environment and imaging status. This structure not only expands the application range of existing systems but also significantly improves optical flexibility and ease of use.

[0050] The following provides further supplementary explanations of this embodiment.

[0051] Overall structure

[0052] like Figure 1As shown, this invention provides a multifunctional glasses structure that can be used for both real-world projection and near-eye display. This structure includes, but is not limited to, a glasses-like structure. The hardware structure, from temple to front, comprises: a power supply and control circuit 111 (which can use an STM32H743 microcontroller + FPGA architecture), a voice control module 110 (which can use an offline voice recognition module with a wake-up word response time <0.5s), a touch module 109 (capacitive touch sensor, 120Hz sampling rate), a display light engine module 108, an optical module 107 (aspherical compound lens group, 15mm focal length), and a compensation optical module 106 (liquid zoom lens, focusing range 0.3- The optical module consists of a 5m optical array, a light combiner module 104 (diffractive waveguide, 35° field of view), and a detection module 103 (640×480 TOF depth camera). The image is driven and powered by the power supply and control circuit 111. The output image or video is coupled into the light combiner 104 through the optical module 107. The light combiner module and the optical module can be combined using birdbath, freeform surface, folding prism, etc. The light ray 105 carrying virtual information enters the human eye along with the ambient light 102 to achieve near-eye display. At the same time, the image output by the optical module passes through the second optical path sequentially through the optical module 107 and the compensation optical module 106, and is projected onto the real external environment. The design of the two sets of optical components conforms to the superimposed lens theory. The focal length calculation formula is , where are the focal lengths of the three lenses respectively, and d is the lens spacing. The design of the external reality projection compensation module needs to match the focal length (8-25mm) and aperture (Φ5-12mm) of the front-end optical components to ensure that the RMS radius of the projection optical path is <1μm and the distortion rate is <5%. The system samples the projected image parameters in real time (30fps) through the detection module 103 and feeds them back to the control unit to adjust the optical component spacing (accuracy ±0.01mm), refractive index or optical axis offset to achieve automatic focusing and image quality optimization. Users can switch display modes (response time <100ms), zoom the image (supports 2-10x digital zoom) and switch video sources through the voice control module 110 and the touch module 109.

[0053] The following are some embodiments of a multifunctional glasses structure that can be used for both real-world projection and near-eye display. These include, but are not limited to, methods such as multiple display light sources, mechanical movement and deflection, and reuse of micro-nano components to achieve dual-optical-path display effects. The optical modules and optical combiner modules involved include, but are not limited to, the structures given in the embodiments.

[0054] Example 2

[0055] like Figure 2As shown, this invention provides a multifunctional glasses structure that can be used for both real-world projection and near-eye display. This structure comprises three main parts: a display light engine module, an optical module, and a light combiner module or external projection compensation module, from the display image source to the external reality or human eye. The display light engine module adopts a dual Micro-LED chip solution, and the driving circuit supports a MIPI interface (transmission rate 4Gbps). The output image or video is coupled into the light combiner or external projection compensation module through the optical module to achieve a dual-display effect. Specifically, the first micro-display chip 1081 (near-eye display channel) and the second micro-display chip 1083 (external projection channel) output images respectively, independently controlled by the first micro-display driver 1082 and the second micro-display driver 1084 (refresh rate 60Hz). Power and control are provided by the power supply and control circuit 111. The dual-channel images pass through the near-eye optical module 1071 (Fresnel lens, focal length 8mm, transmittance >92%) and the projection optical module 1072 (aspherical lens). The lens assembly (F-number 2.4) projects external reality projection light onto the external surface via projection compensation optical module 106 (liquid lens, focusing range 0.5-3m). Near-eye display light is projected through a light combiner (total reflection layer 1041 uses Ag reflective film, reflectivity >95%; semi-reflective film 1043 has 50% transmittance / 50% reflectivity) to achieve virtual image imaging. Ambient light 102 enters the eye through lens 201 (resin material, refractive index 1.56) and semi-reflective film 1043. Detection module 103 (field of view 60°×45°) samples the projected image via detection ray 1031, providing feedback control to adjust the lens spacing (adjustment accuracy ±0.02mm) and optical axis offset (±1°) of projection optical module 1072, thereby optimizing image quality.

[0056] The display light engine module in this embodiment supports multiple technology paths: active microdisplay chips include Micro-LED (peak brightness 1500 nits), Micro-OLED (contrast ratio 10000:1), Nano-LED (wavelength 520nm±5nm), and PeLED (lifespan > 50000 hours); the laser scanning structure adopts LBS (laser wavelength 450nm / 520nm / 635nm, power 5mW); the driving circuit integrates temperature compensation (operating temperature -10℃~50℃) and Gamma correction (γ=2.2). Multiple image source configurations support independent / synchronous display: the dual-chip solution can output images of different resolutions (1920×1080 for near-eye display, 1280×720 for external projection), while the single-chip solution achieves dual-mode display through time-division multiplexing (switching frequency 120Hz). The mode switching mechanisms include: 1) mechanical switching (stepper motor drives the light-shielding plate, switching time <200ms); 2) polarization multiplexing (P-polarized near-eye display, S-polarized external projection); 3) electronic switching (LCD light valve, response time <10ms). In the common display mode, image overlay is supported (transparency adjustable from 0-100%). A single image source achieves different content displays through fast time-division multiplexing (frame synchronization accuracy ±1μs), and the time multiplexing period is configurable (default 16.7ms).

[0057] The optical modules 1071, 1072, and compensation optical module 106 in this embodiment are composed of multiple optical elements: the near-eye optical module 1071 uses an H-K9L glass aspherical lens (8mm diameter, 2.5mm center thickness, Abbe number 64.1) with an anti-reflection coating (reflectivity <0.5% in the 400-700nm band); the projection optical module 1072 includes a cemented doublet lens (crown glass H-ZK7 + flint glass H-F2, focal length 12mm) with a dispersion coefficient <20; the compensation optical module 106 uses a PDMS liquid lens (aperture Φ6mm, focusing range 0.3-5m, response time <100ms). The lens material can be glass (transmittance >92%) or PMMA plastic (density 1.19g / cm³). 3 The active optical zoom structure uses a stepper motor (model 28BYJ-48) to drive a gear rack to adjust the lens spacing (accuracy ±0.01mm), and works with a polarization focusing element (liquid crystal polarization grating, period 500nm) to achieve image quality stability at tilt angles of ±30°.

[0058] The optical combiner structure 1041 and 1043 in this embodiment is used for mixing ambient light and virtual light: the total reflection layer 1041 is made of Ag nanofilm (thickness 50nm, reflectivity >95%@450-650nm), and the semi-transparent and semi-reflective film 1043 is a TiO2 / SiO2 multilayer film (transmittance 50%±3%, reflectivity 50%±3%); the waveguide substrate is made of BK7 glass (thickness 1.2mm, refractive index 1.5168), and the freeform prism adopts a ZEMAX optimized design (curvature radius 50mm). When switching optical paths, the combiner module is driven to rotate by a micro servo motor (rotation accuracy ±0.5°) to ensure that the change in ambient light transmittance is <5% and the fluctuation of the near-eye display field of view is <2°. The optical module and the combiner work together to support diopter adjustment (-5D to +3D) and achieve pupil distance adaptation (54-74mm) by moving the lens group.

[0059] The detection module in this embodiment acquires and uploads the real-world projected image to the data processing center: image recognition and localization employ the Canny edge detection algorithm (edge ​​extraction accuracy ±1 pixel) and SIFT feature point matching (matching time <20ms); data upload is via Bluetooth 5.0 (transmission rate 2Mbps) or Wi-Fi 6 (latency <10ms) to the terminal device; data processing is performed by the temple microprocessor chip (STM32H743, 480MHz), running the Laplacian sharpness evaluation function (gradient threshold >80) and distortion correction algorithm (polynomial fitting order 3). Image correction commands are transmitted via I... 2 The C-bus transmits data to the mechanical control system. The optical component spacing is adjusted to a resolution of 0.001 mm, the optical axis offset control accuracy is ±0.1°, and the display module output adjustment supports gamma correction (γ = 2.2) and dynamic contrast enhancement (range 100:1 to 10000:1).

[0060] The working process of the optical structure is as follows: Figure 8 As shown, the specific working status is as follows:

[0061] When the optical device is activated (start-up time <2s), the microdisplay chips 1081 and 1083 generate a microdisplay image (brightness uniformity >90%). The output dual-channel image or video passes through the near-eye optical module 1071 (luminous flux loss <8%) and the projection optical module 1072 (MTF@30lp / mm>0.7), respectively. The actual projection light is projected onto the external object through the lens 201 (resin material CR-39, light transmittance 92%) and the compensation optical module 106 (focusing accuracy ±0.5mm) (imaging distortion <1%). The near-eye AR light is reflected twice by the total reflection layer 1041 (reflection efficiency >95%) and the semi-reflective film 1043 (polarization extinction ratio >1000:1) before entering the eye (eye box size 10×8mm). The detection module 103 samples at a frame rate of 30fps with a feedback control delay of <50ms, enabling adjustment of the projected image size (adjustable from 10 to 50 inches), position (positioning accuracy ±2mm), and image quality (40% improvement in clarity).

[0062] Example 3

[0063] like Figure 3 , Figure 4 , Figure 5 As shown, this invention provides a multifunctional glasses structure that can be used for both real-world projection and near-eye display. This structure consists of a single image source, and channel switching or mode selection is achieved through mechanically controlled movement and rotation. The system from the display image source to the external reality or human eye comprises three main parts: a display light engine module, an optical module, and a light combiner module or external projection compensation module. The display light engine module consists of a microdisplay chip capable of generating microdisplay images, a microdisplay light source such as LBS, and its driving and power supply components. The output image or video is coupled through the optical module into the light combiner or external projection compensation module to achieve a dual-display effect.

[0064] like Figure 3As shown, the image output by the display light engine module 108 (0.3-inch LCOS chip, 1920×1080 resolution) serves as the object plane, and the power supply and control circuit 111 (lithium battery voltage 3.7V, operating current 150mA) provides the drive. The image is coupled into the lens 201 (thickness 2mm, refractive index 1.56) via the temple optical module 107 (aspherical lens group, focal length 15mm). A movable total reflection layer 1041 (size 5×8mm, driven by magnetostriction, displacement range 0-10mm, positioning accuracy ±0.05mm) is provided near the temple end of the lens. In near-eye AR mode, the total reflection layer 1041 is in a dark position (reflectivity >95%), and light enters the eye through the semi-transparent and semi-reflective film 1043 (transmittance 50%). In external projection mode, the total reflection layer 1041 moves to a light position (transmittance >90%), and light is projected through the projection compensation optical module 106 (metasurface correction lens, phase modulation depth 2π). The detection module 103 (TOF depth camera ranging accuracy ±2%@1m) uses feedback to adjust the spacing of the optical modules (adjustment range 0.5-3mm) to achieve image quality optimization (RMS radius <1μm) within a distance of 0.5-3m.

[0065] like Figure 4 As shown, the image output from the display light engine module 108 (Micro-LED chip, peak brightness 2000 nits) is coupled into the lens 201 via the temple optical module 107 (Fresnel lens, focal length 10mm). A rotatable total internal reflection prism 1042 (K9 glass material, size 6×8mm, apex angle 45°±0.1°) is located at the end of the lens, driven by a stepper motor (model 16HS19-2004S, step angle 1.8°), with a switching time of <300ms. In near-eye AR mode, the prism is in the position shown in the diagram, and light enters the eye through the semi-transparent and semi-reflective film 1043 (Ag alloy film, reflectivity 50%) after total internal reflection. In projection mode, the prism rotates 90° (positioning accuracy ±0.5°), and light exits through the triangular plane to the projection compensation optical module 106 (aspherical zoom lens, magnification 1-3×). The system acquires projected images through the detection module 103 (RGB camera resolution 1920×1080), analyzes the distortion, and then adjusts the optical axis offset (±1° range) to achieve image quality stability (distortion rate <5%) at tilt angles of ±30°.

[0066] like Figure 5As shown, the light engine module 108 (0.2-inch Micro-LED chip, 1280×720 resolution) outputs an image as the object plane, and the power supply and control circuit 111 (3.7V lithium battery, 5-hour battery life) provides the drive. The image is coupled into the lens 201 (PMMA material, 2.5mm thickness) through the temple optical module 107 (aspherical lens, 12mm focal length). A movable light shield 202 (polyimide material, 6×10mm size, light transmittance <0.1%) is provided near the temple end of the lens. It is driven by a mechanical moving gear 203 (module 0.2, transmission ratio 50:1), with a movement range of 0-15mm and a response time of <300ms. In near-eye AR mode, the light-blocking plate 202 blocks the external projection light path (light attenuation >40dB), and the split light beam (50% transmittance of the semi-transparent and semi-reflective film 1043) is reflected into the eye. In common display mode, the light-blocking plate 202 is open (transmittance >90%), and the light is projected through the projection compensation optical module 106 (metasurface lens, 45° field of view). The detection module 103 (RGB camera sampling rate 30fps) provides feedback control to adjust the size (15-40 inches) and position (positioning accuracy ±3mm) of the projected image, and optimizes the image quality through computational imaging (MTF@50lp / mm improved to 0.65).

[0067] The display light engine module 108 in this embodiment consists of a single image source, employing a 0.3-inch LCOS chip (resolution 1920×1080, pixel pitch 5.4μm). The driving circuit integrates an FPGA (10K logic units) and a MIPI interface (transmission rate 3.2Gbps). For monochrome display, a 635nm laser diode (3mW power, linewidth <2nm) is used, while for full-color display, sequential RGB color combining is employed (color wheel speed 6000rpm, color gamut coverage 120% sRGB). The light source lifespan is >30,000 hours, operating temperature is -20℃~60℃, and power efficiency is >85%.

[0068] This embodiment employs a single image source structure, achieving mode switching through the following methods: 1) Mechanical switching: A stepper motor (model 16HS19) drives the display module to rotate (0-90°, positioning accuracy ±0.5°), or the optical module to translate (displacement range 0-5mm, transmission accuracy 0.01mm); 2) Beam splitting: A semi-transparent prism (transmittance 50% ±2%, reflectivity 50% ±2%) or a diffraction grating (period 1μm, first-order diffraction efficiency >80%) splits the beam, and an aperture stop (aperture range 1-6mm, adjustment step 0.1mm) controls the optical path. Mode switching time <500ms, channel crosstalk <-30dB.

[0069] The optical module 107 and the compensation optical module 106 in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

[0070] The optical combiners 1041, 1042, and 1043 in this embodiment are used for mixing ambient light and virtual light. The specific components are similar to those in Embodiment 1. However, in this embodiment, the influence of different optical combiners on the switching of the two display channels needs to be considered.

[0071] The detection module, voice control, and touch control module in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

[0072] The working process of the optical structure is as follows: Figure 8 As shown, the specific working status is as follows:

[0073] The working process of the optical structure is as follows: Figure 8 As shown, the specific working status is as follows:

[0074] The optical device is activated (start-up time < 2s), and the display light engine module 108 generates a micro-display image (brightness uniformity > 92%). The output image is coupled into the lens 201 via the optical module 107 (light flux loss < 10%). Mode selection is achieved by translating the total reflection layer 1041 (driven by magnetostriction, response time < 200ms), rotating the total reflection prism 1042 (driven by a stepper motor, rotation accuracy ± 0.3°), or splitting the beam with the semi-transparent and semi-reflective film 1043 (polarization extinction ratio > 200:1). The mechanical moving gear 203 controls the opening and closing of the light-shielding plate 202 (shielding rate > 99%). Near-eye AR light is reflected by a semi-transparent and semi-reflective film 1043 (reflection efficiency >95%) and enters the eye (eye box 12×10mm); the detection module 103 samples at 30fps, with feedback control delay <50ms, and adjusts the size (10-50 inches), position (±2mm positioning accuracy) and image quality (distortion rate <1%, clarity improved by 40%) of the projected image.

[0075] Example 4

[0076] like Figure 6 , Figure 7As shown, this invention provides a multifunctional glasses structure that can be used for both real-world projection and near-eye display. This structure consists of a single image source and employs a lightweight waveguide design (waveguide thickness 1.2mm, weight <5g). A micro servo motor (model SG90) drives a rotatable light display module 204 (rotation angle 0-180°, positioning accuracy ±1°) and a polarization multiplexing element (liquid crystal polarizer, response time <20ms) to achieve channel switching. The display light engine module uses a 0.2-inch Micro-OLED chip (resolution 1280×720, peak brightness 1200nit), and the driving circuit integrates a power management unit (efficiency >90%). The output image is coupled via an optical module 107 (aspherical composite lens group, focal length 10mm, transmittance >92%) into a light combiner module (diffractive waveguide, coupling efficiency >85%) or a projection compensation optical module 106 (liquid zoom lens, focusing range 0.3-5m).

[0077] like Figure 6 As shown, the display light engine module 108 (LBS laser scanning module, wavelength 450 / 520 / 635nm, scanning angle ±15°) outputs images, the power supply and control circuit 111 (lithium battery capacity 400mAh, fast charging for 30 minutes) provides drive, and the temple optical module 107 (metasurface lens, phase modulation depth 2π) couples the image to the rotatable light display module 204 (rotation range 0-90°, switching time <400ms). In near-eye display mode, module 204 is in the clear position, and the image is coupled into the wedge-shaped waveguide 1044 (BK7 glass substrate, 1.1mm thickness), propagated through total internal reflection (reflection count <10 times) to the optical output element 1045 (first-order diffraction grating, period 500nm, diffraction efficiency >85%), and then vertically exits into the human eye (field of view 35°±2°). In external projection mode, module 204 rotates to the blurred position, and the image is projected through the projection compensation optical module 106 (image-side telecentric design, distortion <1%). The detection module 103 (TOF depth camera + RGB camera) provides feedback control, optimizing image quality by adjusting the rotation angle of module 204 (±0.5° accuracy) and the compensation lens spacing (0.1mm steps). The fiber optic image transmission alternative uses a multimode fiber bundle (core diameter 50μm, numerical aperture 0.22, image resolution 720p).

[0078] like Figure 7As shown, the image output from the display light engine module 108 (LCOS chip, 1920×1080 resolution) serves as the object plane, driven by the power supply and control circuit 111 (3.7V / 500mAh lithium battery). The image is coupled into the optical waveguide 1046 (BK7 glass substrate, 1.1mm thickness) via the temple optical module 107 (aspherical lens group, focal length 12mm, transmittance >92%). The output light from the display module is a superposition of left-handed (450nm) and right-handed (635nm) circularly polarized light (extinction ratio >1000:1), including a polarizing element (polarizer transmittance >90%) and a quarter-wave plate (retardation λ / 4@550nm). The polarization multiplexing coupling element 1047 is a holographic grating (600nm period, 85% diffraction efficiency), which deflects left-handed light by 90° into the waveguide for total internal reflection (reflection count <8 times), while right-handed light is directly transmitted. The near-eye display light path exits perpendicularly into the human eye via the polarization multiplexing coupling element 1048 (2D grating array, 500nm period) (field of view 32°±1°). The external projection light path is coupled to the compensation optical module 106 (liquid lens, focusing range 0.5-3m) via right-handed light for projection. The detection module 103 (TOF depth camera + RGB camera) provides feedback control, optimizing image quality by adjusting the lens spacing (±0.1mm) and polarization direction (electro-controlled liquid crystal polarizer), achieving a distortion rate of <1.5% and a 35% improvement in sharpness.

[0079] The display light engine module 108 in this embodiment uses a 0.3-inch Micro-OLED chip (peak brightness 1500 nits, contrast ratio 100000:1), and integrates a polarization control unit: a linear polarizer (transmittance >92%, extinction ratio >2000:1) and a quarter-wave plate (quartz material, thickness 560μm), outputting circularly polarized light (left-hand / right-hand polarization switching time <10ms). The multi-source solution uses two 0.2-inch Micro-LEDs (outputting left-hand / right-hand polarized light respectively), which are combined through a cubic prism (combination efficiency >95%), and the driving circuit supports independent brightness control (adjustable from 0-1000 nits).

[0080] In this embodiment, diffraction or polarization-based micro / nano elements are used for light beam splitting: a metasurface beam splitter (3×3mm in size, phase modulation accuracy ±5°) or a polarization holographic grating (period 800nm, first-order diffraction efficiency >80%). The display light engine module 108 outputs polarization superposition combinations including: left-handed + right-handed circular polarization (ratio 1:1) and P-beam + S-beam (orthogonal polarization directions), and beam splitting is achieved through a polarization multiplexing coupling element (liquid crystal polymer grating) (crosstalk <-30dB). Mode selection is achieved by controlling the polarization state of the light source, such as the near-eye mode outputting left-handed polarization (purity >99%) and the projection mode outputting right-handed polarization (purity >99%).

[0081] The optical module 107 and the compensation optical module 106 in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

[0082] The optical combiner module in this embodiment is used for the propagation of virtual light and its mixing with ambient light. It employs a double-layer optical waveguide structure (substrate thickness 1.2 mm, ambient light transmittance > 85%). Coupling element parameters: 1045 is a metasurface mirror (reflectivity > 90% @ 400-700 nm), 1047 is a polarization holographic grating (period 550 nm, left-handed diffraction efficiency 88%), and 1048 is a geometric micromirror array (mirror size 50 × 50 μm, reflectivity > 95%). The transmissive element uses holographic polymer-dispersed liquid crystal (HPDLC), with a diffraction efficiency > 85% and a response time < 200 ms.

[0083] The detection module, voice control, and touch control module in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

[0084] The working process of the optical structure is as follows: Figure 8 As shown, the specific working status is as follows:

[0085] When the optical device is activated (start-up time < 2.5s), the display light engine module 108 generates a micro-display image (brightness uniformity > 90%), and the output image is coupled into waveguide 1044 or 1046 via the optical module 107 (light flux loss < 12%). Mode selection is achieved through the rotatable light display module 204 (rotation angle 0-90°, positioning accuracy ± 0.5°) or polarization multiplexing (liquid crystal polarizer switching time < 50ms). Near-eye display light is reflected by total internal reflection in the waveguide (propagation loss <0.5dB / cm), then deflected by the coupling element 1045 / 1048 (outlet angle accuracy ±0.3°) and enters the human eye (eye box 10×8mm); the actual projection light is projected through the compensation optical module 106 (MTF@30lp / mm>0.7), the detection module 103 samples at 30fps, the feedback control delay is <60ms, and the size (12-45 inches), position (±2.5mm positioning accuracy), and image quality (RMS radius <1.2μm) of the projected image are adjusted.

[0086] Structural parameters not mentioned in this embodiment are the same as those in Embodiments 1 and 2, and will not be repeated here.

[0087] The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of the present invention without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A multi-functional glasses for both real projection and near-eye display, characterized in that: The display light engine module, the temple optical module, the optical combiner module, the external projection module, and the detection module are included. The display light engine module is used to provide an image source, including an active micro display chip or a laser scanning module and its driving and power supply parts. The temple optical module receives the light output by the display light engine module and conducts and branches the light path. The optical combiner module is connected with the temple optical module and is used to couple part of the light into the human eye to form a virtual image, realizing near-eye display. The external projection module is connected with the temple optical module and is used to project another part of the light to an external real surface to form a real image. The detection module is used to detect the size, position and image quality of the external projection image and feeds back to the control unit to adjust the optical module parameters to realize image quality optimization. The temple optical module includes an optical projection assembly and a near-eye optical assembly. The optical projection assembly is used for focusing and correcting the external projection light path, and the near-eye optical assembly is used for imaging regulation of the near-eye display light path. The optical assembly at least includes a spherical lens, an aspherical lens or a Fresnel lens, or uses a super surface, a grating, a holographic element and other diffractive devices. The external projection light path adopts a far field design, and the near-eye display light path can be directly in the eye through the optical combiner or form a retinal projection. The optical combiner module is used for mixing virtual light and ambient light, including a light waveguide, a free-form surface or a semi-transparent and semi-reflective device, whose coupling elements adopt reflective or transmissive micro-nano elements, including a super surface, a diffraction grating, a geometric micro-mirror, a holographic element or a polarization volume holographic element. The detection module is arranged on the frame or the temple and has field of view coverage and depth recognition functions. The clarity, brightness and distortion of the projected image are sampled in real time and fed back to the control unit to adjust the distance, refractive index or optical axis offset of the optical assembly, realizing automatic focusing and image quality optimization. The light path switching of the external projection module and the temple optical module is realized through light path channel switching, selective propagation of light beams or polarization multiplexing elements.

2. The dual-purpose glasses for reality projection and near-eye display according to claim 1, characterized in that: Two working modes can be realized. In the common display mode, the external projection module and the optical combiner module work simultaneously to project a real image and couple a virtual image, respectively. In the single display mode, only the external projection module works or only the optical combiner module works. The images in the two modes can be the same or different, supporting independent control and superimposed display of binocular and bilateral projection.

3. The dual-purpose glasses for reality projection and near-eye display according to claim 1, characterized in that: A single image source or a multi-image source scheme is adopted. In the multi-image source scheme, the image sources of the external projection and the near-eye display are independently arranged, and the optical channels can be partially shared or completely separated. In the single image source scheme, the image sources are shared through time division multiplexing, polarization multiplexing or light path switching, and the optical assemblies are partially shared.

4. The dual-purpose glasses for reality projection and near-eye display according to claim 1 or 3, characterized in that: In the single image source scheme, different images of the external projection and the near-eye display are switched through fast time division multiplexing. In the common display mode, the same content is displayed in the two modes when a single image is output by the image source, and different contents are displayed when time multiplexing is adopted. The image outputs can be the same or different during the mode switching process.

5. The dual-purpose glasses for reality projection and near-eye display according to claim 1 or 3, characterized in that: Under the structure of a single image source, light path switching is achieved by at least one of the following methods: mechanical switching, using a stepper motor to drive a gear rack structure to make the display module, optical module or optical combiner module rotate, translate or compound to change the light path; optical beam splitting, using a semi-transparent and semi-reflective element, a prism or a diffractive optical element to split the light into near-eye display light path and external projection light path; electronic control, using a liquid crystal light valve to change the transparency or reflectivity to control the light transmission path.

6. The dual-purpose glasses for reality projection and near-eye display according to claim 1 or 5, characterized in that: Mode selection is achieved by opening and closing through light shielding baffle or polarization / diffraction multiplexing; the light shielding baffle is driven by a motor to move along the guide rail, which can accurately block the near-eye display light path or the external projection light path, and is equipped with a position sensor to realize closed-loop control; the polarization / diffraction multiplexing is achieved by outputting light with a specific polarization direction from the display module, which matches the polarization / diffraction characteristics of the coupling beam splitting element, to realize the selective conduction of the light path channel.

7. The dual-purpose glasses for reality projection and near-eye display according to claim 1, characterized in that: The optical structure design includes a common optical component optimization step, which first optimizes the lens aperture, focal length, thickness and material of the near-eye optical component to match the optical combiner, and then designs the external projection module based on the common component parameters, so that the projection light path focal length and aperture meet the imaging requirements, and the real image plane is optimized by adjusting the lens group spacing to reduce distortion and improve the RMS radius.

8. The dual-purpose glasses for reality projection and near-eye display according to claim 1 or 7, characterized in that: The optical module includes spherical lenses, aspherical lenses, Fresnel lenses, super surfaces or diffraction gratings, and the projection supplement module realizes image quality correction at different distances and inclination angles through mechanical focusing (motor-driven lens spacing) or electronic focusing (liquid crystal zoom lens / liquid lens), combined with multi-layer coating and telecentric design to ensure high transmittance and low dispersion.

9. The dual-purpose glasses for reality projection and near-eye display according to claim 1 or 5, characterized in that: The optical combiner includes a beam splitter, a semi-transparent and semi-reflective film, a waveguide or a free-form surface, which is used for mixing ambient light and virtual light; the combiner position does not affect the ambient light imaging when the light path is switched, and the combiner, optical module and display module are all controlled by the feedback of the detection module to adapt to different refractive powers and eye positions.

10. The dual-purpose glasses for reality projection and near-eye display according to claim 1, characterized in that: The detection module performs the following operations: environment recognition to determine the optimal projection position, and collection of projection images for edge positioning and image quality analysis; data processing is realized through a mirror leg micro-processing chip or wireless transmission to an external device; image correction is realized by adjusting the optical component spacing, optical axis or display module output parameters to optimize the clarity and correct the distortion of the projection image.

Images