Intelligent glasses and method for achieving beauty lens effect thereof

Abstract

The application discloses an intelligent glasses and a method for realizing the effect of beauty lenses, the intelligent glasses comprising: a glasses frame; a lens arranged on the glasses frame; an eyeball tracking module arranged on the glasses frame and used for acquiring an eye image of a wearer; an outward optical modulation module arranged on the surface of the lens or inside the lens, comprising a two-dimensional array of a plurality of micro optical units, each micro optical unit being independently controllable to modulate the spectral characteristics of the outward propagating light; and a processing module used for determining the pupil position of the wearer according to the eye image, and determining the activation area of the outward optical modulation module according to the projection position of the pupil on the lens plane; the processing module is further used for controlling the micro optical units located in the activation area to perform spectral modulation on the light propagating outward from the eye of the wearer according to a preset target color, so as to realize the dynamic and interactive change of the observed iris color without contacting the eye and changing the iris characteristics of the wearer.

Description

Technical Field

[0001] This invention relates to the fields of wearable smart devices and computer vision technology, and in particular to a smart pair of glasses and a method for achieving a colored contact lens effect. Background Technology

[0002] As people's living standards continue to improve, they are paying more and more attention to their personal image. Some people like to use makeup to beautify themselves, and many women spend a lot of time and energy on makeup, especially focusing on eye makeup.

[0003] Currently, methods for altering the appearance of the iris can be broadly categorized into two types: physical contact methods and digital processing methods. Physical contact methods are exemplified by colored contact lenses (also known as iris contact lenses). These lenses are classified as Class III medical devices, and their core principle is to directly cover the cornea through physical contact, thereby changing the appearance of the iris. Mainstream colored contact lenses employ a "sandwich" structure: two layers of transparent, soft lens material (such as HEMA or silicone hydrogel) sandwiching a pigment layer that mimics the texture of the iris. This pigment layer can use traditional dyes or novel photonic crystal materials (producing color through periodic micro / nano-structure diffraction). When worn, the transparent optical zone at the center of the lens corrects vision, while the outer pigment layer blocks or alters the color of light reflected or transmitted by the iris, allowing others to perceive different pupil colors. However, this physical contact method has the following drawbacks: long-term wear may cause corneal hypoxia, infection, dry eye, corneal abrasion, and other eye diseases, and the risks are even higher if not properly cared for; the process of putting on and taking off the lens is cumbersome, requires high hygiene standards, and is not suitable for people with sensitive eyes; the color and pattern of each lens are fixed during manufacturing and cannot be dynamically or in real time changed; some users may also experience discomfort from a foreign body. Another related technology is electrochromic lenses, which are mainly used to automatically adjust the light transmittance according to ambient light or electrical signals to achieve a sun-blocking effect similar to sunglasses. Electrochromic lenses typically use a "sandwich" structure, including two transparent substrates, two transparent conductive layers (such as ITO), an electrochromic layer, an electrolyte layer, and an ion storage layer. The working principle is as follows: when a low voltage is applied between the two transparent conductive layers, ions in the electrolyte migrate to the electrochromic layer, triggering a redox reaction in the material, causing a reversible change in its optical properties, which macroscopically manifests as the overall color of the lens darkening or returning to transparency. However, this process is a uniform color change, primarily aimed at adjusting the amount of light entering the eye. The color transitions are inflexible, typically switching only between transparent and a few dark shades, failing to achieve personalized or dynamic changes to the iris's appearance. Furthermore, digital processing solutions (such as beauty filters and AR applications) only affect digital images or video streams and cannot alter the pupil color as directly observed by the naked eye in the real world, lacking physical real-time capability.

[0004] Therefore, how to enable others to observe the dynamic and interactive changes in iris color without touching the eyes or altering the wearer's own iris characteristics has become an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides a smart glasses and a method for achieving the effect of colored contact lenses, so as to enable the observer to observe the dynamic and interactive changes of iris color without touching the eyes or changing the wearer's own iris characteristics.

[0006] According to one aspect of the present invention, smart glasses are provided, comprising: Eyeglass frames; Lenses are mounted on the eyeglass frame; An eye-tracking module, mounted on the frame, is used to acquire real-time images of the wearer's eyes; An outward optical modulation module is disposed on the surface of the lens or integrated inside the lens. The outward optical modulation module includes a two-dimensional array composed of multiple micro optical units, each of which can be independently controlled to modulate the spectral characteristics of outwardly propagating light. The processing module is connected to the eye-tracking module and the outward optical modulation module, respectively. The processing module is used to determine the wearer's pupil position based on the eye image, and to determine the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane. The processing module is also used to control the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eye according to a preset target color, so that the light propagating outward from the wearer's eye presents the target color.

[0007] Optionally, the eye-tracking module includes an infrared light source and an infrared camera; the infrared light source is used to emit infrared light towards the wearer's eyes; the infrared camera is used to capture infrared images of the wearer's eyes; The processing module is also used to identify the pupil center and corneal reflection point based on the infrared image, determine the position of the pupil based on the position of the pupil center relative to the corneal reflection point, and determine the wearer's gaze direction based on the relative position vector of the pupil center and the corneal reflection point.

[0008] Optionally, the outward optical modulation module includes a liquid crystal spectrally tunable filter; Each of the aforementioned micro-optical units is a liquid crystal pixel unit in the liquid crystal spectral tunable filter, and the liquid crystal pixel unit can independently adjust the transmission spectrum of outwardly propagating light based on the voltage applied by the processing module.

[0009] Optionally, the smart glasses also include: A directional optical structure includes multiple microlenses, each of which is disposed on the light-emitting side of a micro-optical unit; the directional optical structure is used to constrain the light emitted by the driven micro-optical unit to be emitted within a preset angle range toward the observer.

[0010] Optionally, the smart glasses also include: An auxiliary light source is used to emit broadband illumination light towards the wearer's eye area; the processing module is also used to turn on the auxiliary light source when the ambient light intensity is lower than a preset threshold, and control the outward optical modulation module to perform spectral modulation on the light emitted by the auxiliary light source so that the light propagating outward from the wearer's eyes presents the target color.

[0011] Optionally, the outward optical modulation module includes a digital micromirror device; Each of the micro-optical units includes a deflectable micro-mirror that can adjust its deflection angle based on the voltage applied by the processing module to control the direction of the reflected light. The smart glasses also include: A multicolor light source, disposed on the frame, is used to provide light to be reflected to the digital micromirror device. The multicolor light source includes light-emitting units of at least two different colors. The processing module is also used to control the luminous intensity ratio of each color light-emitting unit in the multicolor light source according to the preset target color, so that the multicolor light source emits light to be reflected with the target color; and to control the micromirror device located in the activation area to be turned on, so that the light to be reflected is reflected to the outside, so that the light propagating outward from the wearer's eyes presents the target color.

[0012] Optionally, the smart glasses also include: An ambient light sensor is mounted on the frame of the glasses and is used to detect the spectral distribution of ambient light in real time. The processing module is further configured to calculate a spectral compensation amount based on the target color and the spectral distribution of the ambient light, and control the micro-optical unit located in the activation area to emit compensation light based on the spectral compensation amount; wherein, after the compensation light is superimposed on the ambient light, the light propagating outward from the wearer's eyes presents the target color.

[0013] Optionally, the smart glasses also include: An interactive module, located on the frame, is used to receive input commands from the wearer to set or switch the target color; The interaction module includes at least one of a voice recognition module, a touch sensor, and a wireless communication module for communicating with external terminal devices.

[0014] Optionally, the activation region is the area on the outward optical modulation module that corresponds to the wearer's current iris position; The processing module is further configured to determine the projection area of ​​the iris on the lens plane based on the projection position of the pupil on the lens plane and in combination with the preset geometric relationship between the pupil and the iris, and to use the projection area of ​​the iris on the lens plane as the activation area.

[0015] According to another aspect of the present invention, a method for achieving a colored contact lens effect in smart glasses is provided, based on the smart glasses implementation described in any embodiment of the present invention, comprising: The eye-tracking module acquires real-time images of the wearer's eyes. The processing module determines the wearer's pupil position based on the eye image and determines the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane. The processing module controls the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eyes according to the preset target color, so that the light propagating outward from the wearer's eyes presents the target color.

[0016] Optionally, controlling the micro-optical unit located within the activation region to spectrally modulate light propagating outward from the wearer's eye includes: When the outward optical modulation module includes a liquid crystal spectrally tunable filter, the transmission spectrum of the liquid crystal pixel unit is adjusted by applying a voltage to the liquid crystal pixel unit located in the active region of the liquid crystal spectrally tunable filter; or, When the outward optical modulation module includes a digital micromirror device, by controlling the luminous intensity ratio of each color light-emitting unit in the multicolor light source, the multicolor light source emits light of the target color to be reflected, and the micro mirror located in the activation area of ​​the digital micromirror device is controlled to be in the open state, so as to reflect the light to be reflected to the outside.

[0017] Optionally, the smart glasses further include an ambient light sensor; the method for achieving the colored contact lens effect in the smart glasses further includes: The ambient light sensor detects the spectral distribution of ambient light in real time. The processing module calculates the spectral compensation amount based on the target color and the spectral distribution of the ambient light, and controls the micro-optical unit located in the activation area to emit compensation light based on the spectral compensation amount, so that the compensation light and the ambient light are superimposed to present the target color.

[0018] The technical solution provided by this invention acquires real-time images of the wearer's eyes through an eye-tracking module. The processing module then precisely determines the pupil position and maps it to an activation area on the lens plane. This allows the outward optical modulation module to independently modulate the micro-optical units within the activation area, achieving selective color change of outward-propagating light without any contact with the cornea. This completely avoids the health risks and discomfort associated with traditional contact lenses, such as hypoxia and infection. Secondly, because the processing module can control the micro-optical units within the activation area in real-time according to a preset target color, users can freely switch or dynamically change the pupil color and pattern through an interactive module, overcoming the limitation of electrochromic technology being unsuitable for iris color customization. Furthermore, the color change of this invention is directly presented in real-world physical light, observable to the naked eye, unlike beauty filters that only work on digital images. This provides a realistic, natural, and real-time interactive experience of iris appearance changes. In summary, this invention achieves dynamic adjustment of the iris color as observed by others without contact with the eye or alteration of the individual's iris characteristics.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a smart glasses provided in an embodiment of the present invention; Figure 2 This is a structural block diagram of a portion of the structure of a smart glasses provided in an embodiment of the present invention; Figure 3 This is a flowchart illustrating the operation of smart glasses according to an embodiment of the present invention; Figure 4 This is a structural block diagram of a partial structure of another smart glasses provided in an embodiment of the present invention; Figure 5 This is a structural block diagram of a partial structure of another smart glasses provided in an embodiment of the present invention; Figure 6 This is a flowchart of a method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention; Figure 7This is a flowchart of another method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention; Figure 8 This is a flowchart of another method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0023] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0024] This invention provides a smart glasses, Figure 1 This is a schematic diagram of the structure of a smart glasses provided in an embodiment of the present invention. Figure 2 This is a structural block diagram of a portion of the structure of smart glasses provided in an embodiment of the present invention, for reference. Figure 1 and Figure 2 Smart glasses include: Frame 10; Lens 20 is mounted on frame 10; An eye-tracking module 30 is mounted on the frame 10 and is used to acquire real-time images of the wearer's eyes. An outward optical modulation module 40 is disposed on the surface of the lens 20 or integrated inside the lens 20. The outward optical modulation module 40 includes a two-dimensional array composed of multiple micro optical units, each of which can be independently controlled to modulate the spectral characteristics of outwardly propagating light. The processing module 50 is connected to the eye-tracking module 30 and the outward optical modulation module 40, respectively. The processing module 50 is used to determine the position of the wearer's pupil based on the eye image, and to determine the activation area of ​​the outward optical modulation module 40 based on the projection position of the pupil on the plane of the lens 20. The processing module 50 is also used to control the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eye according to the preset target color, so that the light propagating outward from the wearer's eye presents the target color.

[0025] Specifically, the smart glasses include a frame 10, lenses 20, an eye-tracking module 30, an outward optical modulation module 40, and a processing module 50. The frame 10 supports and secures the other components; its shape and size can be adapted to ordinary or fashionable glasses. The frame 10 includes a lens frame 11 and temples 12. The lens frame 11 is used to mount and secure the lenses 20, which can be made of transparent optical materials (such as polycarbonate or glass) with high light transmittance to ensure the wearer can clearly see the external environment. The temples 12 are hinged to both sides of the lens frame 11 to secure the glasses to the wearer's ears. The eye-tracking module 30 is mounted on the frame 10, for example, on the inside of the lens frame 11 near the bridge of the nose or on the temples 12 near the lens frame 11, without affecting the wearer's normal field of vision or appearance. The eye-tracking module 30 is used to acquire real-time images of the wearer's eyes.

[0026] An outward optical modulation module 40 is disposed on the surface of the lens 20 or integrated inside the lens 20. As one implementation, the module can be attached to the front surface of the lens 20 (i.e., the side facing outwards), or embedded within the lens 20 material using processes such as nanoimprinting or etching, to achieve a compact design. The outward optical modulation module 40 comprises a two-dimensional array of multiple micro-optical units, each of which can be independently controlled to modulate the spectral characteristics of outwardly propagating light. "Outwardly propagating light" refers to light traveling from the wearer's eye region (especially the iris surface) towards an observer.

[0027] The processing module 50 is electrically connected to both the eye-tracking module 30 and the outward optical modulation module 40. The processing module 50 may be an embedded microcontroller, digital signal processor (DSP), or application-specific integrated circuit (ASIC), integrated within the frame 10, for example, housed in the temple 12. The processing module 50 is configured to perform the following operations: First, based on the eye image acquired by the eye-tracking module 30, determine the pupil position of the wearer A. Second, based on the projection position of the pupil onto the plane of the lens 20, the processing module 50 determines the activation area of ​​the outward optical modulation module 40. Since the lens 20 is located in front of the eyeball, and the relative position of the eye-tracking module 30 and the lens 20 is fixed, the processing module 50 can project the center of the pupil onto the plane of the lens 20 through geometric transformation, thereby obtaining a circular or elliptical region based on the projection position of the pupil onto the plane of the lens 20. This region is determined as the activation area. The activation area includes at least the projection area of ​​the iris onto the lens 20.

[0028] Finally, the processing module 50 acquires a preset target color and, based on this target color, controls the micro-optical units located within the activation area to perform spectral modulation on the light propagating outward from the wearer's eyes. The outward optical modulation module 40 is a two-dimensional array composed of multiple micro-optical units, each with a fixed physical address. The processing module 50 maps the calculated activation area to the corresponding micro-optical units in the array and sends driving signals to these units, while units outside the activation area are not driven. This achieves precise and localized spectral modulation of the outward-propagating light, ensuring that the light propagating outward from the wearer's eyes displays the target color. Here, the preset target color can be any color selected by the user through an interaction module, such as the voice recognition module 61, for example, "sea blue," "amber," or "emerald green."

[0029] Figure 3 This is a flowchart illustrating the operation of smart glasses according to an embodiment of the present invention. Figure 3 The image shows the profiles of observer B and wearer A, with wearer A wearing the smart glasses. Figure 3 The diagram also schematically illustrates the actual iris color of wearer A and the iris color seen by observer B, to demonstrate that the iris color seen by observer B through the smart glasses of this invention differs from the actual iris color of wearer A. Figure 3 An example is shown where observer B sees the iris color as sea blue, while wearer A's actual iris color is amber. This achieves a dynamic change in pupil color from another person's perspective, while wearer A's own iris characteristics remain unchanged.

[0030] The technical solution provided by this invention acquires real-time images of the wearer A's eyes through an eye-tracking module 30. The processing module 50 then precisely determines the pupil position and maps it to an activation area on the lens 20 plane. This allows the outward optical modulation module 40 to independently modulate the micro-optical units within the activation area, achieving selective color change of outward-propagating light without any contact with the cornea. This completely avoids the health risks and discomfort associated with traditional contact lenses, such as hypoxia and infection. Secondly, since the processing module 50 can control the micro-optical units within the activation area in real-time according to a preset target color, users can freely switch or dynamically change the pupil color and pattern through an interactive module, overcoming the limitation of electrochromic technology being unsuitable for iris color customization. Furthermore, the color change of this invention is directly presented in real-world physical light, observable by the naked eye, unlike beauty filters that only work on digital images. This provides a realistic, natural, and real-time interactive experience of iris appearance changes. Therefore, this invention achieves dynamic adjustment of the iris color as observed by others without contact with the eye or alteration of the wearer's own iris characteristics.

[0031] The smart glasses provided by this invention have a wide range of applications. In the fashion and beauty field, they can serve as a non-contact makeup tool for changing eye color at any time, meeting users' immediate needs for personalized appearance; in the medical assistance field, they can provide appearance simulation functions for patients with iris defects or albinism caused by eye diseases or injuries, assisting them in psychological development and social interaction; in the entertainment and performance field, they can be used in film and television shooting, stage performances, and other scenarios to quickly achieve special eye color effects for actors or performers (such as heterochromia, vertical pupils, luminous pupils, etc.).

[0032] Based on the above embodiments, optionally, the eye-tracking module 30 includes an infrared light source and an infrared camera; the infrared light source is used to emit infrared light towards the eyes of the wearer A; the infrared camera is used to acquire infrared images of the wearer A's eyes; the processing module 50 is also used to identify the pupil center and corneal reflection point based on the infrared image, determine the position of the pupil based on the position of the pupil center relative to the corneal reflection point, and determine the direction of the wearer A's gaze based on the relative position vector between the pupil center and the corneal reflection point.

[0033] Specifically, the eye-tracking module 30 may include at least one infrared light source and an infrared camera. The infrared light source emits invisible infrared light toward the wearer A's eyes, and the infrared camera captures the infrared image reflected from the eyes. Because infrared light is non-irritating to the human eye and is not interfered with by visible light, clear pupil and corneal features can be obtained.

[0034] When infrared light shines into wearer A's eye, the cornea, being the outermost transparent curved surface of the eye, reflects the incident infrared light specularly, forming a bright small spot. This spot is called the "corneal reflector spot" or "Pulchin spot." It is noteworthy that because the relative position of the infrared light source and the frame 10 is fixed, the position of the corneal reflector spot in the infrared image remains essentially unchanged and does not shift with eye movement. Meanwhile, the pupil area (the opening in the center of the iris) appears as a well-defined, dark circular area in the infrared image due to the lack of reflective tissue. When wearer A's eye moves, the position of the pupil center shifts noticeably in the image.

[0035] In the process of identifying the pupil center and corneal reflection point based on the infrared image, the processing module 50 first preprocesses the infrared image, including operations such as filtering and denoising, histogram equalization, and binarization segmentation, to enhance the contrast between the pupil region and the corneal reflection point. Then, through edge detection and ellipse fitting algorithms, it accurately identifies the pupil boundary and calculates the pupil center coordinates, while simultaneously determining the center coordinates of the corneal reflection point. After determining the pupil center coordinates and the center coordinates of the corneal reflection point, it calculates the position vector of the pupil center relative to the corneal reflection point, i.e., the two-dimensional vector pointing from the corneal reflection point to the pupil center.

[0036] This vector reflects the eye's deflection state in the current gaze direction. When the gaze direction changes, the pupil center shifts relative to the corneal reflection point, and the direction and length of this vector change accordingly. To convert the above vector into a specific gaze direction, the processing module 50 needs to perform a calibration process beforehand. During the calibration process, the wearer A sequentially gazes at several target points with known coordinates on the screen (e.g., the upper left, upper right, center, lower left, and lower right positions on the screen). For each gaze point, the eye-tracking module 30 records the corresponding pupil-corneal reflection vector. The processing module 50 uses these vectors and the known gaze point coordinates to establish a mapping model, for example, through multinomial fitting or neural network regression, to fit the transformation relationship between the vector space and the screen coordinate space.

[0037] After calibration, in actual use, the processing module 50 calculates the pupil-corneal reflection vector in each frame of the image in real time and substitutes it into the pre-established mapping model to deduce the spatial position of the wearer A's current gaze. This gaze direction information can be further used to determine the projection position of the pupil on the plane of the lens 20, thereby achieving dynamic and precise tracking of the activated area of ​​the outward optical modulation module 40.

[0038] Based on the above embodiments, optionally, the activation area is the area on the outward optical modulation module 40 that corresponds to the current iris position of the wearer A; the processing module 50 is also used to determine the projection area of ​​the iris on the plane of the lens 20 based on the projection position of the pupil on the plane of the lens 20 and in combination with the preset geometric relationship between the pupil and the iris, and to use the projection area of ​​the iris on the plane of the lens 20 as the activation area.

[0039] Specifically, since the lens 20 is located in front of the eyeball, and the relative positional relationship between the eye-tracking module 30 and the lens 20 has been pre-calibrated, the processing module 50 can project the center of the pupil in three-dimensional space onto the two-dimensional plane of the lens 20 through geometric transformation, obtaining a projection point (corresponding to the image of the pupil itself on the lens 20). In this embodiment of the invention, the effect of cosmetic contact lenses needs to change the color of the iris rather than the pupil; therefore, the activation area should cover the entire iris area. The processing module 50 can pre-store geometric relationship parameters between the pupil and the iris, including but not limited to: the average radius or diameter of the iris, the offset between the center of the pupil and the center of the iris (usually they are basically concentric, allowing for slight offset), and the shape of the iris (e.g., circular or elliptical). These parameters can be obtained by pre-measuring the eye characteristics of the wearer A, or by using statistical averages.

[0040] Based on the aforementioned geometric relationships, the processing module 50 expands outward from the projection point of the pupil on the plane of the lens 20, according to a preset iris radius, to generate a circular or elliptical projection area, which is the projection of the iris onto the plane of the lens 20. When the wearer A's eyeballs move, the position of the pupil projection point is updated in real time, and the processing module 50 recalculates the projection area of ​​the iris accordingly. This ensures that the active area always follows the current iris position of the wearer A, and that the outward optical modulation module 40 only performs spectral modulation in the area corresponding to the iris, while other areas of the lens 20 remain inactive, i.e., transparent.

[0041] When observer B looks into wearer A's eyes, the light rays incident from the external environment onto wearer A's eyes (including the iris surface) do not undergo spectral modulation by the outward optical modulation module 40 during their propagation path, thus carrying the raw spectral information of the ambient light. After being reflected by wearer A's iris surface, these rays propagate outward again and pass through lens 20, passing through the micro-optical units located in the activation area. Since the micro-optical units in this area have been driven and spectrally modulated according to a preset target color (e.g., sea blue), only light of a specific wavelength corresponding to the target color is allowed to pass through the reflected light, while other wavelengths are attenuated or blocked. Ultimately, what enters observer B's eye is spectrally modulated reflected light, whose spectral composition matches the target color, causing observer B to perceive wearer A's pupil as the target color (e.g., sea blue). At the same time, wearer A's own biological characteristics, such as iris pigmentation and texture, do not undergo any substantial changes, thus achieving the effect of dynamically changing the pupil color in another person's vision without altering any of wearer A's own characteristics.

[0042] The technical solution provided by this invention sets the activation area as the region on the outward optical modulation module 40 corresponding to the current iris position of the wearer A, and keeps the micro-optical units outside the activation area in an inactive state. Therefore, the micro-optical unit corresponding to the pupil position remains inactive (i.e., transparent). Since light mainly enters the eye through the pupil when the wearer A observes the external environment, and the micro-optical unit corresponding to the pupil area is inactive and completely transparent, the light incident from the outside to the wearer A's pupil does not undergo any spectral modulation and can enter the wearer A's eye completely and truthfully. This further ensures that the wearer A can clearly observe the external environment through the lens 20, and normal vision is not affected in any way.

[0043] The micro-optical units can be implemented using various technologies. Based on the above embodiments, optionally, in one embodiment of the present invention, the outward optical modulation module 40 is a liquid crystal spectrally tunable filter, and each micro-optical unit is a liquid crystal pixel unit. This liquid crystal pixel unit can independently adjust the transmission spectrum of outwardly propagating light based on the voltage applied by the processing module 50. By changing the voltage, the alignment direction of the liquid crystal molecules can be controlled, thereby selectively transmitting light of a specific wavelength while blocking light of other wavelengths.

[0044] Specifically, each liquid crystal pixel unit adopts a "sandwich" structure, comprising, in sequence: a first polarizer (polarizer), a first transparent conductive layer (e.g., indium tin oxide (ITO), a liquid crystal layer, a second transparent conductive layer, and a second polarizer (analyzer). The transmission axes of the first and second polarizers are perpendicular to each other (i.e., orthogonal polarization configuration), or at other angles depending on design requirements. The liquid crystal layer is filled with a nematic liquid crystal material, whose molecules have a uniform orientation (e.g., parallel to the substrate surface) when no electric field is applied, and the long axis of the molecules forms a certain angle (typically 45°) with the transmission axis of the first polarizer.

[0045] Liquid crystal molecules exhibit optical anisotropy, meaning they have different refractive indices for light parallel to and perpendicular to the long axis of the molecules. When linearly polarized light passes through a liquid crystal layer, it is decomposed into ordinary and extraordinary components. These components travel at different speeds within the liquid crystal layer, resulting in a phase difference Δφ upon exiting the liquid crystal.

[0046] Since Δφ is inversely proportional to the incident wavelength λ (Δφ = 2π×Δn×d / λ, where Δn is the birefringence of the liquid crystal and d is the thickness of the liquid crystal layer), for a fixed Δn and d, light of different wavelengths has different phase differences, resulting in different transmittances. Therefore, the tunable liquid crystal filter exhibits a periodic transmission spectrum, meaning that some wavelengths have high transmittance while others have low transmittance. When the processing module 50 applies a voltage to the liquid crystal layer through the transparent conductive layer, the liquid crystal molecules rotate under the influence of the electric field: the higher the voltage, the more the long axis of the molecules tends to be parallel to the direction of the electric field (perpendicular to the substrate), causing the effective birefringence Δn to gradually decrease, and consequently, the phase difference Δφ also decreases. Since the thickness d of the liquid crystal layer is fixed, the phase difference Δφ can be continuously changed by continuously adjusting the applied voltage. Macroscopically, this manifests as the transmission peak wavelength of the filter shifting towards shorter wavelengths (blue shift) as the voltage increases, or shifting towards longer wavelengths (red shift) as the voltage decreases. By precisely controlling the voltage, any wavelength of visible light can be continuously selected for transmission, thereby achieving full-spectrum tuning from red to violet. The technical solution provided in this embodiment of the invention uses a liquid crystal spectrally tunable filter as the outward optical modulation module 40, which features fast response speed, continuous tuning of any color, and low power consumption.

[0047] Furthermore, the smart glasses also include a directional optical structure. This directional optical structure includes multiple microlenses, each corresponding to the light-emitting side (i.e., the side facing outward) of a micro-optical unit. The directional optical structure is used to confine the light emitted by the driven micro-optical unit within a preset angle range towards the observer B.

[0048] Specifically, on the light-emitting surface of each liquid crystal pixel unit, a corresponding microlens is fabricated using micro / nano fabrication processes such as photolithography, nanoimprinting, or micro-injection molding. The microlens can be convex, cylindrical, or aspherical lenses, with their optical axes aligned with the center of the micro-optical unit. Multiple microlenses are arranged at the same period as the micro-optical units, forming a microlens array. The microlenses can be made of transparent photocurable resin, glass, or silicon dioxide. Without a directional optical structure, the light emitted by each micro-optical unit scatters in all directions, causing most of the light to travel in directions other than the observation direction, resulting in energy waste and reduced brightness in the direction of observer B. The directional optical structure acts as a beam shaper. Each microlens collimates or converges the diverging light emitted by its corresponding micro-optical unit, confining the emitted light within a narrow angular range.

[0049] The technical solution provided by this invention, by setting a directional optical structure, can concentrate the light that was originally scattered in all directions to the direction where the observer B is located, which significantly increases the light flux entering the observer B's eyes, thereby making the contact lens effect brighter and more vivid under the same light source power, and improving the light energy utilization rate.

[0050] Furthermore, the smart glasses also include an auxiliary light source. The auxiliary light source is used to emit broadband illumination light (i.e., white light or near-white light covering the entire visible light spectrum) to the eye area of ​​the wearer A; the processing module 50 is also used to turn on the auxiliary light source when the ambient light intensity is lower than a preset threshold, and control the outward optical modulation module 40 to perform spectral modulation on the light emitted by the auxiliary light source so that the light propagating outward from the wearer A's eyes presents the target color.

[0051] Specifically, in dimly lit environments (such as indoors at night or in a movie theater), the ambient light intensity may be insufficient to produce bright enough reflected light, resulting in dim modulated light and an unobtrusive effect on the contact lenses. When the auxiliary light source is activated, it emits broadband white light that illuminates the iris of the wearer A. This white light, along with the existing weak ambient light, constitutes the incident illumination. The light reflected from the iris propagates outwards, passing through the activation area of ​​the outward optical modulation module 40. The processing module 50, based on a preset target color, controls the liquid crystal filter within the activation area to spectrally modulate the reflected light. In the modulated outgoing light, only the spectral component corresponding to the target color is retained, thus presenting a bright target color.

[0052] Based on the above embodiments, optionally, in another embodiment of the present invention, the outward optical modulation module 40 includes a digital micromirror device (DMD); each micro-optical unit includes a deflectable micro-mirror (i.e., micromirror), which can adjust the deflection angle based on the voltage applied by the processing module 50 to control the direction of the reflected light; The smart glasses also include a multi-color light source, which is set on the frame 10 and is used to provide light to be reflected to the digital micromirror device. The multi-color light source includes light-emitting units of at least two different colors.

[0053] The processing module 50 is also used to control the luminous intensity ratio of each color light-emitting unit in the multicolor light source according to the preset target color, so that the multicolor light source emits light to be reflected with the target color; and to control the micromirror device located in the activation area to be turned on, so that the light to be reflected is reflected to the outside, so that the observer sees the light propagating outward from the wearer A's eye as having the target color.

[0054] Specifically, a digital micromirror device (DMD) is an optical modulation chip manufactured based on microelectromechanical systems (MEMS) technology. It consists of a two-dimensional array of multiple micromirrors (micromirrors), each corresponding to a pixel. Each micromirror is mounted on a semiconductor substrate via a hinge structure and is independently controlled by an electrostatic drive electrode below, with each micromirror switching at microsecond levels. Under the influence of electrostatic force, each micromirror can rapidly deflect around its hinge axis between two stable angles (typically ±10° or ±12°). When the processing module 50 applies a voltage to the electrode of a micromirror, the micromirror deflects to a first angle (called the "on state"), reflecting the light to be reflected into a predetermined outgoing light path; when another voltage is applied or removed, the micromirror deflects to a second angle (called the "off state"), reflecting the light to be reflected in a direction deviating from the outgoing light path.

[0055] The multi-color light source can include red, green, and blue light-emitting units, packaged into a miniature RGB light source module. The light-emitting units can be LEDs, laser diodes, or quantum dot light sources to achieve a narrower spectral bandwidth and higher brightness. This light source module is positioned appropriately within the frame 10, such as inside the frame 11 near the hinge, at the front of the temple 12, or on the bridge of the nose. A miniature light guiding system can uniformly illuminate the entire effective area of ​​the DMD array with the light emitted from the multi-color light source. When the micromirrors are in the open state, the incident light (i.e., the light to be reflected) is reflected in the outgoing direction; when the micromirrors are in the closed state, the incident light (i.e., the light to be reflected) is reflected in a deviated direction and absorbed by light absorbers at the edge or inside of the lens 20, preventing it from entering the observer B's field of view.

[0056] The technical solution provided in this embodiment of the invention uses a digital micromirror device as an outward optical modulation module 40, combined with a multi-color light source active illumination scheme, to present a bright and vivid contact lens effect even in a completely dark environment, without relying on ambient light reflection or the need for an auxiliary light source in low light; secondly, the switching speed of the DMD micromirror can reach the microsecond level, which is much faster than the millisecond level response of liquid crystal, and can support faster eye-tracking dynamic compensation and high refresh rate pattern changes, providing synchronization between the contact lens pattern and eye movement.

[0057] Based on the above embodiments, Figure 4 This is a structural block diagram of a partial structure of another smart glasses provided in an embodiment of the present invention, for reference. Figure 4 Optionally, the smart glasses also include an interaction module 60. This interaction module 60 is mounted on the frame 10 and receives input commands from the wearer A to set or switch target colors. The interaction module 60 includes at least one of a voice recognition module 61, a touch sensor, and a wireless communication module for communicating with external terminal devices. Through the interaction module 60, the wearer A can conveniently select desired iris colors, patterns, and even dynamic effects without removing the glasses or resorting to other complex operations.

[0058] The following is combined with Figure 3 The working process of this embodiment is illustrated by a specific scenario: Suppose wearer A wants others to see their pupils as "lake blue". Wearer A inputs the target color via voice command ("lake blue"). The smart glasses' voice recognition module 61 (e.g., microphone) receives the command and transmits it to the processing module 50. The eye-tracking module 30 captures wearer A's eye images in real time at a rate of 30 frames per second or higher and transmits the image data to the processing module 50. The processing module 50 extracts the pupil center coordinates, calculates the projection position of the pupil on the lens 20 plane, and uses this as the center to determine the activation area (i.e., the corresponding iris area) based on the preset average iris radius. Simultaneously, the processing module 50 deconstructs "lake blue" into the corresponding target spectral distribution (e.g., a narrowband spectrum with a peak wavelength of around 480nm) and generates a driving signal. When the outward optical modulation module 40 is a liquid crystal spectral tunable filter array, the processing module 50 applies a corresponding voltage to each liquid crystal pixel unit located in the activation area, causing the transmission peak wavelength of these pixel units to concentrate around 480nm.

[0059] At this time, ambient light (such as natural light) as incident light L1 shines on the iris of wearer A. Some of the light is reflected by the iris. When this reflected light passes through lens 20, it must pass through the activation area of ​​the outward optical modulation module 40. Since the liquid crystal pixel units in the activation area only allow blue light around 480nm to pass through, while absorbing or reflecting light of other wavelengths, only the lake blue component is retained in the light propagating outward from the front of the glasses. The reflected light L2 received by observer B (the person standing directly in front of wearer A) is precisely the spectrally modulated lake blue light, thus visually perceiving wearer A's pupil as lake blue. When wearer A moves their eyes, the eye-tracking module 30 updates the pupil position in real time, and the processing module 50 adjusts the coordinates of the activation area accordingly, so that the activation area always follows the current position of the iris, thereby ensuring that the effect of the contact lenses remains consistent under different viewing directions.

[0060] This invention achieves selective outward modulation. The system accurately distinguishes between two light paths: "entering the eye" and "emitting from the eye." It only intervenes in the latter through programming, ensuring that the wearer A's own vision is not disturbed, while changing the appearance externally. Through software-defined colors, it achieves real-time dynamic pupil color rendering with infinite possibilities, from static monochrome to dynamic gradient colors and breathing light effects. Without touching the eyeball at all, it performs physical-level, real-time modification of the iris, a key biometric feature, which is a non-invasive biometric modification. Compared to existing technologies, the advantages of this invention include: health and safety, completely avoiding all eye health risks and foreign body sensation associated with contact lenses; extreme convenience and flexibility, enabling "one-click lens replacement," with infinitely adjustable colors and patterns, and support for quick switching of scene modes; realistic physical effects, directly acting on the real light path, effective under any naked-eye observation or optical lens, unlike digital filters; seamless user experience, not obstructing vision, not interfering with normal vision, and wearing comfort no different from ordinary glasses; and a platform-based functionality, with eye tracking and micro-optical control as the core, providing a hardware foundation for future integration of more eye-tracking interaction and visual enhancement functions.

[0061] Based on the above embodiments, Figure 5 This is a structural block diagram of a partial structure of another smart glasses provided in an embodiment of the present invention, for reference. Figure 5 Optionally, the smart glasses also include an ambient light sensor 70, which is mounted on the frame 10 and is used to detect the spectral distribution of ambient light in real time. The processing module 50 is also used to calculate the spectral compensation amount based on the target color and the spectral distribution of ambient light, and to control the micro-optical unit located in the activation area to emit compensation light based on the spectral compensation amount. The compensation light is superimposed on the ambient light so that the light propagating outward from the wearer A's eyes presents the target color.

[0062] Specifically, the outward optical modulation module 40 modulates the spectrum of light propagating outward from the wearer A's eye to produce the target color. However, the spectral distribution of ambient light is not constant. Under different light sources such as natural light, incandescent lamps, fluorescent lamps, and LED lamps, the relative intensities of red, green, and blue wavelengths in ambient light vary significantly. If the changes in ambient light are not considered, the mixed color that ultimately enters the observer B's eye may deviate from the preset target color, resulting in color shift. To achieve accuracy and consistency of the color of light entering the observer under different lighting conditions, this embodiment of the invention uses an ambient light sensor 70 to detect the spectral distribution of ambient light in real time, and a processing module 50 calculates the spectral compensation amount based on the target color and the spectral distribution of ambient light, controlling the miniature optical unit located in the activation area to emit compensation light.

[0063] An ambient light sensor 70 can be installed on the outward-facing surface of the frame 10 to accurately collect ambient light illuminating the wearer A's eye area. The processing module 50 converts the compensation amount into a control signal for the outward-facing optical modulation module 40. For spectral components requiring supplementation, it controls the micro-optical unit to increase the transmittance of the corresponding wavelength or actively emit light of the corresponding wavelength; for spectral components requiring cancellation, it reduces the transmittance of the corresponding wavelength or actively emits complementary color light for neutralization. Through this complementary color operation, the final synthesized spectrum of the outward-propagating light is the same as or similar to the target spectrum.

[0064] This invention also provides a method for achieving a colored contact lens effect in smart glasses, based on the smart glasses implementation described in any embodiment of this invention. Figure 6 This is a flowchart illustrating a method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention. (Refer to...) Figure 6 Methods for achieving the colored contact lens effect in smart glasses include: S110: The eye-tracking module acquires real-time images of the wearer's eyes.

[0065] Specifically, the eye-tracking module 30 may include an infrared light source and an infrared camera; the steps of acquiring real-time images of the wearer A's eyes through the eye-tracking module 30 include: emitting infrared light towards the wearer A's eyes through the infrared light source; and acquiring infrared images of the wearer A's eyes through the infrared camera. The acquired image data is transmitted to the processing module 50 in real time.

[0066] S120. The processing module determines the wearer's pupil position based on the eye image and determines the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane.

[0067] Specifically, after receiving the eye image, the processing module 50 executes an image processing algorithm to extract the pupil center coordinates. This algorithm includes filtering, binarization, edge detection, and ellipse fitting. Since the relative positional relationship between the eye-tracking module 30 and the lens 20 has been pre-calibrated, the processing module 50 can use geometric transformation to map the pupil center from the camera coordinate system to the lens 20 plane coordinate system, obtaining the position of the pupil's projection point on the lens 20 plane—that is, the pupil's projection position on the lens 20 plane. Then, the processing module 50 determines the activation area of ​​the outward optical modulation module 40 based on the pupil's projection position on the lens 20 plane.

[0068] S130. The processing module controls the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eyes according to the preset target color, so that the light propagating outward from the wearer's eyes presents the target color.

[0069] Specifically, the processing module 50 acquires a preset target color and, based on this target color, controls the micro-optical units located within the activation area to perform spectral modulation on the light propagating outward from the wearer A's eye. The outward optical modulation module 40 is a two-dimensional array composed of multiple micro-optical units, each with a fixed physical address. The processing module 50 maps the calculated activation area to the corresponding micro-optical unit in the array and sends a driving signal to these units, while units outside the activation area are not driven. This achieves precise and localized spectral modulation of the outward-propagating light, ensuring that the light propagating outward from the wearer A's eye exhibits the target color.

[0070] Figure 7 This is a flowchart of another method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention, see reference. Figure 7 Methods for achieving the colored contact lens effect in smart glasses include: S210: The wearer's eye images are acquired in real time through the eye-tracking module; the eye images include infrared images.

[0071] S220: The processing module identifies the pupil center and corneal reflection point in the infrared image, determines the wearer's pupil position based on the position of the pupil center relative to the corneal reflection point, and determines the wearer's gaze direction based on the relative position vector between the pupil center and the corneal reflection point.

[0072] Specifically, during the process of identifying the pupil center and corneal reflection point based on the infrared image, the processing module 50 first preprocesses the infrared image. This preprocessing includes operations such as filtering and denoising, histogram equalization, and binarization segmentation to enhance the contrast between the pupil region and the corneal reflection point. Then, through edge detection and ellipse fitting algorithms, it accurately identifies the pupil boundary and calculates the pupil center coordinates, while simultaneously determining the center coordinates of the corneal reflection point. After determining the pupil center coordinates and the corneal reflection point center coordinates, it calculates the position vector of the pupil center relative to the corneal reflection point—a two-dimensional vector pointing from the corneal reflection point to the pupil center. This vector reflects the deflection state of the eyeball in the current gaze direction. When the gaze direction changes, the pupil center shifts relative to the corneal reflection point, and the direction and length of this vector change systematically accordingly.

[0073] S230. The processing module determines the projection area of ​​the iris on the lens plane based on the projection position of the pupil on the lens plane and the preset geometric relationship between the pupil and the iris, and uses the projection area of ​​the iris on the lens plane as the activation area.

[0074] Specifically, since the lens 20 is located in front of the eyeball, and the relative positional relationship between the eye-tracking module 30 and the lens 20 has been pre-calibrated, the processing module 50 can project the center of the pupil in three-dimensional space onto the two-dimensional plane of the lens 20 through geometric transformation to obtain a projection point (the projection point of the pupil on the lens 20 along the line of sight). Then, according to the preset geometric relationship between the pupil and the iris, the processing module 50 expands outward from the pupil projection position according to the preset iris radius to generate a circular or elliptical projection area, which is then determined as the activation area of ​​the outward optical modulation module 40.

[0075] S240: The processing module 50 controls the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer A's eye according to the preset target color, so that the light propagating outward from the wearer A's eye presents the target color.

[0076] In this embodiment of the invention, by setting the activation area as the region on the outward optical modulation module 40 corresponding to the current iris position of the wearer A, and keeping the micro-optical units outside the activation area in an inactive state, the micro-optical unit corresponding to the pupil position remains inactive (i.e., transparent). Since light mainly enters the eye through the pupil when the wearer A observes the external environment, and the micro-optical unit corresponding to the pupil area is inactive and completely transparent, the light incident from the outside to the wearer A's pupil does not undergo any spectral modulation and can enter the wearer A's eye completely and truthfully. This further ensures that the wearer A can clearly observe the external environment through the lens 20, and normal vision is not affected in any way.

[0077] Based on the above embodiments, optionally, in steps S130 and S240, the step of controlling the micro-optical unit located in the activation region to spectrally modulate the light propagating outward from the wearer A's eye includes: When the outward optical modulation module 40 includes a liquid crystal spectrally tunable filter, the transmission spectrum of the liquid crystal pixel unit is adjusted by applying a voltage to the liquid crystal pixel unit located in the active region of the liquid crystal spectrally tunable filter; or, When the outward optical modulation module 40 includes a digital micromirror device, by controlling the ratio of the light emission intensity of each color light-emitting unit in the multicolor light source, the multicolor light source emits light of the target color to be reflected, and controls the micro mirror located in the activation area of ​​the digital micromirror device to be in the open state, so as to reflect the light to be reflected to the outside.

[0078] Figure 8 This is a flowchart of another method for achieving a colored contact lens effect in smart glasses according to an embodiment of the present invention, see reference. Figure 8 Methods for achieving the colored contact lens effect in smart glasses include: S310: The eye-tracking module acquires real-time images of the wearer's eyes.

[0079] S320: The processing module determines the wearer's pupil position based on the eye image, and determines the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane.

[0080] S330: Real-time detection of the spectral distribution of ambient light using an ambient light sensor.

[0081] S340: The processing module calculates the spectral compensation amount based on the preset target color of the iris and the spectral distribution of the ambient light, and controls the micro optical unit located in the activation area to emit compensation light based on the spectral compensation amount, so that the compensation light and the ambient light are superimposed to present the target color.

[0082] In this embodiment of the invention, the step of controlling the micro-optical unit located within the activation area to spectrally modulate the light propagating outward from the wearer A's eye according to a preset target color by the processing module 50 includes: the processing module 50 calculating a spectral compensation amount based on the preset target color of the iris and the spectral distribution of ambient light, and controlling the micro-optical unit located within the activation area to emit compensation light according to the spectral compensation amount, so that the compensation light, when superimposed with the ambient light, presents the target color. This allows for automatic adaptation to different ambient light conditions (such as natural light, incandescent light, fluorescent light, etc.), real-time compensation for color shifts caused by ambient light, ensuring that the contact lens color accurately presents the preset target color in any environment, significantly improving the user experience.

[0083] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A type of smart glasses, characterized in that, include: Eyeglass frames; Lenses are mounted on the eyeglass frame; An eye-tracking module, mounted on the frame, is used to acquire real-time images of the wearer's eyes; An outward optical modulation module is disposed on the surface of the lens or integrated inside the lens. The outward optical modulation module includes a two-dimensional array composed of multiple micro optical units, each of which can be independently controlled to modulate the spectral characteristics of outwardly propagating light. The processing module is connected to the eye-tracking module and the outward optical modulation module, respectively. The processing module is used to determine the wearer's pupil position based on the eye image, and to determine the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane. The processing module is also used to control the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eye according to a preset target color, so that the light propagating outward from the wearer's eye presents the target color.

2. The smart glasses according to claim 1, characterized in that, The eye-tracking module includes an infrared light source and an infrared camera; the infrared light source is used to emit infrared light towards the wearer's eyes; the infrared camera is used to capture infrared images of the wearer's eyes; The processing module is also used to identify the pupil center and corneal reflection point based on the infrared image, determine the position of the pupil based on the position of the pupil center relative to the corneal reflection point, and determine the wearer's gaze direction based on the relative position vector of the pupil center and the corneal reflection point.

3. The smart glasses according to claim 2, characterized in that, The outward optical modulation module includes a liquid crystal spectrally tunable filter; Each of the aforementioned micro-optical units is a liquid crystal pixel unit in the liquid crystal spectral tunable filter, and the liquid crystal pixel unit can independently adjust the transmission spectrum of outwardly propagating light based on the voltage applied by the processing module.

4. The smart glasses according to claim 3, characterized in that, The smart glasses also include: A directional optical structure includes multiple microlenses, each of which is disposed on the light-emitting side of a micro-optical unit; the directional optical structure is used to constrain the light emitted by the driven micro-optical unit to be emitted within a preset angle range toward the observer.

5. The smart glasses according to claim 3, characterized in that, The smart glasses also include: An auxiliary light source is used to emit broadband illumination light towards the wearer's eye area; the processing module is also used to turn on the auxiliary light source when the ambient light intensity is lower than a preset threshold, and control the outward optical modulation module to perform spectral modulation on the light emitted by the auxiliary light source so that the light propagating outward from the wearer's eyes presents the target color.

6. The smart glasses according to claim 2, characterized in that, The outward optical modulation module includes a digital micromirror device; Each of the micro-optical units includes a deflectable micro-mirror that can adjust its deflection angle based on the voltage applied by the processing module to control the direction of the reflected light. The smart glasses also include: A multicolor light source, disposed on the frame, is used to provide light to be reflected to the digital micromirror device. The multicolor light source includes light-emitting units of at least two different colors. The processing module is also used to control the luminous intensity ratio of each color emitting unit in the multicolor light source according to the preset target color, so that the multicolor light source emits light to be reflected with the target color; And control the micromirror device located in the activation area to be in the on state, so as to reflect the light to be reflected to the outside world, so that the light propagating outward from the wearer's eyes presents the target color.

7. The smart glasses according to claim 1, characterized in that, Also includes: An ambient light sensor is mounted on the frame of the glasses and is used to detect the spectral distribution of ambient light in real time. The processing module is further configured to calculate a spectral compensation amount based on the target color and the spectral distribution of the ambient light, and control the micro-optical unit located in the activation area to emit compensation light based on the spectral compensation amount; wherein, after the compensation light is superimposed on the ambient light, the light propagating outward from the wearer's eyes presents the target color.

8. The smart glasses according to claim 1, characterized in that, Also includes: An interactive module, located on the frame, is used to receive input commands from the wearer to set or switch the target color; The interaction module includes at least one of a voice recognition module, a touch sensor, and a wireless communication module for communicating with external terminal devices.

9. The smart glasses according to claim 1, characterized in that, The activation area is the region on the outward optical modulation module that corresponds to the wearer's current iris position; The processing module is further configured to determine the projection area of ​​the iris on the lens plane based on the projection position of the pupil on the lens plane and in combination with the preset geometric relationship between the pupil and the iris, and to use the projection area of ​​the iris on the lens plane as the activation area.

10. A method for achieving a colored contact lens effect in smart glasses, characterized in that, Based on the smart glasses according to any one of claims 1 to 9, including: The eye-tracking module acquires real-time images of the wearer's eyes. The processing module determines the wearer's pupil position based on the eye image and determines the activation area of ​​the outward optical modulation module based on the projection position of the pupil on the lens plane. The processing module controls the micro-optical unit located in the activation area to perform spectral modulation on the light propagating outward from the wearer's eyes according to the preset target color, so that the light propagating outward from the wearer's eyes presents the target color.

11. The method for achieving the colored contact lens effect in smart glasses according to claim 10, characterized in that, The control of the micro-optical unit located within the activation region to spectrally modulate light propagating outward from the wearer's eye includes: When the outward optical modulation module includes a liquid crystal spectrally tunable filter, the transmission spectrum of the liquid crystal pixel unit is adjusted by applying a voltage to the liquid crystal pixel unit located in the active region of the liquid crystal spectrally tunable filter; or, When the outward optical modulation module includes a digital micromirror device, by controlling the luminous intensity ratio of each color light-emitting unit in the multicolor light source, the multicolor light source emits light of the target color to be reflected, and the micro mirror located in the activation area of ​​the digital micromirror device is controlled to be in the open state, so as to reflect the light to be reflected to the outside.

12. The method for achieving the colored contact lens effect in smart glasses according to claim 10, characterized in that, The smart glasses also include an ambient light sensor; the method for achieving the contact lens effect in the smart glasses further includes: The ambient light sensor detects the spectral distribution of ambient light in real time. The processing module calculates the spectral compensation amount based on the target color and the spectral distribution of the ambient light, and controls the micro-optical unit located in the activation area to emit compensation light based on the spectral compensation amount, so that the compensation light and the ambient light are superimposed to present the target color.

Images