An intelligent zoom glasses based on a visual feedback mechanism

Abstract

The present invention relates to the technical field of zoom glasses, and discloses an intelligent zoom glasses based on a visual feedback mechanism, which includes a glasses frame, lenses, and electronic components including a light sensor, an eye movement tracking sensor, a control unit, and a power supply module; compared with traditional single-focus glasses, it can cope with complex eye-using scenarios. For example, when switching between rooms with different lighting conditions, it can automatically adjust the focal length, relieve eye fatigue, and ensure clear vision; compared with existing glasses products, it deeply integrates eye movement tracking and light sensing technologies, synergistically plays their advantages, and precisely serves vision correction and optimization; moreover, it overcomes the drawbacks of inaccurate adjustment and slow response of most zoom glasses, and precisely adjusts the focus based on the comprehensive light and the focusing direction of the eyeball; it also has protection mechanisms and adaptive strategies for strong light and weak light, comprehensively ensuring the visual comfort of users and meeting diverse eye-using needs.

Description

Technical Field

[0001] The present invention relates to the technical field of zoom glasses, and particularly to an intelligent zoom glasses based on a visual feedback mechanism. Background Art

[0002] Traditional glasses usually only have a single fixed focal length, which is difficult to meet people's visual needs in various dynamic eye - using situations. For example, when people suddenly enter a dimly - lit room from a bright indoor environment to read a book, fixed - focal - length glasses cannot automatically adjust the focal length to adapt to the visual differences brought by the light change, easily causing eye fatigue and unclear vision.

[0003] With the continuous progress of technology, visual - assistance technologies have become a research hotspot. Eye - tracking technology has been widely used in fields such as virtual reality and augmented reality to accurately capture the visual focus points of users and improve the interaction experience. Light - sensing technology has also been applied to many intelligent devices to achieve intelligent monitoring and regulation of ambient light. However, existing glasses products rarely deeply integrate these two key technologies and fail to fully utilize their synergistic advantages to serve daily vision correction and optimization.

[0004] In addition, although there are some glasses with zoom functions on the market, most of them have problems such as inaccurate adjustment and slow response speed. Some zoom glasses only adjust the focal length according to simple light - intensity changes, ignoring the matching relationship between the focusing direction of the eyeball itself and the light direction, resulting in poor actual visual effects. Moreover, when facing extreme lighting conditions such as strong light and weak light, such glasses lack effective protection mechanisms and adaptive strategies, not only unable to ensure the visual comfort of users, but even possibly causing damage to the eyes.

[0005] In summary, to solve the many deficiencies of traditional glasses and existing zoom glasses and meet people's growing complex eye - using needs, it is urgent to develop a new type of intelligent zoom glasses that can intelligently, quickly, and accurately adjust the focal length based on a precise visual feedback mechanism and adapt to various lighting environments. Summary of the Invention

[0006] The purpose of the present invention is to provide an intelligent zoom glasses based on a visual feedback mechanism, which solves the technical problems proposed in the background art.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An intelligent zoom glasses based on a visual feedback mechanism, comprising: a glasses frame, lenses, and electronic components including a light sensor, an eye - tracking sensor, a control unit, and a power module;

[0009] Among them, the glasses frame is used to support the lenses and the built - in electronic components;

[0010] The lens is made of an optical zoom material that changes its own focal length through an external control signal. Among them, the optical zoom material uses a liquid crystal material;

[0011] Light sensors are installed on both sides of the glasses frame. The light sensors are used to detect the light intensity and light direction entering the eyes, and obtain the light intensity parameter and the light direction vector; then mark the light intensity parameter as L, and mark the light direction vector as V = (v x ,v y ,v z );

[0012] The eye movement tracking sensor is installed inside the glasses frame. The eye movement tracking sensor is used to track the rotation and focusing direction of the eyeball, and obtain the eyeball rotation angle and the focusing direction vector; then mark the eyeball rotation angle as G, and mark the focusing direction vector as U = (u x ,u y ,u z );

[0013] The control unit is embedded inside the glasses frame. The control unit is used to receive the data measured by the light sensor and the eye movement tracking sensor, and then perform focal length adjustment control based on this data;

[0014] The power module is embedded inside the glasses frame. The power module is used to provide power for the light sensor, the eye movement tracking sensor, and the control unit.

[0015] As a further solution of the present invention: Among them, the light sensor internally includes a microlens array and a detector array. The method for obtaining the light direction vector is as follows:

[0016] The microlens array focuses the light incident at different angles to different positions of the detector array. When the light is incident, the detectors at different positions will generate corresponding electrical signals according to the received light intensity;

[0017] Then, by analyzing the responses of these detectors, the light intensity distribution of the light on the detector array can be determined;

[0018] Then, according to information such as the centroid position of the light intensity distribution, combined with the geometric parameters and optical structure of the detector array, calculate the projection vector of the light direction on the plane of the detector array;

[0019] Then, through methods such as triangulation using light sensors at multiple different positions, the light direction vector in three-dimensional space is further obtained.

[0020] As a further solution of the present invention: The method for obtaining the focusing direction vector is as follows:

[0021] The eye movement tracking sensor uses the principle of infrared light reflection to monitor the movement of the eyeball;

[0022] First, the eye movement tracking sensor determines the rotation angle of the eyeball by emitting infrared light and detecting the position change of the reflected light on the surface of the eyeball;

[0023] Then, combining the physiological optical model of the eyeball and the known eyeball structure parameters, the rotation angle of the eyeball is converted into a focusing direction vector; specifically, according to the optical center position of the eyeball, the curvatures of the cornea and the lens, and the rotation angle of the eyeball, the vector of the focusing direction in three-dimensional space is calculated through the principle of geometric optics;

[0024] As a further solution of the present invention: the focal length adjustment control method is as follows:

[0025] StepK1, calculate the deviation between the light direction vector and the eyeball focusing direction vector;

[0026] The calculation formula is: ;

[0027] The specific calculation process is as follows:

[0028] First, perform vector subtraction on V and U and obtain a new vector W = V - U;

[0029] Then, extract the corresponding components of vector V and vector U (v x , v y , v z ) and (u x , u y , u z );

[0030] Subsequently, through: ;

[0031] Calculate the modulus of W;

[0032] Then, through: ;

[0033] Obtain the deviation D between the light direction vector and the eyeball focusing direction vector;

[0034] StepK2, determine whether to adjust the lens focal length according to the deviation D and the light intensity L;

[0035] Compare the deviation D and the light intensity L with their corresponding preset deviation threshold Dy and preset intensity threshold interval [Lmin, Lmax] respectively:

[0036] Among them, Lmin is the lower limit of the intensity threshold, and Lmax is the upper limit of the intensity threshold;

[0037] If D ≥ Dy and L ∈ [Lmin, Lmax], it is determined that the user's visual focus does not match the external light direction, and the lens focal length needs to be adjusted, and a lens focal length adjustment signal is generated;

[0038] StepK3. When the lens focal length adjustment signal is generated, an electrical signal is sent to the lens to adjust the lens focal length;

[0039] The method is as follows:

[0040] StepK3.1. Extract the initial focal length of the lens and mark it as J0;

[0041] StepK3.2. Through: ;

[0042] Calculate the electrical signal strength E;

[0043] In the formula, β is a preset proportional coefficient, which is obtained by pre-testing the optical properties of the lens material and the overall performance of the glasses;

[0044] StepK3.3. Through: ;

[0045] Calculate the adjustment amount of the lens focal length;

[0046] In the formula, γ is a focal length - electrical signal proportional coefficient preset by the optical properties of the lens material;

[0047] StepK3.4. Through: ;

[0048] Calculate the adjusted lens focal length J1;

[0049] Subsequently, the control unit controls the lens focal length adjustment mechanism of the lens to adjust the lens focal length according to the adjusted lens focal length J1;

[0050] As a further solution of the present invention: A lens focal length adjustment mechanism corresponding to the lens is further provided on the spectacle frame, and the focal length adjustment mechanism is connected to the control unit, and responds to the electrical signal sent by the control unit to adjust the lens focal length;

[0051] Among them, the power supply module provides power for the focal length adjustment mechanism.

[0052] As a further solution of the present invention: Among them, the power supply module uses a rechargeable lithium battery.

[0053] As a further solution of the present invention: If D < Dy and L ∈ [Lmin, Lmax], it is determined that the user's visual focus matches the external light direction. At this time, the lens focal length does not need to be adjusted, and no lens focal length adjustment signal is generated.

[0054] As a further solution of the present invention: when L > Lmax, the function of adjusting the focal length according to D is temporarily stopped because under such strong light interference, it will cause harm to the eyes and may exceed the normal working range of the sensor and the lens.

[0055] As a further solution of the present invention: the spectacle frame is also equipped with an LED lamp, and the LED lamp is powered by a power module;

[0056] When L < Lmin, an illumination start signal is generated, and the illumination start signal is used to start the LED lamp to light up through the control unit. After the illumination is improved, it is determined whether to adjust the lens focal length according to D and the adjusted light intensity;

[0057] Among them, when the LED lamp is on, when L > 2×Lmin, the illumination start signal is converted into an illumination stop signal.

[0058] Advantages of the present invention:

[0059] Intelligently adapt to visual needs: By detecting the light intensity and direction through a light sensor, and tracking the eye movement and focusing direction through an eye movement tracking sensor, the control unit adjusts the focal length control based on this data, and can automatically adjust the lens focal length according to the matching situation between the user's actual visual focus and the external light direction, enabling the glasses to intelligently adapt to different visual scenarios and needs, and providing users with a clear and comfortable visual experience.

[0060] Precise focal length adjustment: It has a rigorous focal length adjustment control method. First, accurately calculate the deviation between the light direction vector and the eye focusing direction vector, and then combine the light intensity to determine whether to adjust the lens focal length. When it is determined that adjustment is needed, the electrical signal intensity, the lens focal length adjustment amount, and the adjusted lens focal length are obtained through a scientific and reasonable calculation formula, and then the lens focal length is accurately adjusted to ensure that the visual effect can conform to the user's current eye use state.

[0061] Applicability in multiple scenarios: Considering different light intensity scenarios, intensity threshold intervals and coping strategies in different situations such as strong light and weak light are set. For example, under strong light interference, the function of adjusting the focal length according to the deviation is temporarily stopped to avoid strong light causing harm to the eyes and exceeding the normal working range of the sensor and the lens; in weak light, an illumination start signal can be generated to start the LED lamp to light up to improve the illumination, and then it is determined whether to adjust the lens focal length according to the situation, ensuring that the glasses can function properly in a variety of light environments and improving the applicability.

[0062] Reasonable and reliable structure: The glasses frame not only supports the lenses and built-in electronic components, but also is equipped with a focal length adjustment mechanism connected to the control unit, which can adjust the focal length of the lenses in response to the electrical signals sent by the control unit. All components cooperate with each other and the structure is reasonable. At the same time, the power module uses a rechargeable lithium battery to provide stable and reliable power support for the light sensor, eye movement tracking sensor, control unit, focal length adjustment mechanism, LED lights, etc., ensuring the stable operation of the overall glasses. Description of the Drawings

[0063] The present invention will be further described below in conjunction with the drawings.

[0064] Figure 1 It is a system block diagram of an intelligent zoom glasses based on a visual feedback mechanism of the present invention.

[0065] Figure 2 It is a schematic diagram of the focal length adjustment control process of the control unit in an intelligent zoom glasses based on a visual feedback mechanism of the present invention. Specific Embodiments

[0066] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0067] Embodiment 1

[0068] Please refer to Figure 1 and Figure 2 As shown, the present invention is an intelligent zoom glasses based on a visual feedback mechanism, which is composed of a glasses frame, lenses and electronic components;

[0069] In this embodiment: The glasses frame is used to support the lenses and the built-in electronic components. The frame material can be made of lightweight and strong metal or plastic to ensure the comfort and durability of wearing; The lenses are made of optical zoom materials, and this material can change its own focal length under the action of an external control signal;

[0070] Among them, the optical zoom material uses liquid crystal material. Liquid crystal molecules have anisotropic optical properties. Without an external electric field, liquid crystal molecules exhibit a specific arrangement. When an electric field is applied, the orientation of liquid crystal molecules changes; this change in orientation causes a change in the refractive index of light passing through the liquid crystal layer, thereby achieving the adjustment of the focal length; for example, in a liquid crystal zoom lens, by applying electric fields with different voltages on both sides of the liquid crystal layer, the tilt angle of liquid crystal molecules can be controlled; according to liquid crystal optical theory, the change in refractive index is related to the tilt angle of liquid crystal molecules, and thus the focal length of the lens can be changed;

[0071] The electronic component includes a light sensor, an eye movement tracking sensor, a control unit, and a power supply module;

[0072] In this embodiment, the model of the light sensor is any one of BH1750 and TSL2561. BH1750 uses the I2C bus communication protocol and is convenient to connect with the microcontroller; it supports a wide illumination range from 0 to 65535 lux, can be configured with different resolutions and sampling rates to adapt to various application scenarios, and has a low-power mode, suitable for battery-powered applications, and is widely used in fields such as security systems, smart homes, and in-vehicle electronic products; TSL2561: is a high-speed, low-power, wide-range digital light intensity sensor that can directly convert the light intensity into a digital signal output, has multiple measurement modes and programmable functions, and can communicate with the microcontroller through the I2C bus, and is commonly used in applications such as ambient light detection and automatic brightness adjustment

[0073] The model of the eye movement tracking sensor is any one of OVM7251 and OG0TCBSI. And OVM7251 is an image sensor based on the 3-micron OmniPixel3-GS global shutter architecture launched by OmniVision, providing a camera module with a 640×480 VGA resolution, having the characteristics of small size, low power consumption, and high cost performance, and is suitable for applications such as AR / VR eye movement tracking and face recognition; OG0TCBSI is the latest 2.2-micron global shutter image sensor released by OmniVision, specifically used for eye movement tracking and face tracking in AR / VR / MR consumer-grade headsets and glasses, with a power consumption reduced by more than 40% compared to the previous generation, a package size of only 1.64mmx1.64mm, using PureCelPlus-S stacked chip technology and DCG high dynamic range technology, and providing a 400x400 resolution;

[0074] The light sensors are installed on both sides of the glasses frame. The light sensors are used to detect the light intensity and light direction entering the eyes, and obtain the light intensity parameter and the light direction vector; then mark the light intensity parameter as L, and mark the light direction vector as V = (v x , v y, v z );

[0075] Among them, the light sensor is a prior art, so it will not be elaborated here;

[0076] Among them, the light sensor internally includes a microlens array and a detector array. The method for obtaining the light direction vector is as follows:

[0077] The microlens array focuses the light incident at different angles to different positions of the detector array. When the light is incident, the detectors at different positions will generate corresponding electrical signals according to the received light intensity;

[0078] Subsequently, by analyzing the responses of these detectors, the light intensity distribution of the light on the detector array can be determined;

[0079] Then, according to information such as the centroid position of the light intensity distribution, combined with the geometric parameters and optical structure of the detector array, the projection vector of the light direction on the plane of the detector array is calculated;

[0080] Furthermore, through methods such as triangulation using light sensors at multiple different positions, the light direction vector in three-dimensional space is further obtained;

[0081] The eye movement tracking sensor is installed inside the glasses frame and at a position close to the eyes. The eye movement tracking sensor is used to track the rotation and focusing direction of the eyeball, and obtain the eyeball rotation angle and the focusing direction vector; Subsequently, the eyeball rotation angle is marked as G, and the focusing direction vector is marked as U = (u x , u y , u z );

[0082] The method for obtaining the focusing direction vector is as follows:

[0083] The eye movement tracking sensor uses the infrared light reflection principle to monitor the movement of the eyeball;

[0084] First, the eye movement tracking sensor determines the rotation angle of the eyeball by emitting infrared light and detecting the position change of the reflected light on the eyeball surface;

[0085] Then, in combination with the physiological optical model of the eyeball and the known eyeball structure parameters, the rotation angle of the eyeball is converted into a focusing direction vector; for example, according to the optical center position of the eyeball, the curvature of the cornea and lens, etc., and the rotation angle of the eyeball, the vector of the focusing direction in three-dimensional space is calculated through geometric optical principles;

[0086] In this embodiment, the methods for obtaining the light direction vector and the focusing direction vector are both supported by prior art, so they will not be elaborated here;

[0087] The control unit is embedded inside the glasses frame. The control unit is used to receive data measured by the light sensor and the eye movement tracking sensor, and then perform focal length adjustment control based on this data;

[0088] The focal length adjustment control method is as follows:

[0089] StepK1. Calculate the deviation between the light direction vector and the eyeball focusing direction vector;

[0090] Its calculation formula is: ;

[0091] The specific calculation process is as follows:

[0092] First, perform vector subtraction on V and U to obtain a new vector W = V - U;

[0093] Then, extract the corresponding components of vector V and vector U respectively (v x , v y , v z ) and (u x , u y , u z );

[0094] Then, through: ;

[0095] Calculate the modulus of W;

[0096] Next, through: ;

[0097] Obtain the deviation D between the light direction vector and the eyeball focusing direction vector;

[0098] StepK2. Determine whether to adjust the lens focal length according to the deviation D and the light intensity L;

[0099] Compare the deviation D and the light intensity L with their corresponding preset deviation threshold Dy and preset intensity threshold interval [Lmin, Lmax] respectively:

[0100] Among them, Lmin is the lower limit of the intensity threshold, and Lmax is the upper limit of the intensity threshold;

[0101] If D ≥ Dy and L ∈ [Lmin, Lmax], it is determined that the user's visual focus does not match the external light direction, and the lens focal length needs to be adjusted, and a lens focal length adjustment signal is generated;

[0102] If D < Dy and L ∈ [Lmin, Lmax], it is determined that the user's visual focus is relatively matched with the external light direction. At this time, the lens focal length does not need to be adjusted, and no lens focal length adjustment signal is generated;

[0103] StepK3. When the lens focal length adjustment signal is generated, an electrical signal is sent to the lens to adjust the lens focal length;

[0104] The method is as follows:

[0105] StepK3.1. Extract the initial focal length of the lens and mark it as J0;

[0106] StepK3.2. Through: ;

[0107] Calculate the electrical signal intensity E;

[0108] In the formula, β is a preset proportionality coefficient, which is obtained by pre-testing the optical properties of the lens material and the overall performance of the glasses;

[0109] In this embodiment, D is in degrees, and the unit of β is volts per degree;

[0110] StepK3.3. Through: ;

[0111] Calculate the adjustment amount of the lens focal length;

[0112] In the formula, γ is a focal length - electrical signal proportionality coefficient preset by the optical properties of the lens material;

[0113] StepK3.4. Through: ;

[0114] Calculate the adjusted lens focal length J1;

[0115] Subsequently, the control unit controls the focal length adjustment mechanism of the lens to adjust the focal length of the lens according to the adjusted lens focal length J1;

[0116] In this embodiment, a focal length adjustment mechanism corresponding to the lens is also provided. The focal length adjustment mechanism is connected to the control unit and responds to the electrical signal sent by the control unit to accurately adjust the lens focal length to meet the needs of users in different visual scenarios; among them, the focal length adjustment mechanism of the lens uses the electro-optic birefringence characteristic of liquid crystal material to adjust the focal length. Specifically, by applying electric fields of different intensities, the orientation of liquid crystal molecules is changed, and then the refractive index of the liquid crystal layer is changed, so as to control the refraction of light passing through the liquid crystal lens and achieve the purpose of adjusting the focal length;

[0117] The power module is embedded inside the glasses frame and is used to provide power for the light sensor, eye movement tracking sensor, control unit and the focal length adjustment mechanism of the lens;

[0118] In this embodiment, the power module uses a rechargeable lithium battery.

[0119] In this embodiment, a lightweight and sturdy metal or plastic is selected as the frame material, which ensures wearing comfort while having good durability, contributing to long-term use without imposing excessive burden on the wearer. A liquid crystal material is used as the optical zoom material. Utilizing the anisotropic optical properties of liquid crystal molecules, the molecular orientation is changed by applying an external electric field, thereby changing the refractive index of light to achieve focal length adjustment. This method enables the lens to flexibly respond to external control signals, realizing variable adjustment of the focal length to adapt to different visual needs. Models BH1750 or TSL2561 are selected. BH1750 supports a wide range of illuminance, can be configured with different resolutions and sampling rates, and also has a low-power mode, being suitable for various application scenarios and facilitating connection with a microcontroller. TSL2561 can directly convert the light intensity into a digital signal output, has multiple measurement modes and programmable functions, facilitating accurate detection of the light intensity and direction entering the eyes, providing a reliable basis for subsequent focal length adjustment. Models OVM7251 or OG0TCBSI are adopted. OVM7251 features small size, low power consumption, and high cost performance, being suitable for applications such as eye movement tracking. OG0TCBSI has lower power consumption, smaller package size, and adopts advanced technology, being able to accurately track the rotation and focusing direction of the eyeball, providing strong support for accurately judging the user's visual focus. It has a rigorous focal length adjustment control process. First, the deviation between the light direction vector and the eyeball focusing direction vector is accurately calculated, and then whether to adjust the lens focal length is judged in combination with the light intensity. When adjustment is required, the electric signal intensity, the lens focal length adjustment amount, and the adjusted lens focal length are successively obtained through reasonable calculation formulas. Finally, with the help of the lens focal length adjustment mechanism, precise adjustment of the lens focal length can be achieved, effectively matching the user's visual focus requirements in different visual scenarios and providing the user with a clear and comfortable visual experience. A rechargeable lithium battery is used as the power module, which can stably supply power to each electronic component, ensuring the normal operation of the overall glasses. Moreover, the lithium battery has the advantages of being rechargeable and reusable, and having a relatively high energy density, being convenient for the user to use and conducive to the continuous use of the glasses.

[0120] Embodiment 2

[0121] As Embodiment 2 of the present invention, when this application is specifically implemented, compared with Embodiment 1, the technical solution of this embodiment is only different from that of Embodiment 1 in that: in this embodiment, a small LED lamp is also mounted on the glasses frame, and the LED lamp is powered by the power module.

[0122] When L > Lmax, the function of adjusting the focal length according to D is temporarily stopped because under such strong light interference, it will cause harm to the eyes and may exceed the normal working range of the sensor and the lens.

[0123] When L < Lmin, an illumination start signal is generated. The illumination start signal is used to start the LED light to turn on through the control unit. After the illumination is improved, it is then determined whether the lens focal length needs to be adjusted according to D and the adjusted light intensity;

[0124] Among them, when L > 2 × Lmin, the illumination start signal is converted into an illumination off signal;

[0125] In this embodiment, based on Embodiment 1, the spectacle frame is equipped with a small LED light and powered by a power module, enabling it to have a light compensation function. In strong light, it can promptly stop the function of adjusting the focal length according to the deviation, avoiding damage to the eyes caused by strong light and preventing exceeding the normal working range of the sensor and the lens; in weak light, it can generate an illumination start signal to start the LED light to turn on to improve the illumination environment. After the illumination is improved, it is then determined whether the lens focal length needs to be adjusted according to the corresponding situation. At the same time, it is set that when the light intensity reaches a certain level, the illumination start signal is converted into an illumination off signal. Such a design enhances the adaptability of the glasses to different light environments, further improving the convenience of user use and the stability of the visual experience.

[0126] Embodiment 3

[0127] As Embodiment 3 of the present invention, when this application is specifically implemented, compared with Embodiment 1 and Embodiment 2, the technical solution of this embodiment lies in combining the solutions of the above-mentioned Embodiment 1 and Embodiment 2 for implementation.

[0128] This embodiment combines the solutions of Embodiment 1 and Embodiment 2 for implementation, integrating the advantages of both. It not only has the function of providing precise visual focal length adjustment for users through a reasonable structure, sensor selection, and precise focal length adjustment control mechanism in Embodiment 1, but also has the advantages of using an LED light for light compensation and corresponding function control in Embodiment 2 for different light intensity environments. This enables the intelligent zoom glasses to achieve good effects in many aspects such as materials, functions, and environmental adaptability, better meeting the visual needs of users in complex and diverse actual use scenarios and providing more high-quality and comprehensive visual services.

[0129] The above formulas are all dimensionless and take their numerical values for calculation. The formulas are obtained by collecting a large amount of data and performing software simulation to obtain a formula that is closest to the actual situation. The preset parameters and threshold selection in the formulas are set by those skilled in the art according to the actual situation.

[0130] The above is only the specific implementation manner of this application, but the protection scope of this application is not limited thereto. Any person skilled in the art within the technical scope disclosed by this application can easily think of changes or substitutions, which should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

1. An intelligent zoom glasses based on a visual feedback mechanism, characterized in that, Comprising: A spectacle frame, lenses, and electronic components including a light sensor, an eye movement tracking sensor, a control unit, and a power module; The spectacle frame is used to support the lenses and the built-in electronic components; The lenses are made of an optical zoom material that changes its own focal length through an external control signal; The light sensors are installed on both sides of the glasses frame. The light sensors are used to detect the light intensity and light direction entering the eyes, and obtain the light intensity parameter and the light direction vector. Subsequently, the light intensity parameter is marked as L, and the light direction vector is marked as V = (v x , v y , v z ); The eye movement tracking sensor is installed inside the glasses frame. The eye movement tracking sensor is used to track the rotation and focusing direction of the eyeball, and obtain the eyeball rotation angle and the focusing direction vector. Subsequently, the eyeball rotation angle is marked as G, and the focusing direction vector is marked as U = (u x , u y , u z ); The control unit is embedded inside the spectacle frame. The control unit is used to receive the data measured by the light sensor and the eye movement tracking sensor, and then perform focal length adjustment control based on this data; The power module is embedded inside the spectacle frame. The power module is used to supply power to the light sensor, the eye movement tracking sensor, and the control unit; The focal length adjustment control method is as follows: StepK1: Calculate the deviation between the light direction vector and the eye fixation direction vector, and denote it as D; StepK2: Determine whether to adjust the lens focal length according to the deviation D and the light intensity L; Compare the deviation D and the light intensity L with their corresponding preset deviation threshold Dy and preset intensity threshold interval [Lmin, Lmax] respectively. According to the comparison results, judge whether to generate a lens focal length adjustment signal; Wherein, Lmin is the lower limit of the intensity threshold, and Lmax is the upper limit of the intensity threshold; StepK3: When the lens focal length adjustment signal is generated, send an electrical signal to the lens to adjust the lens focal length.

2. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, wherein The deviation calculation process in StepK1 is as follows: First, perform vector subtraction on V and U, and obtain a new vector W = V - U; Then, extract the corresponding components of vector V and vector U, namely (v x , v y , v z ) and (u x , u y , u z ); Followed by: ; Calculate the modulus of W; Then, through: ; Obtain the deviation D between the light direction vector and the eye fixation direction vector.

3. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, characterized in that In StepK3, the lens focal length adjustment method is as follows: StepK3.1: Extract the initial focal length of the lens and mark it as J0; Step K3.2, by: ; Calculate the electrical signal intensity E; Wherein, β is a preset proportional coefficient, which is obtained by pre-testing the optical properties of the lens material and the overall performance of the glasses; Step K3.3, by: ; Calculate the adjustment amount of the lens focal length; Wherein, γ is a focal length - electrical signal proportional coefficient preset by the optical properties of the lens material; Step K3.4, by: ; Calculate the adjusted lens focal length J1; Then the control unit controls the focal length adjustment mechanism of the lens to adjust the focal length of the lens according to the adjusted lens focal length J1.

4. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, characterized in that If D ≥ Dy and L ∈ [Lmin, Lmax], then generate a lens focal length adjustment signal; If D < Dy and L ∈ [Lmin, Lmax], then do not generate a lens focal length adjustment signal.

5. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, wherein The spectacle frame is also equipped with a focal length adjustment mechanism corresponding to the lens. The focal length adjustment mechanism is connected to the control unit and responds to the electrical signal sent by the control unit to adjust the lens focal length; Wherein, the power module supplies power to the focal length adjustment mechanism.

6. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, wherein When L > Lmax, then temporarily stop the function of adjusting the focal length according to D.

7. The intelligent zoom glasses based on a visual feedback mechanism according to claim 2, characterized in that, The spectacle frame is also equipped with an LED light, and the LED light is powered by the power module; When L < Lmin, then generate an illumination on signal, and the illumination on signal is used to start the LED light to turn on through the control unit.

8. An intelligent zoom glasses based on a visual feedback mechanism according to claim 7, characterized in that, Wherein, When the LED light is on, when L > 2 × Lmin, the illumination on signal is converted into an illumination off signal.

9. The intelligent zoom glasses based on a visual feedback mechanism according to claim 1, wherein, Wherein, The power module uses a rechargeable lithium battery.

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