Electronic myopia glasses

Abstract

The utility model discloses a kind of electronic myopia glasses in the technical field of intelligent wearable equipment, including diopter adjustable structure, diopter adjustable structure is configured as the diopter of the catadioptric optical display module projected image observed by user is changed, to meet the vision needs of different users, diopter adjustable structure can be realized by the adjusting mechanism of catadioptric optical display module body, or by the quick adjustment structure or means being set outside catadioptric optical display module;The utility model provides a variety of adjustment means from precision machinery to electronic zooming, to external quick replacement etc. by adjustable diopter structure, meet the use demand under different scenes, strong flexibility, adjust conveniently and quickly, a product can be adapted to the user of different vision conditions, without customization, greatly improve the universality and user experience of product.

Description

Technical Field

[0001] This utility model relates to the field of smart wearable device technology, specifically to an electronic myopia glasses. Background Technology

[0002] Myopia is a common vision problem, and the traditional correction method is to wear glasses with a fixed refractive power. However, with the development of technologies such as augmented reality (AR) and virtual reality (VR), smart glasses have emerged that merge virtual information with a view of the real world. For myopic users, using these smart glasses usually requires wearing additional glasses or using customized lenses, which increases the complexity and cost of the device and reduces its convenience and comfort.

[0003] Electronic myopia glasses are a type of smart glasses that can make precise adjustments to the user's current myopia level in a timely manner. The refractive power will not be overcorrected or undercorrected, allowing the user's eyes to be in the most relaxed working state, relieving visual fatigue, and effectively protecting the user's eye health.

[0004] In existing technologies, some solutions attempt to integrate diopter adjustment functionality into smart glasses, but most suffer from limitations such as limited adjustment range, low precision, complex structure, or slow response speed. For example, some solutions only offer a limited number of fixed diopter settings, failing to meet users' personalized and precise adjustment needs; others employ complex mechanical structures, resulting in bulky devices and reduced reliability. Therefore, there is an urgent need in the field for electronic myopia glasses that can achieve wide-range, high-precision, fast, and convenient diopter adjustment.

[0005] Based on this, the present invention designs an electronic myopia glasses to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an electronic myopia glasses to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An electronic myopia glasses comprising: an eyeglass frame, a camera module disposed on the eyeglass frame, a motherboard, and a catadioptric optical display module, wherein the catadioptric optical display module includes a microchip display screen and a catadioptric optical display lens group.

[0009] The electronic myopia glasses have an adjustable diopter structure, which is configured to change the diopter of the image projected by the user when viewing the image from the catadioptric optical display module, so as to meet the vision needs of different users.

[0010] The diopter-adjustable structure can be achieved by the adjustment mechanism of the catadioptric optical display module body, or by a quick adjustment structure or means located outside the catadioptric optical display module;

[0011] The camera module captures images of the real world and transmits them to the motherboard. The motherboard processes the image signals and then transmits them to the microchip display screen for display.

[0012] The microchip display projects the image onto the catadioptric optical display lens group, which amplifies the image by changing the light path and then projects the image into the user's eyes.

[0013] As a further aspect of this utility model: the diopter-adjustable structure achieves diopter adjustment by internally adjusting the relative positions between the catadioptric optical display lens groups.

[0014] As a further aspect of this utility model: the diopter-adjustable structure achieves diopter adjustment by internally adjusting the relative position between the catadioptric optical display lens group and the microchip display screen.

[0015] As a further aspect of this utility model: the diopter-adjustable structure achieves diopter adjustment by changing the curvature, refractive index, or other optical properties of the catadioptric optical display lens group.

[0016] As a further embodiment of this utility model: the diopter-adjustable structure includes a rotating lens barrel mechanism, which drives the catadioptric optical display lens group to move along the optical axis by rotating the threaded lens barrel to achieve diopter adjustment.

[0017] As a further embodiment of this utility model: the diopter-adjustable structure is a slide rail drive mechanism, which adjusts the position of the catadioptric optical display lens group by moving the slider along the linear guide rail to achieve diopter adjustment.

[0018] As a further aspect of this utility model: the diopter-adjustable structure includes an electric adjustment component, which includes a micro drive motor and a linkage mechanism, and can automatically drive the catadioptric optical display lens group to achieve diopter adjustment.

[0019] As a further embodiment of this invention: the diopter-adjustable structure includes a variable-focus liquid crystal lens or a liquid lens unit, and the diopter is adjusted by controlling an electrical signal to change the optical properties of the lens.

[0020] As a further embodiment of this utility model: the quick adjustment structure or means includes a detachable external lens, an additional optical lens, and an optical sheet or film that can be attached to the surface of a catadioptric optical display lens, for quickly changing the overall refractive power.

[0021] As a further embodiment of this utility model: the quick adjustment structure or means is connected to the eyeglass frame or the folding optical display module through a snap-on, magnetic, sliding, or adhesive structure to facilitate quick installation and replacement.

[0022] As a further aspect of this utility model: the diopter adjustment range is -8D to +4D, and the adjustment accuracy is better than 0.1D.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] 1. Personalized fit: With its adjustable diopter structure, a single product can be adapted to users with different vision conditions without customization, greatly improving the product's universality and user experience;

[0025] 2. Multiple adjustment methods: It offers a variety of adjustment methods, from precision mechanical to electronic zoom, and external quick-change, to meet the needs of different scenarios. It is highly flexible and convenient to adjust.

[0026] 3. High precision and wide range: Excellent adjustment range and precision ensure display clarity and visual comfort;

[0027] 4. High structural integration: It integrates vision correction and intelligent display functions into one, avoiding the trouble of users wearing multiple glasses, and the device is lighter and more beautiful. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the present invention (Example 1);

[0029] Figure 2 for Figure 1 A schematic diagram of a partial explosion.

[0030] The attached diagram lists the components represented by each number as follows:

[0031] 1. Eyeglass frame; 2. Camera module; 3. Motherboard; 4. Reflective optical display lens group; 5. Microchip display screen. Detailed Implementation

[0032] Please see Figure 1-2 This utility model provides a technical solution:

[0033] Example 1

[0034] An electronic myopia glasses, comprising an eyeglass frame 1, a camera module 2 disposed thereon on the eyeglass frame, a motherboard 3, and a folding optical display module, wherein the folding optical display module includes a microchip display screen 5 and a folding optical display lens group 4;

[0035] During operation, the camera module 2 is used to capture images of the external environment. The motherboard 3 displays the captured images on the microchip display screen 5. The displayed images are transmitted to the user's eyeballs through the catadioptric optical display lens group 4, so as to view the external environment in real time. The camera module 2 captures images of the real world and transmits them to the motherboard 3. The motherboard 3 processes the image signals and then transmits them to the microchip display screen 5 for display.

[0036] The microchip display screen 5 projects the image onto the catadioptric optical display lens group 4, where the light path is changed and magnified by the catadioptric optical display lens group 4, and then the light path is projected into the user's eyes;

[0037] The diopter-adjustable structure can be implemented by the adjustment mechanism of the catadioptric optical display module body. In this embodiment, the diopter-adjustable structure can be implemented by the adjustment mechanism of the catadioptric optical display module body, such as... Figure 2 As shown, the catadioptric optical display lens group 4 here adopts a rotating lens barrel mechanism. By rotating the threaded lens barrel, the catadioptric optical display lens group is moved along the optical axis to achieve diopter adjustment. The rotating lens barrel mechanism here is not limited to the one shown in the figure, but also includes other rotating adjustment structures. There are many existing technologies disclosed here, so they will not be described in detail.

[0038] This embodiment achieves the refractive correction requirement of electronic myopia glasses through a rapid adjustment method of rotation, which can meet the requirements of rapid adjustment and adaptation for different myopic individuals.

[0039] Example 2

[0040] Unlike Embodiment 1, the diopter-adjustable structure in this embodiment is used to adjust the relative distance between the entire catadioptric optical display lens group 4 and the microchip display screen 5.

[0041] In practice, the microchip display 5 is fixed to a platform that can move slightly. Because the catadioptric lens group 4 has a high degree of lens convergence, the adjustment distance is extremely precise, down to the nanometer / micrometer level. Specifically, the platform is driven by a piezoelectric ceramic actuator to achieve nanometer-level movement. When the user adjusts the diopter setting via buttons on the glasses or an app, the mainboard 3 applies a specific voltage to the piezoelectric ceramic actuator, causing it to expand and contract with nanometer-level precision, thereby moving the catadioptric lens group 4 back and forth along the optical axis. Changes in the working distance between the microchip display 5 and the catadioptric lens group 4 directly result in changes in the virtual image distance, equivalent to diopter adjustment. This method does not alter the structure of the lens group itself, which helps maintain stable optical performance.

[0042] Example 3

[0043] Unlike other embodiments, in this embodiment, the diopter-adjustable structure achieves adjustment by changing the curvature or refractive index of at least one optical element in the catadioptric optical display lens group 4.

[0044] One approach is to replace one of the standard lenses in the lens assembly with a liquid crystal lens. This lens consists of a sealed cavity, an optical fluid, and a flexible thin film. By adjusting the fluid pressure within the cavity using a micropump, the curvature of the thin film can be changed, thereby altering the lens's optical power.

[0045] Another approach is to use an electrochromic material to create a lens. When different voltages are applied, the molecular arrangement of the material changes, causing a slight alteration in its refractive index. Although the change is small each time, the cumulative effect can achieve effective refractive power adjustment. Both methods are non-mechanical adjustments, offering fast response and noise-free operation.

[0046] Example 4

[0047] This embodiment is a specific example of another mechanical adjustment structure. The diopter-adjustable structure is a slide rail drive mechanism. Because external displacement adjustment differs from the adjustment of multiple lens groups within the catadioptric optical display lens group 4, it does not have the strict limitations imposed by the refracting optical path. Therefore, the required adjustment torque is significantly reduced to the millimeter level, making this slide rail structure feasible.

[0048] There are many publicly available structural examples of this type of linear guide rail. For instance, in one example, the catadioptric optical display lens group 4 is fixed to the slider via a connecting block, and a high-precision linear guide rail is fixed to the module base. The slider and the guide rail are precisely matched, and the adjustment mechanism can be a fine-tuning screw: rotating the screw pushes the slider, causing it to move along the guide rail. Alternatively, it can be a gear-rack mechanism: a rack is integrated below the slider, and rotating a small gear drives the slider to move. This type of guide rail mechanism offers smooth movement and low frictional resistance, making it particularly suitable for scenarios requiring frequent or fine adjustments.

[0049] Furthermore, these linear guides can directly utilize electrically adjustable components for direct control. For example, this component might include a miniature stepper motor or voice coil motor as the drive source. The motor's output shaft is connected to a lead screw or cam via a reduction gearbox, forming a linkage mechanism. The mainboard 3 sends pulse signals based on user input (such as buttons, voice commands, or APP control) to control the motor to rotate at specific angles and numbers of revolutions. This precisely drives the catadioptric optical display lens group 4 (or the microchip display screen 5) to a predetermined position via the linkage mechanism. This solution allows for memory functionality, storing different users' personalized diopter settings for "one-click switching," greatly enhancing the user experience.

[0050] Example 5

[0051] This embodiment represents an advanced non-mechanical adjustment solution. The core of the diopter-adjustable structure is a variable focus lens unit, such as a liquid crystal lens or a liquid lens.

[0052] Taking a liquid crystal lens as an example, it consists of two layers of transparent electrodes sandwiching a layer of liquid crystal molecules. When different voltages are applied to the electrodes on the main board 3, the arrangement of the liquid crystal molecules changes, causing a change in its equivalent refractive index, thus exhibiting different focal lengths. By integrating such a liquid crystal lens into the catadioptric optical display lens group 4, stepless, rapid, and silent adjustment of the refractive power can be achieved through program-controlled voltage. This solution has a simple structure, extremely low power consumption, and a response speed in the millisecond range, making it an ideal choice for achieving adaptive optics correction.

[0053] Here, we need to distinguish this embodiment from embodiment 3. In embodiment 3, the catadioptric optical display lens group 4 includes a variable focus lens, while in this embodiment, the catadioptric optical display lens group 4 itself remains unchanged, but the diopter adjustment mechanism has a variable focus lens unit, which can be set on the optical display path of the catadioptric optical display lens group 4.

[0054] Example 6

[0055] In this embodiment, the diopter-adjustable structure 5 is an external quick-adjustment component.

[0056] Specifically, it can be a series of additional optical lenses with different refractive powers. These lenses are connected to the eyeglass frame 1 via a magnetic structure: a magnetic interface consisting of a ring magnet is pre-embedded in the eyeglass frame, while corresponding magnets of ferromagnetic material or opposite magnetic poles are embedded on the edge of the additional lens. The user only needs to bring the selected additional lens close to the interface, and it will automatically align and be attached under the action of magnetic force.

[0057] In addition, the quick-adjustment structure can also be snap-on (with snaps on the lens frame and slots in the frame), slide-in (similar to a filter holder), or adhesive (such as a disposable optical correction film). This method is inexpensive and easy to replace, making it particularly suitable as supplementary correction for a fixed prescription or in scenarios where multiple people share a pair of glasses.

[0058] Example 7

[0059] This embodiment aims to demonstrate and illustrate in detail the performance parameters achievable by the diopter-adjustable structure of this invention, namely, the adjustment range of -8D to +4D and the adjustment accuracy better than 0.1D. These parameters were determined based on optical theoretical calculations, selection of key component performance, and experimental verification.

[0060] 1. Justification for the adjustment range (-8D to +4D)

[0061] The adjustment range covers the correction needs of the vast majority of myopic and hyperopic users. According to global vision health epidemiological data, over 95% of people with vision abnormalities have refractive errors between -6D and +3D. This invention extends the range to -8D to +4D, providing ample margin for users with high myopia and hyperopia.

[0062] The technical feasibility of achieving this range is based on the principles of the following two main adjustment methods:

[0063] A. Achieve this by changing the lens group spacing (Δd):

[0064] When the method described in claims 2, 3, 5, 6, and 7 is used, i.e., adjustment is achieved by moving the optical components, the relationship between the change in refractive power (ΔD) and the amount of movement (Δd) can be approximately described by an optical formula:

[0065] ΔD ≈ - (D²) Δd

[0066] Where D is the initial fixed diopter of the optical display module (for example, it can be set to +10D to provide a virtual image at infinity).

[0067] Calculation example: If the initial system refractive power D = +10D, to achieve an accommodation amount from 0D (plano) to -8D (myopia correction) (i.e., ΔD = -8D), the required lens group movement Δd = -ΔD / D² = 8 / 100 = 0.08 meters = 8 millimeters.

[0068] Conclusion: An 8 mm linear travel along the optical axis is easily and compactly achievable mechanically (e.g., by rotating the lens barrel or using a slide rail). Similarly, the calculated travel amount for +4D positive adjustment is also on the order of millimeters. Therefore, an adjustment range from -8D to +4D is mechanically feasible.

[0069] B. Achieve this by changing the focal length of the lens (such as a liquid crystal lens):

[0070] When using the electrically controlled zoom lens as described in claims 4 and 8, its adjustment range is determined by the lens's inherent performance. Currently available commercially available zoomable liquid crystal lenses (such as Optotune's liquid crystal lenses or BLT's liquid crystal lenses) typically offer a single lens with a power variation range of ±5D or even wider. Combining two such lenses, or combining them with a fixed-power lens, can easily achieve a total adjustment range exceeding ±10D. Therefore, the requirement of -8D to +4D is conservative and fully achievable for electrically controlled zoom solutions.

[0071] 2. Demonstration of adjustment accuracy (better than 0.1D)

[0072] A precision of 0.1D means that it can distinguish one percent of a change in myopia of 1 degree (100 degrees), which is far higher than the commonly used interval of 0.25D in traditional optometry, and can meet the fine adjustment needs of the most demanding users.

[0073] The technological foundation for achieving this level of precision lies in high-precision execution and control systems:

[0074] A. For mechanical adjustment schemes: accuracy depends on the resolution of the drive mechanism.

[0075] Calculation example: Continuing with the optical system described above (D = +10D). To achieve an adjustment accuracy of 0.1D, the required displacement accuracy is: Δd_precision = 0.1 / (10²) = 0.1 / 100 = 0.001 m = 100 micrometers.

[0076] Feasibility study:

[0077] Rotating lens barrel (Example 4): If the pitch of the lens barrel thread is 0.5 mm (500 micrometers), then for every 1 degree of rotation, the corresponding linear displacement is 500 μm / 360° ≈ 1.39 micrometers. To achieve a displacement accuracy of 100 micrometers, the rotation angle only needs to be controlled within approximately 72 degrees. This is far lower than the angular resolution achievable by modern stepper motors or high-precision manual knobs (stepper motors can achieve 1.8 degrees / step, or 0.5 micrometers / step).

[0078] Conclusion: The displacement control accuracy of the mechanical solution is far higher than the requirement of 100 micrometers, so the diopter adjustment accuracy of better than 0.1D is more than sufficient.

[0079] B. For electronically controlled zoom solutions (such as Examples 3 and 5):

[0080] Accuracy depends on the control precision of voltage or current.

[0081] Argument: Suppose a liquid crystal lens can achieve a 10D optical power variation under a driving voltage of 0-50V. Then, each 1D variation corresponds to a 5V voltage. To achieve an accuracy of 0.1D, a voltage control precision of 0.5V is required. Modern digital-to-analog converters (DACs) can easily provide voltage control precision in the millivolt (mV) range.

[0082] Conclusion: The voltage control accuracy is three orders of magnitude higher than required. Therefore, the diopter adjustment accuracy of the electronic zoom solution can be stabilized at the 0.01D level, which is far better than the 0.1D requirement.

[0083] 3. Experimental verification data

[0084] To verify the above theory, we built a prototype and conducted tests. The testing method is as follows: using a professional optical focimeter and collimator, we measured the equivalent refractive power of the displayed virtual image under different adjustment settings.

[0085] Results Summary:

[0086] Adjustment range: The measured minimum diopter is -8.2D and the maximum diopter is +4.1D, which meets the requirement of -8D to +4D.

[0087] Adjustment accuracy: The minimum step size for diopter adjustment can be set to 0.05D throughout the entire range, and each step value is stable and repeatable. Multiple measurement data show that the standard deviation between the set value and the measured value is less than 0.03D.

[0088] In conclusion, whether from the perspective of optical theory, the performance indicators of key components, or the measured data of the prototype, the adjustment range and accuracy claimed by this invention are reasonable, reliable, and have a basis for industrial implementation.

Claims

1. An electronic myopia glasses, comprising: The eyeglasses frame, a camera module mounted on the eyeglasses frame, a motherboard, and a catadioptric optical display module, wherein the catadioptric optical display module includes a microchip display screen and a catadioptric optical display lens group, characterized in that: The electronic myopia glasses have an adjustable diopter structure, which is configured to change the diopter of the image projected by the user when viewing the image from the catadioptric optical display module, so as to meet the vision needs of different users. The diopter-adjustable structure can be achieved by the adjustment mechanism of the catadioptric optical display module body, or by a quick adjustment structure or means located outside the catadioptric optical display module; The camera module captures images of the real world and transmits them to the motherboard. The motherboard processes the image signals and then transmits them to the microchip display screen for display. The microchip display projects the image onto the catadioptric optical display lens group, which amplifies the light by changing the light path and then projects the light into the user's eyes.

2. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure achieves diopter adjustment by internally adjusting the relative positions between the catadioptric optical display lens groups.

3. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure achieves diopter adjustment by internally adjusting the relative position between the catadioptric optical display lens group and the microchip display screen.

4. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure achieves diopter adjustment by changing the curvature, refractive index, or other optical properties of the catadioptric optical display lens group.

5. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure includes a rotating lens barrel mechanism, which rotates the threaded lens barrel to move the catadioptric optical display lens group along the optical axis to achieve diopter adjustment.

6. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure is a slide rail drive mechanism, which adjusts the position of the catadioptric optical display lens group by moving the slider along the linear guide rail to achieve diopter adjustment.

7. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure includes an electric adjustment component, which includes a miniature drive motor and a linkage mechanism, and can automatically drive the catadioptric optical display lens group to achieve diopter adjustment.

8. The electronic myopia glasses according to claim 1, characterized in that: The diopter-adjustable structure includes a variable-focus liquid crystal lens or a liquid lens unit, and the diopter is adjusted by controlling the electrical signal to change the optical properties of the lens.

9. The electronic myopia glasses according to claim 1, characterized in that: The quick adjustment structure or means includes a detachable external lens, an additional optical lens, and an optical sheet or film that can be attached to the surface of a catadioptric optical display lens, for quickly changing the overall refractive power.

10. An electronic myopia glasses according to claim 1, characterized in that: The quick adjustment structure or means is connected to the eyeglass frame or folding optical display module via a snap-on, magnetic, sliding, or adhesive structure to facilitate quick installation and replacement.

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