Fixed focus electronic myopia glasses
By combining a fixed-focus camera module, a catadioptric optical display module, and a refractive correction module, the problems of complex equipment, high cost, and high power consumption in existing technologies are solved, achieving clear imaging in all scenarios and personalized correction, providing a lightweight and comfortable myopia correction solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI AVATAR THREE WORLDS TECH CO LTD
- Filing Date
- 2025-12-01
- Publication Date
- 2026-07-21
AI Technical Summary
Existing electronic myopia glasses use complex autofocus or zoom camera modules, resulting in high equipment costs, high power consumption, complex structure, and response delays, making them difficult to implement in lightweight, real-time display myopia correction glasses.
It employs a fixed-focus camera module, a catadioptric optical display module, and a diopter correction module, combined with a large depth-of-field design, multi-camera fusion, and computational imaging technology to achieve clear imaging in all scenes and personalized, precise correction, while reducing hardware costs and power consumption.
It achieves a clear visual experience across all scenarios with simple structure, low cost, and low power consumption, suitable for precise correction at different distances, relieves visual fatigue, and the device is lightweight and comfortable to wear.
Smart Images
Figure CN224536284U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smart wearable device technology, specifically a fixed-focus 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, these electronic glasses often employ complex autofocus or zoom camera modules, resulting in high device costs, high power consumption, complex structures, and response delays, making them unsuitable for practical application in myopia correction glasses that require lightweight, real-time display. Therefore, there is an urgent need in the field for an electronic myopia glasses solution that is simple in structure, low in cost, low in power consumption, and can provide clear vision in all scenarios.
[0005] Based on this, this utility model designs a fixed-focus electronic myopia glasses to solve the above problems. Utility Model Content
[0006] The purpose of this invention is to provide a fixed-focus 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] A fixed-focus electronic myopia glasses, comprising:
[0009] Eyeglasses frame; a fixed-focus camera module disposed on the eyeglasses frame for acquiring images of the external environment under fixed focal length conditions;
[0010] The motherboard is electrically connected to the fixed-focus camera module and is used to process the external environment image;
[0011] A catadioptric optical display module is electrically connected to the motherboard and is used to receive and display images processed by the motherboard.
[0012] The refractive error correction module is located on the optical path of the catadioptric optical display module and is configured to adjust the convergence or divergence of the output beam by changing the optical path parameters, thereby correcting the user's myopia.
[0013] As a further embodiment of this utility model: the fixed-focus camera module includes a fixed-focus camera with a large depth of field, the large depth of field being configured to keep the image captured by the fixed-focus camera in focus within a predetermined distance range, the predetermined distance range including close distance and long distance.
[0014] As a further embodiment of this utility model: the fixed-focus camera module includes a telephoto camera and a near-focus camera. The telephoto camera is used to capture images of distant environments, and the near-focus camera is used to capture images of close-up environments. The motherboard is configured to fuse the images captured by the telephoto camera and the near-focus camera to generate a composite image that is clear at both near and far distances.
[0015] As a further embodiment of this utility model: the fixed-focus camera module includes an extended depth-of-field camera, which achieves clear imaging over a wide distance range through wavefront coding optical design and image processing algorithms.
[0016] As a further embodiment of this utility model: the fixed-focus camera module includes a light field camera, which records the direction and intensity of light and combines computational photography algorithms to achieve full-clear image capture of both near and far views.
[0017] As a further embodiment of this utility model: the motherboard is configured to process the images captured by the fixed-focus camera module through depth-of-field synthesis, multi-frame synthesis or super-resolution reconstruction methods to achieve full-clear image capture of both near and far scenes.
[0018] As a further embodiment of this utility model: the refracting optical display module includes at least one reflective element and a display element, the reflective element is used to refract the optical path to reduce the size of the device, and the display element is used to display the image processed by the motherboard.
[0019] As a further aspect of this utility model: the refractive power correction module includes an adjustable focus lens, which adjusts the convergence or divergence of the output beam by changing the focal length or position, and the adjustable focus lens is selected from one or more of liquid crystal lenses or mechanical adjustment lenses.
[0020] As a further embodiment of this utility model: the motherboard includes an image processing unit, which is configured to sharpen, enhance, or correct distortion of the images captured by the fixed-focus camera module in order to improve the image display quality.
[0021] As a further embodiment of this invention: the fixed-focus camera module is disposed at the front end of the eyeglass frame, and the folding optical display module is disposed inside the temple or frame of the eyeglass frame, so as to optimize the device structure and wearing comfort.
[0022] Compared with the prior art, the beneficial effects of this utility model are:
[0023] 1. Cost and power consumption advantages: By adopting a fixed-focus camera module, the complex mechanical focusing structure is eliminated, which significantly reduces hardware costs and system power consumption.
[0024] 2. Clear imaging in all scenes: Through advanced technologies such as large depth of field design, multi-camera fusion, and computational imaging, it overcomes the inherent limitations of fixed-focus cameras in terms of depth of field, ensuring that users can obtain a clear visual experience at different distances.
[0025] 3. Personalized and precise correction: The independent refractive correction module can be precisely adjusted, covering the needs of most myopic users, and can be optimized according to different usage scenarios to effectively relieve visual fatigue.
[0026] 4. Compact structure: The catadioptric optical design effectively reduces the size of the display module, making the glasses lighter and more suitable for everyday wear. Attached Figure Description
[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention (Embodiment 1);
[0028] Figure 2 for Figure 1 A schematic diagram of a partial explosion (Example 1);
[0029] Figure 3 This is a schematic diagram of the overall structure of the present invention (Embodiment 2);
[0030] Figure 4 for Figure 1 A schematic diagram of a partial explosion (Example 2);
[0031] Figure 5 This is a schematic diagram of the overall structure of the present invention (Embodiment 3);
[0032] Figure 6 This is a schematic diagram illustrating the structural principle of the folding optical display module of this utility model.
[0033] The attached diagram lists the components represented by each number as follows:
[0034] 1. Eyeglass frame; 2. Fixed-focus camera module; 3. Ultra-deep-field fixed-focus camera; 4. Telephoto camera; 5. Near-focus camera; 6. EDoF camera; 7. Motherboard; 8. Cathodic optical display lens group; 9. Miniature OLED display element. Detailed Implementation
[0035] Please see Figure 1-2 This utility model provides a technical solution:
[0036] Example 1: (Large Depth-of-Field Fixed-Focus Camera Solution)
[0037] like Figure 1 and Figure 2 As shown, the fixed-focus electronic myopia glasses of this embodiment employ a super-depth-of-field fixed-focus camera 21 in its fixed-focus camera module 2. This super-depth-of-field fixed-focus camera 21 utilizes a small aperture (such as F / 8.0 or smaller) and a short focal length optical design to achieve a depth-of-field range from approximately 0.5 meters to infinity. This means that objects within this range can form a sufficiently clear image on the image sensor without mechanical focusing. After receiving this image, the motherboard 3 performs basic color correction, sharpening, and gamma correction before sending it to the catadioptric optical display module 4 for display. The diopter correction module uses a mechanical knob to adjust the lens spacing, providing users with diopter adjustment from -1D to -10D. This solution has the simplest structure and lowest cost.
[0038] Example 2: (Dual fixed-focus camera fusion scheme)
[0039] like Figure 3 As shown, in this embodiment, the fixed-focus camera module 2 includes a telephoto camera 22 and a close-focus camera 23. The optical focal length of the telephoto camera 22 is optimized for clearly capturing distant scenes beyond 5 meters, while the optical focal length of the close-focus camera 23 is optimized for clearly capturing close-up scenes from 0.3 meters to 1 meter. The motherboard 3 simultaneously receives images captured by the two cameras and runs an image fusion algorithm: first, the two images are calibrated and aligned; then, the clear regions of each image are extracted (distant scenes are extracted from the telephoto image, and close-up scenes are extracted from the close-focus image); finally, an image fusion technique is used to generate a composite image that is clear from near to far.
[0040] Example 3: (Extended Depth-of-Field EDoF Camera Solution)
[0041] This embodiment uses an extended depth-of-field (EDoF) camera 24 as a fixed-focus camera module 2. The specific setup is as follows: Figure 1 As shown, the specific setting location is not necessarily at the center of the eyeball; for example, it can be below the eyeball. Figure 5As shown, the EDoF camera 24 encodes the incident light rays using special wavefront-coded optical elements (such as a cubic phase plate), making its point spread function (PSF) insensitive to object distance, thus achieving a large depth of field. Although the original captured image is uniformly blurred, a dedicated image restoration algorithm (such as Wiener filtering or regularized deconvolution) running on the motherboard 3 can calculate an image that is sharp from near to far. This solution achieves full depth-of-field imaging with a single camera, representing a good balance between performance and cost.
[0042] Example 4: (Light Field Camera Solution)
[0043] In this embodiment, the fixed-focus camera module 2 uses a light field camera. The light field camera records four-dimensional information of light (including position and direction) through a microlens array. The motherboard 3 first calculates the depth map of the entire scene using a computational photography algorithm, and then synthesizes a clear image of the entire scene using digital refocusing technology. This solution is the most advanced and provides the greatest flexibility in post-processing, but it also has the highest system complexity and cost.
[0044] Example 5:
[0045] This embodiment can be seen as a supplement or enhancement to the above hardware solution. Regardless of the type of fixed-focus camera used, the motherboard 3 can be configured to execute advanced image processing algorithms to further improve image clarity. For example, through depth-of-field synthesis: continuously capturing multiple frames of images and using the parallax caused by minute movements of objects to synthesize an image with greater depth of field; through multi-frame super-resolution reconstruction: continuously capturing multiple frames of images with sub-pixel displacement and synthesizing a higher-resolution image; through multi-frame denoising and enhancement: improving the image signal-to-noise ratio and detail representation.
[0046] Example 6: (Specific implementation of the display and correction module)
[0047] The catadioptric optical display module 4 includes a miniature OLED display element 5 and a catadioptric optical lens group. For example... Figure 6As shown, the catadioptric optical lens group here uses a pancake optical system, meaning that the catadioptric optical lens group has three lenses arranged sequentially from the object side to the image side: a first lens G1, a second lens G2, and a third lens G3. The traditional arrangement is as follows: on the image side of the first lens G1, a polarizer, a reflective polarizer, a phase delay film, and an anti-reflective film are arranged sequentially from the inside out; on the image side of the second lens G2, a semi-reflective mirror is arranged. The optical path is folded, achieving a long optical path over a short physical distance, thus compressing the volume. The refractive power correction module is integrated into this optical path. One preferred embodiment is that the refractive power correction module can be a mechanically adjustable lens, whose function is to drive the third lens G3 to move towards the second lens G2. Another option is that the third lens G3 is a focusable lens, such as a liquid crystal lens. By controlling the voltage applied to the liquid crystal lens through the motherboard 3, its refractive index can be changed, thereby achieving continuous electronically controlled adjustment of the focal length, and thus changing the convergence of the output beam to match the user's refractive power requirements.
[0048] Example 7: (Image Quality Optimization)
[0049] This embodiment emphasizes the optimization of the image processing unit (IPU) on the motherboard 3. This unit performs a series of processing on the images captured by the camera, including but not limited to: sharpening (enhancing edge details), enhancement (adjusting contrast and saturation), and distortion correction (correcting barrel or pincushion distortion caused by the lens), to ensure that the final displayed image is clear, realistic, and undistorted.
[0050] Example 8: (Performance Parameters and Structural Optimization)
[0051] This embodiment summarizes the performance and structure of all the above embodiments. The refractive power correction module is designed to cover the range of -1D to -10D to meet the needs of users with low to high myopia. In terms of structural layout, the fixed-focus camera module 2 is preferably located at the front end of the eyeglass frame 1 to obtain an unobstructed field of vision; while the catadioptric optical display module 4 and the mainboard 3 are integrated inside the temple or frame. This layout is beneficial for the balanced distribution of weight and optimizes wearing comfort.
Claims
1. A fixed-focus electronic myopia glasses, characterized in that: include: Eyeglass frames; A fixed-focus camera module mounted on the eyeglasses frame is used to capture images of the external environment under fixed focal length conditions. The motherboard is electrically connected to the fixed-focus camera module and is used to process the external environment image; A catadioptric optical display module is electrically connected to the motherboard and is used to receive and display images processed by the motherboard. The refractive error correction module is located on the optical path of the catadioptric optical display module and is configured to adjust the convergence or divergence of the output beam by changing the optical path parameters, thereby correcting the user's myopia.
2. The fixed-focus electronic myopia glasses according to claim 1, characterized in that: The fixed-focus camera module includes a fixed-focus camera with a large depth of field, which is configured to keep the images captured by the fixed-focus camera in focus within a predetermined distance range, including both near and far distances.
3. The fixed-focus electronic myopia glasses according to claim 1, characterized in that: The fixed-focus camera module includes a telephoto camera and a near-focus camera. The telephoto camera is used to capture images of distant environments, and the near-focus camera is used to capture images of close-up environments. The motherboard is configured to fuse the images captured by the telephoto camera and the near-focus camera to generate a composite image that is clear at both near and far distances.
4. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The fixed-focus camera module includes an extended depth-of-field camera, which achieves clear imaging over a wide distance range through wavefront coding optical design and image processing algorithms.
5. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The fixed-focus camera module includes a light field camera, which records the direction and intensity of light and combines it with computational photography algorithms to achieve full-clear image capture of both near and far views.
6. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The motherboard is configured to process the images captured by the fixed-focus camera module using depth-of-field synthesis, multi-frame synthesis, or super-resolution reconstruction methods to achieve full-clear image capture of both near and far views.
7. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The catadioptric optical display module includes at least one reflective element and a display element. The reflective element is used to fold back the optical path to reduce the size of the device, and the display element is used to display the image processed by the motherboard.
8. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The refractive correction module includes an adjustable focus lens, which adjusts the convergence or divergence of the output beam by changing the focal length or position. The adjustable focus lens is selected from one or more of a liquid crystal lens or a mechanically adjustable lens.
9. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The motherboard includes an image processing unit configured to sharpen, enhance, or correct distortion of images captured by the fixed-focus camera module to improve image display quality.
10. A fixed-focus electronic myopia glasses according to claim 1, characterized in that: The fixed-focus camera module is located at the front end of the eyeglass frame, and the folding optical display module is located inside the temple or frame of the eyeglass frame to optimize the device structure and wearing comfort.