Red light therapeutic instrument with pupil real-time monitoring and automatic dimming function

Abstract

The application discloses a red light therapeutic instrument with pupil real-time monitoring and automatic light adjusting functions, and relates to the technical field of medical instruments.The therapeutic instrument comprises a red light source module, an image acquisition module, a controller and a memory; the controller extracts dynamic change characteristic information such as pupil contraction speed, pupil contraction amplitude and pupil oscillation frequency from continuous eye images in real time, compares the dynamic change characteristic information with a preset model or a safety threshold as a biological feedback signal, and adjusts the output light intensity of the red light source module in a closed loop according to the comparison.The application judges whether the light is too strong by monitoring the dynamic characteristics such as the pupil contraction speed and the pupil contraction amplitude, and once the overactive protective contraction of the pupil is monitored, the system will immediately reduce the light intensity, thereby effectively reducing the discomfort and potential damage risk caused by the excessively high light intensity.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a red light therapy device with real-time pupil monitoring and automatic light adjustment functions. Background Technology

[0002] In recent years, red light therapy, especially low-intensity red light irradiation, has been widely used in areas such as myopia prevention and control in adolescents, relief of eye fatigue, and improvement of retinal function. Its basic principle is to irradiate the fundus with red light of a specific wavelength, improving choroidal blood flow, increasing retinal oxygen supply, thereby inhibiting axial elongation or repairing damaged cells.

[0003] Existing red light therapy devices typically use fixed light parameters for treatment. However, there are significant individual differences in the sensitivity of different users' eyes to light, and even for the same user, tolerance to light varies greatly under different physiological states. If the light intensity is too high, it may cause discomfort such as glare and stinging, and may even pose a potential risk of photochemical damage to the retina; if the light intensity is too low, the expected treatment threshold may not be reached, affecting the treatment effect.

[0004] Existing technologies include schemes that determine pupil state information by acquiring ocular surface images and control light source output accordingly. However, these schemes typically treat the pupil as a static aperture and calculate the light power entering the eye based on the pupil size, mainly addressing the issue of dosage accuracy. They do not fully consider the real-time dynamic physiological responses of the pupil to light stimulation, such as protective rapid contraction, continuous oscillation, or adaptive expansion.

[0005] Therefore, there is an urgent need for a red light therapy device that can monitor the dynamic response of the user's pupils to light in real time and automatically adjust the light intensity accordingly, so as to balance the safety, comfort and effectiveness of treatment. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a red light therapy device with real-time pupil monitoring and automatic dimming functions.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: A red light therapy device with real-time pupil monitoring and automatic dimming functions includes a red light source module, an image acquisition module, a controller, and a memory. The red light source module emits therapeutic red light to the user's eyes. The image acquisition module acquires real-time images of the user's eyes. The controller is electrically connected to the red light source module, the image acquisition module, and the memory. The controller is configured to execute the following control logic: The dynamic change feature information of the user's pupil is extracted in real time from the continuous eye images acquired by the image acquisition module. The dynamic change feature information includes at least the pupil contraction speed, the pupil contraction amplitude, and the pupil oscillation frequency under continuous light. The dynamic change feature information is used as a biofeedback signal and compared in real time with a preset pupil response model or safety threshold in the memory; and a dimming command is generated based on the comparison result to adjust the output light intensity of the red light source module in real time in a closed loop. The specific method of the real-time closed-loop adjustment includes: when the pupil contraction speed is detected to be greater than a preset contraction speed threshold, or the pupil contraction amplitude exceeds a preset amplitude threshold, it is determined that the current light intensity is too high, and the controller immediately generates a dimming command to reduce the light intensity.

[0008] As a preferred embodiment of the present invention, the specific method by which the controller performs real-time closed-loop adjustment of the output light intensity of the red light source module further includes: When the controller detects that the pupil is continuously expanding under the current light intensity and the expansion exceeds the preset adaptability threshold, it determines that the user has adapted to the current light intensity. The controller then generates a dimming command that gradually increases the light intensity with a preset step size until the pupil stops expanding or the preset maximum safe light intensity is detected.

[0009] As a preferred embodiment of the present invention, the red light therapy device further includes a near-infrared supplementary light module, which is connected to the controller; The controller is configured to activate the near-infrared supplementary light module while the red light source module is working, and the image acquisition module is a camera sensitive to near-infrared light, used to clearly capture the pupil outline under red light background interference.

[0010] As a preferred embodiment of the present invention, the red light source module adopts a semiconductor laser diode or light-emitting diode with a wavelength of 650nm±10nm, and its driving circuit supports pulse width modulation or current adjustment to achieve continuous or graded adjustment of light intensity.

[0011] As a preferred embodiment of the present invention, the near-infrared supplementary lighting module includes infrared LED beads with a wavelength of 850nm or 940nm, which are installed near the image acquisition module.

[0012] As a preferred embodiment of the present invention, the shrinkage speed threshold is 5 mm / s, the amplitude threshold is 50%, and the adaptability threshold is 10%.

[0013] As a preferred embodiment of the present invention: the red light therapy device is in the form of a head-mounted display device, a goggles-type device, or a desktop binocular vision training device. The image acquisition module includes two independent camera units corresponding to the user's left and right eyes, respectively. The controller is configured to independently monitor the dynamic change characteristics of the pupils of the left and right eyes, and independently adjust the light intensity of the corresponding red light source module.

[0014] As a preferred embodiment of the present invention: when the red light therapy device detects a difference in sensitivity of the left and right eyes to red light, the controller is configured to reduce the output intensity of the light source on the side with higher sensitivity and maintain or increase the output intensity of the light source on the side with lower sensitivity, so as to adapt to the difference in binocular vision function. The image acquisition module continuously acquires eye images at a frame rate of no less than 30fps, and the controller is configured to calculate the time series change of pupil diameter based on multiple consecutive frames of images to obtain pupil contraction speed, contraction amplitude and oscillation frequency.

[0015] As a preferred embodiment of the present invention, the memory is also used to store pupil dynamic change feature data, dimming instruction log, and individual user pupil response model during the treatment process, for subsequent treatment sessions to recall.

[0016] An automatic dimming method for a red light therapy device based on pupil dynamic feedback, applied to the aforementioned red light therapy device, includes the following steps: Initialization startup steps: Control the red light source module to start irradiating with a preset initial safe light intensity, and simultaneously turn on the image acquisition module; Image acquisition and feature extraction steps: continuously acquire user eye images at a frame rate of no less than 30fps, calculate pupil diameter through edge detection or Hough transform, and extract pupil contraction speed, pupil contraction amplitude and pupil oscillation frequency as dynamic change feature information; Comparison steps: The extracted dynamic change feature information is compared in real time with the preset pupil response model or safety threshold in the memory; Closed-loop dimming steps: When the pupil contraction speed is greater than the preset contraction speed threshold, or the pupil contraction amplitude exceeds the preset amplitude threshold, it is determined that the current light intensity is too high, and a dimming command to reduce the light intensity is generated and sent to the red light source module; when it is detected that the pupil shows a continuous expansion trend under the current light intensity and the expansion amplitude exceeds the preset adaptability threshold, a dimming command to gradually increase the light intensity with a preset step size is generated until the pupil stops expanding or the preset maximum safe light intensity is reached.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. This invention determines whether the light intensity is too strong by real-time monitoring of dynamic characteristics such as pupil contraction speed and pupil contraction amplitude. Once excessive protective contraction of the pupil is detected, the system will immediately reduce the light intensity, thereby effectively reducing discomfort and potential damage risks caused by excessive light intensity.

[0019] 2. By using biofeedback-based automatic dimming, this invention can always maintain the light intensity within a comfortable range for the user, thereby improving user experience and compliance.

[0020] 3. This invention can adapt to individual differences between different users and adaptive changes in the same user during the treatment process, ensuring that the best treatment dose is obtained under the premise of comfort.

[0021] 4. This invention improves the accuracy of pupil recognition and control stability under red light background by using a near-infrared supplementary lighting module and a corresponding photosensitive camera. Attached Figure Description

[0022] Figure 1 This is a system structure block diagram of a red light therapy device with real-time pupil monitoring and automatic dimming function provided in an embodiment of the present invention; Figure 2 This is a flowchart illustrating the automatic dimming control of a red light therapy device provided in an embodiment of the present invention. Figure 3 This is a schematic diagram illustrating the relationship between the dynamic changes in pupil size and light intensity regulation, as provided in an embodiment of the present invention.

[0023] In the diagram: 10 - Red light source module; 20 - Image acquisition module; 30 - Near-infrared supplementary light module; 40 - Controller; 50 - Memory. Detailed Implementation

[0024] The technical solution of the present invention will be further described in detail below with reference to specific embodiments.

[0025] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0026] Example 1: A red light therapy device with real-time pupil monitoring and automatic light adjustment functions, such as... Figure 1-3 As shown, its main hardware components include a red light source module 10, an image acquisition module 20, a near-infrared supplementary light module 30, a controller 40, and a memory 50.

[0027] The red light source module 10 uses a semiconductor laser diode or light-emitting diode with a wavelength of 650nm±10nm to emit low-intensity therapeutic red light to the user's eyes; the driving circuit of the red light source module supports pulse width modulation or current adjustment, and can realize continuous or graded adjustment of light intensity according to the instructions of the controller 40.

[0028] The image acquisition module 20 includes two miniature infrared cameras, corresponding to the left and right eyes of the human body, respectively; the near-infrared supplementary lighting module 30 includes infrared LED beads with a wavelength of 850nm or 940nm, which are installed near the image acquisition module 20; since the human eye is not sensitive to infrared light in this band, the supplementary lighting will not significantly cause pupil constriction, but can provide clear illumination for the camera.

[0029] The controller 40 may be a microcontroller unit, a digital signal processor, or an embedded system chip; the controller 40 is electrically connected to the red light source module 10, the image acquisition module 20, the near-infrared supplementary light module 30, and the memory 50 respectively; the memory 50 is used to store preset pupil response models, safety thresholds, and log data during operation.

[0030] like Figure 2 As shown, the working process of this embodiment includes: Step S1, Initialization and Startup: The user puts on the therapeutic device and starts the device. The controller 40 turns on the near-infrared supplementary light module 30 and controls the red light source module 10 to start irradiation with a preset initial safe light intensity. Step S2, image acquisition and feature extraction: the image acquisition module 20 continuously acquires user eye images at a frame rate of no less than 30 frames / second, and the controller 40 uses edge detection, Hough transform or deep learning model to identify the pupil region and calculate the pupil diameter in real time. Step S3, Biofeedback Comparison and Closed-Loop Regulation: The controller 40 compares the extracted dynamic change feature information with the preset pupil response model in real time, and generates dimming commands to increase light intensity, maintain light intensity or decrease light intensity accordingly.

[0031] When the red light therapy device detects that the pupil contraction speed is greater than 5 mm / s or the pupil contraction amplitude exceeds 50%, the controller 40 determines that the current light intensity is causing strong stimulation to the user and immediately reduces the output power of the red light source module 10 until the pupil state returns to stability. During the treatment process, if the pupil is detected to show a continuous and slow dilation trend under the current light intensity and the dilation amplitude exceeds 10%, the controller 40 determines that the user has adapted to the current light and generates a dimming command to gradually increase the light intensity in a preset step size.

[0032] like Figure 3As shown, under different light intensity steps, the pupil diameter exhibits dynamic changes such as contraction, recovery, and adaptive dilation. The controller 40 does not perform static dose calculation based solely on the pupil diameter at a single moment, but rather performs closed-loop adjustment based on the dynamic trend of pupil changes, thereby more promptly reflecting the user's physiological feedback to the current red light stimulation.

[0033] In binocular applications, the controller 40 processes image data for the left and right eyes independently. If it detects that the left eye is more sensitive to light while the right eye is less sensitive, the controller 40 will automatically reduce the intensity of the left light source while maintaining or appropriately increasing the intensity of the right light source to meet the treatment needs of users with significant differences in binocular vision.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A red light therapy device with real-time pupil monitoring and automatic dimming function, comprising a red light source module, an image acquisition module, a controller, and a memory, wherein the red light source module is used to emit therapeutic red light to the user's eyes, the image acquisition module is used to acquire real-time images of the user's eyes, and the controller is electrically connected to the red light source module, the image acquisition module, and the memory, respectively, characterized in that, The controller is configured to execute the following control logic: The dynamic change feature information of the user's pupil is extracted in real time from the continuous eye images acquired by the image acquisition module. The dynamic change feature information includes at least the pupil contraction speed, the pupil contraction amplitude, and the pupil oscillation frequency under continuous light. The dynamic change feature information is used as a biofeedback signal and compared in real time with a preset pupil response model or safety threshold in the memory; and a dimming command is generated based on the comparison result to adjust the output light intensity of the red light source module in real time in a closed loop. The specific method of the real-time closed-loop adjustment includes: when the pupil contraction speed is detected to be greater than a preset contraction speed threshold, or the pupil contraction amplitude exceeds a preset amplitude threshold, it is determined that the current light intensity is too high, and the controller immediately generates a dimming command to reduce the light intensity.

2. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 1, characterized in that, The specific method by which the controller performs real-time closed-loop adjustment of the output light intensity of the red light source module also includes: When the controller detects that the pupil is continuously expanding under the current light intensity and the expansion exceeds the preset adaptability threshold, it determines that the user has adapted to the current light intensity. The controller then generates a dimming command that gradually increases the light intensity with a preset step size until the pupil stops expanding or the preset maximum safe light intensity is detected.

3. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 1, characterized in that, The red light therapy device also includes a near-infrared supplementary light module, which is connected to the controller; The controller is configured to activate the near-infrared supplementary light module while the red light source module is working, and the image acquisition module is a camera sensitive to near-infrared light, used to clearly capture the pupil outline under red light background interference.

4. A red light therapy device with real-time pupil monitoring and automatic dimming function according to claim 1, characterized in that, The red light source module uses a semiconductor laser diode or light-emitting diode with a wavelength of 650nm±10nm, and its driving circuit supports pulse width modulation or current adjustment to achieve continuous or graded adjustment of light intensity.

5. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 3, characterized in that, The near-infrared supplementary lighting module includes infrared LED beads with a wavelength of 850nm or 940nm, which are installed near the image acquisition module.

6. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 2, characterized in that, The shrinkage speed threshold is 5 mm / s, the amplitude threshold is 50%, and the adaptability threshold is 10%.

7. A red light therapy device with real-time pupil monitoring and automatic dimming function according to any one of claims 1-6, characterized in that, The red light therapy device can be in the form of a head-mounted display device, a goggles-type device, or a desktop binocular vision training device. The image acquisition module includes two independent camera units corresponding to the user's left and right eyes, respectively. The controller is configured to independently monitor the dynamic changes in the pupils of the left and right eyes, and independently adjust the light intensity of the corresponding red light source module.

8. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 7, characterized in that, When the red light therapy device detects a difference in sensitivity to red light between the left and right eyes, the controller is configured to reduce the output intensity of the light source on the side with higher sensitivity and maintain or increase the output intensity of the light source on the side with lower sensitivity, in order to adapt to the difference in binocular vision function. The image acquisition module continuously acquires eye images at a frame rate of no less than 30fps, and the controller is configured to calculate the time series change of pupil diameter based on multiple consecutive frames of images to obtain pupil contraction speed, contraction amplitude and oscillation frequency.

9. A red light therapy device with real-time pupil monitoring and automatic light adjustment function according to claim 8, characterized in that, The memory is also used to store pupil dynamic change characteristic data during treatment, dimming command logs, and individual user pupil response models.

10. An automatic dimming method for a red light therapy device based on pupil dynamic feedback, applied to the red light therapy device as described in claim 1, characterized in that, Includes the following steps: Initialization startup steps: Control the red light source module to start irradiating with a preset initial safe light intensity, and simultaneously turn on the image acquisition module; Image acquisition and feature extraction steps: continuously acquire user eye images at a frame rate of no less than 30fps, calculate pupil diameter through edge detection or Hough transform, and extract pupil contraction speed, pupil contraction amplitude and pupil oscillation frequency as dynamic change feature information; Comparison steps: The extracted dynamic change feature information is compared in real time with the preset pupil response model or safety threshold in the memory; Closed-loop dimming steps: When the pupil contraction speed is greater than the preset contraction speed threshold, or the pupil contraction amplitude exceeds the preset amplitude threshold, it is determined that the current light intensity is too high, a dimming command to reduce the light intensity is generated and sent to the red light source module. When the pupil is detected to be continuously dilating under the current light intensity and the dilation exceeds the preset adaptive threshold, a dimming command is generated to gradually increase the light intensity with a preset step size until the pupil stops dilating or the preset maximum safe light intensity is reached.

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