Control method and control device for preventing myopia of children

Abstract

The invention discloses a control method and a control device for preventing myopia of children. The control method comprises the following steps: monitoring a real-time distance between a user in a preset area in front of the television and a television screen, and identifying whether the user is a child; after determining that the user is a child, receiving a real-time distance, and comparing the real-time distance with a preset safe distance threshold value; if the real-time distance is smaller than the safe distance threshold value, adjusting an emergent light state of a television screen to a scattering state so as to shield a picture; and if the real-time distance is greater than or equal to the safe distance threshold, adjusting the emergent light state of the television screen to a transparent state so as to restore the picture to be clear. According to the technical scheme, children can be effectively helped to establish a long-term stable safe watching habit, and the myopia risk of children caused by watching television at a short distance is reduced.

Description

Technical Field

[0001] This invention relates to the field of myopia control technology, specifically to a control method and device for preventing myopia in children. Background Technology

[0002] With the increasing prevalence of television in families, especially the richer content available on smart TVs, children are spending more and more time watching television. From cartoons and educational programs to interactive games, television has become an important tool for children's daily entertainment and learning. However, due to their weaker self-control during their developmental stages, children easily move closer to the television screen as the story unfolds, with some younger children even sitting very close to it. Prolonged close-range television viewing by children can cause the ciliary muscles of the eyes to be in a state of tension for extended periods, leading to abnormal lens accommodation function. Over time, this significantly increases the risk of myopia, and close-range viewing has become one of the major contributing factors to the continued rise in childhood myopia rates.

[0003] The mainstream approach to protecting children from close-range television viewing involves directly cutting off the video signal or pausing the current content. While this physically prevents children from continuing close-range viewing, the sudden interruption disrupts their viewing immersion. This abrupt interruption not only severely damages their viewing experience but also easily triggers resistance, with some children potentially crying or exhibiting other defiant behaviors. This approach fails to help children establish long-term, stable, safe viewing habits and does not address the risk of myopia caused by close-range television viewing. Summary of the Invention

[0004] In view of the deficiencies in the existing technology, the present invention provides a control method for preventing myopia in children, which can effectively help children establish long-term and stable safe viewing habits and reduce the risk of myopia caused by watching TV at close range.

[0005] This application provides a control method for preventing myopia in children, the control method comprising:

[0006] Monitor the real-time distance between the user and the TV screen within a predetermined area in front of the TV, and identify whether the user is a child;

[0007] After confirming that the user is a child, the real-time distance is received and compared with a preset safe distance threshold.

[0008] If the real-time distance is less than the safe distance threshold, adjust the emitted light state of the TV screen to a scattering state to block the image;

[0009] If the real-time distance is greater than or equal to the safe distance threshold, adjust the emitted light state of the TV screen to a transparent state to restore the image clarity.

[0010] One aspect of identifying whether a user is a child includes:

[0011] The user's height is obtained and compared with a preset height threshold. If the user's height is less than the preset height threshold, the user is identified as a child.

[0012] And / or, acquire the user's facial features and identify the user's age based on a preset child facial feature model.

[0013] In one aspect, the step of monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television set includes:

[0014] The real-time distance between the user and the TV screen within a predetermined area in front of the TV is monitored at preset time intervals, wherein the preset time interval is greater than 2 seconds.

[0015] In one aspect, prior to the step of monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television, the following steps are included:

[0016] A safe distance threshold is set based on the parameters of the television set, wherein the parameters of the television set include at least the screen size, and the safe distance threshold is positively correlated with the screen size adjustment.

[0017] In one aspect, the steps of adjusting the emitted light state of a television screen to a diffused state include:

[0018] The ambient light intensity around the television is collected in real time, and the scattering gradient is determined based on the ratio of the real-time distance to the safe distance threshold.

[0019] The scattering parameters are adjusted by combining the scattering gradient with the ambient light intensity, so that the light emitted from the TV screen is switched to the corresponding scattering gradient.

[0020] In one aspect, the scattering gradient includes at least a first transmittance state, a second transmittance state, and a third transmittance state, wherein the transmittance of the first transmittance state is greater than that of the second transmittance state, and the transmittance of the second transmittance state is greater than that of the third transmittance state.

[0021] The step of determining the scattering gradient based on the ratio of the real-time distance to the safe distance threshold includes:

[0022] When the real-time distance is 70%-100% of the safe distance threshold, the scattering gradient is determined to be the first transmittance state;

[0023] When the real-time distance is 40%-70% of the safe distance threshold, the scattering gradient is determined to be the second transmittance state;

[0024] When the real-time distance is less than 40% of the safe distance threshold, the scattering gradient is determined to be the third transmittance state.

[0025] In one aspect, the control method further includes:

[0026] If the real-time distance of a child user is detected to be less than the safe distance threshold for more than the warning time, the scattering gradient is gradually increased to the highest gradient and a voice prompt is given.

[0027] If a child user is detected to have retreated beyond the safe distance threshold, the transparent state will be gradually restored according to the scattering gradient within a specified time.

[0028] In one aspect, the control method further includes:

[0029] Record the number of times children view the screen at close range and the cumulative duration of close-range viewing, and regularly provide the data back to parents;

[0030] If the number of close-range viewings in a single day exceeds the preset number or the cumulative viewing time exceeds the time limit, a vision protection warning message will be sent to the parents.

[0031] In one aspect, the control method further includes:

[0032] Upon receiving an exemption command from a parent, the system will pause adjusting the emitted light from the TV screen for a preset exemption period, and automatically resume normal monitoring after the exemption period ends.

[0033] Furthermore, to address the aforementioned problems, this application also provides a control device for preventing myopia in children. The control device is either built into a television set or externally positioned at the front of the television screen. The control device includes:

[0034] The monitoring module is used to monitor the real-time distance between the user and the TV screen within a predetermined area in front of the TV, and to identify whether the user is a child;

[0035] The comparison module is used to receive the real-time distance after confirming that the user is a child, and compare the real-time distance with a preset safe distance threshold.

[0036] The adjustment module is used to adjust the emitted light state of the TV screen to a scattering state to block the image if the real-time distance is less than the safe distance threshold; and to adjust the emitted light state of the TV screen to a transparent state to restore the image clarity if the real-time distance is greater than or equal to the safe distance threshold.

[0037] The beneficial effects of this invention are as follows: by monitoring the real-time distance between the user and the screen within a predetermined area in front of the television and identifying whether the user is a child, the real-time distance is compared with a preset safe distance threshold. When it is confirmed that a child is watching at close range (i.e., the real-time distance is less than the safe distance threshold), the light emitted from the screen is adjusted to a scattering state to block the image. Once the real-time distance is greater than or equal to the safe distance threshold, the screen is restored to a transparent state. This avoids the problem of sudden program interruption caused by directly cutting off the signal or pausing playback. It also guides children to actively adjust their viewing distance through the gentle intervention of image blocking, without disrupting their viewing immersion or causing resistance. This helps children develop an understanding of safe distance through continuous viewing experience, thereby cultivating long-term and stable safe viewing habits and reducing the risk of myopia caused by close-range television viewing. Attached Figure Description

[0038] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0039] Figure 1 This is a schematic diagram illustrating the steps of the control method for preventing myopia in children as described in this application;

[0040] Figure 2 This is a schematic diagram of the process steps for identifying a user as a child in the control method of this application;

[0041] Figure 3 A schematic diagram illustrating the process steps for setting the safe distance threshold in the control method of this application;

[0042] Figure 4 This is a schematic diagram of the process steps in the control method of this application to switch the scattering gradient according to the ratio of real-time distance to a safe distance threshold;

[0043] Figure 5 This is a schematic diagram illustrating the process steps for sending early warning information to parents in the control method of this application.

[0044] Figure 6 This is a schematic diagram of the functional modules of the control device for preventing myopia in children according to this application. Detailed Implementation

[0045] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0046] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0047] like Figure 1 As shown, this application provides a control method for preventing myopia in children, the control method including:

[0048] Step S10: Monitor the real-time distance between the user and the TV screen within a predetermined area in front of the TV, and identify whether the user is a child. The predetermined area is pre-defined based on the size of the family living room and the placement of the TV, covering the common viewing activity range of children. During TV operation, the specific area in front of it is continuously monitored. The distance detection component captures the straight-line distance between the user and the TV screen surface in real time, ensuring that the distance data dynamically reflects changes in the user's viewing position. Detection components include infrared distance sensors and ultrasonic sensors. Simultaneously, the physiological characteristics of the user within the area are obtained through a feature recognition component, and based on preset child characteristic judgment criteria, it is determined whether the current user is a child.

[0049] Step S20: After confirming that the user is a child, receive the real-time distance and compare the real-time distance with the preset safe distance threshold; when it is confirmed that the current viewing user is a child, receive the real-time distance data transmitted by the distance detection component, and at the same time retrieve the preset safe distance threshold; compare the real-time distance with the safe distance threshold numerically, and determine whether the child's current viewing position is within the range of visual safety through the comparison result, and only trigger intervention when the child views at close range.

[0050] Step S30: If the real-time distance is less than the safe distance threshold, adjust the emitted light state of the TV screen to a scattering state to block the image. When the real-time distance between the child and the TV screen is less than the preset safe distance threshold, send a control command to the screen light adjustment component to switch the emitted light state of the TV screen to a scattering state. In the scattering state, the screen light is scattered, and the originally clear playback image will appear blurry, thereby blocking the image content and making it impossible for the child to watch clearly. This guides the child to actively adjust their viewing position to restore a clear image. During this process, the sound playback of the TV can remain normal to avoid causing the child's resistance due to program interruption.

[0051] Step S40: If the real-time distance is greater than or equal to the safe distance threshold, adjust the emitted light state of the TV screen to a transparent state to restore the image clarity. When the real-time distance between the child and the screen is greater than or equal to the safe distance threshold, or when the child actively adjusts their position to a safe distance range after triggering the scattering state, a recovery command is sent to the screen light adjustment component. The control component switches the emitted light state of the screen from the scattering state back to the transparent state. In the transparent state, the screen light no longer scatters, and the originally blurry image becomes clear again, allowing the child to watch TV programs normally. This forms a cycle of adjustment between close-range blocking and safe distance restoration, helping children gradually develop the habit of maintaining a safe distance while watching TV.

[0052] This embodiment monitors the real-time distance between the user and the screen within a predetermined area in front of the television and identifies whether the user is a child. The real-time distance is then compared to a preset safe distance threshold. If a child is confirmed to be watching at close range (i.e., the real-time distance is less than the safe distance threshold), the screen's emitted light is adjusted to a diffused state to obscure the image. Once the real-time distance is greater than or equal to the safe distance threshold, the screen is restored to a transparent state. This avoids the problem of sudden program interruption caused by directly cutting off the signal or pausing playback. It also guides children to actively adjust their viewing distance through gentle intervention of image obscuring, without disrupting their viewing immersion or causing resistance. This helps children develop an understanding of safe distances through continuous viewing, thereby cultivating long-term, stable safe viewing habits and reducing the risk of myopia caused by close-range television viewing.

[0053] like Figure 2 As shown, the steps to identify whether a user is a child include:

[0054] Step S110: Obtain the user's height and compare it with a preset height threshold. If the user's height is less than the preset height threshold, the user is identified as a child. The actual height can be calculated by combining the horizontal distance between the user and the screen and the image ratio. At the same time, retrieve the preset height threshold, which is determined with reference to the average height range of children of different age groups, the height dividing standard between children and adults, and the common height range of children in family use scenarios. For example, 1.4 meters can be set as the preset height threshold. Then, compare the obtained actual height of the user with the preset height threshold. If the user's height is less than the preset height threshold, the current user is determined to meet the characteristics of a child, and the child identification is completed.

[0055] Step S120: Acquire the user's facial features and identify the user's age based on a preset child facial feature model. In the child identification process, a facial image of the user in front of the television is captured using a camera or other visual acquisition components. Facial feature information is extracted from the image, including facial contour proportions (such as the ratio of forehead width to total face width, and the ratio of eye distance to face width), facial features (such as eye size, nose bridge height, and jawline curvature), and skin texture. Simultaneously, a preset child facial feature model is pre-stored. This model is generated through training on a large amount of facial feature data from children of different ages, including the unique contour proportion range, facial feature parameters, and age-related features specific to children's faces. The extracted user facial features are matched against the preset child facial feature model. The feature matching degree determines whether the user's face conforms to the rules of child facial features. Furthermore, the user's age is estimated by combining the age-related features in the child facial feature model. If the estimated age falls within the child's age range (such as 3-12 years old), accurate identification of the child's identity is completed, ensuring that subsequent protective operations are triggered only for child users.

[0056] In one embodiment of this application, the step of monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television set includes:

[0057] Step S101: Monitor the real-time distance between the user and the television screen within a predetermined area in front of the television at preset time intervals, wherein the preset time interval is greater than 2 seconds. When the television is on and playing, activate the distance monitoring component to periodically detect the distance within the predetermined area in front of the television at preset time intervals. The set time interval must be greater than 2 seconds to avoid frequent component activation due to excessively short detection intervals, reducing unnecessary energy consumption and data redundancy, and extending component lifespan; on the other hand, it prevents false detections caused by people briefly passing through the predetermined area, ensuring that each monitoring data accurately reflects whether the user is continuously viewing within that area. During each monitoring, the distance monitoring component captures the straight-line distance between the user and the surface of the television screen within the predetermined area.

[0058] like Figure 3 As shown, before the step of monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television, the following steps are included:

[0059] Step S01: Adjust and set the safe distance threshold based on the TV's parameters. The TV parameters include at least the screen size, and the safe distance threshold is positively correlated with the screen size. Before activating the child myopia control function, first complete the initial setting of the safe distance threshold. The safe distance threshold is determined based on the TV's own parameters, with the primary reference parameter being the TV screen size. Different TV sizes have different viewing distance requirements. The larger the screen size, the farther the required safe viewing distance is to ensure visual comfort and avoid excessive eye strain. Therefore, the safe distance threshold and screen size must maintain a positive correlation; that is, when the screen size increases, the safe distance threshold should be adjusted upwards, and when the screen size decreases, the safe distance threshold should be adjusted downwards. For example, for 32-43 inch TVs, the safe distance threshold can be set to 1.5 meters to 2.0 meters; for 49-55 inch TVs, the safe distance threshold is set to 2.0 meters to 2.3 meters; and for 65-inch and larger TVs, the safe distance threshold is set to 2.3 meters to 2.8 meters. In addition to screen size, if the TV has other parameters that affect the viewing experience, such as resolution and screen brightness, these parameters can also be used to fine-tune the threshold to form a safe distance threshold that is compatible with the current TV.

[0060] like Figure 4 As shown, the steps for adjusting the emitted light state of a television screen to a diffused state include:

[0061] Step S310: Real-time acquisition of ambient light intensity around the TV; determination of scattering gradient based on the ratio of real-time distance to a safe distance threshold. When initiating the screen light adjustment process, ambient light detection components (such as photosensors) capture the ambient light intensity around the TV in real-time, recording the current environment's light intensity data, such as strong light during the day with ample natural light, moderate light at night with indoor lights on, and weak light at night with lights off, providing environmental basis for adjusting scattering parameters. Simultaneously, real-time distance is retrieved, and the ratio between the real-time distance and a preset safe distance threshold is calculated. A larger ratio indicates the child is closer to the safe distance, while a smaller ratio indicates the child is closer to the screen. Different scattering gradients are assigned based on the ratio; for example, a ratio between 70% and 100% corresponds to a mild scattering gradient; a ratio between 40% and 70% corresponds to a moderate scattering gradient; and a ratio below 40% corresponds to a severe scattering gradient. By matching different intensity scattering gradients to the ratio, the degree of scattering is ensured to match the risk level of close-range viewing by the child.

[0062] Step S320: Adjust the scattering parameters based on the scattering gradient and ambient light intensity to switch the emitted light from the TV screen to the corresponding scattering gradient. After determining the scattering gradient, comprehensively adjust the screen's scattering parameters based on the collected ambient light intensity data. For example, if a mild scattering gradient is determined, in a bright light environment, to avoid the ambient light masking the scattering effect and preventing children from perceiving changes in the image, the transmittance can be appropriately reduced and the scattering angle increased to ensure a clear, slightly blurred image. In a low light environment, to prevent excessive scattering from causing the image to be too dark and irritating to the eyes, the transmittance can be appropriately increased and the scattering angle decreased, ensuring both the masking effect and visual comfort. If a moderate or severe scattering gradient is determined, the parameters also need to be fine-tuned according to the ambient light intensity. In a bright light environment, the standard scattering parameters corresponding to this gradient can be maintained; in a low light environment, the transmittance can be appropriately increased to prevent the image from being too dark and affecting children's perception of the distance that needs to be adjusted. By adjusting the scattering gradient in conjunction with the ambient light intensity, the emitted light from the TV screen is precisely switched to a scattering gradient that matches the current scene, achieving both screen occlusion and eye protection and viewing experience.

[0063] In one embodiment of this application, the scattering gradient includes at least a first transmittance state, a second transmittance state, and a third transmittance state. The transmittance of the first transmittance state is greater than that of the second transmittance state, and the transmittance of the second transmittance state is greater than that of the third transmittance state. The first transmittance state corresponds to a mild scattering effect, with transmittance typically controlled between 60% and 80%. At this state, the screen image is only slightly blurred, and children can perceive the changes in the image but will not be completely unable to discern them. The second transmittance state corresponds to a moderate scattering effect, with transmittance generally set between 30% and 60%. The blurring of the screen image is significantly increased, making it difficult for children to clearly see the details. The third transmittance state corresponds to a severe scattering effect, with transmittance maintained at only 10% to 30%. The screen image presents a distinctly milky white semi-transparent state, making it almost impossible to discern the specific content. This is suitable for high-risk scenarios where children are extremely close to the screen. By classifying the transmittance states into different levels, the corresponding scattering effect can be matched according to the risk level of close-range viewing by the child, achieving progressive and precise screen occlusion intervention.

[0064] The steps for determining the scattering gradient based on the ratio of real-time distance to a safe distance threshold include:

[0065] In step S311, when the real-time distance is 70%-100% of the safe distance threshold, the scattering gradient is determined to be in the first transmittance state. During the determination of the scattering gradient, when the real-time distance between the child and the TV screen is detected to be within the preset safe distance threshold range of 70%-100%, although the child has not fully reached the safe distance, the distance is relatively close, and the risk to vision from close-range viewing is relatively low. Therefore, the current scattering gradient is determined to be in the first transmittance state. In the first transmittance state, the screen transmittance remains at a high level, such as 60%-80%, exhibiting a slight scattering effect. The image will be slightly blurred, but the general content can still be discerned. This slight scattering design allows children to perceive the changes in the image caused by improper viewing distance, guiding them to actively adjust their position, without causing resistance due to excessive blurring of the image. It serves as a reminder while also considering the viewing experience.

[0066] Step S312: When the real-time distance is 40%-70% of the safe distance threshold, the scattering gradient is determined to be in the second transmittance state. When the real-time distance between the child and the screen is detected to be within the preset safe distance threshold range of 40%-70%, it indicates that the child has clearly moved close to the screen, is far from the safe range, and is in a state of easy eye fatigue. The risk of close-range viewing is moderately increased. At this time, the scattering gradient needs to be adjusted to the second transmittance state. The transmittance of the second transmittance state is lower than that of the first transmittance state. For example, if the transmittance is 30%-60%, the screen scattering effect is significantly enhanced, the blurring of the picture is significantly increased, and the child has difficulty clearly seeing the details of the picture, such as the facial features of the animated characters and the text content. By using moderate intensity of screen occlusion, the prompt effect of adjusting the distance when too close is further strengthened, prompting the child to actively move back to a safe distance, while avoiding resistance behavior caused by the inability to recognize the picture due to excessive scattering.

[0067] Step S313: When the real-time distance is below 40% of the safe distance threshold, the scattering gradient is determined to be in the third transmittance state. When the real-time distance between the child and the TV screen is detected to be below 40% of the preset safe distance threshold, the child is in a state of extremely close viewing. The ciliary muscles of the eyes will be continuously tense, and the risk of myopia will increase significantly. At this time, the highest intensity of scattering intervention needs to be activated to determine the scattering gradient as the third transmittance state. The transmittance of the third transmittance state is the lowest among the three states, such as 10%-30%. The scattering degree of the light emitted from the screen is the strongest, and the picture shows a clear milky white semi-transparent effect, making it almost impossible to identify any effective content. By strongly blocking the screen, the child's need to view the clear picture is directly cut off, forcing the child to realize that they must move back to a safe distance to resume normal viewing, thereby quickly guiding them to adjust their position and minimizing the damage to eyesight caused by extremely close viewing.

[0068] In one embodiment of this application, the control method further includes:

[0069] Step S50: If the real-time distance of the child user is detected to be less than the safe distance threshold for more than the warning time, the scattering gradient is gradually increased to the highest gradient, and a voice prompt is given. After the screen scattering state adjustment has been triggered, the real-time distance between the child user and the screen is continuously monitored, and the duration of the child being in a state where the real-time distance is less than the safe distance threshold is recorded. When the duration exceeds the preset warning time, such as 5 minutes, the warning time can be customized according to the child's age and usage scenario, indicating that the child has not actively adjusted the viewing distance, the current intervention effect of the scattering gradient is insufficient, and the intervention intensity needs to be increased. At this time, the screen scattering degree will be gradually increased according to the scattering gradient level until the highest scattering gradient is reached, such as transitioning from the first transmittance state to the second transmittance state, and then to the third transmittance state, to strengthen the prompt through a progressive image blurring effect. At the same time, the voice prompt function is activated, and a preset gentle prompt voice is played to guide the child to actively move back to the safe distance from both a visual and auditory perspective.

[0070] Step S51: If a child user is detected to have moved beyond the safe distance threshold, the screen will gradually return to a transparent state according to the scattering gradient within a specified time. When it is detected that the child user has actively adjusted their position and the real-time distance has returned to beyond the safe distance threshold, there is no need to maintain the high scattering state, and the screen recovery process will be initiated. The recovery process does not directly switch to the transparent state, but rather transitions gradually in reverse according to the scattering gradient levels, such as transitioning from the third transmittance state to the second transmittance state, then to the first transmittance state, and finally to the transparent state. The entire transition process is controlled within a preset specified time, such as 3-5 seconds. This gradual recovery process avoids the visual impact on children's eyes caused by the sudden change from blurry to clear screen images, reducing eye discomfort. At the same time, it allows children to clearly perceive the association between the image gradually becoming clear after moving back to a safe distance, strengthening their cognitive understanding of the correspondence between safe distance and clear viewing, and helping them more easily develop the habit of actively maintaining a safe distance.

[0071] like Figure 5 As shown, the control method also includes:

[0072] Step S60: Record the number of times the child user views the TV at close range and the cumulative duration of close-range viewing, and periodically provide data feedback to parents. During the operation of the child myopia control function, continuously track and record the child user's viewing behavior data. The core recorded content includes two aspects: first, the number of times close-range viewing occurs, i.e., the number of times the screen scatter adjustment is triggered when the child's real-time distance is less than the safe distance threshold; second, the cumulative duration of close-range viewing, i.e., the total duration of each instance of the child being in a close-range viewing state. This data is compiled and summarized according to a preset cycle to form a concise and clear data report, such as 3 close-range views per day and a cumulative duration of 25 minutes, and sent to parents via the accompanying app or push notification. Parents can use this data to intuitively understand the frequency and duration of their child's daily or weekly close-range TV viewing, promptly grasp their child's viewing habits, and facilitate parents' guidance to adjust their child's viewing behavior.

[0073] Step S61: When the number of close-range viewing sessions in a single day exceeds a preset limit or the cumulative viewing time exceeds the time limit, a vision protection warning message is sent to the parents. Pre-set safe distance thresholds for children's close-range viewing in a single day include a preset number of sessions (e.g., 3 times per day) and a time limit (e.g., 30 minutes cumulatively per day). These thresholds are set with reference to medical recommendations for children's vision protection and everyday usage scenarios. During daily operation, the currently recorded number of close-range viewing sessions is compared in real time with the preset number of sessions, and the cumulative close-range viewing time is compared with the time limit. If any indicator reaches or exceeds the corresponding threshold, such as 4 close-range viewing sessions in a single day or 35 minutes of cumulative viewing time, it is determined that the child's close-range viewing behavior has exceeded the safe boundary, potentially increasing the risk of myopia. At this time, a vision protection warning message is immediately generated. The warning message clearly marks the specific indicators that exceed the standard (such as the number of close-range viewings today has reached 4 times, exceeding the preset 3 times) and the corresponding risk warnings (such as frequent close-range viewing can easily lead to eye fatigue, it is recommended to reduce the time spent watching TV and supervise the maintenance of a safe distance). The message is also pushed to parents through the accompanying APP pop-up window, SMS and other means to remind parents to intervene in time and avoid children being in a high-risk viewing state for a long time.

[0074] In one embodiment of this application, the control method further includes:

[0075] Step S70: Receive the exemption command sent by the parent. Pause the adjustment of the TV screen's emitted light state for a preset exemption duration. Automatically resume normal monitoring after the exemption duration ends. During normal operation of the child myopia control function, it remains in a state that can receive external commands. When parents need to adjust the TV settings due to special circumstances, such as needing to guide children to watch educational programs at close range or help them adjust TV settings, they can send an exemption command through the accompanying APP or designated operation method. The operation of adjusting the screen's emitted light to a scattered state when the real-time distance is less than the safe distance threshold will be paused according to the preset exemption duration carried in the exemption command or preset. At this time, even if the child is watching at close range, the screen will maintain its current clear display state without light adjustment intervention, meeting the temporary use needs of parents. When the preset exemption duration ends, the system will automatically switch back to normal monitoring state without parental intervention, restarting distance monitoring, child recognition, and light adjustment functions. This ensures that myopia protection for children's viewing behavior continues even after the special circumstances, balancing flexibility with overall protection effectiveness.

[0076] like Figure 6 As shown, this application also provides a control device for preventing myopia in children. The control device is built into a television set or externally placed at the front of the television screen, where the front of the television screen refers to the end in the direction of light emission. The control device includes: a monitoring module 10, a comparison module 20, and an adjustment module 30.

[0077] The monitoring module 10 is used to monitor the real-time distance between the user and the television screen within a predetermined area in front of the television, and to identify whether the user is a child. The monitoring module 10 is a sensing component for controlling myopia in children. The monitoring module 10 has two functions: First, distance monitoring. Through an integrated distance detection element, it continuously scans a specific area in front of the television, captures the straight-line distance between the user and the surface of the television screen in real time, and transmits the distance data synchronously to the subsequent processing stage to dynamically reflect changes in the user's viewing position. Second, child identification. It uses a visual acquisition element to obtain the user's physiological characteristics and combines them with preset child characteristic judgment criteria to distinguish the user's identity and accurately identify whether the current viewer is a child, avoiding unnecessary interference with adult viewing behavior.

[0078] The comparison module 20 receives the real-time distance after confirming the user is a child and compares it with a preset safe distance threshold. The comparison module 20 is a processing component connecting the monitoring module 10 and the adjustment module 30. It only starts operating when the monitoring module 10 confirms the current user is a child. Upon receiving the child user's real-time distance data transmitted by the monitoring module 10, the comparison module 20 immediately retrieves the preset safe distance threshold and, through its built-in numerical comparison unit, quantitatively compares the real-time distance with the safe distance threshold, generating two judgment results: real-time distance less than the safe distance threshold or real-time distance greater than or equal to the safe distance threshold. This comparison process ensures the accuracy of intervention, triggering subsequent screen light adjustment operations when the child is viewing at close range, thus avoiding ineffective intervention and ensuring timely protection.

[0079] The adjustment module 30 is used to adjust the emitted light state of the TV screen to a diffused state to block the image if the real-time distance is less than the safe distance threshold; and to adjust the emitted light state of the TV screen to a transparent state if the real-time distance is greater than or equal to the safe distance threshold, so that the image is clear again. The adjustment module 30 is the execution component for controlling the screen light state, and its operation is based on the judgment result output by the comparison module 20. When the comparison module 20 determines that the real-time distance is less than the safe distance threshold, the adjustment module 30 sends a command to the light control unit of the TV screen, causing the emitted light from the screen to switch to a diffused state. That is, by changing the light propagation path, the originally clear playback image becomes blurred, thereby blocking the image content and guiding children to actively adjust their viewing distance, while maintaining normal sound playback to avoid program interruption and causing resistance. When the comparison module 20 determines that the real-time distance is greater than or equal to the safe distance threshold, the adjustment module 30 sends a restoration command, controlling the screen light to switch from the diffused state back to the transparent state, restoring the image to clarity so that children can watch normally. Through the dynamic switching between these two states, a cyclical protection of near-distance blocking and safe distance restoration is formed, helping children develop safe viewing habits.

[0080] This application presents a child myopia control device that can be an external structure independent of the television set or embedded within it. The external structure does not require deep integration with the television's internal circuitry or motherboard; for example, it can be a hook-and-loop front-mounted component. The main body of the control device consists of a distance monitoring module, a child recognition module, a control chip, and a light-adjusting component that can switch between light states. The overall structure is a thin, frame-like or patch-like design. It can be securely attached to the front of the television screen using elastic hooks, magnetic clips, or adhesive tape on the device's edges, adapting to different screen sizes. During use, the device is powered by an independent lithium battery or an external power source, eliminating reliance on the television's power supply. The distance monitoring and child recognition functions directly sense the area in front of the screen. The control chip drives the light-adjusting component to switch between transparent and diffused states based on the monitoring results. The adjusting component covers the screen display area, ensuring that the light switching effect fully applies to the area the child is viewing. This achieves flexible adaptation to the television while reducing the need for modifications to the existing television structure. It is suitable for upgrading the protective function of existing traditional televisions in homes or for general protection scenarios involving different brands and models of televisions. The built-in structure integrates the monitoring module 10, comparison module 20, and adjustment module 30 directly into the television, forming an integrated design with the television's motherboard, power system, and screen panel. For example, the monitoring module 10 can be embedded in the screen bezel or a pre-drilled opening on the front of the television. The comparison module 20 and adjustment module 30 are both integrated into the television's main control board or a dedicated control board as hardware circuits or embedded programs, working in conjunction with the television's existing system. No separate power supply is required; it automatically starts when the television is powered on, without occupying extra space or affecting the television's appearance, while achieving rapid response in monitoring, judgment, and light adjustment, and is compatible with original equipment manufacturer (OEM) smart televisions.

[0081] Furthermore, this application achieves effect conversion by altering the light propagation path, primarily encompassing four types of solutions. The first and second types are externally placed at the front of the television screen, while the third and fourth types are built into the television. The first type is an electrochromic film solution, a thin film composed of an electrochromic layer and a transparent conductive layer, which can be adhered to the front of the screen. By controlling the output of different voltages by a chip, the molecular structure of the electrochromic layer is altered, achieving direct or scattered light with a response speed of 0.1-1 seconds. The second type is a liquid crystal dimming glass solution, using a polymer-dispersed liquid crystal layer as its core, sandwiched between two pieces of transparent conductive glass. When energized, the liquid crystal molecules are arranged in an ordered manner (transparent state); when de-energized, they are randomly arranged, scattering light (scattered state). The third type is an OLED self-emissive dimming solution, integrated inside the OLED screen. It adjusts the pixel luminous intensity through a pixel control chip and activates the micro-nano structure scattering coating on the screen surface, exhibiting a fast response speed and enabling pixel-level precise scattering. The fourth type is the adjustment module 30, which includes a software-linked sensor. The software-linked sensor is built into the TV. When it detects that the distance is too close, it triggers a software pop-up window. By adjusting the transparency of the pop-up window, a blurred image effect is achieved.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A method for controlling myopia in children, characterized in that, The control method includes: Monitor the real-time distance between the user and the TV screen within a predetermined area in front of the TV, and identify whether the user is a child; After confirming that the user is a child, the real-time distance is received and compared with a preset safe distance threshold. If the real-time distance is less than the safe distance threshold, adjust the emitted light state of the TV screen to a scattering state to block the image; If the real-time distance is greater than or equal to the safe distance threshold, adjust the emitted light state of the TV screen to a transparent state to restore the image clarity.

2. The control method according to claim 1, characterized in that, The steps to identify whether a user is a child include: The user's height is obtained and compared with a preset height threshold. If the user's height is less than the preset height threshold, the user is identified as a child. And / or, acquire the user's facial features and identify the user's age based on a preset child facial feature model.

3. The control method according to claim 1, characterized in that, The steps for monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television set include: The real-time distance between the user and the TV screen within a predetermined area in front of the TV is monitored at preset time intervals, wherein the preset time interval is greater than 2 seconds.

4. The control method according to claim 1, characterized in that, Before the step of monitoring the real-time distance between a user and the television screen within a predetermined area in front of the television, the following steps are included: A safe distance threshold is set based on the parameters of the television set, wherein the parameters of the television set include at least the screen size, and the safe distance threshold is positively correlated with the screen size adjustment.

5. The control method according to claim 1, characterized in that, The steps for adjusting the emitted light state of a television screen to a diffused state include: The ambient light intensity around the television is collected in real time, and the scattering gradient is determined based on the ratio of the real-time distance to the safe distance threshold. The scattering parameters are adjusted by combining the scattering gradient with the ambient light intensity, so that the light emitted from the TV screen is switched to the corresponding scattering gradient.

6. The control method according to claim 5, characterized in that, The scattering gradient includes at least a first transmittance state, a second transmittance state, and a third transmittance state, wherein the transmittance of the first transmittance state is greater than that of the second transmittance state, and the transmittance of the second transmittance state is greater than that of the third transmittance state. The step of determining the scattering gradient based on the ratio of the real-time distance to the safe distance threshold includes: When the real-time distance is 70%-100% of the safe distance threshold, the scattering gradient is determined to be the first transmittance state; When the real-time distance is 40%-70% of the safe distance threshold, the scattering gradient is determined to be the second transmittance state; When the real-time distance is less than 40% of the safe distance threshold, the scattering gradient is determined to be the third transmittance state.

7. The control method according to claim 6, characterized in that, The control method further includes: If the real-time distance of a child user is detected to be less than the safe distance threshold for more than the warning time, the scattering gradient is gradually increased to the highest gradient and a voice prompt is given. If a child user is detected to have retreated beyond the safe distance threshold, the transparent state will be gradually restored according to the scattering gradient within a specified time.

8. The control method according to claim 1, characterized in that, The control method further includes: Record the number of times children view the screen at close range and the cumulative duration of close-range viewing, and regularly provide the data back to parents; If the number of close-range viewings in a single day exceeds the preset number or the cumulative viewing time exceeds the time limit, a vision protection warning message will be sent to the parents.

9. The control method according to claim 1, characterized in that, The control method further includes: Upon receiving an exemption command from a parent, the system will pause adjusting the emitted light from the TV screen for a preset exemption period, and automatically resume normal monitoring after the exemption period ends.

10. A control device for preventing myopia in children, characterized in that, The control device is either built into the television set or externally placed at the front of the television screen, and the control device includes: The monitoring module is used to monitor the real-time distance between the user and the TV screen within a predetermined area in front of the TV, and to identify whether the user is a child; The comparison module is used to receive the real-time distance after confirming that the user is a child, and compare the real-time distance with a preset safe distance threshold. The adjustment module is used to adjust the emitted light state of the TV screen to a scattering state to block the image if the real-time distance is less than the safe distance threshold; and to adjust the emitted light state of the TV screen to a transparent state to restore the image clarity if the real-time distance is greater than or equal to the safe distance threshold.

Images