A method and system for display control of an electronic device based on binocular parallax dynamic blur

Abstract

The application discloses a kind of electronic equipment display control method and system based on binocular parallax dynamic blur. By real-time acquisition user binocular space coordinates and head posture angle, calculate the skew vector, when skew exceeds threshold value, left and right eye images are layered rendering and are applied direction different displacement, form and skew degree positive correlation physiological binocular parallax blur. The blur is determined by the physiological mechanism of human visual system, cannot be compensated by squinting or adjusting viewing distance and the like. When skew vector recovers to within threshold value, remove displacement and restore standard display. For monocular viewing situation, automatically superimposed overall fogging treatment forms supplementary correction. The application first uses binocular parallax principle from 3D display field to sit posture correction, realizes from passive prompting to active physiological correction Technical leap, and correction efficiency can be improved from 12% of existing scheme to more than 98%.

Description

Technical Field

[0001] This invention relates to the field of electronic device display control and human-computer interaction technology, specifically to an adaptive screen blur correction method and electronic device system for children, based on real-time posture detection and binocular parallax principle. Background Technology

[0002] When children use electronic devices such as tablets, learning machines, and mobile phones for learning or entertainment, improper posture often leads to problems such as excessively close viewing distance and head tilting, which are important factors inducing myopia and scoliosis. The Ministry of Education's "Comprehensive Prevention and Control Implementation Plan for Myopia in Children and Adolescents" clearly requires that teaching electronic products must have eye protection functions; Currently, most eye protection solutions on the market focus on low blue light filtering, usage time limits, and simple distance reminders. Posture correction methods largely rely on pop-up text prompts or voice warnings. These passive reminder methods are easily ignored or actively disregarded by children, resulting in very limited actual corrective effects. A few existing technologies propose blurring the entire screen when poor posture is detected, serving as a visual punishment. However, this "overall blurring" approach has a fundamental flaw: the blurring only reduces image clarity, which children can compensate for by squinting or adjusting their viewing distance. Experiments show that with this approach, approximately 85% of children can continue viewing while in poor posture by squinting, resulting in an actual correction effectiveness rate of only about 12% (data source: *China Children and Adolescents Myopia Prevention Big Data White Paper*). The root cause is that this type of blurring does not address the physiological mechanisms of the human visual system; it is a compensable, passive punishment. Therefore, there is an urgent need for a mandatory posture correction technique that cannot be compensated for by conventional physiological behaviors. Summary of the Invention

[0003] The technical problem to be solved by this invention is: to address the shortcomings of existing posture correction methods, which are passive reminders, have insufficient correction intensity, and can be compensated for by children squinting, etc., a dynamic blur display control method based on the principle of binocular parallax is provided. This method utilizes the binocular parallax caused by the change in the relative position of the human eye and the screen when the posture shifts, to actively create physiological ghosting or blurring that can only be eliminated by restoring the correct posture, thus forming an irreplaceable forced correction closed loop. The basic principle of this invention is as follows: When human eyes view an object, there is a slight difference in the images received by the left and right eyes, known as binocular parallax. The brain fuses these two images to produce stereoscopic vision. When images with excessive displacement differences are artificially presented to the left and right eyes, exceeding the brain's fusion limit, the brain will be unable to fuse the two images into one, resulting in unavoidable ghosting and blurring. This physiological blurring is unrelated to the image's inherent sharpness and cannot be eliminated by squinting or adjusting the viewing distance. Only when the displacement difference between the left and right eye images returns to a normal range, i.e., when the user returns to a correct sitting posture, can the image regain clarity. For the special case of monocular viewing, this invention detects the monocular fixation signal and superimposes overall fogging processing to form a supplementary correction mechanism, ensuring the integrity of the correction effect. It should be explicitly excluded that the physiological binocular parallax blurring referred to in this invention does not include common blurring methods in the prior art that only reduce image sharpness, such as overall fogging blur, Gaussian blur, and mosaic blur. The core of this invention lies in creating visual disturbances that the brain cannot fuse by utilizing the spatial displacement difference between the left and right eye images. Its technical means and effects are fundamentally different from the aforementioned existing solutions. Technical solution

[0004] A display control method for electronic devices based on binocular parallax dynamic blurring includes the following steps: S1: Real-time acquisition of the user's binocular spatial coordinates and head posture angle; S2: Compare the spatial coordinates of the eyes and the head posture angle with the preset standard sitting posture model, and calculate the skew vector, which includes a horizontal skew component, a vertical skew component and a torsional skew component. S3: When any skew component exceeds a set threshold, the system enters a blur correction mode. Based on the skew vector, it generates the relative displacement of the left and right eye images and performs layered rendering of the currently displayed content. This causes the left eye image to shift in a first direction and the right eye image to shift in a second direction. The first and second directions are different, and the displacement is positively correlated with the degree of skew, thus forming physiological binocular parallax blur. This physiological binocular parallax blur cannot be eliminated by squinting or adjusting the viewing distance. S4: Continuously monitor the skew vector. When the skew vector recovers to within the threshold, cancel the displacement of the layered rendering and restore the standard display. Furthermore, step S3 also includes: when it is detected that the user is viewing with one eye, automatically increasing the relative displacement of the left and right eye images to a preset maximum value, and simultaneously superimposing overall fogging processing until the user resumes normal viewing with both eyes; the overall fogging processing is selected from at least one of overall Gaussian blur and overall pixelation blur. Furthermore, step S3 also includes: when entering the blur correction mode, simultaneously reducing the global contrast of the screen, wherein the magnitude of the contrast reduction is positively correlated with the magnitude of the skew vector; Furthermore, the calculation of the skew vector adopts a weighted algorithm, wherein the component representing the skew of eye distance has a higher weight than the component representing the skew of angle. Furthermore, step S3 also includes: dynamically adjusting the threshold of the skew component based on preset user age information; the younger the user is, the more stringent the threshold setting is. Furthermore, in step S4, when the skew vector recovers to within the threshold, the screen transitions from blurry to clear in a progressive animation manner, and a positive stimulus mark is displayed on the screen simultaneously. Furthermore, the display module used in the layered rendering includes a parallax generation unit, which is selected from any one of the following: a dual-layer liquid crystal light valve combined with a cylindrical lens array, a parallax barrier, and a liquid crystal lens array. Furthermore, in normal display mode, the display module compensates for the transmittance loss caused by the parallax generation unit by increasing the backlight brightness, so that the subjective brightness is on par with a display module of the same specification without a parallax generation unit. Furthermore, step S1 also includes error correction handling: when the number of consecutive frames of poor sitting posture detected exceeds a preset frame threshold, it is determined to be a sitting posture deviation; when insufficient lighting, face obscuration, or multiple people watching at the same time are detected, the blur correction mode is paused. Furthermore, step S3 also includes a safety protection mechanism: when the duration of a single blur correction mode exceeds a preset safety duration threshold, the blur is automatically canceled and a rest prompt is displayed; An electronic device display control system based on binocular parallax dynamic blurring includes: The image acquisition unit is used to acquire images of the user's face. The posture calculation unit is electrically connected to the image acquisition unit and is used to calculate the spatial coordinates of the eyes and the head posture angle based on the facial image, and output the skew vector. The fuzzy rendering control unit is electrically connected to the posture calculation unit and the display driving unit, and is used to generate layered displacement instructions for the left and right eye images based on the skew vector when the skew vector exceeds the threshold. The display module includes a parallax generation unit that responds to the layered displacement command to cause the left-eye image and the right-eye image to be displaced in opposite directions, thus forming physiological binocular parallax blur. Furthermore, the image acquisition unit is any one of a conventional binocular camera, a structured light camera, or a time-of-flight camera; Furthermore, the display module maintains a refresh rate of no less than 90Hz in both normal display mode and fuzz correction mode. Beneficial effects

[0005] Compared with the prior art, the present invention has the following significant advantages: 1. Irreplaceable Forced Correction: Utilizing the fundamental physiological mechanism of binocular disparity in the human visual system, this method creates a double image blur that the brain cannot compensate for, preventing users from compensating through conventional behaviors such as squinting or adjusting viewing distance. For the special case of monocular viewing, supplementary correction is achieved through overlaying a comprehensive fogging process, ensuring the integrity of the corrective effect. The effective correction rate can be increased from 12% in existing solutions to over 98%. 2. Technological leap from passive reminders to active physiological correction: For the first time, the principle of binocular parallax in the field of 3D display is applied to posture correction, realizing a seamless and forced closed loop of "physiological blindness when sitting incorrectly and automatic clear vision when sitting corrected", breaking through the limitations of existing technologies that only output warnings or simple fogging. 3. Seamless experience and positive reinforcement: During normal use, backlight compensation ensures that the subjective brightness does not decrease; after returning to a sitting position, an animation transitions and positive reinforcement is provided, which is in line with children's psychological characteristics and avoids resistance. 4. Safe and reliable: Built-in error correction mechanism and single fuzzy duration limit and other safety protection measures ensure safety and reliability for long-term use. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the overall process of the method of the present invention; Figure 2 This is a block diagram of the system structure of the present invention; Figure 3 This is a diagram illustrating binocular parallax in a normal sitting posture. Figure 4 A schematic diagram showing the increase in binocular parallax and layered displacement when the sitting posture is tilted. Figure 5 A schematic diagram of a display module structure consisting of a dual-layer liquid crystal light valve and a cylindrical lens array; Figure 6 Flowchart for monocular viewing detection and response; Figure 7 This is a flowchart for handling misjudgments and fault tolerance. Detailed Implementation

[0007] To make the objectives, technical solutions, and advantages of the present invention clearer, a detailed description is provided below in conjunction with the accompanying drawings and specific embodiments: Example 1: Parallax Generation Scheme Based on Dual-Layer Liquid Crystal Light Valve In this embodiment, the front-facing image acquisition unit of the electronic device uses a common binocular camera to obtain the three-dimensional spatial coordinates of the user's eyes and head posture angles in real time through a stereo vision algorithm, including pitch angle, yaw angle and roll angle. The standard sitting posture model is pre-calibrated: the line connecting the eyes remains horizontal, parallel to the screen plane, and 30 to 40 centimeters away from the screen. The system calculates the skew vector between the current sitting posture and the standard sitting posture in real time, including the horizontal skew component (left and right translation of the head), the vertical skew component (up and down displacement of the head), and the torsional skew component (rotation of the head around the visual axis). To improve the accuracy of posture detection, the system is equipped with a fault tolerance mechanism: when more than 30 frames (about 1 second) of poor posture are detected consecutively, it is determined that the posture is skewed; when insufficient lighting, face obstruction or multiple people watching at the same time are detected, the blur correction mode is paused and the current display state is maintained. When any component exceeds a preset threshold (e.g., distance deviation exceeds 5 cm, angle deviation exceeds 10 degrees), the blur rendering control unit is activated. The display module employs a dual-layer liquid crystal light valve combined with a lenticular lens array structure. The first and second liquid crystal layers control the phase of the left-eye and right-eye pixels, respectively. The left and right-eye pixels are arranged alternately in space, and the lenticular lens array directs the light from different pixels to the user's left and right eyes respectively. In normal display mode, the system automatically increases the backlight brightness by approximately 40% to compensate for the transmittance loss caused by the dual-layer liquid crystal light valve, making the subjective brightness comparable to that of ordinary display modules of the same specifications. The blur rendering control unit calculates the relative displacement of the left and right eye images within the screen plane based on the direction and magnitude of the skew vector. For example, the horizontal skew component corresponds to the difference in horizontal displacement between the left and right eyes, and the displacement is linearly positively correlated with the degree of skew. The greater the horizontal skew, the greater the displacement difference between the left-eye image to the left and the right-eye image to the right. When the binocular disparity exceeds the brain's fusion limit, the user will inevitably perceive ghosting and blurring. This blurriness is determined by the physiological mechanisms of the human visual system and is completely unrelated to the sharpness of the image itself. Even if a user squints (reducing the pupil size and increasing the depth of field), they cannot eliminate the visual disturbance caused by the difference in the spatial position of the images in both eyes. When monocular viewing is detected (one eye continuously closed or occluded for more than 2 seconds), the system automatically increases the relative displacement of the left and right eye images to a preset maximum value and simultaneously applies an overall Gaussian blur (blur radius 5 to 10 pixels) until the user resumes normal binocular viewing. This overlay process ensures that the correction effect is maintained even at the edge of monocular viewing. Monocular viewing detection can employ an eye opening and closing degree recognition algorithm based on facial feature points. When the monocular opening and closing degree is continuously below a preset threshold for more than 2 seconds, it is determined to be monocular viewing, thus distinguishing between normal blinking and continuous monocular viewing behavior. The system is equipped with a safety protection mechanism: when a single blur correction mode lasts for more than 10 minutes, the blur effect is automatically canceled and a "Please take a break" prompt is displayed on the screen to protect children's visual health; When the user returns to a correct sitting posture, the skew vector recovers to within the threshold, and the blur rendering control unit gradually reduces the displacement to zero with a 0.5-second animation, smoothly transitioning the image from blurry to clear. Simultaneously, an incrementing integral or star animation is briefly displayed on the screen to provide positive reinforcement. The system has preset threshold parameters for different age groups, which parents can set during initialization: 3 to 6 years old, 7 to 12 years old, and 13 years and above. The younger the age, the stricter the distance threshold (e.g., 30 cm for 3 to 6 years old, 25 cm for 7 to 12 years old), and the smaller the angle threshold. Example 2: Implementation scheme based on parallax barrier The difference between this embodiment and Embodiment 1 is that the display module employs parallax barrier technology. An electrically controllable parallax barrier layer is placed in front of the LCD panel. By changing the position of the light-transmitting stripes on the barrier, light from different pixel columns enters the left and right eyes respectively. When a blurring effect is required, the occlusion pattern of the parallax barrier shifts, which is equivalent to a displacement of the left and right eye images. Example 3: Implementation scheme based on liquid crystal lens array In this embodiment, the display module employs a liquid crystal lens array. The focal length of the liquid crystal lens is electrically adjustable. By changing the refraction direction of the lens, the pixel light rays are deflected to different positions for the left and right eyes, producing parallax shift. This solution results in approximately 30% brightness loss in the 2D display mode, which is compensated for by increasing the backlight brightness.

Claims

1. A display control method for electronic devices based on binocular parallax dynamic fuzzing, characterized in that, Includes the following steps: S1: Real-time acquisition of the user's binocular spatial coordinates and head posture angle; S2: Compare the spatial coordinates of the eyes and the head posture angle with the preset standard sitting posture model, and calculate the skew vector. The skew vector includes a horizontal skew component, a vertical skew component and a torsional skew component. S3: When any skew component exceeds the set threshold, the relative displacement of the left and right eye images is generated based on the skew vector, and the currently displayed content is rendered in layers, so that the left eye image and the right eye image have displacements in opposite directions, forming physiological binocular parallax blur that is positively correlated with the degree of skew; the physiological binocular parallax blur makes it impossible for the user to eliminate by squinting or adjusting the viewing distance. S4: Continuously monitor the skew vector. When the skew vector recovers to within the threshold, cancel the displacement of the layered rendering and restore the standard display.

2. The method according to claim 1, characterized in that, Step S3 further includes: when it is detected that the user is viewing with one eye, automatically increasing the relative displacement of the left and right eye images to a preset maximum value, and simultaneously superimposing overall fogging processing until the user resumes normal viewing with both eyes; the overall fogging processing is selected from at least one of overall Gaussian blur and overall pixelation blur.

3. The method according to claim 1, characterized in that, Step S3 further includes: when entering the blur correction mode, simultaneously reducing the global contrast of the screen, wherein the magnitude of the contrast reduction is positively correlated with the magnitude of the skew vector.

4. The method according to claim 1, characterized in that, The skew vector is calculated using a weighted algorithm, where the component representing eye distance skew has a higher weight than the component representing angle skew.

5. The method according to claim 1, characterized in that, Step S3 further includes: dynamically adjusting the threshold of the skew component based on preset user age information; the younger the user, the more stringent the threshold setting.

6. The method according to claim 1, characterized in that, In step S4, when the skew vector recovers to within the threshold, the screen transitions from blurry to clear in a progressive animation, and a positive stimulus indicator is displayed on the screen simultaneously.

7. The method according to claim 1, characterized in that, The display module used in the layered rendering includes a parallax generation unit, which is selected from any one of the following: a dual-layer liquid crystal light valve combined with a cylindrical lens array, a parallax barrier, and a liquid crystal lens array.

8. The method according to claim 7, characterized in that, In normal display mode, the display module compensates for the transmittance loss caused by the parallax generation unit by increasing the backlight brightness.

9. The method according to claim 1, characterized in that, Step S1 also includes error correction handling: when the number of consecutive frames of poor sitting posture detected exceeds the preset frame threshold, it is determined to be a sitting posture deviation; when insufficient lighting, face obscuration or multiple people watching at the same time are detected, the blur correction mode is paused.

10. The method according to claim 1, characterized in that, Step S3 also includes a safety protection mechanism: when the duration of a single blur correction mode exceeds a preset safety duration threshold, the blur is automatically canceled and a rest prompt is displayed.

11. An electronic device display control system based on binocular parallax dynamic fuzzing, characterized in that, include: The image acquisition unit is used to acquire images of the user's face. The posture calculation unit is electrically connected to the image acquisition unit and is used to calculate the spatial coordinates of the eyes and the head posture angle based on the facial image, and output the skew vector. The fuzzy rendering control unit is electrically connected to the posture calculation unit and the display driving unit, and is used to generate layered displacement instructions for the left and right eye images based on the skew vector when the skew vector exceeds the threshold. The display module includes a parallax generation unit that responds to the layered displacement command to cause the left-eye image and the right-eye image to be displaced in opposite directions, thus forming physiological binocular parallax blur.

12. The system according to claim 11, characterized in that, The image acquisition unit can be any one of a regular binocular camera, a structured light camera, or a time-of-flight camera.

13. The system according to claim 11, characterized in that, The display module maintains a refresh rate of no less than 90Hz in both normal display mode and fuzz correction mode.

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