Display system for preventing and treating myopia
By combining 3D display technology and defocusing technology, and utilizing the pinhole imaging principle of low-power lenses and polarizers, the myopia problem caused by traditional smart terminal display systems has been solved, achieving the effects of delaying the progression of myopia and reducing eye strain.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-23
- Publication Date
- 2026-04-10
AI Technical Summary
Long-term use of traditional smart terminal display systems can easily lead to myopia, and current technologies have not been able to effectively prevent and treat this.
By combining 3D display technology and defocusing technology, stereoscopic images are displayed behind the 3D display. The light is focused in front of the retina by using lenses with a lower diopter than conventional myopia glasses and the pinhole imaging principle of polarizing filters. The rotation of the polarizing filter adjusts the light transmittance and inhibits axial elongation.
It slows down the progression of myopia, avoids prolonged close-up work, reduces eye strain, and enables clear imaging and light intensity adjustment.
Smart Images
Figure CN121832113A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of display, more particularly, the present application relates to a display system for preventing myopia. BACKGROUND
[0002] At present, intelligent terminal has become an important platform for primary and secondary school students to participate in learning. When primary and secondary school students use intelligent terminal, their eyes will focus on the screen, and long-term use is easy to form myopia. In order to solve the above-mentioned disadvantages of the traditional intelligent terminal display system, the present application provides a display system for preventing myopia. The display system comprehensively utilizes 3D display technology, so that the teaching content of the intelligent terminal can be imaged at a relatively far position, avoiding the eyes of students focusing on the near place for a long time; in cooperation with the defocus technology, the system can also make the light focus in front of the retina, forming "myopia defocus", so as to inhibit the growth of eye axis and delay the deepening of myopia. SUMMARY
[0003] In order to solve the problem that the traditional intelligent terminal display screen is easy to make the viewer form myopia in the long-term use process, the present application provides a display system for preventing myopia.
[0004] The display system for preventing myopia comprises a 3D display and glasses.
[0005] The 3D display adopts a conventional setting, which sets the stereoscopic image as a positive parallax and displays it behind the 3D display screen.
[0006] The glasses comprise a lens, a first polarizer and a second polarizer.
[0007] The lens has a refractive power, and the absolute value of the refractive power of the lens is lower than the absolute value of the correct refractive power of the conventional myopia glasses of the user.
[0008] Supposing that the refractive power of the lens is -D1 and the correct refractive power of the conventional myopia glasses of the user is -D2, there is D1<D2; Supposing that the distance of the light group formed by the stereoscopic image and the human eye to the lens is L1, and the distance of the light group formed by the 3D display to the lens and the human eye is L2, there is L1>L2; The distance of the light group formed by the lens and the human eye to the retina is L3; when the human eye looks at the stereoscopic image, the focal length of the light group formed by the lens with the refractive power of -D1 and the human eye is F1, according to the Gauss formula, for the on-screen pixel, there is 1 / L2+1 / L4=1 / F1, wherein L4 is the image distance of the 3D display screen pixel, at this time, F1 should make L4<L3.
[0009] The first polarizer and the second polarizer comprise at least one small hole, which is arranged at the central axis position of the polarizer.
[0010] The second polarizer can rotate around the shaft.
[0011] The working principle of the present application is as follows: (1) Working principle of far distance The 3D display sets the stereoscopic image as positive parallax through positive parallax setting, and the stereoscopic image will be displayed behind the screen of the 3D display according to the principle of binocular parallax; (2) Principle of defocus technology Since the distance between the stereoscopic image and the optical group formed by the lens and the human eye is L1, and the distance between the 3D display and the optical group formed by the lens and the human eye is L2, then L1>L2; The distance from the optical group formed by the lens and the human eye to the retina is L3; when the human eye looks at the stereoscopic image, the focal length of the optical group formed by the lens and the human eye is F1, and according to the Gaussian formula, for the on-screen pixels, 1 / L2+1 / L4=1 / F1, where L4 is the pixel pitch of the 3D display screen, and at this time F1 makes L4<L3. Then the light emitted by the 3D display screen pixels converges before the retina and realizes defocus imaging; Further, if D1=D2, then when the human eye focuses on the stereoscopic image, the focal length of the optical group formed by the lens with a refractive power of -D2 and the human eye is F2, and when the human eye looks at the stereoscopic image, the stereoscopic image point at this position can form a clear image, L3=L4, according to the Gaussian imaging formula, 1 / L1+1 / L3=1 / F2. However, since the actual pixel position of the stereoscopic image is on the 3D display screen, the on-screen pixels have 1 / L2+1 / L4=1 / F2. Since L2<L1, then L4>L3, and the pixel light is actually focused behind the retina; According to the principle of myopia correction of the human eye, when the light emitted by the 3D display screen pixels converges before the retina and realizes defocus imaging, it helps to inhibit the growth of the eye axis and delay the deepening of myopia; on the contrary, when the light emitted by the 3D display screen pixels converges after the retina, it will lead to the growth of the eye axis and the deepening of myopia. Therefore, D1 must be smaller than D2; (3) Principle of pinhole technology Further, the first polarizer and the second polarizer at least include one through hole, which is arranged at the central axis position of the polarizer, and the second polarizer can rotate around the axis. The first polarizer and the second polarizer form a polarized aperture stop, which can make light pass through the small hole to form an image; and in the case of defocus imaging when the light emitted by the 3D display screen pixels converges before the retina, a clear image is formed based on the principle of pinhole imaging glasses; in addition, the polarized aperture stop has a certain blocking effect on other imaging light, and the blocking effect is related to the angle between the detection direction of the first polarizer and the second polarizer. By rotating the second polarizer, the light transmittance can be adjusted between 0 and 50%.
[0012] Therefore, based on the principle of defocus technology and the principle of pinhole imaging, the application can realize the function of traditional defocus lenses, thereby inhibiting the growth of the eye axis; in addition, on the basis of the function of traditional defocus lenses, the intensity of the defocus light beam can also be adjusted; finally, based on the principle of 3D display, the application can also display a stereoscopic image behind the screen of a 3D display, so that the viewer does not have to focus on a relatively close position for a long time during use, and the visual fatigue caused by binocular convergence disorder is avoided. Based on the above beneficial effects, the application can delay myopia deepening. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the application.
[0014] Figure 2 It is a lens structure schematic diagram of the application.
[0015] Figure 3 It is a defocus imaging optical path principle diagram of the application.
[0016] Figure 4 It is a pinhole imaging optical path principle diagram of the application.
[0017] Figure legend: 100-3D display; 200-glasses; 300-stereoscopic image; 211-lens; 212-first polarizer; 213-second polarizer; 214-pinhole; 110-on-screen pixel; 410-pupil; 420-lens; 400-eyeball.
[0018] It should be understood that the above drawings are only schematic, and the positions of the principal points of the light group and the like are not drawn to scale. DETAILED DESCRIPTION
[0019] Figure 1 It is a display system for preventing and treating myopia provided by the embodiment.
[0020] The display system for preventing and treating myopia comprises a 3D display 100 and glasses 200.
[0021] The 3D display 100 is set in a conventional manner, and a stereoscopic image 300 is set as a normal parallax and displayed behind the screen of the 3D display 100.
[0022] Please refer to Figure 2 The glasses 200 comprise a lens 211, a first polarizer 212 and a second polarizer 213.
[0023] The lens 211 has a refractive power, and the absolute value of the refractive power of the lens 211 is lower than the absolute value of the correct refractive power of the conventional myopia glasses of the user.
[0024] Specifically, the dioptric power-D1 of the lens 211 is -3, and the correct dioptric power-D2 of the user's conventional myopia glasses is -4, so D1<D2; Please refer to Figure 3 , the distance L1 between the stereoscopic image 300 and the optical group formed by the lens 211 and the human eye is 1000 mm, and the distance L2 between the 3D display 100 and the optical group formed by the lens 211 and the human eye is 400 mm, so L1>L2; The distance L3 from the optical group formed by the lens 211 and the human eye to the retina is 16.4 mm, when the human eye looks at the stereoscopic image 300, the focal length F1 of the optical group formed by the lens 211 and the human eye with a dioptric power of-D1 is 15.15 mm, according to the Gaussian formula, for the on-screen pixel 110, 1 / L2+1 / L4=1 / F1, wherein L4=15.75 mm is the image distance of the 3D display screen pixel, at this time F1=15.15 mm makes L4<L3.
[0025] The first polarizer 212 and the second polarizer 213 comprise a small hole 214, which is arranged at the central axis position of the polarizer.
[0026] The working principle of the present application is as follows: (1) Working principle of far distance Please refer to Figure 1 The 3D display 100 sets the stereoscopic image 300 as positive parallax through positive parallax setting, according to the binocular parallax principle, the stereoscopic image 300 will be displayed at 600 mm behind the screen of the 3D display 100; (2) Principle of defocus technology Please refer to Figure 3 Because the distance L1 between the stereoscopic image 300 and the optical group formed by the lens 211 and the human eye is 1000 mm, and the distance L2 between the 3D display 100 and the optical group formed by the lens 211 and the human eye is 400 mm, so L1>L2; The distance L3 from the optical group formed by the lens 211 and the human eye to the retina is 16.4 mm, when the human eye looks at the stereoscopic image 300, the focal length F1 of the optical group formed by the lens 211 and the human eye with a dioptric power of-D1 is 15.15 mm; The on-screen pixel 110 is shot to the eyeball 400 by the optical group, and is imaged through the pupil 410 and the lens 420. According to the Gaussian formula, for the on-screen pixel 110, 1 / L2+1 / L4=1 / F1, wherein L4=15.75 mm is the image distance of the 3D display screen pixel, at this time F1 makes L4<L3. Then the light emitted by the pixel of the screen of the 3D display 100 converges before the retina, and the defocus imaging is realized; Further, if D1 = D2, when the human eye focuses on the stereoscopic image 300, the lens 420 forms an optical group with the lens 211 with a diopter of -D2, and the focal length of this optical group is F2. When the human eye looks at the stereoscopic image 300, the object point of the stereoscopic image 300 at this position can form a correct clear image, and L3 = L4. According to the Gaussian imaging formula, 1 / L1 + 1 / L3 = 1 / F2. However, since the actual pixel position of the stereoscopic image 300 is on the 3D display screen, for the pixel 110 on the screen, 1 / L2 + 1 / L4 = 1 / F2. Because L2 < L1, then L4 > L3, and the pixel light actually focuses behind the retina; According to the principle of human eye myopia correction, when the light emitted by the pixels on the screen of the 3D display 100 converges in front of the retina and forms a defocused image, it helps to inhibit the growth of the eye axis and delay the deepening of myopia; on the contrary, when the light emitted by the pixels on the screen of the 3D display 100 converges behind the retina, it will cause the growth of the eye axis and the deepening of myopia. Therefore, D1 must be less than D2; (3) Principle of the pinhole technique Please refer to Figure 4 , the first polarizer 212 and the second polarizer 213 each contain at least 1 through hole, which is set at the central axis position of the polarizer, and the second polarizer 213 can rotate around the axis. Then the first polarizer 212 and the second polarizer 213 form a polarization aperture diaphragm.
[0027] The light of the pixel 110 on the screen is directed towards the eyeball 400 and forms an image through the pupil 410 and the lens 420. In the polarization direction orthogonal to the polarization direction of the first polarizer analyzer, the light passes through the pinhole 214 for imaging; and in the case of defocused imaging where the light emitted by the pixels on the screen of the 3D display 100 converges in front of the retina, since the light beam is no longer restricted by the pupil 410, a clear image is formed based on the principle of pinhole imaging glasses; in addition, this polarization aperture diaphragm has a certain blocking effect on the light in the polarization direction of the first polarizer analyzer, and its blocking effect is related to the included angle between the polarization directions of the first polarizer 212 and the second polarizer 213. By rotating the second polarizer 213, the natural light transmittance can be adjusted between 0 and 50%. Specifically, when the polarization directions of the first polarizer 212 and the second polarizer 213 are orthogonal, the natural light transmittance is 0; when the polarization directions of the first polarizer 212 and the second polarizer 213 are parallel, the natural light transmittance is 50%.
[0028] Therefore, based on the principles of defocus technology and pinhole imaging, this invention can achieve the same function as traditional defocus lenses, thereby inhibiting axial elongation. Furthermore, in addition to the functions of traditional defocus lenses, it can also adjust the intensity of the defocused beam. Finally, based on the principle of 3D display, it can also display stereoscopic images 300 behind the screen of the 3D display 100, so that viewers do not need to focus on a close position for extended periods during use, and avoid eye strain caused by binocular convergence disorder. Based on the above beneficial effects, this invention can slow down the progression of myopia.
Claims
1. A display system for preventing and treating myopia, characterized in that: The display system for preventing and treating myopia includes a 3D display and glasses; The 3D display uses a conventional setup, which sets the stereoscopic image to orthographic parallax and displays it behind the 3D display screen; The eyeglasses consist of lenses, a first polarizing filter, and a second polarizing filter; The lens has a refractive power, and the absolute value of the lens's refractive power is lower than the absolute value of the correct refractive power of the user's regular myopia glasses; Let the refractive power of the lens be -D1, and the correct refractive power of the user's regular myopia glasses be -D2. Then, D1 <D2; Let L1 be the distance from the 3D image to the light group formed by the lens and the human eye, and L2 be the distance from the 3D display to the light group formed by the lens and the human eye. Then L1 > L2. The distance from the lens and the optical group formed by the human eye to the retina is L3. When the human eye looks at the stereoscopic image, the focal length of the optical group formed by the lens with a refractive power of -D1 and the human eye is F1. According to the Gaussian formula, for a pixel on the screen, 1 / L2 + 1 / L4 = 1 / F1, where L4 is the image distance of the pixel on the 3D display screen. At this time, F1 should make L4 equal to L2. <L3; The first polarizer and the second polarizer each include at least one small hole, which is located at the central axis of the polarizer. The second polarizer can rotate around an axis.