Magnifying display device

Abstract

To provide a magnifying display device that can zoom out an image of a nearby object, and can reduce a frequency of using the eyes for focusing on a short-distance object for a long period.SOLUTION: A magnifying display device includes a magnifying reflector module 1 formed on a load frame bracket 2. The magnifying reflector module comprises a reflecting sheet 11 that receives and reflects a projection image, and a magnifying sheet 12 that receives and magnifies a reflected image from the reflecting sheet. The reflecting sheet is a double-curved convex mirror or the magnifying sheet is a double-curved concave mirror in order to cause defocusing in the vertical direction and display the reflected image at a vertical virtual image distance farther than a horizontal virtual image distance. As a result, the reflected image is projected on the eyeballs to form a defocused image in a line-of-sight image area in the vertical direction and form a focused image in a line-of-sight image area in the horizontal direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a magnifying display device, and more particularly to a magnifying display device capable of correcting, controlling or slowing the progression of myopia. [Background technology]

[0002] With the spread of electronic products such as smartphones and tablets, the increasing prevalence of myopia among children has become a problem faced by many countries. In addition to genetics, using the eyes to focus on close objects for long periods of time is also one of the main causes of myopia.

[0003] Referring to Figure 1, there are many ways to control myopia, but one method that is generally considered to be effective is the use of eyeglasses that correct peripheral blur. The central curvature of the eyeglass lens 91 (myopic peripheral blur lens) is tailored according to the wearer's visual acuity so that the intermediate line of sight is focused on the retina (i.e., focal area 921) and the wearer sees clearly. The microstructure of the peripheral region of the lens creates a smaller curvature, which results in a longer focal length and, as a result, the image 93 of the line of sight comes into focus earlier because the line of sight focuses in front of the retina (i.e., in the peripheral defocused region 922). If the defocused image is around the peripheral area of ​​the lens, only the image in the center of the lens will be clear, the wearer's vision will be more focused and the defocused image in the periphery will not affect the wearer's life.

[0004] The effect of myopic peripheral blur on the prevention and control of myopia has been derived from experiments on animals (great apes) with good results. Medical research has demonstrated that there is a retinal focusing phenomenon: when the visual field is focused in front of the retina, the retina tends to move forward, thereby preventing axial growth, which is the main physiological change that results in permanent myopia.

[0005] Another method is to wear corrective lenses. Corrective lenses can use a similar principle to slow the progression of myopia. Hard contact lenses are worn at night while sleeping, and the shape of the lens is used to apply pressure to the central cornea, causing a temporary physical deformation of the central cornea. Clear vision lasts for 1-2 days after the wearer removes their hard contact lenses during the day. The reason why shaping lenses not only provide clear vision for a short period of time, but also slow the progression of myopia, is because they only reshape the central part of the cornea, while the peripheral cornea continues to maintain its original myopic state, so that peripheral vision is focused in front of the retina.

[0006] Corrective corneal lenses have the effect of slowing down the progression of myopia, which is indirect evidence that they also have the effect of slowing down the progression of myopia on peripheral blur caused by myopia. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention provides a magnifying display device that can zoom out the image of a nearby object, reducing the use of the eyes to focus on a nearby object for a long time, and when the magnifying device is used, the vertical defocusing effect is exerted, which retards the growth of the eye axis and achieves the prevention and control of myopia. [Means for solving the problem]

[0008] The magnified display of the present invention is not a near-ocular display, but instead utilizes vertical defocus, whereby half of the line of sight is focused on the retina and the other half is focused in front of the retina, partially achieving the effect of vertical defocus and allowing the vertical virtual image distance of the magnified display to be significantly longer than the horizontal virtual image distance of the magnified display. When the eye focuses on a horizontal virtual image, the line of sight image is focused on the retina, and when the eye focuses on a vertical virtual image, the vertical line of sight image is focused in front of the retina.

[0009] The present invention is directed to a magnified display device that includes a magnified reflector module configured on a load frame bracket. The magnifying reflector module includes a reflecting sheet and a magnifying sheet. The reflective sheet is configured to receive the projected image and thereafter reflect the projected image. The magnifying sheet is configured to receive the reflected image from the reflective sheet and thereafter magnify it. The reflecting sheet is a double curved convex mirror or the magnifying sheet is a double curved concave mirror so as to provide vertical defocus so that the reflected image can be displayed at a vertical virtual image distance greater than the horizontal virtual image distance. The reflected image is projected onto the eyeball, forming a defocused image in the vertical line-of-sight image field and a focused image in the horizontal line-of-sight image field.

[0010] In some embodiments, the horizontal virtual image distance at which the reflector sheet and the magnifier sheet successively reflect the projected image is defined as VIDh. The vertical virtual image distance at which the reflecting sheet and the magnifying sheet successively reflect the projected image is defined as VIDv. The degree of astigmatism of the projected image between the vertical and horizontal directions is defined as α. TIFF2024177027000002.tif9150

[0011] In some embodiments, the nip angle between the reflective sheet and the magnifying sheet is in the range of 24° to 32°.

[0012] In some embodiments, the height ratio of the magnifying sheet to the reflecting sheet is in the range of 1:1.2 to 1:1.5.

[0013] In some embodiments, the magnifying sheet is a doubly curved concave mirror, the vertical curvature of the magnifying sheet is greater than the horizontal curvature, and the reflective sheet here is a plane or convex mirror.

[0014] In some embodiments, the reflective sheet is a double curved convex mirror. The reflective sheet is provided with a smaller vertical curvature than the horizontal curvature. The magnifying sheet here is a concave mirror.

[0015] In some embodiments, the magnifying reflector module further includes an inversion frame. One end of the inversion frame is connected to the upper edge of the reflector sheet, and the other end of the inversion frame is connected to the lower edge of the magnifying sheet.

[0016] In some embodiments, the load frame bracket includes an armset and a fixed base. One end of the armset is connected to the magnifying mirror module and the other end of the armset is connected to a fixed base.

[0017] In some embodiments, the arm set further comprises a first arm, a second arm, a first shaft, and a second shaft. One end of the first arm is connected to a fixed base, and the other end of the first arm is connected to the first shaft. One end of the second arm is connected to the second shaft, and the other end of the second arm is connected to the first shaft.

[0018] In some embodiments, the armset and fixed base include a third shaft therebetween. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2 is a schematic diagram of a peripheral blur control lens. [Diagram 2] FIG. 2 is a schematic diagram of a structure of a magnified display device according to some embodiments of the present invention. [Figure 3a] FIG. 2 is a schematic diagram of a magnification display device in use. [Figure 3b] FIG. 2 is a schematic diagram of a magnification display device in use. [Figure 4] FIG. 2 is a schematic diagram of the optical path of the magnification display device. [Diagram 5] FIG. 2 is a schematic diagram of the angular arrangement of the magnifying sheet and the reflecting sheet. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] In order to more clearly explain the embodiments, structures and effects of the present invention, the embodiments are accompanied with the following drawings.

[0021] 2 to 5, the present invention provides an embodiment of a magnifying display device including a magnifying reflector module 1 arranged on a load frame bracket 2.

[0022] The load frame bracket 2 includes an arm set 21 and a fixed base 22 . The arm set 21 and the fixed base 22 are connected by a third shaft 215 . One end of the armset 21 is connected to the magnifying reflector module 1 , and the other end of the armset 21 is connected to a fixed base 22 . The arm set 21 includes a first arm 211 , a second arm 212 , a first shaft 213 , and a second shaft 214 . One end of the first arm 211 is connected to the fixed base 22 , and the other end of the first arm 211 is connected to the first shaft 213 . One end of the second arm 212 is connected to the second shaft 214, and the other end of the second arm 212 is connected to the first shaft 213, and the second shaft 214 can be connected to the magnifying mirror module 1.

[0023] The magnifying mirror module 1 includes a reflective sheet 11 , a magnifying sheet 12 and an inverting frame 13 . One end of the inversion frame 13 is connected to the upper edge of the reflection sheet 11 , and the other end of the inversion frame 13 is connected to the lower edge of the magnifying sheet 12 . In some embodiments, the reflective sheet 11 serves to receive the projected image and then reflect the projected image. In some embodiments, the magnifying sheet 12 serves to receive and display the reflected image from the reflecting sheet 11 and then magnify the reflected image.

[0024] In some embodiments, the reflective sheet 11 is a double curved convex mirror, where the vertical curvature of the reflective sheet 11 is less than the horizontal curvature of the reflective sheet 11, and the magnifying sheet 12 here is a concave mirror. In some embodiments, the magnifying sheet 12 is a double curved concave mirror, the vertical curvature of the magnifying sheet 12 is greater than the horizontal curvature of the magnifying sheet 12, and the reflective sheet 11 here is a flat mirror or a concave mirror, which can project a reflected image onto the eye to form a defocused image in the vertical line of sight image area, and can project a reflected image onto the eye to form a focused image in the horizontal line of sight image area. In the description of the present invention, as shown in Fig. 3a and Fig. 3b, the magnifying sheet 12, a double curved concave mirror is taken as an example.

[0025] The double curvature mentioned above means that the curvature along the vertical axis 15 and the curvature along the vertical axis 6 are individually defined for the user, and reflected images that are collinear with (or close to) the horizontal axis are focused on the retina 32. Thus, half of the reflected image forms line-of-sight image 33 in vitreous 34 and is focused on retina 32, and the other half is focused in front of retina 32. In other words, a portion of magnifying sheet 12 achieves a vertical defocusing effect.

[0026] The vertical defocus mentioned above means that the virtual image distance of the reflected image on the vertical axis 15 is significantly greater than the virtual image distance of the reflected image on the horizontal axis 16 . When the eye is focused at the virtual image distance on the horizontal axis 16, the gaze image 331 focuses on the retina 32 to form a focused image (as shown in FIG. 3a), and the gaze image 311 on the vertical axis 15 at the imaging position of the vitreous 34 (vertical gaze image area 31) focuses in front of the retina 32 to form a defocused image (as shown in FIG. 3b).

[0027] The methods by which the human eye adjusts the formation of an object image can be divided into convergence reflex and crystal adjustment. Due to the binocular convergence effect, the human eyes produce a single image for visual impression. When the eyes meet, the lines of sight of the two eyes form a nip angle. When observing a distant object, the nip angle of convergence between the eyes becomes smaller. When observing a nearby object, the convergence nip angle between the eyes becomes larger. Crystal accommodation is the individual focusing adjustment of the crystals of both eyes. When viewing distant objects, the crystals become thinner, and when viewing close objects, the crystals become thicker, allowing lines of sight at different distances to be focused on the retina 32. The convergence reflection and crystal adjustment occur simultaneously. Typically, the crystal adjusts the focal length of the image depending on the convergence nip angle. Since the eyes are at different horizontal positions, the convergence reflex is related to horizontal visual distance only, and thus the horizontal gaze image is focused on the retina 32 .

[0028] See Figure 4. When the magnifying sheet 12 is a concave mirror and the reflecting sheet 12 is a convex mirror, the calculation formula for imaging zoom-out is as follows:

[0029] The equation for the virtual image formation of the magnifying sheet 12 follows the concave mirror imaging principle: TIFF2024177027000003.tif10150

[0030] where f1 is the focal length, q1 is the image distance, and p1 is the object distance.

[0031] The imaging equation of the reflecting sheet 11 follows the convex mirror imaging principle. TIFF2024177027000004.tif10150

[0032] where f2 is the focal length, q2 is the object distance, and p1 is the image distance. where p1=y+q2 and p2=x.

[0033] If the reflecting sheet 12 is a plane mirror, f2 is ∞ and the equation for the virtual image distance is: TIFF2024177027000005.tif10150

[0034] The image distance q1 is calculated using the horizontal curvature of the focal length f2 of the reflecting sheet 11 and the focal length f1 of the magnifying sheet 12, and is equal to the horizontal virtual image distance VIDh. The image distance q1 is calculated using the vertical curvature of the focal length f2 of the reflecting sheet 11 and the focal length f1 of the magnifying sheet 12, and is equal to the vertical virtual image distance VIDv, i.e., the distance between the line of sight image area 31 and the retina 32 in the vertical direction.

[0035] The vertical line-of-sight image area 31 of the magnified display is focused in front of the retina 32, rather than on it. If the vertical line-of-sight image area 31 is too far from the retina 32, the image entering the eye will be blurred vertically and horizontal lines will be blurred (as with astigmatism), so there is only a limited distance away from the horizontal focal distance to maintain visual quality, but the distance must be large enough to produce the vertical defocus effect.

[0036] To measure the degree of astigmatism caused by the difference in focal length between the vertical and horizontal axes, the following value α is generally used: TIFF2024177027000006.tif9150

[0037] Wherein, VIDh is the horizontal virtual image distance (meters), VIDv is the vertical virtual image distance (meters), and VIDh and VIDv can be calculated using the zoom-out calculation formula:

[0038] In an optical system, if α≦0.13, essentially no astigmatism is observed, but the vertical defocus distance is relatively short (the distance between the vertical line of sight and the retina 32), and the focus is achieved approximately 0.07 mm in front of the retina 32. α may be set to satisfy the following formula: 0.07≦α≦0.13

[0039] The present invention provides an embodiment in which the value of VIDv is greater than VIDh, thereby providing a vertical magnification greater than the horizontal magnification. At this point, the image of the object in the mirror is pulled up, causing aspect ratio distortion. To avoid the aspect ratio distortion problem, the nip angle between the magnifying sheet 12 and the reflecting sheet 11 needs to be adjusted. In some embodiments, the larger the nip angle between the magnifying sheet 12 and the reflecting sheet 11, the smaller the aspect ratio of the image in the mirror, and vice versa. Typically, the nip angle between the reflecting sheet 11 and the magnifying sheet 12 is in the range of 24° to 32° (see FIG. 5).

[0040] The aspect ratio distortion in the mirror can be compensated for by adjusting the nip angle a between the magnifying sheet 12 and the reflective sheet 11 to be larger; however, as the nip angle between the magnifying sheet 12 and the reflective sheet 11 becomes larger, the height of the reflective sheet 11 observed through the magnifying sheet 12 becomes smaller, resulting in wasted vertical field of view, so the ratio of the height of the reflective sheet 11 to the height of the magnifying sheet 12 must be increased, and this ratio is generally within the range of 1:1.2 to 1:1.5.

Claims

1. A magnification display device, A magnifying reflector module comprising a reflective sheet and a magnifying sheet, the reflective sheet is configured to receive a projected image and thereafter reflect the projected image; the magnifying sheet is configured to receive and thereafter magnify the reflected image from the reflecting sheet; A magnifying mirror module; A load frame bracket, the magnifying mirror module being attached to the load frame bracket. In a magnifying display device comprising: To provide vertical defocus, the reflective sheet is a double-curved convex mirror or the magnifying sheet is a double-curved concave mirror; The reflected image displayed at a vertical virtual image distance is farther than the horizontal virtual image distance; The reflected image is projected onto the eyeball to form a defocused image in a vertical line-of-sight image region and a focused image in a horizontal line-of-sight image region. A magnification display device comprising:

2. 2. The magnifying display device of claim 1, characterized in that the horizontal virtual image distance at which the reflective sheet and the magnifying sheet continuously reflect the projected image is defined as VIDh, the vertical virtual image distance at which the reflective sheet and the magnifying sheet continuously reflect the projected image is defined as VIDv, and the degree of astigmatism of the projected image between the vertical and horizontal directions is defined as α.

3. 2. The magnifying display device according to claim 1, wherein the reflective sheet and the magnifying sheet have a nip angle therebetween, the nip angle being within a range of 24° to 32°.

4. 2. The magnifying display device according to claim 1, wherein a height ratio between the magnifying sheet and the reflective sheet is within a range of 1:1.2 to 1:1.

5.

5. 2. The magnifying display device according to claim 1, characterized in that the magnifying sheet is a double-curved concave mirror, the magnifying sheet has a vertical curvature and a horizontal curvature, the vertical curvature being greater than the horizontal curvature, and the reflective sheet is a plane mirror or a convex mirror.

6. 2. The magnifying display device of claim 1, wherein the reflective sheet is a double-curved convex mirror, the reflective sheet has a vertical curvature and a horizontal curvature, the vertical curvature being smaller than the horizontal curvature, and the magnifying sheet is a concave mirror.

7. 2. The magnifying display device of claim 1, characterized in that the magnifying reflector module further includes an inversion frame having two ends, the reflective sheet has an upper edge and the magnifying sheet has a lower edge, and one end of the inversion frame is connected to the upper edge of the reflective sheet and the other end of the inversion frame is connected to the lower edge of the magnifying sheet.

8. 2. The magnified display device of claim 1, wherein the load frame bracket includes an arm set and a fixed base, the arm set having two ends, one end of the arm set connected to the magnified reflector module and the other end of the arm set connected to the fixed base.

9. The magnified display device of claim 8, characterized in that the arm set further includes a first arm, a second arm, a first shaft and a second shaft, the first arm has two ends and the second arm has two ends, one end of the first arm is connected to the fixed base and the other end of the first arm is connected to the first shaft, one end of the second arm is connected to the second shaft and the other end of the second arm is connected to the first shaft.

10. 10. The magnifying display device according to claim 9, wherein the arm set and the fixed base include a third shaft therebetween.

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