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 widespread use of electronic products such as smartphones and tablets, the increasing prevalence of myopia among children has become a problem facing countries around the world. In addition to heredity, using the eyes to focus on close objects for long periods of time is 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 effective is to wear eyeglasses that correct peripheral blur. The central curvature of the eyeglass lens 91 (a myopic peripheral blur lens) is tailored to the wearer's visual acuity so that the intermediate gaze is focused on the retina (i.e., focal area 921) and the wearer can see clearly. The microstructure of the peripheral region of the lens creates a smaller curvature, which increases the focal length, and as a result, the line of sight focuses in front of the retina (i.e., in the peripheral defocused region 922), so the image 93 of the line of sight comes into focus earlier. If the blurred image is around the peripheral area of the lens, only the image in the center of the lens will be sharp, the wearer's vision will be more focused, and the peripheral blurred image 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 animal (ape) experiments with good results. Medical research has shown 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 leads to permanent myopia.

[0005] Another option is to wear corrective lenses. Corrective corneal 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 press against the central cornea, causing 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 can 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, leaving the peripheral cornea in its original myopic state, so that peripheral vision is focused in front of the retina.

[0006] Corrective corneal lenses have the effect of slowing the progression of myopia, which indirectly proves that peripheral blur in myopia also has the effect of slowing the progression of 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 need for the eyes to focus on the object for a long period of time, and also exerts a vertical defocusing effect when used, slowing the growth of the eye axis and achieving the prevention and control of myopia. [Means for solving the problem]

[0008] The magnifier display of the present invention is not a near-ocular display, but instead utilizes vertical defocusing, whereby half of the line of sight is focused on the retina and the other half is focused in front of the retina, thereby partially achieving the effect of vertical defocusing and allowing the vertical virtual image distance of the magnifier display to be significantly longer than the horizontal virtual image distance of the magnifier 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 magnifying display device that includes a magnifying 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 then reflect the projected image. The magnifying sheet is configured to receive the reflected image from the reflecting 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, VIDh is defined as the horizontal virtual image distance at which the reflecting sheet and the magnifying sheet successively reflect the projected image. The vertical virtual image distance at which the reflecting sheet and the magnifying sheet continuously 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. TIFF0007719841000001.tif9150

[0011] In some embodiments, the nip angle between the reflector 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 double-curved concave mirror, where the vertical curvature is greater than the horizontal curvature, and the reflective sheet here is a flat or convex mirror.

[0014] In some embodiments, the reflective sheet is a double-curved convex mirror, the reflective sheet has a smaller vertical curvature than the horizontal curvature, and 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 reflective 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 armset further includes a first arm, a second arm, a first shaft, and a second shaft. 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.

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

[0019] [Figure 1] FIG. 1 is a schematic diagram of a peripheral blur control lens. [Figure 2] 1 is a schematic diagram of the structure of a magnified display device according to some embodiments of the present invention. [Figure 3a] 1 is a schematic diagram of a magnifying display device in use; [Figure 3b] 1 is a schematic diagram of a magnifying display device in use; [Figure 4] FIG. 2 is a schematic diagram of the optical path of the magnifying display device. [Figure 5] FIG. 10 is a schematic diagram of the angular arrangement of the magnifying sheet and the reflecting sheet. DETAILED DESCRIPTION OF THE INVENTION

[0020] In order to more clearly explain the embodiments, structures and effects of the present invention, the embodiments are accompanied by 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 reflecting sheet 11 , a magnifying sheet 12 and an inverting frame 13 . One end of the inverting frame 13 is connected to the upper edge of the reflecting sheet 11 , and the other end of the inverting 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, and 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 eyeball to form a defocused image in the vertical line of sight image area, and can project a reflected image onto the eyeball to form a focused image in the horizontal line of sight image area. In the description of the present invention, the magnifying sheet 12, as shown in Figures 3a and 3b, is taken as an example, as a double-curved concave mirror.

[0025] The aforementioned duet surface is the curvature along the vertical axis 15 and horizontal axis 1 This means that the curvature along 6 is individually defined for the user, and reflected images that are collinear with (or close to) the horizontal axis will be focused on the retina 32. Thus, half of the reflected image forms a line-of-sight image 33 in the vitreous 34 and is focused on the retina 32, and the other half is focused in front of the retina 32. In other words, a portion of the 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 focus of the eye is 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 Figure 3a), and the gaze image 311 on the vertical axis 15, which is 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 Figure 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 angle between the two eyes increases. Crystal adjustment 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] Please refer to Figure 4. The magnifying sheet 12 is a concave mirror, and the reflective sheet 11 If is a convex mirror, the formula for imaging zoom out is:

[0029] The equation for forming a virtual image on the magnifying sheet 12 follows the concave mirror imaging principle: TIFF0007719841000002.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: TIFF0007719841000003.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] Reflective sheet 11 If is a plane mirror, f2 is ∞ and the formula for the image distance is: TIFF0007719841000004.tif15153

[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 the retina 32. 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 the horizon will be blurred (like astigmatism), so there is only a limited distance from the horizontal focal length to maintain visual quality, but the distance must be large enough to produce the vertical defocus effect.

[0036] The degree of astigmatism caused by the difference in focal length between the vertical axis and the horizontal axis is generally measured using the following value α. TIFF0007719841000005.tif9150

[0037] In the formula, 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 the 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 a 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. Generally, 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 distortion of the aspect ratio 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, if the nip angle between the magnifying sheet 12 and the reflective sheet 11 is increased, the height of the reflective sheet 11 observed through the magnifying sheet 12 will be reduced, resulting in wasted vertical field of view. Therefore, the ratio between the height of the reflective sheet 11 and 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 then magnify the reflected image from the reflecting sheet; a magnifying reflector module; a load frame bracket including an armset and a fixed base, the load frame bracket holding the magnifying reflector module; In a magnifying display device comprising: To provide vertical defocus, the reflecting sheet is a double-curved convex mirror, or the magnifying sheet is a double-curved concave mirror whose curvatures along the vertical and horizontal axes are individually defined for a user; The reflected image displayed at the vertical virtual image distance is farther than the horizontal virtual image distance; the reflected image is projected onto the eye to form a vertically defocused image and a horizontally focused image; the vertically defocused image and the horizontally focused image result from the reflected image at the same object distance; A magnification display device comprising:

2. 2. The magnifying display device according to claim 1, wherein 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 degrees to 32 degrees.

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, wherein 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 according to 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, wherein the magnifying reflector module further includes an inverting frame having two ends, the reflective sheet having an upper edge and the magnifying sheet having a lower edge, and one end of the inverting frame is connected to the upper edge of the reflective sheet and the other end of the inverting 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 armset and a fixed base, the armset having two ends, one end of the armset connected to the magnified reflector module and the other end of the armset connected to the fixed base.

9. 9. The magnified display device of claim 8, wherein the arm set further includes a first arm, a second arm, a first shaft, and a second shaft; the first arm has two ends, the second arm has two ends, one end of the first arm is connected to the fixed base, 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 are provided with a third shaft therebetween.

Images