Desktop far-vision read-write device and control method

Abstract

The invention discloses a desktop far-vision read-write device and a control method, the desktop far-vision read-write device comprises a spectroscope, a first reflector and a second reflector, and the first reflector and the second reflector are respectively arranged on two sides of the spectroscope and are perpendicular to each other; light emitted to the spectroscope from the direction of the desktop is split, and a part of the light is reflected by the first reflector and is split by the spectroscope to form a first image; the other part of light is reflected by the second reflector and is split by the spectroscope to form a second image; an electric control atomization film is at least arranged on the side, facing the spectroscope, of the first reflecting mirror or the second reflecting mirror, the electric control atomization film is switched between the transparent state and the non-transparent atomization state in the power-on state and the power-off state, and therefore the first image or the second image is changed. According to the desktop far-vision read-write device, through ON / OFF state switching of the electric control atomization film, a certain amount of out-of-focus stimulation is given while reading and writing are carried out, and the growth of the ocular axis can be effectively and enduringly delayed.

Description

Technical Field

[0001] The invention relates to a desktop telescopic reading and writing device and also relates to a control method of the desktop telescopic reading and writing device. Background Art

[0002] Since American Professor Earl L Smith formally proposed the peripheral defocus theory in 2007, peripheral defocus products have emerged in an endless stream, but they are all static defocus (i.e. fixed mode, fixed defocus amount). However, clinical studies have shown that the human retina has neural adaptability, and there are phenomena such as "drunkenness theory" and "static defocus saturation". This means that the eyes of children and adolescents are easily adapted to fixed-mode defocus stimulation, and using a constant defocus amount, the prevention and control effect will decrease over time. In order to improve the durability of the myopia prevention and control effect of peripheral defocus products, it is necessary to regularly replace products with different defocus parameters to avoid adaptive reactions in the eyes.

[0003] The original desktop telescopic reading and writing equipment only prevented and controlled myopia by looking into the distance. The means were single and the effect was relatively insignificant. Chinese utility model patent application CN202421317096.X proposed a defocus protection desktop telescopic reading and writing equipment by integrating telescopic theory, peripheral defocus theory, and retinal contrast theory. The AR free-form surface dual-optical path system design realizes the simultaneous display of two images with different virtual image distances, and uses one path as a normal image and the other path as a peripheral defocus image. In order to reduce defocus tolerance, a series of optical defocus sheets are used at the same time, so that multiple defocused images are distributed in the peripheral field of vision of the human eye in various shapes such as rings, hexagons or four-leaf clover shapes. Through the unique optical design and replacement of the optical defocus sheet, the amount of light entering the eye is dynamically controlled to achieve all-round dynamic stimulation of the retina and avoid the saturation phenomenon of static defocus, but the manual replacement of the optical defocus sheet is still limited. Summary of the invention

[0004] The primary technical problem to be solved by the present invention is to provide a desktop farsighted reading and writing device that can achieve dynamic control of defocused images and / or far images and improve the myopia prevention and control effect.

[0005] Another technical problem to be solved by the present invention is to provide a control method for the desktop telescopic reading and writing device.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] According to a first aspect of the present invention, there is provided a desktop long-distance reading and writing device, comprising: an optical system composed of at least a beam splitter, a first mirror and a second mirror, the first mirror and the second mirror are respectively arranged on both sides of the beam splitter and are perpendicular to each other; the light rays incident on the beam splitter from the desktop direction are split, wherein a part of the light rays are incident on the first mirror, reflected by the first mirror and then incident on the beam splitter again, and after being split by the beam splitter, are incident on the exit pupil position to form a first image; the other part of the light rays are incident on the second mirror, reflected by the second mirror and then incident on the beam splitter again, and after being split by the beam splitter, are incident on the exit pupil position to form a second image;

[0008] At least on the side of the first mirror or the second mirror facing the beam splitter, an electro-controlled atomization film is provided, and the electro-controlled atomization film switches between a transparent state and an opaque atomized state in the energized state and the de-energized state, thereby changing the first image or the second image.

[0009] Preferably, the second image is a defocused image, and the electro-controlled atomization film is provided at least on the side of the second mirror facing the beam splitter.

[0010] Preferably, both the first image and the second image are virtual images, and the electro-controlled atomization film is provided on the side of the first mirror facing the beam splitter and on the side of the second mirror facing the beam splitter respectively.

[0011] Preferably, the first mirror or the second mirror is a plane mirror.

[0012] Preferably, both the first mirror and the second mirror are concave mirrors.

[0013] Preferably, the electro-controlled atomization film is attached to a substrate with a plane or cylindrical surface.

[0014] Preferably, the electro-controlled atomization film is a zone-controlled atomization film, and by changing the energized and de-energized states of different zones, the light transmission state and atomization state of different zones of the electro-controlled atomization film are changed.

[0015] Preferably, the electro-controlled atomization film only covers a partial area of the first mirror or the second mirror.

[0016] Preferably, the desktop long-distance reading and writing device further comprises a controller, and all the electro-controlled atomization films are connected to the same controller.

[0017] Preferably, the desktop long-distance reading and writing device is arranged on the desktop through a bracket, and the bracket has a driving mechanism, and the driving mechanism is used to drive the optical system to move in the vertical direction relative to the desktop.

[0018] Preferably, the electro-controlled atomization film is a single-layer atomization film or a multi-layer atomization film.

[0019] According to a second aspect of the present invention, there is provided a control method for a desktop far vision reading and writing device. The desktop far vision reading and writing device includes a double-path optical system composed of at least a beam splitter, a first mirror, and a second mirror. The first mirror and the second mirror are respectively arranged on both sides of the beam splitter and are perpendicular to each other. The light rays incident on the beam splitter from the desktop direction are split. A part of the light rays is incident on the first mirror, reflected by the first mirror and then incident on the beam splitter again, and after being split by the beam splitter, is incident on the exit pupil position to form a first image. Another part of the light rays is incident on the second mirror, reflected by the second mirror and then incident on the beam splitter again, and after being split by the beam splitter, is incident on the exit pupil position to form a second image;

[0020] At least an electro-controlled atomization film is provided on the side of the first mirror facing the beam splitter or the side of the second mirror facing the beam splitter. The electro-controlled atomization film switches between a transparent state and an atomized state in the powered-on state and the powered-off state, thereby changing the first image or the second image.

[0021] The desktop far vision reading and writing device provided by the present invention uses a birdbath coaxial optical system to magnify and project images of books, screens, etc. placed on the desktop at a distance. By introducing an electro-controlled atomization film in the normal imaging optical path and / or the defocus optical path, the ON / OFF state switching of the atomization film is realized through voltage control. While reading, writing homework or entertaining, a certain amount of defocus stimulation is given. At the same time, by regularly changing the defocus stimulation parameters, the nerve adaptation and defocus saturation phenomena caused by long-term exposure to the same defocus stimulation can be avoided, and the growth of the eye axis can be more effectively and durably delayed, effectively prolonging the lasting effect of myopia prevention and control. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic optical path diagram of a desktop far vision reading and writing device provided by the present invention;

[0023] Figure 2 is another schematic optical path diagram of a desktop far vision reading and writing device provided by the present invention;

[0024] Figure 3 is still another schematic optical path diagram of a desktop far vision reading and writing device provided by the present invention;

[0025] Figure 4 is a schematic diagram of the light transmission principle of the electro-controlled atomization film in the powered-on state and the powered-off state. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship, movement conditions, etc. between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0029] In order to overcome the deficiency that the existing desktop far-vision reading and writing device needs to manually replace the defocusing film regularly, we propose a desktop far-vision reading and writing device capable of dynamic control. An electro-controlled atomization film is introduced into the optical path of the desktop far-vision reading and writing device, which can realize the ON / OFF switching of the defocused image through voltage control. Based on the locally adjustable characteristics of the electro-controlled atomization film, various defocus patterns can also be designed through software to automatically replace different defocus patterns regularly / at a fixed time, effectively providing all-round defocus stimulation to the retina and more persistently and effectively preventing and controlling the progression of myopia.

[0030] Specifically, as Figure 1 、 Figure 2 and Figure 3As shown in the figure, the desktop vision far-reading and writing device provided by the present invention includes an optical system composed of at least a beam splitter 1, a first mirror 2, and a second mirror 3. Among them, the beam splitter 1 uses a plane beam splitter. The first mirror 2 and the second mirror 3 are respectively arranged on both sides of the beam splitter 1. The first mirror 2 and the second mirror 3 are arranged perpendicular to each other. The first mirror 2 and the second mirror 3 can be selected as concave mirrors or plane mirrors, and the radius of curvature of the two mirrors is different; the light rays incident on the beam splitter 1 from the desktop 4 direction are split. Among them, a part of the light rays is incident on the first mirror 2, reflected by the first mirror 2 and then incident on the beam splitter 1 again, and after being split by the beam splitter 1, it is incident on the exit pupil position 10 to form a first image; another part of the light rays is incident on the second mirror 3, reflected by the second mirror 3 and then incident on the beam splitter 1 again, and after being split by the beam splitter 1, it is incident on the exit pupil position 10 to form a second image; on the side of the first mirror 2 and / or the second mirror 3 facing the plane beam splitter 1, there are electro-controlled atomization films 5 and 6. The electro-controlled atomization films switch between a transparent state and an atomized state in the powered-on state and the powered-off state, thereby changing the first image and the second image.

[0031] As Figure 4 shown, the electro-controlled atomization film is an intelligent thin film material based on polymer dispersed liquid crystal (PDLC) technology, composed of a polymer matrix and micron-sized liquid crystal droplets, sandwiched between two layers of transparent conductive films (such as ITO-PET). The electro-controlled atomization film can switch between a transparent state and an atomized state under the control of an electric field. Figure 4 (a) and Figure 4 (b) respectively show the optical path principles of the electro-controlled atomization film in the powered-on state (ON) and the powered-off state (OFF). Among them, Figure 4 (a) is the powered-on state (ON) of the atomization film. Under the action of an electric field, the liquid crystal molecules in the middle of the atomization film are arranged orderly, matching the refractive index of the polymer matrix. The light rays incident on the atomization film can directly penetrate the atomization film, and the atomization film presents a transparent and colorless thin film state; Figure 4 (b) is the powered-off state (OFF) of the atomization film. Without the action of an electric field, the liquid crystal molecules in the middle of the atomization film are arranged disorderly in the polymer matrix. The light rays incident on the atomization film are scattered at the interface between the liquid crystal droplets and the polymer matrix and cannot penetrate the thin film, resulting in the thin film presenting a milky white and opaque atomized state.

[0032] In the embodiment provided by the present invention, the electro-controlled atomization film can be presented as a plane (see Figure 1 ) or a cylindrical state (see Figure 2), and place the electro-controlled atomization film disposed on the substrate inside the reflector; among them, the use of a planar substrate has lower requirements for the installation process, while the setting of a cylindrical substrate can make the electro-controlled atomization film closer to the reflector, reducing the stray light caused by the reflection between the two components.

[0033] In the embodiments as Figure 1 and Figure 2 shown, electro-controlled atomization films are respectively disposed in front of the two reflectors. The light rays (for example, the light rays reflected by the desktop and the objects placed on the desktop, or the light rays emitted by the display screen placed on the desktop) that shoot from the desktop direction towards the planar beam splitter 1 shoot from below towards the beam splitter 1 and are split at the position of the beam splitter 1; among them, a part of the light rays are reflected by the first reflector 2, pass through the first atomization film 5, and then are split by the beam splitter 1 again, and then shoot towards the exit pupil position 10 to form a first image; another part of the light rays are reflected by the second reflector 3, pass through the second atomization film 6, are split by the beam splitter 1 again, and then shoot towards the exit pupil position 10 to form a second image.

[0034] In a preferred implementation manner, one of the two light rays shooting towards the exit pupil position 10 forms an image at a virtual image position not less than 1 meter in front of the exit pupil position. After entering the human eye, it can be normally imaged on the retina of the human eye. The other forms a real image behind the exit pupil position to form a positive defocus image, and the corresponding diopter is controlled between +1D and +5D. The light rays in the positive defocus optical path form an image in front of the retina of the human eye after entering the human eye, showing a myopic defocus state, thereby realizing defocus stimulation and contributing to myopia prevention and control. At this time, at least an electro-controlled atomization film is provided in the defocus optical path. By controlling the on-off of the electro-controlled atomization film, changing the overall or local state of the electro-controlled atomization film can change the position and shape of the defocus image. And by respectively providing electro-controlled atomization films in the two optical paths and controlling the on-off of the electro-controlled atomization films, the two images can be alternately displayed, thereby training the human eye.

[0035] In another preferred implementation manner, the images formed by the double optical paths in the desktop far vision reading and writing device are both virtual images visible to the human eye. The two reflectors can both be concave reflectors at the same time, or one can be a concave reflector and the other can be a planar reflector; the images formed by the two optical paths respectively correspond to different virtual image distances, such as 3 meters and 5 meters. At this time, electro-controlled atomization films are respectively provided in the two optical paths. By controlling the on-off of the two electro-controlled atomization films, the two images can be alternately displayed, and the human eye can be trained.

[0036] In order to create an optical path difference between the two optical paths, the positions of the first reflector 2 and the second reflector 3 relative to the plane mirror 1 can be different, and the radius of curvature of the first reflector 2 and the second reflector 3 can also be different. Preferably, the two reflectors have different radii of curvature. Among them, the radius of curvature of the reflector for forming a defocused image (such as the second reflector 3) is smaller than the radius of curvature of the reflector for normal imaging (such as the first reflector 2).

[0037] Due to the different radii of curvature of the two reflectors, the two parts of the light split by the plane beam splitter 1 have different optical paths (i.e., images with different virtual image distances are formed); when the first electrochromic film 5 is switched to ON and the second electrochromic film 6 is switched to OFF, the image we see is only the image formed by the light reflected by the first reflector 2 and transmitted through the first electrochromic film 5 (the first image); when the first electrochromic film 5 is switched to OFF and the second electrochromic film 6 is switched to ON, the image we see is only the image formed by the light reflected by the second reflector 3 and transmitted through the second electrochromic film 6 (the second image). By intermittently switching the ON / OFF states of the two electrochromic films through voltage control, the display of images with two different virtual image distances can be switched regularly, that is, the zoom effect is achieved.

[0038] In the above implementation, the two electrochromic films are connected to the same controller, and the same controller controls the power on and off of the two electrochromic films.

[0039] As a preferred embodiment, since the electrochromic film has the function of intelligent sub-region control, the ON / OFF of a local area can be realized. Based on this feature, the function of switching the peripheral defocused image pattern can be achieved. Specifically, the central region and the edge region of the two electrochromic films have different pattern designs. For example, the central region of the first electrochromic film 5 is fully transparent, and the edge region is a shutter pattern. The central region and the edge region of the first electrochromic film 5 and the second electrochromic film 6 have the same pattern design. When the central region of the first electrochromic film 5 is ON and the edge region is OFF, and the central region of the second electrochromic film 6 is OFF and the edge region is ON, the display effect at this time is: the central region displays an image with a first virtual image distance, while the edge region displays an image with a second virtual image distance. In addition, the change effect of the pattern in the edge region can be made into regular shapes such as squares, diamonds, trapezoids, shutter shapes, etc., or irregular shapes such as text and special patterns, which can be freely selected and adjusted, very convenient and fast. Based on this, the rapid switching of the peripheral defocus pattern is realized, and it can be set to automatically switch regularly / periodically to avoid the eyes from having an adaptive reaction, thereby enhancing the persistence of the myopia prevention and control effect. Optionally, the above intelligent sub-region control ON / OFF switching can not only enable the free switching of patterns in the edge region, but also the central region can switch the pattern display; it can also not distinguish between the central region and the edge region, and freely adjust according to actual usage requirements.

[0040] As a preferred embodiment, as Figure 3 shown, an electro-controlled atomization film can also be provided only in front of a single mirror. For example, when the optical path where the second mirror 3 is located is a defocused optical path, an electro-controlled atomization film 6 can be provided only on the side of the second mirror 3 facing the beam splitter, and no electro-controlled atomization film is provided in front of the first mirror 2. By controlling the electro-controlled atomization film 6 in regions, the shape and pattern of the defocused image (the second image) can be changed, and the dynamic control effect of the defocused image can also be achieved. In this embodiment, the optical path where the vertically arranged first mirror 2 is located is taken as the normal imaging optical path, and the optical path where the horizontally arranged second mirror 3 is located is taken as the defocused optical path for illustration. It can be understood that the positions of the first mirror 2 and the second mirror 3 can also be interchanged.

[0041] In addition, the desktop vision far-reading and writing device is arranged on the desktop through a bracket, and a driving mechanism can also be configured on the bracket. For example, a linear micro-motor is used, which can vertically move the desktop vision far device along the bracket, so that the distance from the desktop object changes, thereby changing the object distance and image distance of the first mirror and the second mirror in the optical system, and realizing the continuous automatic adjustment of the virtual image distance. In this way, the variable focal length function is realized by the linear motor, and the adjustable peripheral defocused area is realized by the electro-controlled atomization film. The zoom range is larger and continuous, the peripheral defocused area is richer and can be quickly adjusted, which can meet the functions of adjustable virtual image distance and adjustable peripheral defocus stimulation parameters at the same time, and can meet the vision use needs of more people. Moreover, the switching of the zoom and defocus parameters is stable, fast, convenient and easy to control.

[0042] The following is a specific embodiment. The desktop vision far-reading and writing device is based on two Birdbath (abbreviated as BB) optical paths. The two BB optical paths share a planar beam splitter 1. The light reflected by the desktop 4 (i.e., the object placed on the desktop 4, such as a book) or the light emitted by the image source (pad, mobile phone, etc.) placed on the desktop is incident from below on the planar beam splitter 1 and is split at the position of the planar beam splitter 1; the first light formed after being reflected by the planar beam splitter 1 is reflected by the first mirror 2, passes through the first atomization film 5, and then passes through the planar beam splitter 1 and is incident on the exit pupil position to form a first image (corresponding to a virtual image distance of VID 1); the second light formed after passing through the planar beam splitter 1 is reflected by the second mirror 3, passes through the second atomization film 6, and is reflected again by the planar beam splitter 1 and is incident on the exit pupil position to form a second image (corresponding to a virtual image distance of VID2); the first light and the second light form different optical paths respectively, and the light in the two optical paths forms images in the human eye respectively. Each optical path has an independent focal plane, and the positions of the two focal planes are different.

[0043] Table 1 and Table 2 give the surface type parameters of each optical element in two optical paths. Among them, the first optical path shown in Table 1 is the optical path for normal imaging of the human eye; the second optical path shown in Table 2 is the optical path for positive defocus imaging of the human eye.

[0044] Surface type parameters of each optical element in the first optical path of Table 1

[0045] Surface Marking Surface Type Radius (mm) Thickness (mm) Alpha Tilt (°) Image Plane Spherical Infinity -5000 0 Aperture 10 Spherical Infinity 420 0 2 Spherical -1150 150 0 1 Spherical Infinity 360 -45 4 Spherical Infinity 0 -45

[0046] Surface type parameters of each optical element in the second optical path of Table 2

[0047] Surface Marking Surface Type Radius (mm) Thickness (mm) Alpha Tilt (°) Image Plane Spherical Infinity 500 0 Aperture 10 Spherical Infinity 260 0 1 Spherical Infinity 200 -45 3 Spherical 730 580 -45 4 Spherical Infinity 0 0

[0048] For the above defocus protection desktop vision far reading and writing device, the exit pupil distance is between 150 mm and 300 mm, the exit pupil eye movement range is not less than φ60 mm, the field of view angle is not less than 35° and does not exceed 42°.

[0049] In this embodiment, a first atomization film 5 and a second atomization film 6 are correspondingly arranged on the inner sides of the first reflector 2 and the second reflector 3. One of them is controlled by the controller to be in the ON state and the other is in the OFF state. In this way, only one path of light can enter the human eye normally; by periodically switching the ON / OFF combination of the first atomization film 5 and the second atomization film 6, dynamic control is realized.

[0050] The two electronically controlled atomization films can be switched to the transparent state or the opaque state as a whole or locally, and patterns can also be customized to achieve specific display content of the defocus optical path. The change effect of the pattern of the electronically controlled atomization film can be made into regular graphics, such as square, rhombus, trapezoid, louver shape, etc., or into irregular graphics, such as text and special patterns, which can be freely selected and adjusted, very convenient and fast. In addition to the setting method of covering the entire reflecting surface of the first reflector or the second reflector, the electronically controlled atomization film can also only cover a partial reflecting area of the first reflector or the second reflector. By locally controlling the electronically controlled atomization film through the controller, dynamic control can also be realized. And, in addition to the single-layer use method, the electronically controlled atomization film can also be stacked by multiple atomization films to meet more specific pattern requirements.

[0051] The present invention also provides a control method for the above desktop vision far reading and writing device, and realizes a dynamic control effect by controlling the ON / OFF of the electronically controlled atomization film through the controller.

[0052] Specifically, the desktop vision far-reading and writing device provided by the present invention includes at least a dual-light-path optical system composed of a beam splitter 1, a first mirror 2, and a second mirror 3. Among them, the first mirror 2 and the second mirror 3 are respectively arranged on both sides of the beam splitter 1; the light rays incident on the beam splitter 1 from the desktop direction are split, and a part of the light rays are incident on the first mirror 2, reflected by the first mirror 2 and then incident on the beam splitter 1 again, and after being split by the beam splitter 1, they are incident on the exit pupil position 10 to form a first image; the other part of the light rays are incident on the second mirror 3, reflected by the second mirror 3 and then incident on the beam splitter 1 again, and after being split by the beam splitter 1, they are incident on the exit pupil position 10 to form a second image; the positions of the first image and the second image relative to the human eye are different; at least an electro-controlled atomization film is provided on the side of the first mirror 2 or the second mirror 3 facing the beam splitter 1, and all the electro-controlled atomization films are connected to a controller to control the electro-controlled atomization film to switch between a transparent state and an atomized state in the energized state and the de-energized state, so as to change the first image or the second image, and give a certain amount of defocusing stimulation while reading, writing homework or entertaining. Moreover, the defocusing stimulation parameters can be changed regularly.

[0053] When the desktop vision far-reading and writing device only includes one electro-controlled atomization film, the electro-controlled atomization film is arranged in the defocusing optical path. For example, the second image is a defocused image, and at least an electro-controlled atomization film is provided on the side of the second mirror 3 facing the beam splitter 1, and the control device makes the electro-controlled atomization film alternately turn on and off. Or, the controller performs local targeted control on different regions in the electro-controlled atomization film to form different light-transmitting patterns, thereby changing the shapes and positions of multiple defocused images.

[0054] When the desktop vision far-reading and writing device is provided with electro-controlled atomization films in both light paths, electro-controlled atomization films are respectively provided on the side of the first mirror facing the beam splitter and the side of the second mirror facing the beam splitter. The controller makes the two electro-controlled atomization films alternately turn on and off. Or, in combination with the zone control of the electro-controlled atomization film, the controller changes the energized and de-energized states of different regions of the electro-controlled atomization film to change the light-transmitting state and atomized state of different regions of the electro-controlled atomization film.

[0055] In addition, when a driving mechanism is connected to the bracket of the desktop vision far-reading and writing device, the driving mechanism can be connected to the controller, and the driving mechanism is used to drive the optical system to move in the vertical direction relative to the desktop along the bracket; in combination with the on-off control of the two electro-controlled atomization films, more complex defocusing and zooming effects can be achieved.

[0056] In summary, the desktop far-vision reading and writing device provided by the present invention uses a birdbath coaxial optical system to magnify and project the images of books, screens, etc. placed on the desktop. By introducing an atomization film whose ON / OFF state can be switched globally / local, a certain amount of defocus stimulation is given while reading, writing homework or entertaining. The defocus stimulation parameters can also be changed regularly, which can avoid the neural adaptation and defocus saturation phenomena caused by long-term exposure to the same defocus stimulation, and can more effectively and durably delay the growth of the eye axis, effectively prolonging the lasting effect of myopia prevention and control. Compared with regularly replacing defocus products of different brands to avoid neural adaptation, the desktop far-vision reading and writing device with an electronically controlled atomization film can meet the function of adjustable peripheral defocus stimulation parameters, and the switching of defocus parameters is stable, fast, convenient and easy to control.

[0057] The above has elaborated in detail on a desktop far-vision reading and writing device and its control method provided by the present invention. For those of ordinary skill in the art, any obvious changes made to it without departing from the essence of the present invention will constitute an infringement of the patent right of the present invention and will bear corresponding legal responsibilities.

Claims

1. A desktop device for reading and writing while looking into the distance, characterized in that, Comprising: An optical system composed of at least a spectroscope, a first mirror, and a second mirror. The first mirror and the second mirror are respectively arranged on both sides of the spectroscope and are perpendicular to each other. The light rays incident on the spectroscope from the desktop direction are split. Part of the light rays are incident on the first mirror, reflected by the first mirror and then incident on the spectroscope again, and after being split by the spectroscope, are incident on the exit pupil position to form a first image. The other part of the light rays are incident on the second mirror, reflected by the second mirror and then incident on the spectroscope again, and after being split by the spectroscope, are incident on the exit pupil position to form a second image. At least an electro-controlled atomization film is arranged on the side of the first mirror or the second mirror facing the spectroscope. The electro-controlled atomization film switches between a transparent state and an opaque atomized state in the powered-on state and the powered-off state, thereby changing the first image or the second image.

2. The desktop vision far reading and writing device according to claim 1, wherein: The second image is a defocused image, and at least an electro-controlled atomization film is arranged on the side of the second mirror facing the spectroscope.

3. The desktop vision far reading and writing device according to claim 1, wherein: Both the first image and the second image are virtual images, and electro-controlled atomization films are respectively arranged on the side of the first mirror facing the spectroscope and the side of the second mirror facing the spectroscope.

4. The desktop vision far reading and writing device according to claim 3, wherein: The first mirror or the second mirror is a plane mirror.

5. The desktop vision far reading and writing device according to claim 3, wherein: Both the first mirror and the second mirror are concave mirrors.

6. The desktop vision far reading and writing device according to claim 2 or 3, wherein: The electro-controlled atomization film is attached to a substrate with a plane or cylindrical surface.

7. The desktop vision far reading and writing device according to claim 2 or 3, wherein: The electro-controlled atomization film is a zone-controlled atomization film, and by changing the powered-on and powered-off states of different zones, the light transmission states and atomized states of different zones of the electro-controlled atomization film are changed.

8. The desktop vision far reading and writing device according to claim 1, wherein: The electro-controlled atomization film only covers a partial area of the first mirror or the second mirror.

9. The desktop visual far-reading and writing device according to claim 1, characterized in that Further comprising: A controller, and all the electro-controlled atomization films are connected to the same controller.

10. The desktop vision far reading and writing device according to claim 1, wherein: The desktop vision far reading and writing device is arranged on the desktop through a bracket, and the bracket has a driving mechanism, and the driving mechanism is used to drive the optical system to move in the vertical direction relative to the desktop.

11. The desktop vision far reading and writing device according to claim 1, wherein: The electro-controlled atomization film is a single-layer atomization film or a multi-layer atomization film.

12. A control method for a desktop vision far reading and writing device, wherein: It includes a dual-path optical system composed of at least a spectroscope, a first reflector, and a second reflector. Among them, the first reflector and the second reflector are respectively arranged on both sides of the spectroscope; the light rays incident on the spectroscope from the desktop direction are split, and a part of the light rays are incident on the first reflector, reflected by the first reflector and then incident on the spectroscope again, and after being split by the spectroscope, are incident on the exit pupil position to form a first image; another part of the light rays are incident on the second reflector, reflected by the second reflector and then incident on the spectroscope again, and after being split by the spectroscope, are incident on the exit pupil position to form a second image; An electro-controlled atomization film is provided at least on the side of the first reflector facing the spectroscope or on the side of the second reflector facing the spectroscope. The electro-controlled atomization film switches between a transparent state and an opaque atomized state in the energized state and the de-energized state, thereby changing the first image or the second image.

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