Desktop far-vision read-write device with display light path and control method

Abstract

The invention discloses a desktop remote reading and writing device with a display light path and a control method, the desktop remote reading and writing device comprises an optical system at least composed of a first spectroscope, a reflector and a first image source, and the reflector and the first image source are respectively arranged on two sides of the first spectroscope and are perpendicular to each other; light emitted to the first spectroscope from the direction of the desktop is split, one part of the light is emitted to the reflector, reflected by the reflector and then emitted to the first spectroscope again, and after being split by the first spectroscope, the light is emitted to the exit pupil position to form a first image; light emitted from the first image source is split by the first spectroscope and then is emitted to the exit pupil position to form a second image. According to the desktop far-vision read-write device, a display light path is added, in a desktop writing scene, out-of-focus stimulation and contrast control can be carried out while reading and writing are carried out, meanwhile, visual training can be carried out, and the diversity of myopia prevention and control schemes is increased.

Description

Technical Field

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

[0002] With the widespread use of electronic products and changes in learning and working styles, prolonged close-up eye use has become a major contributing factor to myopia. Traditional reading and writing methods often place prolonged strain on the eyes, which can lead to vision loss. While some vision training devices and methods are available on the market, most require additional time and space, making them difficult to integrate with daily reading and writing activities.

[0003] Desktop telescopic reading and writing devices use optical means to extend short-range reading and writing to long-range imaging. Currently, many similar products are available on the market and are being used to prevent and control myopia in adolescents. However, existing desktop telescopic reading and writing devices are limited to reading and writing devices, or have a single, static myopia prevention and control effect, lacking visual training capabilities. Because a single optical path for long-range imaging has limited effectiveness in myopia prevention and control, the development of a desktop device that can combine telescopic reading and writing with visual training is particularly important. 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 with a display optical path, which can realize various myopia prevention and control measures such as defocus stimulation, contrast control, and visual training.

[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 telescopic reading and writing device with a display optical path, comprising:

[0008] An optical system consisting of at least a first beam splitter, a reflector, and a first image source, wherein the reflector and the first image source are respectively arranged on both sides of the first beam splitter and are perpendicular to each other;

[0009] Light directed from the desktop to the first beam splitter is split, with a portion of the light directed to the reflector, reflected by the reflector, and then directed to the first beam splitter again. After being split by the first beam splitter, the light is directed to the exit pupil position, forming a first image.

[0010] The light emitted from the first image source is split by the first beam splitter and then emitted to the exit pupil position to form a second image;

[0011] The first image source is fixedly or detachably arranged inside the desktop telescopic reading and writing device, and can be turned off under the control of the reading and writing device when not in use. When in use, because it is placed inside the reading and writing device, it should preferentially start executing a predetermined display program or can only work in a specific display mode so that the first image and the second image have at least partially different image information.

[0012] Preferably, the first image is located at a position not less than 1 meter in front of the exit pupil position.

[0013] Preferably, the first image is located 3 meters to 8 meters in front of the exit pupil position.

[0014] Preferably, the second image is located no more than 1 meter in front of the exit pupil position.

[0015] Preferably, a lens or lens group with positive optical power is provided on the side of the first image source facing the first beam splitter.

[0016] Preferably, the desktop telescopic reading and writing device further includes a second image source, which is configured to be disposed on a desktop and provide light to the first beam splitter, and the second image source exchanges data with the first image source.

[0017] Preferably, a first polarization splitter film is attached to either side surface of the first beam splitter, the first polarization splitter film transmits the first linear polarized light and reflects the second linear polarized light, and a first quarter-wave plate is arranged between the first beam splitter and the reflector, and the first quarter-wave plate is closer to the reflector than the first polarization splitter film.

[0018] Preferably, the first image source is arranged vertically, and the first image source and the second image source are used to provide first linearly polarized light.

[0019] Preferably, the first image source is arranged horizontally, and is used to provide second linearly polarized light;

[0020] The second image source is used to provide second linearly polarized light or circularly polarized light, wherein the circularly polarized light forms second linearly polarized light after passing through the first quarter-wave plate.

[0021] Preferably, the desktop telescopic reading and writing device further comprises a second beam splitter, which is horizontally arranged below the first beam splitter;

[0022] The light transmitted from the desktop through the second beam splitter is directed to the first beam splitter and split. A portion of the light is directed to the reflector, reflected by the reflector, and then directed to the first beam splitter again. After being split by the first beam splitter, the light is directed to the exit pupil position to form a first image.

[0023] The light emitted from the first image source is split by the first beam splitter and then emitted to the second beam splitter. After being reflected by the second beam splitter, the light is split by the first beam splitter and reflected by the reflector before being emitted to the first beam splitter. After being split by the first beam splitter, the light is emitted to the exit pupil position to form a second image.

[0024] According to a second aspect of the present invention, a control method for a desktop telescopic reading and writing device is provided, comprising a dual-light-path optical system consisting of at least a first beam splitter, a reflector, a first image source, and a second image source, wherein the reflector and the first image source are respectively disposed on either side of the first beam splitter, the second image source is configured to be disposed on a desktop and to provide light to the first beam splitter, and the second image source and the first image source exchange data;

[0025] The light emitted by the first image source is split by the first beam splitter and then emitted to the exit pupil position to form a second image;

[0026] The light from the second image source directed toward the first beam splitter is split, reflected by the reflector, and then split again by the first beam splitter before being directed toward the exit pupil to form a first image;

[0027] The first image source and the second image source display images simultaneously or alternately.

[0028] The desktop telescopic reading and writing device with a display optical path provided by the present invention adds a display optical path to the desktop telescopic reading and writing scenario, allowing for defocus display, contrast control, or visual training to be performed simultaneously with telescopic reading and writing, thereby increasing the diversity of myopia prevention and control solutions. Furthermore, as a preferred embodiment, a second image source can be placed below the desktop telescopic reading and writing device to achieve telescopic image display, thereby further expanding the use scenarios of the desktop telescopic reading and writing device. In addition to reading and writing scenarios, the desktop display is added for use, and combined with the display optical path in the desktop telescopic reading and writing device, more complex defocus prevention and control, contrast control, and visual training can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 1 is a schematic structural diagram of a desktop telescopic reading and writing device provided in the first embodiment;

[0030] Figure 2 yes Figure 1 Schematic diagram of the optical path of the desktop telescopic reading and writing device shown;

[0031] Figure 3 2 is a schematic structural diagram of a desktop telescopic reading and writing device provided by a second embodiment;

[0032] Figure 4 yes Figure 3The diagram of the connection between two image sources in the desktop telescopic reading and writing device shown;

[0033] Figure 5 yes Figure 3 A schematic diagram of an optical path of a desktop telescopic reading and writing device is shown;

[0034] Figure 6 yes Figure 3 Another optical path schematic diagram of a desktop telescopic reading and writing device is shown;

[0035] Figure 7 2 is a schematic structural diagram of a desktop telescopic reading and writing device provided in a third embodiment;

[0036] Figure 8 yes Figure 7 Schematic diagram of the first display optical path in the desktop telescopic reading and writing device shown;

[0037] Figure 9 yes Figure 7 The diagram shows the second display optical path in the desktop telescopic reading and writing device. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] 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 number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The desktop telescopic reading and writing device provided by the present invention expands the use functions of the desktop telescopic reading and writing device and increases the diversity of myopia prevention and control methods by setting at least one display light path. In the desktop telescopic reading and writing device, there are two light paths, at least one of which is a display light path with an image source, and the other light path is a light path for imaging a book or image source placed on the desktop; in actual use, the first spectroscope 1 is located at a position 45° to the horizontal plane (desktop), at this time, both light beams are emitted in a horizontal direction toward the exit pupil position, and the normal direction of the exit pupil position is parallel to the desktop, which corresponds to a horizontal exit pupil position; at the exit pupil position, two images of different depths can be observed. When the angle between the first spectroscope 1 and the horizontal plane changes, the two light beams will be emitted toward the exit pupil position in an oblique manner.

[0042] In actual use, when the desktop telescopic reading and writing device is used as a reading and writing device, by placing a book on the desktop, the telescopic reading and writing function is realized, and the image is displayed by the first display screen to realize the defocus control and contrast control functions. When the desktop telescopic reading and writing device is used as a visual training device, the desktop object is preferably a display screen (second display screen) that can provide an image source, and the visual distance and visual focus can be adjusted by switching the switches or images of the two display screens. When the human eye is viewed from the exit pupil position, if the first display screen and the second display screen are displayed at the same time, two images of different depth distances (the first image and the second image) can be seen at the same time; by actively or passively switching the visual focus of the human eye to the first image or the second image, the function of visual training can be realized; or by switching the intermittent display of the first display screen and the second display screen, the human eye can only view the image of a certain depth distance (i.e., the first image or the second image) alone, which can also realize the function of visual training.

[0043] First embodiment

[0044] like Figure 1 The desktop telescopic reading and writing device shown includes: an optical system consisting of at least a first beam splitter 1, a reflector 2 and a first image source 3, wherein the first beam splitter 1 is preferably a plane beam splitter, the reflector 2 is preferably a concave reflector, the object distance range of the reflector 2 (the distance from the highest point of the center of the reflector 2 to the desktop) is 440mm to 570mm, and the first image source 3 is realized by a first display screen; the reflector 2 and the first image source 3 are respectively arranged on both sides of the first beam splitter 1, and the reflector 2 can be arranged vertically facing the first beam splitter 1, or horizontally facing the first beam splitter 1. Accordingly, the first image source 3 is arranged on the other side of the first beam splitter 1 relative to the reflector 2 and is perpendicular to the reflector 2, and the first image source 3 is located in a horizontal position or a vertical position.

[0045] In this desktop telescopic reading and writing device, there is a normal imaging optical path that presents a telescopic image of an object 4 (such as a paper reading material or workbook) placed on the desktop. Light directed from the desktop toward the first beam splitter 1 is split, with a portion of the light directed toward the reflector 2. After being reflected by the reflector 2, it is directed toward the first beam splitter 1 again. After being split by the first beam splitter 1, it is directed toward the exit pupil 5 to form a first image. For the first image, due to the refraction and reflection by the reflector 2, the optical path is longer, and the first image is located at least 1 meter in front of the exit pupil 5. Preferably, the first image is located 3 to 8 meters in front of the exit pupil 5. The above-mentioned change in virtual image distance is achieved by adjusting the overall height of the desktop telescopic reading and writing device.

[0046] In the desktop telescopic reading and writing device, there is a display light path. The light emitted from the first image source 3 is split by the first beam splitter 1 and then emitted to the exit pupil position 5 to form a second image.

[0047] When no lens is disposed between the first image source 3 and the first beam splitter 1, if the first image source 3 is located vertically in front of the first beam splitter 1, the human eye at the exit pupil position can directly see the image displayed by the first image source 3 (i.e., the second image). If the first image source 3 is located horizontally above the first beam splitter 1, the second image viewed by the human eye at the exit pupil position is the same size as the image displayed by the first image source 3. In this case, the optical path corresponding to the second image is shorter, and the second image is located relatively close to the exit pupil position 5, for example, no more than 1 meter.

[0048] Furthermore, a lens, such as a single lens or a lens assembly with positive optical power, can be disposed on the side of first image source 3 facing first beam splitter 1 to magnify the image of first image source 3. In this case, the human eye sees a magnified virtual image at the exit pupil. By varying the distance between the lens and first image source 3, the virtual image distance and size of the second image can be adjusted.

[0049] In this embodiment, the first image source 3 is fixedly or removably disposed within the desktop telescopic reading / writing device. When not in use, the first image source 3 can be controlled by the desktop telescopic reading / writing device to be deactivated. When in use, due to its placement within the reading / writing device, the first image source 3 is preferentially activated to execute a predetermined display program or to operate only in a specific display mode, thereby causing the first image and the second image to have at least partially different image information. While the first image source 3 can be removed when not in use, it is generally recommended that the first image source 3 be fixedly disposed within the desktop telescopic reading / writing device to ensure the normal service life of the first image source 3.

[0050] like Figure 1As shown, the desktop telescopic reading and writing device further comprises a bracket 7. By connecting the bracket 7 to the desktop telescopic reading and writing device, the desktop telescopic reading and writing device is placed above the desktop. The distance between the desktop telescopic reading and writing device and the desktop is adjustable.

[0051] The desktop telescopic reading and writing device includes a housing 6, a first image source 3 and a reflector 2 fixedly disposed inside the housing 6, and a first beam splitter 1 disposed between the first image source 3 and the reflector 2. The desktop telescopic reading and writing device can be either fixed or foldable. In a fixed device, the reflector 2 remains fixed in a horizontal or vertical position, regardless of whether it is in use. The reflector 2 is always perpendicular to the first image source 3. The first beam splitter 1 is always tilted between the first image source 3 and the reflector 2, forming a 45° angle with the desktop. Optionally, this angle can range from 35° to 55°. In the foldable device, the reflector 2 and / or the first image source 3 can be rotated, so that the reflector 2 and the first image source 3 can be switched between mutually parallel and mutually perpendicular states. When the reflector 2 and the first image source 3 are parallel to each other, it corresponds to the folded state of the desktop telescopic reading and writing device, that is, the idle state; and when the reflector 2 and the first image source 3 are perpendicular to each other, it corresponds to the opened state of the desktop telescopic reading and writing device, that is, the usage state; accordingly, the first beam splitter 1 also switches between an inclined or vertical state, and is always located between the reflector 2 and the first image source 3.

[0052] In the above embodiment, by adding a first image source 3 to the desktop telescopic reading and writing device, introducing a display light path, and displaying different images through the first image source 3, the functions of defocus prevention and control, contrast control and visual training can be achieved.

[0053] Second embodiment

[0054] like Figure 3 and Figure 4 The illustrated embodiment, a desktop telescopic reading and writing device, includes an optical system consisting of at least a first beam splitter 11, a reflector 12, and a first image source 13. The reflector 12 and the first image source 13 are disposed on either side of the first beam splitter 11. The reflector 12 can be disposed vertically or horizontally facing the first beam splitter 11. Accordingly, the first image source 13 is disposed on the other side of the first beam splitter 11 relative to the reflector 12 and perpendicular to the reflector 12. The first image source 13 is positioned horizontally or vertically. The above structure is similar to that of the first embodiment and will not be described in detail here.

[0055] The desktop telescopic reading and writing device also includes a second image source 14, implemented using a second display screen. The second image source 14 is configured to be mounted on a desktop and provide light to the first beam splitter 1. Furthermore, the second image source 14 exchanges data with the first image source 13. In this embodiment, to maintain consistent luminance at the eye level of the two display light paths, the brightness of the second image source 14 should be higher than that of the first image source 13. The size of the second image source 14 is not limited, but should be smaller than the light incident area below the desktop telescopic reading and writing device.

[0056] This desktop telescopic reading and writing device has two display light paths. The first display light path corresponds to the second image source 14. This light path is identical to the normal telescopic image light path from the desktop to the first beam splitter, suitable for desktop writing in the first embodiment. The difference is that a display screen (i.e., the second image source 14) is placed on the desktop instead of a book. The second image source 14 does not need to be fixed below the desktop telescopic reading and writing device. It is only when it is needed that it is connected to the first image source 13 and placed below the desktop telescopic reading and writing device. Under normal circumstances, the second image source 14 can be removed, allowing the desktop telescopic reading and writing device to achieve telescopic reading and writing functions.

[0057] When the second image source 14 is positioned below the desktop telescopic reading and writing device, light emitted by the second image source 14 is directed from the desktop toward the first beam splitter 11 and split. A portion of the light is directed toward the reflector 12, reflected by the reflector 12, and then directed toward the first beam splitter 11. After being split by the first beam splitter 11, the light is directed toward the exit pupil 15, forming a first image. The first image is located at least 1 meter in front of the exit pupil 15, and preferably 3 to 8 meters in front of the exit pupil 15. The aforementioned change in virtual image distance is achieved by adjusting the overall height of the desktop telescopic reading and writing device.

[0058] The second display optical path in this desktop telescopic reading and writing device corresponds to the first image source 13. In this embodiment, the display optical path corresponding to the first image source 13 is identical to that in the first embodiment. Light emitted from the first image source 13 is split by the first beam splitter 11 and then emitted toward the exit pupil 15, forming a second image. A lens can be positioned in front of the first image source 13 to magnify the image displayed by the first image source 13 and adjust the virtual image distance. Similarly, by varying the distance between the lens and the first image source 13, the virtual image distance and size of the second image can be adjusted.

[0059] Unlike the first embodiment, this embodiment disposes a second image source 14 in the area below the entire desktop telescopic reader / writer device, which interacts with the first image source 13. By having the first and second image sources 13, 14 display images simultaneously or alternately, more complex visual training, defocus control, and contrast control can be achieved. The first and second image sources 13, 14 can display the same image or different images. Data can be exchanged between the first and second image sources 13, 14 via a data cable, Bluetooth, Wi-Fi, or even the internet, enabling data exchange between different terminals within the same program, with or without the desktop telescopic reader / writer device. There are no restrictions on the interaction method or displayed content between the two image sources.

[0060] In this embodiment, the first image source 13 is fixedly disposed inside the desktop telescopic reading and writing device and can be turned off when not in use. Of course, the first image source 13 can also be removed when not in use. It is generally recommended that the first image source 13 be disposed inside the desktop telescopic reading and writing device to ensure normal use of the first image source 13.

[0061] The desktop telescopic reading and writing device also includes a bracket 17. By connecting the bracket 17 to the desktop telescopic reading and writing device, the desktop telescopic reading and writing device can be placed on a desktop. The desktop telescopic reading and writing device also includes a housing 16. The first image source 13 and the reflector 12 are fixedly disposed inside the housing 16, and the first beam splitter 11 is disposed between the first image source 13 and the reflector 12. The desktop telescopic reading and writing device can be either a fixed device or a foldable device. The fixed and foldable devices are not described in detail here.

[0062] In the second embodiment, by adding a first image source 13 to the desktop telescopic reading and writing device and introducing a display optical path, different images are displayed by the first image source 13, thereby realizing the functions of defocus prevention and control, contrast control, and visual training. At the same time, when the second image source 14 is placed on the desktop, and data is exchanged between the second image source 14 and the first image source 13, and the second image source 14 and the first image source 13 are displayed simultaneously or alternately, the first image and the second image exist at the same time, and the human eye can selectively focus on the first image or the second image, and the device can be used as a visual training device; when the first image source 13 and the second image source 14 are jointly controlled and intermittently work independently, the human eye intermittently focuses on the first image and the second image at different depths, which can also achieve the purpose of visual training.

[0063] Since there are two display light paths in the desktop telescopic reading and writing device, and the two display light paths are combined through the first beam splitter 11, due to the beam splitting effect of the first beam splitter 11, when the two image sources use circularly polarized light or natural light, reflected stray light will inevitably be generated, which will affect normal imaging.

[0064] To eliminate stray light, the second embodiment of the present invention incorporates a polarization optical system. By disposing a first polarization beam splitter film 18 on the surface of the first beam splitter 11 and a first quarter-wave plate 19 between the first beam splitter 11 and the reflector 12, the polarization states of the two light beams are regulated, thereby reducing stray light. Furthermore, by modulating the polarization states of the light emitted by the first image source 13 and the second image source 14, light energy utilization can be improved.

[0065] like Figure 5 As shown, when the first image source 13 is arranged vertically and the second image source 14 is placed on a table, the first image source 13 and the second image source 14 are located on the same side of the first beam splitter 11, and the first image source 13 and the second image source 14 provide first linearly polarized light with the same polarization direction to the first beam splitter 11. In this case, the first polarization beam splitter film 18 can be arranged on either side of the first beam splitter 11. The first polarization beam splitter film 18 is used to transmit the first linearly polarized light and reflect the second linearly polarized light, with the polarization directions of the first linearly polarized light and the second linearly polarized light being perpendicular to each other. The first quarter-wave plate 19 is closer to the reflector 12 than the first polarization beam splitter film 18. The first quarter-wave plate 19 can be a curved film or a flat film and can be attached to the surface of the first beam splitter 11 or the reflector 12.

[0066] Taking the first linear polarized light as P light and the second linear polarized light as S light as an example, Figure 5 The optical path principle is described as shown in Figure 5 In the embodiment, a first polarizer 18 and a first quarter-wave plate 19 are simultaneously disposed on the surface of the first beam splitter 11. At this time, the first image source 13 emits P light toward the first beam splitter 11. The P light passes through the first polarization film 18 and the first quarter-wave plate 19 on the surfaces of the first beam splitter 11 and is emitted toward the exit pupil 15. The human eye can receive right-handed polarized light (RCP). The second image source 14 emits P light toward the first beam splitter 11. The P light passes through the first polarization film 18 and is emitted toward the reflector 12. Upon passing through the first quarter-wave plate 19, the polarization state of the P light changes to right-handed circularly polarized light. After reflection from the reflector 12, the light becomes left-handed circularly polarized light. After passing through the first quarter-wave plate 19 again, the light becomes S light. The S light is then reflected by the polarization film 18 and is emitted toward the exit pupil 15. Upon passing through the first quarter-wave plate 19 again, the light becomes left-handed polarized light (LCP). The human eye can simultaneously receive light from the first image source 13 and light from the second image source 14 at the exit pupil 15, thereby perceiving the first and second images.

[0067] In addition, the first quarter-wave plate 19 can also be set on the surface of the reflector 12. In this case, the first image source 13 emits P light to the first beam splitter 11. The P light passes through the first polarization beam splitter film 18 on the surface of the first beam splitter 11 and is emitted to the exit pupil position 15, where the human eye receives the P light. The second image source 14 emits P light to the first beam splitter 11. The P light passes through the first polarization beam splitter film 18 and is emitted to the reflector 12. When passing through the first quarter-wave plate 19, the polarization state of the P light changes to right-handed circular polarization. After being reflected by the reflector 12, it becomes left-handed circular polarization. After passing through the first quarter-wave plate 19 again, it becomes S light. Then, the S light is reflected by the polarization beam splitter film 18 and is emitted to the exit pupil position 15, where the human eye receives the S light. The human eye can simultaneously receive the light from the first image source 13 and the light from the second image source 14 at the exit pupil position 15, thereby seeing the first image and the second image.

[0068] like Figure 6 As shown, when the first image source 13 is positioned horizontally and the second image source 14 is placed on a table, the first image source 13 and the second image source 14 are positioned oppositely on either side of the first beam splitter 11. In this case, the first image source 13 provides the second linearly polarized light to the first beam splitter 11, and the second image source 14 provides the second linearly polarized light or the first circularly polarized light to the first beam splitter 11. The first circularly polarized light can be converted into the second linearly polarized light after passing through the first quarter-wave plate 19. A first polarization beam splitter film 18 can be positioned on either side of the first beam splitter 11. The first polarization beam splitter film 18 is configured to transmit the first linearly polarized light and reflect the second linearly polarized light, with the polarization directions of the first and second linearly polarized lights being perpendicular to each other. The first quarter-wave plate 19 is positioned between the first beam splitter 11 and the reflector 12. The first quarter-wave plate 19 can be positioned on the surface of the first beam splitter 11 or the reflector 12, closer to the reflector 12 than the first polarization beam splitter film 18. The first quarter-wave plate 19 can be a curved or flat film.

[0069] Taking the first linear polarized light as P light and the second linear polarized light as S light as an example, Figure 6 The optical path principle is described as shown in FIG. Figure 6As shown, a first polarization beam splitter film 18 and a first quarter-wave plate 19 are simultaneously disposed on the surface of the first beam splitter 11. At this time, the first image source 13 emits S light toward the first beam splitter 11. The S light is reflected by the first polarization beam splitter film 18 on the surface of the first beam splitter 11 and emitted toward the exit pupil 15. The second image source 14 emits left-handed circularly polarized light (LCP) toward the first beam splitter 11. The left-handed circularly polarized light becomes S light when passing through the first quarter-wave plate 19. The light is then reflected by the first polarization beam splitter film 18 and emitted toward the reflector 12. When passing through the first quarter-wave plate 19 again, the polarization state of the left-handed circularly polarized light is changed back to left-handed circularly polarized light. The left-handed circularly polarized light is reflected by the reflector 12 and becomes right-handed circularly polarized light (RCP). After passing through the first quarter-wave plate 19 again, the left-handed circularly polarized light becomes P light. The P light then passes through the first polarization beam splitter film 18 and emitted toward the exit pupil 15. The human eye can simultaneously receive the light from the first image source 13 and the light from the second image source 14 at the exit pupil 15, thereby perceiving the first image and the second image.

[0070] Similarly, the first quarter-wave plate 19 can also be disposed on the surface of the reflector 12. In this case, the first image source 13 emits S light toward the first beam splitter 11. The S light is reflected by the first polarization beam splitter film 18 on the surface of the first beam splitter 11 and then emitted toward the exit pupil 15. The second image source 14 emits S light toward the first beam splitter 11. The S light is reflected by the first polarization beam splitter film 18 and then emitted toward the reflector 12. When passing through the first quarter-wave plate 19, the polarization state of the S light changes to left-handed circularly polarized light. The left-handed circularly polarized light is reflected by the reflector 12 and then becomes right-handed circularly polarized light (RCP). After passing through the first quarter-wave plate 19 again, the left-handed circularly polarized light changes to P light. The P light then passes through the first polarization beam splitter film 18 and then emits toward the exit pupil 15. Similarly, the human eye can simultaneously receive the light from the first image source 13 and the light from the second image source 14 at the exit pupil 15, thereby seeing the first image and the second image.

[0071] In addition, the present invention also provides a control method for the above-mentioned desktop telescopic reading and writing device, including a dual-optical path optical system consisting of a first beam splitter, a reflector, a first image source and a second image source, wherein the reflector and the first image source are respectively arranged on both sides of the first beam splitter, and the second image source is configured to be set on the desktop and provide light to the first beam splitter, the second image source and the first image source are located on the same side or different sides of the first beam splitter, and the second image source and the first image source exchange data; the light emitted by the first image source is emitted to the exit pupil position after being split by the first beam splitter to form a second image; the light emitted by the second image source is emitted to the first beam splitter and then split, and then reflected by the reflector, and after being split again by the first beam splitter, it is emitted to the exit pupil position to form a first image; the first image source and the second image source display images simultaneously or alternately.

[0072] Third embodiment

[0073] like Figure 7 In the embodiment shown, a desktop telescopic reading and writing device comprises: an optical system consisting of at least a first beam splitter 31, a reflector 32, a first image source 33, and a second beam splitter 36, wherein the reflector 32 and the first image source 33 are respectively arranged on both sides of the first beam splitter 31, and the reflector 32 can be arranged vertically facing the first beam splitter 31, or horizontally facing the first beam splitter 31. Accordingly, the first image source 33 is arranged on the other side of the first beam splitter 31 relative to the reflector 32 and is perpendicular to the reflector 32. The first image source 33 is located in a horizontal position or a vertical position; the second beam splitter 36 is horizontally arranged below the first beam splitter 31, and the second beam splitter is preferably a plane mirror.

[0074] Beneath the desktop telescopic reading and writing device, specifically, beneath the second beam splitter 36, there is a self-luminous second image source 34 or an object (e.g., a book) placed on the desktop that reflects light toward the second beam splitter 36. Both the second image source 34 and the book can be removed from beneath the desktop telescopic reading and writing device, enabling switching between the telescopic writing function and the vision training function. Similar to the second embodiment, when the second image source 34 is placed beneath the desktop telescopic reading and writing device, it exchanges data with the first image source 33.

[0075] The desktop telescopic reading and writing device also has two optical paths, wherein the light transmitted from the desktop direction through the second beam splitter 36 is emitted to the first beam splitter 31 and is split, wherein a portion of the light is emitted to the reflector 32, is reflected by the reflector 32, and is emitted to the first beam splitter 31 again, and after being split by the first beam splitter 31, is emitted to the exit pupil position 35 to form a first image; the light emitted from the first image source 33 is split by the first beam splitter 31 and is emitted to the second beam splitter 36, and after being reflected by the second beam splitter 36, is split by the first beam splitter 31 and reflected by the reflector 32, and is emitted to the first beam splitter 31 again, and after being split by the first beam splitter 31, is emitted to the exit pupil position to form a second image.

[0076] When the desktop telescopic reading and writing device uses two beam splitters, since the first beam splitter 31 is shared multiple times, a polarizing film system is preferably used to improve light energy utilization and reduce stray light.

[0077] like Figure 8 and Figure 9As shown, a first polarizing beam splitter film 37 and a first quarter-wave plate 38 are attached to the surface of the first beam splitter 31, with the first quarter-wave plate 38 being closer to the second beam splitter 36. A beam splitter film 43 is also attached to the surface of the second beam splitter 36, disposed on the surface of the second beam splitter 36 facing the first beam splitter 31. When the reflector 32 is in a vertical position, a second polarizing beam splitter film 41 and a second quarter-wave plate 42 are further disposed below the beam splitter film 43, with the second quarter-wave plate 42 being located between the beam splitter film 43 and the second polarizing beam splitter film 41. The transmission polarization directions of the first polarizing beam splitter film 37 and the second polarizing reflective film 41 are perpendicular to each other. This description will be made using the example of the first polarizing beam splitter film 37 transmitting P-type linear polarized light and reflecting S-type linear polarized light, and the second polarizing beam splitter film 41 transmitting S-type linear polarized light and reflecting P-type linear polarized light.

[0078] At this time, taking a book placed on the table as an example, the light reflected from the table is emitted to the second beam splitter 36. After passing through the second polarization beam splitter film 41, the light becomes S-type linear polarized light. After passing through the second quarter-wave plate 42, it becomes left-handed circularly polarized light LCP. Then, it passes through the beam splitter film 43 and is emitted to the first beam splitter 31. After passing through the first quarter-wave plate 38, it becomes S-type linear polarized light and is reflected by the first polarization beam splitter film 37. After passing through the first quarter-wave plate 38, it becomes left-handed circularly polarized light LCP. Then, it is reflected by the reflector 32 and becomes right-handed circularly polarized light RCP. After passing through the first quarter-wave plate 38, it becomes P-type linear polarized light, passes through the first polarization beam splitter film 37, and is emitted to the exit pupil position 35.

[0079] When the second image source 34 is placed on the desktop, such as Figure 8 As shown, the second image source 34 can emit S-type linear polarized light. The S-type linear polarized light passes through the second polarization splitter film 41. The subsequent transmission light path and polarization state change are the same as the transmission light path and polarization state change of the light reflected from the desktop after passing through the second polarization splitter film 41 and becoming S-type linear polarized light, and will not be repeated here.

[0080] like Figure 9 As shown, the first image source 33 located in the horizontal position emits P light and directs it to the first beam splitter 31, passes through the first polarization beam splitting film 37, and becomes right circularly polarized light RCP after passing through the first quarter wave plate 38, and then directs it to the second beam splitter 36, is reflected by the second beam splitter film 43 and becomes left polarized light LCP, and then directs it to the first beam splitter 31, passes through the first quarter wave plate 38 and becomes S-type linear polarized light and is reflected by the first polarization beam splitting film 37, passes through the first quarter wave plate 38 and becomes left circularly polarized light LCP, and then is reflected by the reflector 32 and becomes right circularly polarized light RCP, and passes through the first quarter wave plate 38 and becomes P-type linear polarized light, passes through the first polarization beam splitting film 37, and directs it to the exit pupil position 35.

[0081] Table 1 and Table 2 show the design parameters of the two optical paths in this embodiment.

[0082] Table 1 Parameters of the first optical path

[0083] Surface marking Surface type Radius (mm) Thickness (mm) Alpha tilt (°) Physical Surface spherical surface unlimited -5000 0 Aperture 35 spherical surface unlimited 320 0 32 spherical surface -820 120 0 31 spherical surface unlimited 270 -45 34 spherical surface unlimited 0 -45

[0084] Table 2 Parameters of the second optical path

[0085]

[0086]

[0087] In addition, the positions of the reflector 32 and the first image source 33 can be interchanged. In this case, the polarizing film system on the surface of the first beam splitter 31 and the second beam splitter 36 needs to be redesigned. It can be understood that its purpose is to allow the reflected light from the first image source 33, the second image source 34 and the book placed on the table to form an enlarged image at the exit pupil position after reflection and refraction. The polarizing film system will not be described here.

[0088] The present invention also provides a control method for the above-mentioned desktop telescopic reading and writing device, comprising a dual-light path optical system consisting of a first beam splitter 31, a second beam splitter 36, a reflector 32, a first image source 33, and a second image source 34, wherein the reflector 32 and the first image source 33 are respectively arranged on both sides of the first beam splitter 31, and the second image source 34 is configured to be arranged on the desktop and provide light to the first beam splitter, the second image source 34 and the first image source 33 are located on the same side or on the opposite side of the first beam splitter 31, and the second image source 34 and the first image source 33 perform data transmission. Interaction; the light emitted by the first image source is split by the first beam splitter and the second beam splitter, and then split by the first beam splitter again, and then reflected by the reflector and split by the first beam splitter again, and then emitted to the exit pupil position to form a second image; the light emitted by the second image source is split by the second beam splitter and the first beam splitter in sequence, and then reflected by the reflector and split by the first beam splitter again, and then emitted to the exit pupil position to form a first image; the first image source and the second image source display images simultaneously or alternately to realize the visual training function.

[0089] In summary, the desktop telescopic reading and writing device with a display light path provided by the present invention includes: an optical system consisting of at least a first spectroscope, a reflector, and a first image source, wherein the reflector and the first image source are respectively arranged on both sides of the first spectroscope; light emitted from the desktop direction toward the first spectroscope is split, wherein a portion of the light is emitted toward the reflector, and after being reflected by the reflector, it is emitted toward the first spectroscope again, and after being split by the first spectroscope, it is emitted toward the exit pupil position to form a first image; light emitted from the first image source is split by the first spectroscope and then emitted toward the exit pupil position to form a second image. The desktop telescopic reading and writing device, by adding at least one image source, adds a display light path to the desktop writing scene, can perform defocus stimulation or contrast control while reading and writing, and combined with a second image source placed on the desktop and interacting with the first image source for data, can realize a visual training function, thereby increasing the diversity of myopia prevention and control solutions.

[0090] The above describes in detail the desktop telescopic reading and writing device with a display optical path and the control method provided by the present invention. For those skilled in the art, any obvious modification made to the present invention without departing from the essence of the present invention will constitute an infringement of the patent rights of the present invention and will result in corresponding legal liability.

Claims

1. A desktop telescopic reading and writing device with a display optical path, characterized in that: include: An optical system consisting of at least a first beam splitter, a reflector, and a first image source, wherein the reflector and the first image source are respectively arranged on both sides of the first beam splitter and are perpendicular to each other; Light directed from the desktop to the first beam splitter is split, with a portion of the light directed to the reflector, reflected by the reflector, and then directed to the first beam splitter again. After being split by the first beam splitter, the light is directed to the exit pupil position, forming a first image. The light emitted from the first image source is split by the first beam splitter and then emitted to the exit pupil position to form a second image; The first image source is fixedly or detachably arranged inside the desktop telescopic reading and writing device, and can be turned off under the control of the reading and writing device when not in use. When in use, because it is placed inside the reading and writing device, it should preferentially start executing a predetermined display program or can only work in a specific display mode so that the first image and the second image have at least partially different image information.

2. The desktop telescopic reading and writing device according to claim 1, characterized in that: The first image is located at a position not less than 1 meter in front of the exit pupil position.

3. The desktop telescopic reading and writing device according to claim 1, characterized in that: The second image is located no more than 1 meter in front of the exit pupil position.

4. The desktop telescopic reading and writing device according to claim 1, characterized in that: A lens or lens group with positive optical power is provided on the side of the first image source facing the first beam splitter.

5. The desktop telescopic reading and writing device according to any one of claims 1 to 4, characterized in that Also includes: The second image source is configured to be placed on a desktop and provide light to the first beam splitter, and the second image source exchanges data with the first image source.

6. The desktop telescopic reading and writing device according to claim 5, characterized in that: A first polarization splitter film is attached to either side surface of the first beam splitter, the first polarization splitter film transmits the first linear polarized light and reflects the second linear polarized light, a first quarter-wave plate is arranged between the first beam splitter and the reflector, and the first quarter-wave plate is closer to the reflector than the first polarization splitter film.

7. The desktop telescopic reading and writing device according to claim 6, characterized in that: The first image source is vertically arranged, and the first image source and the second image source simultaneously provide first linearly polarized light.

8. The desktop telescopic reading and writing device according to claim 6, characterized in that: The first image source is arranged horizontally, and is used to provide a second linearly polarized light; The second image source is used to provide second linearly polarized light or circularly polarized light, wherein the circularly polarized light forms second linearly polarized light after passing through the first quarter-wave plate.

9. The desktop telescopic reading and writing device according to claims 1-4, characterized in that Also includes: a second beam splitter, arranged horizontally below the first beam splitter; The light transmitted from the desktop through the second beam splitter is directed to the first beam splitter and split. A portion of the light is directed to the reflector, reflected by the reflector, and then directed to the first beam splitter again. After being split by the first beam splitter, the light is directed to the exit pupil position to form a first image. The light emitted from the first image source is split by the first beam splitter and then emitted to the second beam splitter. After being reflected by the second beam splitter, the light is split by the first beam splitter and reflected by the reflector before being emitted to the first beam splitter. After being split by the first beam splitter, the light is emitted to the exit pupil position to form a second image.

10. A control method for a desktop telescopic reading and writing device, characterized in that: A dual-light-path optical system comprising at least a first beam splitter, a reflector, a first image source, and a second image source, wherein the reflector and the first image source are respectively arranged on both sides of the first beam splitter, and the second image source is configured to be arranged on a desktop and provide light to the first beam splitter, and the second image source and the first image source exchange data; The light emitted by the first image source is split by the first beam splitter and then emitted to the exit pupil position to form a second image; The light from the second image source directed toward the first beam splitter is split, reflected by the reflector, and then split again by the first beam splitter before being directed toward the exit pupil to form a first image; The first image source and the second image source display images simultaneously or alternately.

Images