Sitting posture monitoring desktop far image read-write device

Abstract

The utility model discloses a desktop far image read-write device for sitting posture monitoring. The desktop far image read-write device comprises a far image optical system, a distance sensor, a controller and an output device. Wherein the distance sensor is arranged on the front side of the desktop remote image read-write device, faces the exit pupil position and is used for collecting the distance d between a user and the desktop remote image read-write device; and the controller is used for comparing the distance d between the user and the desktop remote image read-write equipment with the exit pupil distance range of the desktop remote image read-write equipment, and outputting prompt information outwards through the output module when the distance d between the user and the desktop remote image read-write equipment is not in the exit pupil distance range of the desktop remote image read-write equipment. The distance sensor is arranged on the front side of the desktop remote image read-write device, the distance d between the user and the desktop remote image read-write device is collected, the sitting posture of the user is monitored, and the myopia prevention and control effect of the user is enhanced.

Description

Technical Field

[0001] The utility model relates to a sitting posture monitoring desktop telescopic reading and writing device. Background Art

[0002] Myopia is a growing problem among teenagers. The root cause is that teenagers spend most of their time focusing on close-up objects. To adapt to close-up imaging, their eye axes gradually lengthen. To address this issue, various myopia prevention and control products have emerged on the market.

[0003] Desktop telephoto reading and writing devices, which use optical means to extend close-range reading and writing to distant imaging, are often used in the prevention and control of myopia in adolescents. The sitting posture of adolescents while reading and writing is a key factor affecting their development. Poor sitting posture can easily lead to hunchbacks and myopia. Monitoring the sitting posture of users using desktop reading and writing devices can reduce the impact of sitting posture on myopia prevention and control. Summary of the Invention

[0004] The primary technical problem to be solved by the utility model is to provide a sitting posture monitoring desktop telescopic reading and writing device.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A sitting posture monitoring desktop telescopic reading and writing device, comprising a telescopic optical system, a distance sensor, a controller and an output device;

[0007] The telescopic optical system includes a plane beam splitter and a first concave reflector. Light reflected from the tabletop and an object placed on the tabletop is directed toward the plane beam splitter from below and is split at the plane beam splitter to form a first light ray. The first light ray is then reflected by the first concave reflector and, after being transmitted (or reflected) or reflected by the plane beam splitter, is directed toward the exit pupil and forms a virtual image at least three meters in front of the exit pupil.

[0008] A distance sensor is provided in front of the desktop telephoto reading and writing device, facing the exit pupil position, and is used to collect the distance d between the user and the desktop telephoto reading and writing device;

[0009] The controller compares the distance d between the user and the desktop telescopic reading and writing device with the pupil distance range of the desktop telescopic reading and writing device, and outputs a prompt message through an output device when the distance d between the user and the desktop telescopic reading and writing device is not within the pupil distance range of the desktop telescopic reading and writing device.

[0010] Preferably, the output device is one or more of an audio output device, a video output device and a lighting output device.

[0011] Preferably, the pupil distance range has a maximum value and a minimum value, and is symmetrically distributed with the optimal pupil distance of the desktop telescopic reading and writing device as the center.

[0012] Preferably, the exit pupil distance range does not exceed 500 mm.

[0013] Preferably, the exit pupil distance of the telephoto optical system is between 150 mm and 350 mm, the exit pupil aperture is not less than 60 mm, and the diagonal field of view angle is not less than 35° and not more than 48°.

[0014] Preferably, the video output device is arranged on the front side of the desktop telescopic reading and writing device.

[0015] Preferably, the video output device is controlled by a controller, and only lights up the screen for a short time for display after receiving an instruction to output prompt information to the outside, and is in a screen-off state at other times.

[0016] Preferably, the diagonal size of the video output device is no greater than 5 inches.

[0017] Preferably, the video output device uses any one of a monochrome electronic paper display screen, an industrial control screen, an LCD dot matrix screen, and an LCD segment code screen.

[0018] A sitting posture monitoring desktop telescopic reading and writing device, comprising a telescopic optical system, an image acquisition device, a controller and an output device;

[0019] The telescopic optical system includes a plane beam splitter and a first concave reflector. Light reflected from the tabletop and an object placed on the tabletop is directed toward the plane beam splitter from below and is split at the plane beam splitter to form a first light ray. The first light ray is then reflected by the first concave reflector and, after being transmitted (or reflected) by the plane beam splitter, is directed toward the exit pupil and forms a virtual image at least three meters in front of the exit pupil.

[0020] An image acquisition device is provided in front of the desktop telephoto reading and writing device, facing the exit pupil position, and is used to acquire an image of the user's sitting posture;

[0021] The controller analyzes the sitting posture image to determine whether the user is within the pupil distance range of the desktop telephoto reading and writing device, and outputs a prompt message through an output device when the distance d between the user and the desktop telephoto reading and writing device is not within the pupil distance range of the desktop telephoto reading and writing device.

[0022] The desktop telephoto reading and writing device provided by the utility model adds a distance sensor on the front side of the desktop telephoto reading and writing device. The distance sensor detects the distance d between the user and the desktop telephoto reading and writing device and compares the distance d with the pupil distance range of the desktop telephoto reading and writing device. When the distance d between the user and the desktop telephoto reading and writing device is not within the pupil distance range, a voice, light or image prompt is given. By monitoring the user's sitting posture, the myopia prevention and control effect can be enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of a desktop telephoto reading and writing device;

[0024] Figure 2 It is a schematic diagram of the electronic control part of the desktop telephoto reading and writing device;

[0025] Figure 3 This is a parameter diagram of a desktop telephoto reading and writing device. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] 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.

[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 number of the indicated technical features. Therefore, the features specified as "first" or "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.

[0029] like Figure 1As shown, the desktop telephoto reading and writing device 1 provided by the present application is implemented based on a coaxial optical system, including a telephoto optical system disposed within a housing. The telephoto optical system may include only a telephoto optical path, or may include both a telephoto optical path and a defocused optical path. Both the telephoto optical path and the defocused optical path are implemented based on a Birdbath (BB) optical path.

[0030] In a desktop telephoto reading and writing device with a defocusing function, two BB optical paths share a plane beam splitter. Light reflected by the desktop (and an object placed on the desktop, such as a book) is emitted from below toward the plane beam splitter and is split at the position of the plane beam splitter. The first light (reflected light) formed after the plane beam splitter is reflected by the first concave reflector, and then passes through the plane beam splitter and is emitted toward the exit pupil position. The second light (transmitted light) formed after the plane beam splitter is reflected by the second concave reflector, and after being reflected by the plane beam splitter, is emitted toward the exit pupil position. The first light and the second light form different optical paths respectively. 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.

[0031] Among them, the first light ray emitted to the exit pupil position after being reflected by the first concave reflector is formed at a virtual image position in front of the human eye (i.e. in front of the exit pupil position) at a distance of not less than 3 meters from the exit pupil position, which is used for normal viewing by the human eye. At this time, the light enters the human eye and forms an image on the retina of the human eye, and the light path corresponding to the first concave reflector is the far image light path; and the second light ray emitted to the exit pupil position after being reflected by the second concave reflector forms a defocused image on the side opposite to the aforementioned virtual image position (i.e. behind the exit pupil position) relative to the exit pupil position, forming a positive defocus light path. The visual acuity corresponding to the positive defocus light path can be controlled between +1D and +5D. After the light in the positive defocus light path enters the human eye, it forms an image in front of the retina of the human eye, presenting a myopic defocus state, thereby achieving defocus stimulation, which is helpful for the prevention and control of myopia.

[0032] To achieve different focal plane positions for the two optical paths, the first and second concave reflectors can have the same surface parameters but different distances from the plane beam splitter. Alternatively, the first and second concave reflectors can be at the same distance from the plane beam splitter but have different radii of curvature. The methods for achieving telephoto imaging and positive defocused imaging using the two optical paths are not limited herein.

[0033] In the above embodiment, the first concave reflector for telephoto imaging is arranged vertically, and the light reflected by the plane beam splitter is directed toward the first concave reflector; the second concave reflector for defocused imaging is arranged horizontally, and the light transmitted through the plane beam splitter is directed toward the second concave reflector; it can be understood that in other embodiments, the first concave reflector can also be arranged horizontally, and the second concave reflector can be arranged vertically.

[0034] In a desktop telephoto reading and writing device without a defocusing function, it only includes a single BB optical path consisting of a plane beam splitter and a first concave reflector. The light reflected by the desktop (and an object placed on the desktop, such as a book) is emitted from below toward the plane beam splitter and is split at the position of the plane beam splitter; the first light (transmitted light or reflected light) formed after the plane beam splitter is reflected by the first concave reflector, and then after reflection (or transmission) by the plane beam splitter, it is emitted toward the exit pupil position and forms an image on the retina of the human eye; the reflection or transmission of the light depends on the arrangement of the first concave reflector.

[0035] like Figure 1 and Figure 2 As shown, a desktop telescopic reading and writing device 1 is set on a desktop via a bracket 2, and the position of the desktop telescopic reading and writing device 1 relative to the desktop is adjustable. A distance sensor 3 is provided on the front side of the desktop telescopic reading and writing device 1 for collecting the distance d between the user and the desktop telescopic reading and writing device. A controller 10 and an output device are also provided in the desktop telescopic reading and writing device 1, and the distance sensor 3 and the output device are electrically connected to the controller 10 respectively. The output device can be an audio output device (for example, a speaker 5), a video output device (for example, a display screen 4) or a light output device (for example, a prompt light 6), or a combination thereof.

[0036] Distance sensor 3 is located on the front side of the desktop telephoto reader / writer 1, facing the exit pupil, which corresponds to the user's optimal position. Distance sensor 3 is used to measure the distance d between the user and the desktop telephoto reader / writer 1. Distance sensor 3 can use infrared, millimeter wave, ultrasonic, laser, LED, or other signals to measure the real-time distance between the user and the desktop telephoto reader / writer 1.

[0037] The controller 10 is configured to receive signals from the distance sensor 3 to determine the distance d between the user and the desktop telephoto reader / writer. The controller 10 compares the distance d with the eye-opening distance of the desktop telephoto reader / writer. If the distance d is not within the eye-opening distance, the controller 10 outputs a prompt message via an output device. The distance value comparison can be achieved by comparing current or potential differences, thereby implementing the determination process via circuit chip hardware.

[0038] The pupil distance range of each desktop telephoto reading and writing device (d min ,d max ) is pre-stored in the controller 10, d min is the minimum exit pupil distance, d max is the maximum exit pupil distance.min and d max The distribution is symmetrical with the optimal pupil distance of the desktop telephoto reading and writing device 1 as the center. Preferably, the pupil distance range does not exceed 500mm, that is, d max Preferably, the exit pupil distance of the telephoto optical system is between 150 mm and 350 mm, the exit pupil aperture is not less than 60 mm, and the diagonal field of view is not less than 35° and not more than 48°.

[0039] Among the above-mentioned output devices, it is preferred to use a video output device for output, and the video output device is arranged on the front side of the desktop telescopic reading and writing device 1, facing the exit pupil position. The video output device uses a small-sized display screen with a diagonal size of no more than 5 inches (for example, a 3.5-inch display screen); from the perspective of cost control, a monochrome screen or a black and white ink screen can be used, such as a monochrome electronic paper display screen, an industrial control screen, an LCD dot matrix screen, an LCD segment code screen, etc., and the use of the display screen is not restricted here. In order to avoid the display screen irradiating the human eye for a long time, the display screen is preferably a display screen with a screen-off function. The display screen is controlled by a controller and only lights up the screen for a short time for display after receiving an instruction to output a prompt message to the outside, and is in a screen-off state at other times.

[0040] The display screen is preferably arranged on the front side of the desktop telescopic reading and writing device, emitting light toward the exit pupil position, being independent of the telescopic image optical path and the defocused optical path, and forming images in different areas of the human eye's field of view; the display screen can also be arranged on the rear side of the desktop telescopic reading and writing device 1 and facing the exit pupil position through the plane beam splitter, so that the image of the display screen can be directly superimposed on the telescopic image for display, and the telescopic optical system has no optical effect on the light emitted by the display screen and does not have a magnifying function for the image on the display screen.

[0041] The controller 10 is disposed within the desktop telephoto reader / writer 1. As the electronic control portion of the desktop telephoto reader / writer 1, the distance sensor 3, the video output device, the audio output device, the light output device (if any), and the controller 10 are preferably disposed in the same area of ​​the desktop telephoto reader / writer 1. Because the desktop telephoto reader / writer 1 requires an illumination source, the illumination source is typically disposed at the bottom of the desktop telephoto reader / writer 1, with the distance sensor 3, the video output device, the audio output device, the light output device (if any), and the controller 10 disposed close to the illumination source.

[0042] The present invention also provides another sitting posture monitoring desktop telephoto reading and writing device, including a telephoto optical system, an image acquisition device, a controller and an output device; wherein the telephoto optical system is the same as the telephoto optical system in the above embodiment; an image acquisition device (such as a camera) is set on the front side of the desktop telephoto reading and writing device; the image acquisition device is set on the front side of the desktop telephoto reading and writing device 1, facing the exit pupil position, for acquiring the user's sitting posture image; the image acquisition device, the output device and the controller are electrically connected; the controller analyzes the sitting posture image to determine whether the user is within the exit pupil distance range of the desktop telephoto reading and writing device, and when the distance d between the user and the desktop telephoto reading and writing device is not within the exit pupil distance range of the desktop telephoto reading and writing device, the controller outputs a prompt information to the outside through the output device. The output device can also use an audio output device, a video output device or a light output device, or a combination of two or three thereof. The above controller can also directly judge the sitting posture in the sitting posture image to determine whether the user's sitting posture is an unhealthy sitting posture, and prompt the user when an unhealthy sitting posture occurs. This monitoring method is not described in detail here.

[0043] To sum up, the sitting posture monitoring desktop telescopic reading and writing device provided by the present invention adds a distance sensor, a controller and an output device to the desktop telescopic reading and writing device. The distance sensor collects the distance between the user and the desktop telescopic reading and writing device, determines whether the user is in a suitable usage position, and gives prompts in a timely manner, thereby realizing the monitoring of the user's sitting posture, which can enhance the myopia prevention and control effect of the desktop telescopic reading and writing device.

[0044] The above is a detailed description of the sitting posture monitoring desktop telephoto reading and writing device provided by the present invention. For those skilled 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 rights of the present invention and will result in corresponding legal liability.

Claims

1. A sitting posture monitoring desktop telephoto reading and writing device, characterized in that: Includes telescopic optical system, distance sensor, controller and output device; The telescopic optical system includes a plane beam splitter and a first concave reflector. Light reflected from the tabletop and an object placed on the tabletop is directed from below toward the plane beam splitter and is split at the plane beam splitter to form a first light ray. The first light ray is then reflected by the first concave reflector and directed toward the exit pupil through the plane beam splitter, forming a virtual image at least three meters in front of the exit pupil. A distance sensor is provided in front of the desktop telephoto reading and writing device, facing the exit pupil position, and is used to collect the distance d between the user and the desktop telephoto reading and writing device; The controller compares the distance d between the user and the desktop telescopic reading and writing device with the pupil distance range of the desktop telescopic reading and writing device, and outputs a prompt message through an output device when the distance d between the user and the desktop telescopic reading and writing device is not within the pupil distance range of the desktop telescopic reading and writing device.

2. The sitting posture monitoring desktop telephoto reading and writing device according to claim 1, characterized in that: The output device is one or more of an audio output device, a video output device, and a lighting output device.

3. The sitting posture monitoring desktop telephoto reading and writing device according to claim 1, characterized in that: The pupil distance range has a maximum value and a minimum value, and is symmetrically distributed with the optimal pupil distance of the desktop telescopic reading and writing device as the center.

4. The sitting posture monitoring desktop telephoto reading and writing device according to claim 1, characterized in that: The exit pupil distance range does not exceed 500 mm.

5. The sitting posture monitoring desktop telephoto reading and writing device according to claim 1, characterized in that: The exit pupil distance of the telephoto optical system is between 150 mm and 350 mm, the exit pupil aperture is not less than 60 mm, and the diagonal field of view angle is not less than 35° and not more than 48°.

6. The sitting posture monitoring desktop telephoto reading and writing device according to claim 2, characterized in that: The video output device is arranged on the front side of the desktop telescopic reading and writing device.

7. The sitting posture monitoring desktop telephoto reading and writing device according to claim 2, characterized in that: The video output device is controlled by the controller and only lights up the screen for a short time to display after receiving an instruction to output prompt information to the outside, and is in the screen-off state at other times.

8. The sitting posture monitoring desktop telephoto reading and writing device according to claim 2, characterized in that: The diagonal size of the video output device is no greater than 5 inches.

9. The sitting posture monitoring desktop telephoto reading and writing device according to claim 2, characterized in that: The video output device uses any one of a monochrome electronic paper display screen, an industrial control screen, an LCD dot matrix screen, and an LCD segment code screen.

10. A sitting posture monitoring desktop telephoto reading and writing device, characterized in that: It includes telescopic optical system, image acquisition device, controller and output device; The telescopic optical system includes a plane beam splitter and a first concave reflector. Light reflected from the tabletop and an object placed on the tabletop is directed toward the plane beam splitter from below and is split at the plane beam splitter to form a first light ray. The first light ray is then reflected by the first concave reflector and, after being transmitted or reflected by the plane beam splitter, is directed toward the exit pupil and forms a virtual image at least three meters in front of the exit pupil. An image acquisition device is provided in front of the desktop telephoto reading and writing device, facing the exit pupil position, and is used to acquire an image of the user's sitting posture; The controller analyzes the sitting posture image to determine whether the user is within the pupil distance range of the desktop telephoto reading and writing device, and outputs a prompt message through an output device when the distance d between the user and the desktop telephoto reading and writing device is not within the pupil distance range of the desktop telephoto reading and writing device.

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