Remote display device

Abstract

The utility model provides a remote display device. The remote display device comprises a cavity shell, a display screen, a semi-reflecting and semi-transmitting beam splitter and a reflector. The cavity shell is provided with a light incident side, a display side and a light reflecting side, the cavity shell is provided with a light incident wall on the light incident side, and a light incident opening is formed in the light incident wall. Light emitted by the display screen enters the cavity shell from the light inlet. The semi-reflecting and semi-transmitting beam splitter is installed on the display side of the cavity shell and receives and reflects light emitted by the display screen. The reflecting mirror is installed on the light reflecting side of the cavity shell and faces the semi-reflecting and semi-transmitting beam splitter, and light reflected by the semi-reflecting and semi-transmitting beam splitter is reflected back to the semi-reflecting and semi-transmitting beam splitter again and transmitted out of the semi-reflecting and semi-transmitting beam splitter. Wherein at least one part or the whole area of the inner surface of the cavity shell is provided with an extinction structure. The extinction structure with light absorption capability is arranged on the inner surface of the cavity shell, so that the transmission of stray light in the cavity shell can be avoided or reduced, and the myopia prevention and control effect is improved.

Description

Technical Field

[0001] This application relates to the field of electronic display technologies, and particularly to a remote display device. Background Art

[0002] Excessive near-eye use is an important cause of the development of myopia in children. In related technologies, changing a near-distance object into a virtual image at a far distance through optical methods, that is, an optical remote display device, is an effective means for preventing and controlling myopia.

[0003] However, although the related remote display devices can achieve the magnification and remoteness of the virtual image, there are still some stray lights caused by non-designed optical paths, which may result in children not seeing entirely remote images, thus affecting the actual effect of myopia prevention and control. Summary of the Utility Model

[0004] This application provides a remote display device for improving the effect of myopia prevention and control.

[0005] A remote display device provided by an embodiment of this application includes:

[0006] A cavity housing having a light incident side, a display side, and a light reflecting side. The cavity housing is provided with a light incident wall on the light incident side, and a light incident opening is formed on the light incident wall;

[0007] A display screen, the light emitted by which enters the cavity housing from the light incident opening;

[0008] A semi-transmissive semi-reflective beam splitter installed on the display side of the cavity housing to receive and reflect the light emitted by the display screen;

[0009] A reflector installed on the light reflecting side of the cavity housing and arranged facing the semi-transmissive semi-reflective beam splitter to reflect the light reflected by the semi-transmissive semi-reflective beam splitter back to the semi-transmissive semi-reflective beam splitter and transmit it out from the semi-transmissive semi-reflective beam splitter;

[0010] Wherein, at least a part or all regions of the inner surface of the cavity housing are provided with a light extinction structure.

[0011] In some embodiments, the light incident wall has an inner surface and an outer surface. The inner surface of the light incident wall faces the semi-transmissive semi-reflective beam splitter, and the outer surface of the light incident wall is farther from the semi-transmissive semi-reflective beam splitter than the inner surface of the light incident wall;

[0012] The light extinction structure is provided on the inner surface and / or the outer surface of the light incident wall.

[0013] In some embodiments, the cavity housing includes two side walls opposite to each other, and each side wall is connected between the display side and the light reflecting side;

[0014] The light extinction structure is provided on the inner surface of each side wall.

[0015] In some embodiments, the light extinction structure includes light extinction velvet, light extinction paint, light extinction sand, and / or light extinction texture.

[0016] In some embodiments, the display screen is provided with a narrow light structure for narrowing the light on the periphery of the display screen.

[0017] In some embodiments, the narrow light structure includes an anti-peeping film, a retroreflective prism film, a microlens array, and / or a mirror array.

[0018] In some embodiments, the display screen is an LCD display screen including a backlight module, and an anti-peeping film or a retroreflective prism film is provided on the light-emitting side of the backlight module.

[0019] In some embodiments, the mirror includes a curved mirror for magnifying an image.

[0020] In some embodiments, the remote display device further includes a convex lens for correcting distortion, and the convex lens is disposed between the display screen and the semi-transmissive semi-reflective beam splitter.

[0021] In some embodiments, the remote display device further includes a base, a control circuit board is disposed inside the base, and the base is mounted on the light-incident side of the cavity housing.

[0022] The remote display device provided by the embodiments of the present application can avoid or reduce the propagation of stray light in the cavity housing by providing a light extinction structure with light absorption ability on at least a part or all regions of the inner surface of the cavity housing, thereby improving the myopia prevention and control effect.

[0023] Furthermore, by providing a narrow light structure for narrowing the light on the periphery of the display screen at the display screen, the stray light caused by the wide viewing angle of the display screen can be reduced, thereby further improving the myopia prevention and control effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of one angle of a remote display device provided by an exemplary embodiment of the present application;

[0025] Figure 2 is a perspective view of another angle of a remote display device provided by an exemplary embodiment of the present application;

[0026] Figure 3 is a sectional view of a remote display device provided by an exemplary embodiment of the present application;

[0027] Figure 4 is a perspective exploded view of one angle of a remote display device provided by an exemplary embodiment of the present application;

[0028] Figure 5It is a perspective three-dimensional view of a cavity housing in a remote display device provided by an exemplary embodiment of the present application. Detailed implementation manners

[0029] Here, the technical solutions in the embodiments (or "implementation manners") of the present application will be clearly and completely described in conjunction with the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movement conditions between components in a specific posture; if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0031] Figure 1 It is a perspective three-dimensional view of a remote display device provided by an exemplary embodiment of the present application. Figure 2 It is a perspective three-dimensional view of another perspective of the remote display device. Figure 3 It is a sectional view of the remote display device. Figure 4 It is a perspective exploded view of a perspective of the remote display device. Figure 5 It is a perspective three-dimensional view of a cavity housing in the remote display device.

[0032] As Figures 1 to 5 shown, the remote display device 100 provided by the embodiment of the present application includes a cavity housing 20, a display screen 30, a semi-transmissive semi-reflective beam splitter 40, and a reflector 50. Among them, the cavity housing 20 has a light incident side 21 (that is, the side close to the bottom of the cavity housing 20), a display side 23 (that is, the side close to the front of the cavity housing 20), and a light reflecting side 25 (that is, the side close to the rear of the cavity housing 20). The cavity housing 20 is provided with a light incident wall 22 on the light incident side 21, and a light incident port 223 is opened on the light incident wall 22.

[0033] The display screen 30 serves as an image source. The light L1 emitted by the display screen 30 can enter the interior of the cavity housing 20 from the light incident port 223. The semi-transmissive semi-reflective beam splitter 40 is installed on the display side 23 of the cavity housing 20. The semi-transmissive semi-reflective beam splitter 40 receives and can reflect the light L1 emitted by the display screen 30. Of course, a small part of the light L1 emitted by the display screen 30 may directly pass through the semi-transmissive semi-reflective beam splitter 40.

[0034] The mirror 50 is installed on the reflective side 25 of the cavity housing 20 and is arranged facing the semi-reflective and semi-transmissive beam splitter 40, for reflecting the light L2 reflected by the semi-reflective and semi-transmissive beam splitter 40 back to the semi-reflective and semi-transmissive beam splitter 40 again. At least a part of the light L3 reflected back by the mirror 50 can pass through the semi-reflective and semi-transmissive beam splitter 40 and enter the user's eyes, thereby forming a virtual image at a certain distance from the human eye. Another part of the light L3 reflected back by the mirror 50 may be reflected back into the interior of the cavity housing 20 by the semi-reflective and semi-transmissive beam splitter 40 again.

[0035] The inventor(s) of the present application found that the light reflected back into the interior of the cavity housing 20 by the semi-reflective and semi-transmissive beam splitter 40 will ultimately form stray light that affects normal display. In addition, the existing display screen 30 is usually designed with a wide viewing angle, while the light angles required by the remote display device 100 are usually small. The light outside the required angle will also form stray light or virtual images through abnormal light paths. These stray lights interfere with the display effect, and the formed stray light or virtual images are usually closer to the viewer than the main image, thus having an adverse effect on the effect of preventing and controlling myopia.

[0036] To eliminate or reduce the above-mentioned stray light or virtual images, and thus improve the effect of myopia prevention and control, a light-absorbing extinction structure 90 can be provided on at least a part or all regions of the inner surface of the cavity housing 20. The setting of the above-mentioned extinction structure 90 can avoid or reduce the propagation of stray light in the cavity housing 20, thereby improving the effect of myopia prevention and control.

[0037] In some embodiments, the extinction structure 90 is extinction velvet. The extinction velvet can be fixed to the inner surface of the cavity housing 20 by pasting. In some embodiments, the extinction structure 90 is extinction paint. The extinction paint can be fixed to the inner surface of the cavity housing 20 by spraying. In some embodiments, the extinction structure 90 is extinction sand. The extinction sand can be fixed to the inner surface of the cavity housing 20 by spraying. In some embodiments, the extinction structure 90 is an extinction etching pattern. The extinction etching pattern can be formed on the inner surface of the cavity housing 20 by corrosion or etching. The capillary structures formed by extinction velvet, extinction paint, extinction sand and extinction etching patterns have a good absorption effect on stray light, so as to achieve a good extinction effect. Among them, the absorption effect of extinction velvet on stray light is the most obvious, and the light reflectivity of the inner surface of the cavity housing 20 can be reduced to only 0.2% - 0.09%.

[0038] In some embodiments, the light-incident wall 22 has an inner surface 225 and an outer surface (not shown in the figure). The inner surface 225 of the light-incident wall 22 faces the semi-transmissive semi-reflective beam splitter 40, and the outer surface of the light-incident wall 22 is farther from the semi-transmissive semi-reflective beam splitter 40 than the inner surface 225 of the light-incident wall 22. The extinction structure 90 is provided on the inner surface 225 and / or the outer surface of the light-incident wall 22. Among them, the extinction structure 90 provided on the inner surface 225 of the light-incident wall 22 can reduce the stray light in the cavity housing 20. The extinction structure 90 provided on the outer surface of the light-incident wall 22 can reduce the stray light between the light-incident wall 22 and the display screen 30.

[0039] In some embodiments, the cavity housing 20 includes two side walls 26 opposite to each other, and each side wall 26 is connected between the display side 23 and the reflective side 25. The extinction structure 90 is provided on the inner surface of each side wall 26. The extinction structure 90 provided on the inner surface of the side wall 26 can also reduce the stray light in the cavity housing 20.

[0040] Since the appearance of a part of the stray light is caused by the wide viewing angle of the display screen 30, this part of the stray light can be reduced by providing a narrow-light structure (not shown in the figure) for narrowing the light on the periphery of the display screen 30 at the display screen 30, thereby improving the myopia prevention and control effect. The narrow-light structure is used to narrow the light-emitting angle of the display screen 30.

[0041] In some embodiments, the narrow-light structure is an anti-peeping film. In some embodiments, the narrow-light structure is a reverse prism film. In some embodiments, the narrow-light structure is a microlens array. In some embodiments, the narrow-light structure is a mirror array.

[0042] In some embodiments, the display screen 30 is an OLED screen, a Mini-LED screen, a Micro-OLED screen, a Micro-LED screen, a DLP optical engine, or other types of projection optical engines, etc. For different display screens, the forms used as the narrow-light structure can be different. For example, self-luminous display screens such as OLED, Micro-OLED screens, and Micro-LEDs usually adopt the method of attaching an anti-peeping film or a microlens array on the surface; for projection optical engines, whether it is a single LCD, 3LCD, LCos, DLP, etc. projection optical engines, the form of lens light collection is usually adopted; for LCD display screens and LCD display screens with mini-led backlights, the form of setting an anti-peeping film, a reverse prism film, a microlens array, or a light cup in the backlight module is usually adopted for light path narrowing, and of course, the form of directly attaching an anti-peeping film on the surface is also possible.

[0043] In some embodiments, the display screen 30 is an LCD display screen including a backlight module. An anti-peeping film, a retroreflective prism film, a microlens array, a mirror array, etc. as a narrow light structure can be disposed on the light-emitting side of the backlight module. To save costs, the anti-peeping film or the retroreflective prism film can be used as the narrow light structure and disposed on the light-emitting side of the backlight module.

[0044] In some embodiments, the mirror 50 includes a curved mirror. The curved mirror is used to magnify an image, so that the remote display device 100 presents a larger image at the human eye when pulled away.

[0045] In some embodiments, the remote display device 100 further includes a convex lens 70 for correcting image distortion. The convex lens 70 is disposed between the display screen 30 and the semi-transmissive semi-reflective beam splitter 40, such that the light emitted from the display screen 30 first passes through the correction of the convex lens 70 and then reaches the semi-transmissive semi-reflective beam splitter 40. The setting of the convex lens 70 is not necessary, but it is beneficial to improve the display effect.

[0046] In some embodiments, the remote display device 100 further includes a base 80. A control circuit board 83 is disposed inside the base 80, and the base 80 is mounted on the light-incident side 21 of the cavity housing 20. The control circuit board 83 can be electrically connected to the display screen 30 for controlling the light emission and display of the display screen 30.

[0047] In some embodiments, the base 80 includes a main body portion 82 located above and a plurality of support feet 84 located below. The display screen 30 and the convex lens 70 can be mounted or disposed on the upper surface of the main body portion 82. The number of the support feet 84 can be four, and are respectively connected to four corners of the lower surface of the main body portion 82. By using the plurality of support feet 84, the remote display device 100 can be stably placed on a tabletop or the ground.

[0048] The plurality of support feet 84 include two front support feet 842 and two rear support feet 844. The lengths of the two front support feet 842 are significantly less than the lengths of the two rear support feet 844, such that the main body portion 82 and the display screen 30 and the convex lens 70 mounted thereon present an obvious forward tilt state. The semi-transmissive semi-reflective beam splitter 40 is also set to be forward tilted, but the tilting angle of the semi-transmissive semi-reflective beam splitter 40 is significantly greater than the tilting angle of the main body portion 82. The mirror 50 is disposed vertically as a whole. The above-mentioned forward tilt settings of the base 80, the display screen 30 and the semi-transmissive semi-reflective beam splitter 40, combined with the vertical setting of the mirror 50, are beneficial to reducing the internal space of the cavity housing 20, such that a long-distance imaging effect can be achieved in a smaller space, thereby reducing the overall size of the remote display device 100.

[0049] In some embodiments, the cavity housing 20 is provided with a mounting wall 24 on the display side 23. The mounting wall 24 can be provided only at the edge of the display side 23. The semi-transmissive semi-reflective beam splitter 40 is attached and fixed to the mounting wall 24. The provision of the mounting wall 24 facilitates the installation and fixation of the semi-transmissive semi-reflective beam splitter 40 and does not affect the reception and reflection of light by the semi-transmissive semi-reflective beam splitter 40.

[0050] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A remote display device, characterized in that, The remote display device includes: A cavity housing having a light incident side, a display side, and a light reflecting side. The cavity housing is provided with a light incident wall on the light incident side, and a light incident opening is formed on the light incident wall; A display screen, the light emitted therefrom enters the cavity housing through the light incident opening; A semi-reflective semi-transmissive beam splitter, installed on the display side of the cavity housing, receiving and reflecting the light emitted by the display screen; A reflector, installed on the light reflecting side of the cavity housing, arranged facing the semi-reflective semi-transmissive beam splitter, reflecting the light reflected by the semi-reflective semi-transmissive beam splitter back to the semi-reflective semi-transmissive beam splitter and transmitting it out through the semi-reflective semi-transmissive beam splitter; Wherein, at least a part or all regions of the inner surface of the cavity housing are provided with an anti-glare structure.

2. The remote display device according to claim 1, wherein The light incident wall has an inner surface and an outer surface. The inner surface of the light incident wall faces the semi-reflective semi-transmissive beam splitter, and the outer surface of the light incident wall is farther from the semi-reflective semi-transmissive beam splitter than the inner surface of the light incident wall; The anti-glare structure is provided on the inner surface and / or the outer surface of the light incident wall.

3. The remote display device according to claim 1, wherein The cavity housing includes two side walls opposite to each other, and each side wall is connected between the display side and the light reflecting side; The anti-glare structure is provided on the inner surface of each side wall.

4. The remote display device according to any one of claims 1 to 3, characterized in that, The anti-glare structure includes anti-glare velvet, anti-glare paint, anti-glare sand, and / or anti-glare etching patterns.

5. The remote display device according to claim 1, characterized in that The display screen is provided with a narrow light structure for narrowing the light on the periphery of the display screen.

6. The remote display device according to claim 5, wherein The narrow light structure includes a privacy film, a retroreflective prism film, a microlens array, and / or a reflector array.

7. The remote display device according to claim 6, wherein The display screen is an LCD display screen including a backlight module, and a privacy film or a retroreflective prism film is provided on the light emitting side of the backlight module.

8. The remote display device according to claim 1, characterized in that The reflector includes a curved reflector for magnifying the image.

9. The remote display device according to claim 1, wherein The remote display device further includes a convex lens for correcting distortion, and the convex lens is provided between the display screen and the semi-reflective semi-transmissive beam splitter.

10. The remote display device according to claim 1, wherein The remote display device further includes a base, a control circuit board is arranged inside the base, and the base is installed on the light incident side of the cavity housing.

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