CN220357326U - Far image display device, learning table and far image display equipment - Google Patents

Abstract

The application discloses a far-image display device, a study table and far-image display equipment, and relates to the technical field of imaging optics. The far image display device comprises an image component and a reflecting mirror group, wherein the image component is provided with a first surface; the reflecting mirror group comprises a first mirror plate and a second mirror plate, wherein the first mirror plate is provided with a first reflecting surface, at least part of the first reflecting surface is opposite to the first surface, the second mirror plate is provided with a second reflecting surface, at least part of the second reflecting surface is opposite to the first reflecting surface, the first surface emits a first light beam, the first light beam sequentially passes through the first reflecting surface and the second reflecting surface to form a second light beam, the reflecting mirror group is further provided with a preset position, and the second light beam penetrates through the preset position. The desktop far image display device provided by the application can give consideration to far image display and reading and writing of books or flat panel display equipment.

Description

Far image display device, learning table and far image display equipment

Technical Field

The application relates to the technical field of imaging optics, in particular to a far-image display device, a learning table and far-image display equipment.

Background

The student group commonly uses equipment such as cell-phone, tablet, computer to carry out net class study, and cell-phone, the study flat-panel display screen that is used often are little and the display screen is short from user's eyes, and long-time closely use eyes to lead to the myopia rate of student higher and higher.

Aiming at the problems, in the prior art, the image of a book or a learning flat plate is converted into a far focus virtual image which is a certain distance away from human eyes through a light path system, so that long-time short-distance eyes can be avoided, and the functions of preventing myopia and protecting eyes are achieved.

However, the far-reaching products on the market at present have some disadvantages. For example, some products have LCD (liquid crystal display ) screens in the devices, and the products have large volume and large weight, so that far-image reading and writing of books cannot be considered; and part of products can be displayed in far images, but the watched pictures have the problems of poor brightness and the like, so that the user experience is poor.

Disclosure of Invention

In view of this, the purpose of this application is in order to overcome the not enough in the prior art, and this application provides a far-image display device, study table and far-image display equipment to solve the technical problem that far-image product among the prior art is bulky, and user watches experience not good.

The present application provides:

a tele-graphic display device, comprising:

an image assembly having a first surface;

the mirror group comprises a first mirror and a second mirror, wherein the first mirror is provided with a first reflecting surface, at least part of the first reflecting surface is opposite to the first surface, the second mirror is provided with a second reflecting surface, at least part of the second reflecting surface is opposite to the first reflecting surface, the first surface emits a first light beam, the first light beam sequentially passes through the first reflecting surface and the second reflecting surface to form a second light beam, the mirror group is further provided with a preset position, and the second light beam penetrates through the preset position.

In addition, the far-image display device according to the present application may further have the following additional technical features:

in some embodiments of the present application, in the first direction, the preset position is spaced from the first surface by 285-345mm.

In some embodiments of the present application, an enlarged virtual image of the first surface is formed on a reverse extension of the second light beam, and a distance between the enlarged virtual image and the preset position in a second direction is not less than 3m, wherein the second direction is perpendicular to the first direction.

In some embodiments of the present application, the preset position is a plane, a normal direction of the preset position is parallel to the second direction, and the preset position is opposite to the center of the amplified virtual image.

In some embodiments of the present application, the preset position is located on a side of the first surface away from the second lens, and in the first direction, a distance between the preset position and the first lens is 30-100mm;

in the second direction, the distance between the preset position and the first lens is 30-100mm.

In some embodiments of the present application, the preset position size is 0.004m ² ～0.013m ² 。

In some embodiments of the present application, the first surface has an area of no more than 0.09m ² 。

The application also provides a study desk, which comprises a desk body and the far image display device, wherein the image component and the reflecting mirror group are respectively arranged on the desktop of the desk body.

There is also provided in the present application a far image display apparatus including:

a tele-graphic display device as described above;

and the folding device is connected with the far-image display device and comprises a first folding component and/or a second folding component.

In addition, the far-image display device according to the present application may further have the following additional technical features:

in some embodiments of the present application, the tele-image display device further comprises an illumination member that illuminates the first surface.

Compared with the prior art, the beneficial effects of this application are: the far-image display device is provided with the image component and the reflecting mirror group, and no display equipment is arranged, so that miniaturization and light weight of products are realized, and the functions of reading and writing of books and flat plates are also considered; in addition, through setting up first lens with the second lens, first light beam is sent from first surface, forms the second light beam after first reflecting surface and second reflecting surface, and the second light beam wears to establish the preset position. The reflecting surface has the advantages of high imaging quality and high brightness, and when a user watches from a preset position, the user can see bright and clear pictures, so that the watching experience of the user is improved.

In addition, through setting up above-mentioned far image display device on the table body, put image component on the table body specifically, the student watches the picture of far focus in the position of predetermineeing to avoid long-time short distance eye, avoid myopia.

In addition, through setting up above-mentioned far image display device and folding subassembly and being connected, further reduce far image display device's volume, realize miniaturization.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 shows a schematic structural diagram of a far-image display device according to a first embodiment of the present application;

FIG. 2 shows an imaging schematic diagram of a tele-image display device according to a first embodiment of the present application;

fig. 3 is a schematic structural diagram of a far-image display device according to a second embodiment of the present application;

fig. 4 shows a schematic structural view of a learning table according to a third embodiment of the present application;

fig. 5 shows one of schematic structural diagrams of a far-image display device according to a fourth embodiment of the present application;

FIG. 6 shows a second schematic diagram of a far-image display device according to a fourth embodiment of the present application;

fig. 7 shows a schematic structural diagram of a far-image display device according to a fifth embodiment of the present application.

Description of main reference numerals: 100-far image display device; 110-an image component; 111-a first surface; 120-mirror group; 121-a first lens; 1211-a first reflective surface; 122-a second lens; 1221-a second reflective surface; 123-transmissive mirror group; 201-a preset position; 202-magnifying the virtual image; 1000-learning table; 200-a table body; 210-desktop; 2000-far image display device; 300-folding device; 310-a first folding component; 320-a second folding component; 321-a support; 322-lifting member; 400-lighting element; d1—a first direction; d2—second direction.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Example 1

As shown in fig. 1 and 2, embodiments of the present application provide a far image display apparatus 100 for implementing reading and writing and far image display of a book or a tablet device. The tele-display device 100 includes an image assembly 110 and a mirror set 120.

Wherein the image assembly 110 has a first surface 111. Specifically, the image component 110 is a book or a readable and writable device such as a mobile phone, a tablet, etc., and the first surface 111 is a page of the book or a surface on which a display screen of any one of the foregoing readable and writable devices is located. The user may perform a read/write operation on the first surface 111.

Further, the area of the first surface 111 is not more than 0.09m ² . By way of example, in some embodiments, the area of the first surface 111 is 300mm by 300mm. Under the area, books with the length vertically approaching to A4 can be watched, and a horizontal learning flat plate can be watched. In other embodiments, the area may also be 300mm by 192mm, 200mm by 192mm, 175mm by 146mm, 200mm by 200mm, 115mm by 225mm, etc., without limitation.

The mirror group 120 includes a first mirror 121 and a second mirror 122, the first mirror 121 having a first reflecting surface 1211, and the second mirror 122 having a second reflecting surface 1221. The first lens 121 is disposed opposite to the first surface 111 with a space therebetween such that the first reflecting surface 1211 is at least partially opposite to the first surface 111, and the second lens 122 is disposed opposite to the first lens 121 with a space therebetween such that the second reflecting surface 1221 is at least partially opposite to the first reflecting surface 1211. Thus, the first light beam emitted from the first surface 111 can be transmitted through the mirror group 120, and the image of the first surface 111 can be displayed in a far image.

Specifically, the first light beam emitted from the first surface 111 sequentially reflects through the first lens 121 and the second lens 122 to form a second light beam, and the mirror group 120 further has a preset position 201, where the second light beam passes through the preset position 201. The reflecting surface has the advantages of high imaging quality and high brightness, and when a user watches from the preset position 201, the user can see bright and clear pictures, so that the watching experience of the user is improved.

In the present embodiment, the first direction D1 is a direction perpendicular to the first surface 111, the second direction D2 is perpendicular to the first direction D1, and the second direction D2 is parallel to the center line direction of the magnified virtual image 202 and parallel to the normal direction of the preset position 201.

In the present embodiment, the second light beam entering the preset position 201 is from the second lens 122, so that the preset position 201 is disposed at a distance from the second lens 122. The second lens 122 is disposed obliquely with respect to the first lens 121, and a side of the second lens 122 near the first surface 111 is away from the first lens 121. The second lens 122 is disposed on the light path of the light beam emitted from the first lens 121, the first lens 121 is disposed obliquely with respect to the first surface 111, and a side of the first lens 121 near the preset position 201 is near the first surface 111. Through the arrangement, the volume occupied by the reflector group 120 can be reduced while the light path is ensured, and the structure design of miniaturization and light weight is realized without occupying too much space.

The first mirror 121 is any one of a free-form surface mirror, a plane mirror, a diffraction mirror, and a fresnel mirror, and the second mirror 122 is any one of a free-form surface mirror, a diffraction mirror, and a fresnel mirror. In the present embodiment, the first lens 121 is a free-form surface mirror, and the second lens 122 is a free-form surface mirror.

The free-form surface is an asymmetric, irregular and unsuitable surface described by a unified equation, has excellent local operability, can finish the calculation design of the surface shape according to the incident and emergent requirements without being based on the traditional object-image relation, and therefore, the arbitrary output of the optical field can be realized after the optical field is input by two or more free-form surfaces.

The mirror group 120 composed of the first lens 121 and the second lens 122 has the characteristics of light weight, no chromatic aberration, small distortion, excellent image quality, high light energy utilization rate, and the like, and in the present embodiment, the distortion under the full view field is less than 2%.

In addition, the viewing angle of the mirror group 120 using the total reflection structure is large, and in this embodiment, the transverse viewing angle can reach 25.2 degrees at maximum, and the longitudinal viewing angle can reach 25.2 degrees at maximum.

An enlarged virtual image 202 of the first surface 111 is formed on the opposite extension of the second light beam, and a distance L2 between the enlarged virtual image 202 and the preset position 201 in the second direction D2 is not less than 3m, and of course, the distance L2 may be understood as a distance L2 between the preset position 201 and the center of the enlarged virtual image 202 is not less than 3m. Thus, the user can see the magnified virtual image 202 with an imaging distance of not less than 3m at the preset position 201, and myopia caused by long-time short-distance eyes of the user is avoided.

It should be noted that, the preset position 201 is also referred to as an eye box, and the eye box may be a complete area, or may be two areas corresponding to two divided eyeballs. The region is any one of rectangular, circular and elliptical. In this embodiment, the preset position 201 is a rectangular area in the air. The human eye can see the complete virtual image in the region, and beyond the preset position 201 by a certain distance, the user can see the incomplete image or see the low-brightness, low-definition and deformed picture, and beyond the preset position 201, the situation that the image cannot be seen can occur.

In the present embodiment, the preset position 201 is a plane, the normal direction thereof is parallel to the second direction D2, and the size of the preset position 201 is 0.004m ² ～0.013m ² . In this embodiment, the preset position 201 is rectangular, and its size is 80mm×50mm to 130mm×100mm.

The preset position 201 is opposite to the center of the magnified virtual image 202, and further, the preset position 201 is opposite to the second lens 122 and is located on the center line of the magnified virtual image 202. In this way, the enlarged virtual image 202 is perpendicular to the line of sight direction of the user, and the user can level the enlarged virtual image 202, so that the viewing angle of the user viewing the enlarged virtual image 202 at the preset position 201 is a horizontal viewing angle, and the user experience is improved.

The inventor finds that the pupil easily generates bad sitting postures such as head tilting, bending, bowing back and the like in the learning process, and the bad sitting postures are kept for a long time to easily cause the physical problems of the pupil, and the pupil can be injured on the neck, the back and the waist.

For the above-mentioned problem, in the first direction D1, the distance L1 between the preset position 201 and the first surface 111 is 285-345mm. Thus, the student needs to sit on the upper body to see a clear and bright picture at the preset position 201. In other words, when eyes deviate from the preset position 201, the student can find that the watching picture is darkened, unclear or deformed, and the student is prompted to have an incorrect sitting posture, so that the sitting posture needs to be adjusted in time, and injuries to the neck, the back and the waist are effectively avoided.

In addition, the preset position 201 is opposite to the center of the amplified virtual image 202, so that the amplified virtual image 202 can be seen in the preset position 201 in a flat manner, the brightness, the definition and the regularity of a picture which is watched by a user at the preset position 201 are optimal, and the picture is free from the problems of darkening, blurring and deformation. In other words, when the sitting posture of the student is not correct, the eyes deviate from the preset position 201, the student may not be able to enlarge the virtual image 202 in a flat view, eye fatigue is easily generated, the sitting posture of the student is not correct, and the sitting posture of the student needs to be adjusted in time.

The preset position 201 is located on a side of the first surface 111 away from the second lens 122, so that the user can be prevented from leaning forward to collide with the first lens 121 when watching at the preset position 201.

In order to prevent the user from colliding with the lens due to bad sitting posture, the device is also provided with:

in the first direction D1, the distance between the preset position 201 and the edge of the first lens 121 is between 30mm and 100mm. In the present embodiment, the pitch L3 is 50mm.

In the second direction D2, the distance between the preset position 201 and the edge of the first lens 121 is between 30mm and 100mm. In the present embodiment, the pitch L4 is 50mm.

Based on the above-mentioned setting, can avoid the user to lead to the fact the forehead to collide with from first lens 121 too closely, can also reduce user's space oppression sense, increase and watch the comfort level.

Example two

As shown in fig. 3, the far-image display device 100 of the present embodiment further has a transmission mirror group 123, compared with the far-image display device 100 of the first embodiment. The transmissive mirror set 123 is disposed between the first surface 111 and the first lens 121.

The transmissive mirror set 123 includes at least one lens.

When the transmissive mirror group 123 includes one lens, the lens is any one of a lens, a fresnel transmissive lens, and a diffraction mirror.

When the transmission mirror group 123 includes a plurality of lenses, the transmission mirror group 123 is formed of at least one combination of lenses, fresnel transmission lenses, and diffraction mirrors.

The transmissive mirror set 123 is parallel to the first surface 111. The first light beam is emitted from the first surface 111, passes through the transmission lens group 123 and is directed to the first lens 121, and the first lens 121 reflects the light beam to the second lens 122 to form an enlarged virtual image 202 with an imaging distance of more than 3m from the human eye. By adding the transmission mirror group 123, the screen of the magnified virtual image 202 can be made clearer.

The other structures are the same as those of the first embodiment, and will not be described here again.

Example III

As shown in fig. 4, there is further provided a learning table 1000, which includes a table body 200 and the far image display device 100 according to any of the foregoing embodiments, and the image assembly 110 and the mirror assembly 120 are respectively disposed on the tabletop 210 of the table body 200.

Thus, the user can conveniently perform the reading and writing operation on the first surface 111 on the desktop 210.

The positions of the first lens element 121 and the second lens element 122 are fixed, and the size and imaging distance of the magnified virtual image 202 are also fixed, so that the human eye moves at the predetermined position 201, and the virtual image is not very close to the human eye, thereby avoiding myopia damage caused by close-range observation.

Further, in the first direction D1, the distance L5 between the preset position 201 and the table top 210 is 295-355mm, and such distance conforms to the pupil's eye distance for marking, so as to prevent myopia.

Under the condition that the student is askew to the head or bow back, because the deviation preset position 201, just sees darkened, warp, unclear enlarged virtual image 202 or can't see enlarged virtual image 202 to impel the student to keep correct position of sitting, effectively avoid the injury to neck, back, waist.

Example IV

As shown in fig. 5 and 6, the present application further provides a far-image display apparatus 2000, including a folding device 300 and the far-image display device 100 according to any of the foregoing embodiments.

The folding device 300 is connected to the far image display device 100, and is configured to fold the first lens 121 and the second lens 122 and drive the first lens 121 and the second lens 122 to move along the first direction D1.

Specifically, the folding device 300 includes a first folding assembly 310 and/or a second folding assembly 320.

The first folding component 310 is connected between the first lens 121 and the second lens 122, and is used for folding the first lens 121 and the second lens 122. When the folding assembly expands the first lens 121 and the second lens 122, the positional relationship between the first lens 121, the second lens 122 and the predetermined position 201 is the same as that in the first embodiment or the second embodiment, and will not be described in detail herein.

The second folding assembly 320 includes a supporting member 321 and a lifting member 322, the lifting member 322 is connected to the second lens 122, and the supporting member 321 is connected to the lifting member 322. The lifting member 322 is used for driving the first lens 121 and the second lens 122 to move along the first direction D1, and the supporting member 321 supports the lifting assembly.

Lifting piece 322 adopts flexible loop bar to realize the lift effect, further, lifting piece 322 is articulated with support piece 321, thereby realizes that lifting piece 322 and support piece 321 are folding, further reduces far image display device 2000's volume, and the shipment transportation of being convenient for is accomodate.

It should be noted that, the image assembly 110 is disposed on the supporting member 321, and the lifting member 322 drives the first lens 121 and the second lens 122 to move in the first direction D1, and when the first lens reaches the highest point, the preset position 201 is spaced from the first surface 111-345mm.

Example five

As shown in fig. 7, the far-image display apparatus 2000 of the present embodiment further includes an illumination 400, as compared with the far-image display apparatus 2000 of the fourth embodiment. The illumination member 400 is used for illuminating the first surface 111 for use when the brightness of the indoor ring mirror is dark. When the far-image display apparatus 100 is not used after the folding apparatus 300 is folded as in the fourth embodiment, the illumination member 400 may be used alone for reading.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A tele-graphic display device, comprising:

an image assembly having a first surface;

the mirror group comprises a first mirror and a second mirror, wherein the first mirror is provided with a first reflecting surface, at least part of the first reflecting surface is opposite to the first surface, the second mirror is provided with a second reflecting surface, at least part of the second reflecting surface is opposite to the first reflecting surface, the first surface emits a first light beam, the first light beam sequentially passes through the first reflecting surface and the second reflecting surface to form a second light beam, the mirror group is further provided with a preset position, and the second light beam penetrates through the preset position.

2. The tele-graphic display device of claim 1, wherein the predetermined location is spaced from the first surface by 285-345mm in a first direction.

3. A far-image display apparatus according to claim 2, wherein an enlarged virtual image of the first surface is formed on a reverse extension of the second light beam, and a distance between the enlarged virtual image and the preset position is not less than 3m in a second direction perpendicular to the first direction.

4. A far-image display apparatus according to claim 3, wherein the preset position is a plane whose normal direction is parallel to the second direction, the preset position being opposite to the magnified virtual image center.

5. The tele-graphic display device of claim 4, wherein the predetermined location is located on a side of the first surface remote from the second lens, the predetermined location being spaced from the first lens by 30-100mm in the first direction;

in the second direction, the distance between the preset position and the first lens is 30-100mm.

6. The tele-image display device according to any one of claims 1 to 5, wherein the preset position size is 0.004m ² ～0.013m ² 。

7. The telechelic display apparatus of any of claims 1-5, wherein the area of the first surface is no more than 0.09m ² 。

8. A learning desk comprising a desk body and a tele-vision display device according to any one of claims 1 to 7, wherein the image assembly and the mirror assembly are respectively disposed on the top of the desk body.

9. A tele-graphic display device comprising a tele-graphic display apparatus according to any one of claims 1 to 7;

and the folding device is connected with the far-image display device and comprises a first folding component and/or a second folding component.

10. The tele-image display device of claim 9, further comprising an illumination element that illuminates the first surface.