CN114647025A

CN114647025A - Aerial imaging device, reflector plate and preparation method thereof

Info

Publication number: CN114647025A
Application number: CN202011516085.0A
Authority: CN
Inventors: 李小龙; 秦纬; 彭宽军; 郭凯; 王铁石; 张春芳; 刘伟星; 徐智强; 滕万鹏
Original assignee: BOE Technology Group Co Ltd
Current assignee: BOE Technology Group Co Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2022-06-21

Abstract

The embodiment of the application discloses aerial imaging equipment, a reflecting plate and a preparation method of the reflecting plate. One specific embodiment of the preparation method comprises the following steps: forming a first phase delay piece, a ferromagnetic foil piece and a second phase delay piece which are sequentially stacked on a substrate; cutting the first phase retarder, the ferromagnetic foil and the second phase retarder to form a plurality of reflective strip structures arranged in parallel along a first direction; a magnetic field is generated with a magnetic field direction perpendicular to the substrate such that the reflective strip structure is erected to form a reflective strip. The implementation method has simple process and easy realization, overcomes the difficulty of attaching the phase delay plates on the two sides of the reflecting strips, and can ensure that the reflecting strips are distributed on the substrate at equal intervals due to the repulsive force among the reflecting strips so as to improve the imaging effect of the aerial imaging equipment.

Description

Aerial imaging device, reflector plate and preparation method thereof

Technical Field

The application relates to the technical field of aerial display. And more particularly, to an aerial imaging device, a reflection plate, and a method of manufacturing the same.

Background

The aerial imaging technology is that a two-dimensional or three-dimensional image is directly displayed in the air without a medium, and a person or an object can directly pass through the image, so that good interaction and immersion display effects are achieved.

Most of the mature aerial display products in the current market are applied to projection technology, for example, the products include: aerosol projection display, holographic projection display and laser projection display. However, the existing aerial imaging technology generally has the following disadvantages: the display equipment is too large, the structure of the display equipment is complex, the displayed graph is simple, the display effect is poor, the display of a three-dimensional picture is difficult to effectively realize, the preparation process is complex, and the preparation cost is high.

Disclosure of Invention

An object of the present application is to provide an aerial imaging device, a reflection plate and a method of manufacturing the same to solve at least one of the problems of the prior art.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the application provides a preparation method of a reflector plate in aerial imaging equipment, which comprises the following steps:

forming a first phase delay piece, a ferromagnetic foil piece and a second phase delay piece which are sequentially stacked on a substrate;

cutting the first phase retarder, the ferromagnetic foil and the second phase retarder to form a plurality of reflective strip structures arranged in parallel along a first direction;

a magnetic field is generated with a magnetic field direction perpendicular to the substrate such that the reflective strip structure stands upright to form a reflective strip.

The preparation method of the reflector in the aerial imaging device provided by the first aspect of the application is simple in process and easy to implement, overcomes the difficulty that phase delay plates are attached to two sides of the reflector, and enables the reflector to be distributed on the substrate at equal intervals due to the existence of repulsive force between the reflector, so that the imaging effect of the aerial imaging device is improved.

In one possible implementation, the cutting the first phase retarder, the ferromagnetic foil, and the second phase retarder into a plurality of reflective stripe structures arranged in parallel along a first direction includes: and cutting the first phase retarder, the ferromagnetic foil and the second phase retarder along a first direction and a second direction respectively to form a plurality of reflective strip structure groups which are arranged in parallel along the first direction, wherein each reflective strip structure group comprises a plurality of reflective strip structures which are sequentially arranged along the second direction respectively, and the second direction is perpendicular to the first direction.

This implementation, through cutting the reflection strip structure in the second direction, can reduce the length of each reflection strip structure of point to can't have the distortion in making single reflection strip, and, through reducing the length of single reflection strip, reduced its risk of lodging.

In a possible implementation manner, a ratio between a length of the reflective strip in the second direction and a length of the reflective strip in a third direction is greater than 1:1 and less than 10:1, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

In this implementation, the reflector structures have different lengths and widths, which facilitates their erection in a magnetic field.

In one possible implementation, n of the first phase retarder of the reflective strip_eDirection and n of the second phase delay piece_eThe directions are respectively parallel to a second direction, the second direction is perpendicular to the first direction, and a plane formed by the second direction and the first direction is parallel to the substrate.

In this implementation, n of the phase retarder can be adjusted by_eDirection is correspondingly providedThus, the variation of the phase retardation amount caused by the variation of the angle of view can be reduced.

The second aspect of the present application provides a method for manufacturing a reflector in an aerial imaging device, where the method includes: dividing a substrate into a plurality of reflecting strip structure areas which are arranged in parallel along a first direction, forming a first color filter layer at a position corresponding to an n-1 th reflecting strip structure area, forming a second color filter layer at a position corresponding to an n-th reflecting strip structure area, and forming a third color filter layer at a position corresponding to an n +1 th reflecting strip structure area on the substrate, wherein n is m +2, m is 3 (i-1), and i is a positive integer;

forming a third phase retarder on the first color filter layer, a fourth phase retarder on the second color filter layer, and a fifth phase retarder on the third color filter layer;

forming a first ferromagnetic foil, a second ferromagnetic foil and a third ferromagnetic foil on the third phase delay plate, the fourth phase delay plate and the fifth phase delay plate respectively;

forming a sixth phase retarder on the first ferromagnetic foil, a seventh phase retarder on the second ferromagnetic foil, and an eighth phase retarder on the third ferromagnetic foil;

forming a third color filter layer on the sixth phase retarder, forming a first color filter layer on the seventh phase retarder, and forming a second color filter layer on the eighth phase retarder to form a plurality of reflective strip structures arranged in parallel along a first direction, wherein the plurality of reflective strip structures are respectively located in a plurality of reflective strip structure areas;

generating a magnetic field with a magnetic field direction perpendicular to the substrate such that the reflective strip structure is erected to form a reflective strip;

wherein a thickness of the third phase retarder and a thickness of the seventh phase retarder correspond to a wavelength of the first color light, a thickness of the fourth phase retarder and a thickness of the eighth phase retarder correspond to a wavelength of the second color light, and a thickness of the fifth phase retarder and a thickness of the sixth phase retarder correspond to a wavelength of the third color light.

The preparation method of the reflector plate in the aerial imaging device provided by the second aspect of the application has the advantages that the process is simple, the implementation is easy, the difficulty that phase delay plates and filter layers are attached to two sides of the reflector strips is overcome, and the reflector strips can be distributed on the substrate at equal intervals due to the repulsive force among the reflector strips, so that the imaging effect of the aerial imaging device is improved. In addition, the reflector plate prepared by the preparation method of the reflector plate in the aerial imaging equipment provided by the second aspect of the application is provided with the filter layer on the surface of the phase retarder, so that the problems of light leakage and interference can be prevented.

In a possible implementation manner, before the generating the magnetic field with the magnetic field direction perpendicular to the substrate, the method for preparing the reflector plate in the aerial imaging device further includes: and cutting the plurality of reflection bar structures along a second direction to cut each reflection bar structure into a plurality of reflection bar structures which are sequentially arranged along the second direction, wherein the second direction is perpendicular to the first direction.

In this implementation, the reflector structures have different lengths and widths, which facilitates erection in a magnetic field.

The third aspect of the application provides a reflector plate of an aerial imaging device, which comprises a substrate and a plurality of reflector strips formed on the substrate and arranged in parallel along a first direction;

a sixth phase delay piece is arranged on the first reflecting surface of the (n-1) th reflecting strip, a third phase delay piece is arranged on the second reflecting surface, a third color filter layer is arranged on the sixth phase delay piece, and a first color filter layer is arranged on the third phase delay piece;

a seventh phase retarder is arranged on the first reflecting surface of the nth reflecting strip, a fourth phase retarder is arranged on the second reflecting surface, the seventh phase retarder is provided with a first color filter layer, and the fourth phase retarder is provided with a second color filter layer;

an eighth phase retarder is arranged on the first reflecting surface of the (n + 1) th reflecting strip, a fifth phase retarder is arranged on the second reflecting surface, a second color filter layer is arranged on the eighth phase retarder, and a third color filter layer is arranged on the fifth phase retarder;

wherein a thickness of the third phase retarder and a thickness of the seventh phase retarder correspond to a wavelength of the first color light, a thickness of the fourth phase retarder and a thickness of the eighth phase retarder correspond to a wavelength of the second color light, and a thickness of the fifth phase retarder and a thickness of the sixth phase retarder correspond to a wavelength of the third color light; n is m +2, m is 3 (i-1), and i is a positive integer.

In one possible implementation, n of each phase retarder_eThe directions are respectively parallel to a second direction, the second direction is perpendicular to the first direction, and a plane formed by the second direction and the first direction is parallel to the substrate.

The fourth aspect of the present application provides an aerial imaging device, including a display panel, a reflective plate prepared by the method for preparing a reflective plate in an aerial imaging device provided by the first aspect of the present application, a first polarizer, and a second polarizer;

the reflecting plate is used for converging light emitted by the display panel arranged on one side of the reflecting plate to the other side of the reflecting plate to form a corresponding image;

the first polarizer is arranged between the display panel and the reflecting plate, the second polarizer is arranged on one side of the reflecting plate, which is far away from the display panel, and the transmission axis directions of the first polarizer and the second polarizer are different.

A fifth aspect of the present application provides an aerial imaging device comprising a display panel, a reflective plate of the aerial imaging device as provided in the third aspect of the present application, a first polarizer, and a second polarizer;

the reflecting plate is used for converging light emitted by the light-emitting entity arranged on one side of the reflecting plate to the other side of the reflecting plate to form a corresponding image;

the first polarizer is arranged between the display panel and the reflecting plate, the second polarizer is arranged on one side of the reflecting plate, which is far away from the display panel, and the transmission axis directions of the first polarizer and the second polarizer are different;

the display panel comprises a first color photon pixel, a second color photon pixel and a third color photon pixel, wherein the projection of a spacing region between an n-1 th reflection bar and an n +1 th reflection bar on the display panel corresponds to the first color photon pixel, the projection of a spacing region between the n +1 th reflection bar and an n +1 th reflection bar on the display panel corresponds to the second color photon pixel, and the projection of a spacing region between the n +1 th reflection bar and an n +2 th reflection bar on the display panel corresponds to the third color photon pixel.

A sixth aspect of the present application provides an aerial imaging device comprising:

a display panel;

a first polarizing device and a second polarizing device provided to the cartridge;

a semi-transparent and semi-reflective structure and a semi-transparent and semi-reflective membrane are arranged between the first polarizer and the second polarizer;

a first 1/4 wave plate is arranged on one side of the aerial imaging device close to the first polarizer, and a second 1/4 wave plate is arranged between the semi-transparent and semi-reflective structure and the semi-transparent and semi-reflective membrane;

a micro-lens array used for converting light emitted by pixels of the display panel into parallel light is arranged between the first polarization device and the display panel, and the display panel is positioned on a focal plane of the micro-lens array;

the aerial imaging device is used for processing parallel polarized light rays which are emitted by pixels of the display panel and sequentially pass through the micro lens array and the first polarizing device through a light path in the aerial imaging device, so that the polarized light rays which pass through the second polarizing device form aerial images in a space far away from the display panel.

The utility model provides an aerial imaging equipment that sixth aspect provided, including display panel, first polarizing device and the second polarizing device to the box setting, the microlens array of setting between display panel and first polarizing device, be provided with half transflective structure and half transflective film piece between this first polarizing device and the second polarizing device, it is provided with first 1/4 wavelength piece to be close first polarizing device one side in this aerial display device, be provided with second 1/4 wavelength piece between half transflective structure and the half transflective film piece, the polarized light that sends by the light source and pass first polarizing device is handled through the inside light path of this aerial display device, the polarized light that passes second polarizing device forms aerial image in the one side that aerial display device kept away from the light source. The aerial imaging device has a good imaging effect, is simple in structure, easy to realize, small in size and capable of being of a flat plate structure.

The beneficial effect of this application is as follows:

the aerial imaging device provided by the application has the advantages of simple structure, easiness in implementation, small size, good imaging effect and simple preparation process.

Drawings

The following describes embodiments of the present application in further detail with reference to the accompanying drawings.

Fig. 1 shows a block diagram of an apparatus for aerial imaging with a reflector plate.

Fig. 2 shows an imaging principle of the apparatus for aerial imaging by means of a reflector plate.

Fig. 3 is a schematic diagram showing that the device for realizing aerial imaging through the reflector plate has invalid light interference during imaging.

Fig. 4 shows a schematic diagram of the principle of filtering out the ineffective light rays by the device for realizing aerial imaging through the reflector plate.

Fig. 5 shows a block diagram of an apparatus for aerial imaging with two sets of reflective plates.

Fig. 6a shows an imaging principle diagram (front view) of an apparatus for aerial imaging by two sets of reflective plates.

Fig. 6b shows an imaging principle (top view) of the device for aerial imaging by means of two sets of reflective plates.

Fig. 7 shows a flowchart of a method for manufacturing a reflector plate in an aerial imaging device according to an embodiment of the present application.

Fig. 8 to 11 are intermediate structural views showing an appearance of a reflection plate in a process of manufacturing the reflection plate by a method of manufacturing a reflection plate in an aerial imaging device provided by an embodiment of the present application.

Fig. 12 shows a schematic view of the presence of twisting and lodging of the reflective strip.

Fig. 13 is a schematic diagram illustrating a method for improving the preparation of a reflector plate in an aerial imaging device according to an embodiment of the present application to solve the problem of the occurrence of twisting and falling of a reflector strip.

Fig. 14 is a schematic diagram showing a device for realizing aerial imaging through a reflector plate, wherein a smear exists in imaging.

FIG. 15a shows a retarder of different n_eThe reflection of light rays in the downward direction is schematically shown.

FIG. 15b shows phase retarders with different n_eThe change of the downward viewing angle and the phase delay amount is shown.

Fig. 16 shows a schematic structural diagram of an aerial imaging device provided in an embodiment of the present application.

Fig. 17 shows a schematic structural diagram of an aerial imaging device provided in an embodiment of the present application.

Fig. 18 shows a flowchart of a method for manufacturing a reflector plate in an aerial imaging device according to an embodiment of the present application.

Fig. 19 shows a schematic structural diagram of an aerial imaging device provided by an embodiment of the present application.

Fig. 20 is a schematic diagram illustrating a structure of a semi-transparent semi-reverse diaphragm provided by an embodiment of the present application.

Fig. 21 shows a semi-transparent semi-reflective film physical diagram provided by an embodiment of the present application.

Fig. 22 shows a schematic structural diagram of an aerial imaging device provided by an embodiment of the present application.

Fig. 23 illustrates an optical path schematic diagram of an aerial imaging device provided by an embodiment of the present application.

Detailed Description

In order to more clearly explain the present application, the present application is further described below with reference to the embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the present application.

In the prior art, aerial imaging is usually realized by the following methods, namely 1) a picture is projected on a gas mist through gas mist projection display, but the problem of unstable image quality exists in the projection method. 2) The method is characterized in that light emitted by a light source is divided into two beams through holographic projection display, one beam is directly emitted to a photosensitive film, the other beam is emitted to the photosensitive film after being reflected by a shot object, the two beams are superposed on the photosensitive film to generate interference, and a holographic image is obtained. 3) Laser projection display is to ionize air in a closed container, and three-dimensional pictures can be presented by using laser, but the pictures are easy to fluctuate and unstable and have single color.

Based on this. The inventor proposes an aerial imaging device as shown in fig. 1, which comprises a first reflection plate 10, wherein the first reflection plate 10 comprises a plurality of reflection strips 11 arranged in parallel along an X-axis direction and a substrate 12 carrying the plurality of reflection strips, the plurality of reflection strips 11 are used for converging light emitted by a light-emitting entity 20 arranged on one side of the imaging device to the other side of the imaging device to form a corresponding image 30, wherein a connecting line between the light-emitting entity 20 and the corresponding image 30 is positioned in a direction parallel to a Z-axis, and the Z-axis direction is perpendicular to the X-axis.

It should be noted that the light-emitting entity 20 is actually a display panel or a light-emitting object.

Referring to fig. 2, the imaging principle of the aerial imaging device is that when a plurality of reflective strips 11 are arranged in parallel along the X-axis direction, the emergent light of the light-emitting entity 20 is recombined in the direction parallel to the Z-axis, and when viewed, the aerial imaging is realized as if the light-emitting object floats in the air. Aerial imaging can be realized by the aid of the reflecting strips 11 which are arranged in parallel, and the imaging equipment is small in size and low in preparation cost.

It should be noted that, when the aerial imaging device is used for imaging, when the light emitted by the light-emitting entity 20 is reflected by the first reflection plate 10, the light is affected by the positions of the reflection strips 11 in the first reflection plate 10, and some light cannot be converged to form an image, for example, as shown in fig. 3, the light n₁、n₂And n₅When passing through the first reflection plate 10, it can be focused to form an image, however, the light n₃、n₄And n₆The image cannot be converged, and the problem of background light or interference light is caused, so that the problems of imaging blurring, blurring and the like are caused. For convenience of description and understanding, we define that light rays capable of converging an image are effective light rays, and otherwise, are ineffective light rays.

The inventors have studied the light emitted by the light-emitting entity 20 and found that the following relationship exists between the light and the reflective strips 11:

when the number of times of reflection of the light on the reflective strip 11 is odd, the light will become effective light, such as light n₁、n₂And n₅(ii) a Otherwise, it is an invalid ray, e.g. ray n₃、n₄And n₆。

Based on this finding, the inventor modified the aerial imaging device to filter the ineffective light, referring to fig. 4, first, a first polarization plate 61 is disposed on the side of the first reflection plate facing the light emitting entity 20, and a second polarization plate 62 is disposed on the side away from the light emitting entity, and the absorption and transmission relationships of the first polarization plate 61 and the second polarization plate 62 to the transverse and longitudinal light are opposite, that is, when the first polarization plate 61 is disposed to absorb the transverse wave light and transmit the longitudinal wave light, the second polarization plate 62 absorbs the longitudinal wave light and transmits the transverse wave light; when the first polarizer 61 is arranged to absorb the longitudinal wave light and transmit the transverse wave light, the second polarizer 62 absorbs the transverse wave light and transmits the longitudinal wave light; then, phase retarders 70 are disposed on both sides of each reflective strip.

It is easily understood that the retardation plate 70 can change the wave directionality of light, for example, when the light incident on the surface of the retardation plate 70 is a transverse wave, the light is changed into a longitudinal wave when the retardation plate 70 exits; when the light incident on the surface of the retarder 70 is a longitudinal wave, the light is emitted out of the retarder as a transverse wave.

With continuing reference to fig. 4, taking the example where the first polarizer 61 absorbs transverse waves and transmits longitudinal waves, and the second polarizer 62 absorbs longitudinal waves and transmits transverse waves, the filtering method is explained as follows:

when the light emitted by the light-emitting entity 20 passes through the first polarizer 61, the first polarizer 61 absorbs the transverse wave and transmits the longitudinal wave, and the light incident to the first reflector 10 is the longitudinal wave and continues to be the light n₁～n₆For example, n₁And n₂All reflected by the primary reflection strip 11, and when passing through the phase retardation plate 70 disposed on the reflection strip 11, the longitudinal wave is changed into the transverse wave, and finally passes through the second polarizer 62, and the second polarizer 62 absorbs the longitudinal wave and transmits the transverse wave, and will not be directed to n₁And n₂Influence n₁And n₂Imaging after passing through the second polarizer 62; ray n₃And n₄Is not reflected by the reflective strips 11 and is incident directly on the second polarizer 62, since n₃And n₄If both are longitudinal waves, they are absorbed by the second polarizer 62 and cannot pass through the second polarizer 62; ray n₅3 reflections are carried out on the reflecting strips 11 of the reflecting plate 10, and the light rays are subjected to a series of changes of longitudinal wave → transverse wave → longitudinal wave → transverse wave, are finally incident to the second polarizing plate 62 and are imaged through the second polarizing plate 62; ray n₆The reflection stripes 11 of the reflection plate 10 are reflected 4 times, and the light rays undergo a series of changes of longitudinal wave → transverse wave → longitudinal wave, and finally enter the second polarizer 62 and are absorbed by the second polarizer 62.

It is easy to understand that, when the first polarizer 61 absorbs the longitudinal wave and transmits the transverse wave, and the second polarizer 62 absorbs the transverse wave and transmits the longitudinal wave, the principle is similar to the above-mentioned case where the first polarizer 61 absorbs the transverse wave and transmits the longitudinal wave, and the second polarizer 62 absorbs the longitudinal wave and transmits the transverse wave, and the details are not repeated here.

Through the improvement of the aerial imaging equipment, the influence of invalid light on imaging can be fundamentally filtered, and the imaging quality is improved.

It should be noted that, because there is only a single reflective plate 10, the light-emitting entity 20 can only be projected onto a plane, for example, the plurality of reflective strips 11 arranged in parallel along the X axis can only converge and image light incident on a plane parallel to a plane formed by the X axis and the Z axis, and light incident in the Y axis direction cannot converge and emit the light, so that the converged image cannot present three-dimensional stereoscopic impression.

Therefore, as shown in fig. 5, the aerial imaging device further includes a second reflection plate 40, the second reflection plate 40 being stacked on the light exit side of the first reflection plate 10, including a plurality of reflection bars 42 arranged in parallel along the Y-axis parallel direction; the Y-axis direction is parallel to the X-axis direction and the Z-axis direction respectively.

For convenience of description and understanding, the reflective stripes 11 of the first reflective plate 10 are referred to as first reflective stripes 11; the reflection bars 41 of the second reflection plate 40 are referred to as second reflection bars 41.

Referring to fig. 6, in fig. 6a, a part of light emitted from the light-emitting entity 20 to the first reflective strips 11 is reflected and directly converged on the image, and another part of light (light d in the figure) is reflected by the first reflective strips 11 to the second reflective strips 41 and then converged on the image 30 after being reflected by the second reflective strips 41. Fig. 6b shows a top view of the direction of the light ray d. It can be seen that without the second reflective strips 41, the light ray d would be reflected directly out of the imaging device. Therefore, the second reflection plate 40 is arranged, so that more light rays can be converged and imaged, and the imaging is more three-dimensional and clear.

It should be noted that the first reflection plate 10 and the second reflection plate 40 are the same except that the arrangement direction of the reflection stripes is different, except that in the image forming apparatus, the second reflection plate 40 is arranged on the light emitting side of the first reflection plate 10, and the first reflection stripes 11 of the first reflection plate 10 are arranged perpendicular to the second reflection stripes 41 of the second reflection plate 40.

It is easy to understand that when the aerial imaging device includes the first reflection plate 10 and the second reflection plate 40, the principle and method for filtering the ineffective light rays by the second reflection plate 40 are the same as when the aerial imaging device includes only the first reflection plate 10, and will not be described in detail herein.

For the aerial imaging device, since the phase retardation plates 70 need to be arranged at both ends of the reflection strip, there is a problem that the manufacturing process is complicated when manufacturing.

The preparation process of the reflecting plate which is commonly used comprises the following steps:

firstly, forming a substrate, and forming a plurality of reflecting strips on the substrate by gluing and the like;

then, phase retarders are attached to both sides of the reflective strips.

In the above method, when the reflective plate is formed, the attachment work of the phase retarder needs to be repeated several times, which complicates the manufacturing process.

In order to optimize the preparation process of the reflector in the aerial imaging device, as shown in fig. 7, one embodiment of the present application provides a preparation method of a reflector in an aerial imaging device, the preparation method including:

s10, forming a first phase delay sheet, a ferromagnetic foil sheet and a second phase delay sheet which are sequentially stacked on the substrate;

specifically, first, the first phase retarder is laid on the substrate, then the ferromagnetic foil is attached to the upper surface of the first phase retarder, and then the second phase retarder is attached to the upper surface of the ferromagnetic foil, so as to finally form the structure shown in fig. 8.

It should be noted that, as shown in fig. 9, the first phase retarder and the second phase retarder may be attached to two sides of the ferromagnetic foil respectively and then laid on the substrate.

It is noted that the structure of the substrate with the first retarder, the ferromagnetic foil and the second retarder is not cured at this step.

S20, cutting the first phase retardation plate, the ferromagnetic foil and the second phase retardation plate to form a plurality of reflecting strip structures which are arranged in parallel along a first direction;

specifically, the structure formed by the first phase retarder, the ferromagnetic foil and the second phase retarder is cut uniformly by a knife wheel or a laser, etc., so as to form a plurality of reflective strip structures arranged in parallel along the first direction, such as the structure shown in fig. 10.

It should be noted that the first direction is the aforementioned X-axis direction.

S30, generating a magnetic field with the direction perpendicular to the substrate, so that the reflecting strip structure is erected to form reflecting strips;

specifically, referring to fig. 11, the reflective strip structure formed by cutting is a cuboid with different lengths and widths, because the magnetic field passes through the ferromagnetic foil as far as possible, so that the energy in the system is lower, and the longer the length of the magnetic induction lines in the ferromagnetic foil is, the lower the potential energy of the system is, therefore, when the strong magnetic field passes through the ferromagnetic foil with different lengths and widths, the longer the length of the ferromagnetic foil will be arranged along the magnetic induction lines.

That is, the slit reflector structures are vertically rotated by 90 ° clockwise (or 90 ° counterclockwise) in the plane of the substrate by the magnetic field, and the final reflector structure is formed.

It should be noted that, by applying a magnetic field, the reflective strip structure is erected, which may cause the reflective strip structure to be twisted (as shown in fig. 12) or to fall down (i.e., not be erected). This is because, under the action of the strong magnetic field, the reflective strip structure is not necessarily in the lowest potential energy state, and may also have other metastable states, which will affect the imaging image quality of the aerial imaging device.

To avoid the problem of reflector strip distortion, in some embodiments, step S20 further includes the following sub-steps:

the first phase retarder, the ferromagnetic foil and the second phase retarder are cut along the first direction and the second direction respectively to form a plurality of reflective strip structure groups arranged in parallel along the first direction, and each reflective strip structure group respectively comprises a plurality of reflective strip structures arranged in sequence along the second direction, namely the structure shown in fig. 13. Wherein the second direction is perpendicular to the first direction.

It should be noted that the second direction is the aforementioned Y-axis direction.

By reducing the length of each reflective strip structure, no twist can exist in a single reflective strip, and by reducing the length of the single reflective strip, the risk of falling is reduced.

In the foregoing, under the condition of applying a magnetic field, the reflective strip structure is erected to form the reflective strip, and the principle is based on the difference in length and width of the reflective strip structure, so that when the reflective strip structure is cut in the second direction Y, it is necessary to ensure that the cut reflective strip structure has different lengths and widths. Thus, in some embodiments, the ratio between the length of the reflective strips in the second direction and the length of the reflective strips in a third direction is greater than 1:1 and less than 10:1, wherein the third direction is perpendicular to the first and second directions, respectively.

It should be noted that the third direction is the aforementioned Z-axis direction.

It should be noted that, the ratio of the length of the reflective strip along the second direction to the length of the reflective strip along the third direction is greater than 1:1, so as to make the length and the width of the pixel strips different, and make the pixel strip structure erect; the purpose of making the ratio of the length of the reflective strip in the second direction to the length of the reflective strip in the third direction less than 10:1 is to greatly reduce the height (height in the Z-axis direction) of the pixel strip, because, as shown in fig. 14, due to the existence of the height c of the reflective strip, a certain smear S exists in the image of the aerial imaging device, and as can be seen from the geometrical relationship in fig. 14, the following relationship exists between the smear S and the height c of the reflective strip:

s is 2 × c, so a smaller c is better.

It should be noted that if c is too small, the problem of unclear imaging may occur, and the specific value of c may be obtained through multiple experiments or simulations, which will not be described herein again.

It is easily understood that the light-adjusting effect of the retardation plate depends on the retardation amount of the retardation plate, which is in turn caused by the double-folding of the retardation plateThe refractive index and the thickness. The phase retardation magnitude can be expressed as (n) at a positive viewing angle_e-n₀) D, wherein n_eIs the refractive index of the material in the direction of the optical axis, n₀Is the refractive index of the material in the direction perpendicular to the optical axis, (n)_e-n₀) I.e. the birefringence of the retarder, d is the thickness of the retarder. When the viewing angle is changed, the birefringence and the thickness are changed, and thus the phase retardation is also changed.

To reduce the variation of the amount of phase retardation with the change of viewing angle, in some embodiments, n of the first retarder of the reflective strip_eDirection and n of second phase delay piece_eThe directions are respectively parallel to the second direction.

In addition, n is_eThe direction is the optical axis direction of the phase retarder.

In a specific example, referring to FIG. 15, in FIG. 15a, n is represented by Case1_eThe direction being parallel to the first direction, n being denoted by Case2_eThe direction being parallel to the second direction, n being denoted by Case3_eThe direction is parallel to the third direction.

Through experimental simulation, a relationship diagram between the phase retardation amount and the viewing angle as shown in fig. 15b is obtained, and it can be obtained when n of the first phase retardation plate is_eDirection and n of second phase delay piece_eWhen the directions are respectively parallel to the second direction, the phase delay amount is minimum along with the change amplitude of the visual angle.

And S40, fixing the formed reflection strip on the substrate through photosensitive adhesive.

The preparation method of the reflector in the aerial imaging device provided by the embodiment has the advantages that the process is simple, the implementation is easy, the difficulty of attaching the phase delay plates on the two sides of the reflector is overcome, and the reflector strips can be distributed on the substrate at equal intervals due to the existence of repulsive force among the reflector strips, so that the imaging effect of the imaging device is improved.

It should be noted that, for the aerial imaging device mentioned above including the first reflection plate and the second reflection plate, both the first reflection plate and the second reflection plate can be manufactured by the manufacturing method, and when the second reflection plate is manufactured, the steps are the same except for the difference from the first reflection plate in the direction description.

As mentioned above, the influence of the ineffective light on the imaging effect can be effectively reduced by disposing the phase retarders on the two sides of the reflective strip, but it is not negligible that the light emitted by the light emitting entity is RGB three light, and when the RGB three light simultaneously pass through the phase retarders, the polarization deflection is different.

To solve the problem, as shown in fig. 16, another embodiment of the present application provides a reflector plate of an aerial imaging device, including a substrate and a plurality of reflector strips formed on the substrate and arranged in parallel along a first direction;

a seventh phase retarder is arranged on the first reflecting surface of the nth reflecting strip, a fourth phase retarder is arranged on the second reflecting surface, a first color filter layer is arranged on the seventh phase retarder, and a second color filter layer is arranged on the fourth phase retarder;

the first reflecting surface of the (n + 1) th reflecting strip is provided with an eighth phase retarder, the second reflecting surface is provided with a fifth phase retarder, the eighth phase retarder is provided with a second color filter layer, and the fifth phase retarder is provided with a third color filter layer;

the thickness of the third phase retarder and the thickness of the seventh phase retarder correspond to the wavelength of the first color light, the thickness of the fourth phase retarder and the thickness of the eighth phase retarder correspond to the wavelength of the second color light, and the thickness of the fifth phase retarder and the thickness of the sixth phase retarder correspond to the wavelength of the third color light; n is m +2, m is 3 (i-1), and i is a positive integer.

In one specific example, referring to fig. 17, for ease of understanding, only the reflective plate of the aerial imaging device including four sets of reflective strips is shown, wherein the first reflective strip corresponds to the (n-1) th reflective strip in a left-to-right order; the second reflecting strip corresponds to the nth reflecting strip; the third reflecting strip corresponds to n +1 reflecting strips; the fourth reflective strip corresponds to n +2 reflective strips.

The phase retarder arranged on the left side of the first reflection strip corresponds to the sixth phase retarder, and a third color filter layer (namely a B filter layer in the figure) is correspondingly arranged;

the phase retarder arranged on the right side of the first reflection strip corresponds to the third phase retarder and is correspondingly provided with a first color filter layer (namely an R filter layer in the figure);

the phase retarder arranged on the left side of the second reflection strip corresponds to the seventh phase retarder and is correspondingly provided with a first color filter layer (namely an R filter layer in the figure);

the phase retarder arranged on the right side of the second reflection bar corresponds to the fourth phase retarder and is correspondingly provided with a second color filter layer (namely a G filter layer in the figure);

the phase retarder arranged on the left side of the third reflecting strip corresponds to the eighth phase retarder and is correspondingly provided with a second color filter layer (namely a G filter layer in the figure);

the phase retarder arranged on the right side of the third reflection bar corresponds to the fifth phase retarder and is correspondingly provided with a third color filter layer (namely, a filter layer B in the figure);

the phase retarder arranged on the left side of the fourth reflecting strip corresponds to the sixth phase retarder and is correspondingly provided with a third color filter layer (namely a B filter layer in the figure);

the phase retarder arranged on the right side of the fourth reflection bar corresponds to the third phase retarder and is correspondingly provided with a first color filter layer (namely an R filter layer in the figure).

And the filter layers with the same color are arranged on the phase delay sheets arranged at the opposite positions of the two adjacent reflecting strips.

That is, in fig. 17, filter layers (R filter layers) of the same color are provided on both inner sides of the channels 1 formed between the first and second reflection bars. Filter layers (G filter layers) of the same color are provided on both inner sides of the passages 2 formed between the second and third reflection bars. Filter layers (B filter layers) of the same color are provided on both inner sides of the channels 3 formed between the third and fourth reflection bars.

When the RGB light passes through the channel 1, both the G light and the B light are absorbed by the R filter layer, and only the R light can be imaged after odd number of reflections in the channel 1.

The thickness of the retardation plate is based on the wavelength corresponding to the color of the filter layer disposed on the surface of the retardation plate, and the purpose of the retardation plate is to ensure the phase shift amount of light of a specific color after passing through the retardation plate.

In one specific example, the wavelength of red light (R light) is 600nm, the wavelength of green light (G light) is 550nm, and the wavelength of blue light (B light) is 480 nm.

In this example, the first color, the second color, and the third color may be respectively matched with three colors of RGB, but the first color, the second color, and the third color are different from each other.

Meanwhile, in order to prevent the influence of the change of the viewing angle on the phase retardation amount of each phase retarder, in some embodiments, n of each phase retarder_eThe directions are respectively parallel to the second direction.

According to the reflector of the aerial imaging device provided by the embodiment, the specific filter layer is arranged on the surface of the phase retarder, so that interference light, light leakage and the like can be filtered in a targeted manner, and the imaging effect is improved.

Since the filter layers provided on the respective phase retarders are not necessarily the same, as shown in fig. 18, the present embodiment provides a method of manufacturing a reflection plate in an aerial image forming apparatus having a filter layer, the method including:

the manufacturing method comprises the following steps of S100, dividing a substrate into a plurality of reflecting strip structure areas which are arranged in parallel along a first direction, forming a first color filter layer at a position corresponding to an n-1 th reflecting strip structure area, forming a second color filter layer at a position corresponding to an n-th reflecting strip structure area, and forming a third color filter layer at a position corresponding to an n +1 th reflecting strip structure area on the substrate, wherein n is m +2, m is 3 (i-1), and i is a positive integer;

s200, forming a third phase retarder on the first color filter layer, forming a fourth phase retarder on the second color filter layer, and forming a fifth phase retarder on the third color filter layer;

s300, forming a first ferromagnetic foil, a second ferromagnetic foil and a third ferromagnetic foil on a third phase delay plate, a fourth phase delay plate and a fifth phase delay plate respectively;

s400, forming a sixth phase retarder on the first ferromagnetic foil, forming a seventh phase retarder on the second ferromagnetic foil, and forming an eighth phase retarder on the third ferromagnetic foil;

s500, forming a third color filter layer on a sixth phase delay piece, forming a first color filter layer on a seventh phase delay piece, and forming a second color filter layer on an eighth phase delay piece to form a plurality of reflection bar structures which are arranged in parallel along a first direction, wherein the plurality of reflection bar structures are respectively positioned in a plurality of reflection bar structure areas;

s600, generating a magnetic field with the direction perpendicular to the substrate, and enabling the reflecting strip structure to be erected to form a reflecting strip;

and S700, fixing the formed reflecting strip on the substrate through photosensitive adhesive.

The thickness of the third phase retarder and the thickness of the seventh phase retarder correspond to the wavelength of the first color light, the thickness of the fourth phase retarder and the thickness of the eighth phase retarder correspond to the wavelength of the second color light, and the thickness of the fifth phase retarder and the thickness of the sixth phase retarder correspond to the wavelength of the third color light.

It should be noted that, in the same way as the preparation method provided in the previous embodiment, there is also a problem of the twisted reflective strips, and in order to avoid the problem of the twisted reflective strips, in some embodiments, before generating the magnetic field with the magnetic field direction perpendicular to the substrate, the preparation method may further include: and cutting the plurality of reflection bar structures along the second direction to cut each reflection bar structure into a plurality of reflection bar structures sequentially arranged along the second direction.

In some embodiments, a ratio between a length of the reflective strips in the second direction and a length of the reflective strips in a third direction is greater than 1:1 and less than 10:1, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

In some embodiments, n of each phase retarder of a reflective strip_eThe directions are respectively parallel to the second direction.

It should be noted that the principle and the working flow of the method for manufacturing a reflective plate in aerial imaging equipment provided in this embodiment have similarities with the method for manufacturing a reflective plate in aerial imaging equipment provided in the foregoing embodiment, and reference may be made to the foregoing description for relevant points, and details are not repeated here.

It should be noted that, in addition to the preparation method of the reflector in the aerial imaging device provided by this embodiment, the reflector in the aerial imaging device provided by this embodiment may also be prepared by modifying the preparation method of the reflector in the existing aerial imaging device.

In addition to the aforementioned imaging apparatus for realizing aerial imaging by using the reflecting plate method, as shown in fig. 19, still another embodiment of the present application provides an aerial imaging apparatus including:

a display panel;

a first 1/4 wave plate is arranged on one side, close to the first polarizer, of the aerial imaging equipment, and a second 1/4 wave plate is arranged between the semi-transparent and semi-reflective structure and the semi-transparent and semi-reflective membrane;

the aerial imaging device is used for processing parallel polarized light rays which are emitted by pixels of the display panel and sequentially pass through the micro lens array and the first polarizing device through a light path inside the aerial imaging device, so that the polarized light rays which pass through the second polarizing device form aerial images in a space far away from the display panel.

It should be noted that, the first polarizer provided in this embodiment is configured to absorb polarized light in a specific direction and transmit the polarized light in a direction perpendicular to the specific direction through the first polarizer;

the first polarizing device is used for absorbing polarized light in a specified direction and enabling the polarized light in the direction vertical to the specified direction to transmit through the second polarizing device; in this embodiment, the directions of the polarized light absorbed by the first and second polarizing devices may be parallel or perpendicular, and the first and second polarizing devices may be polarizers or linear polarizers, which are configured according to actual situations.

A first 1/4 wave plate and a second 1/4 wave plate for retarding polarized light passing through themselves by an angle of 45 degrees; that is, the two 1/4 wave plates can delay the phase of the deflected light, and the phase delay of the polarized light passing through the 1/4 wave plate twice is equivalent to the phase delay of the polarized light passing through the 1/2 wave plate once;

the semi-transparent and semi-reflective structure is used for partially transmitting the polarized light reaching the semi-transparent and semi-reflective structure and partially reflecting the polarized light;

the semi-transparent and semi-reflective film is used for partially transmitting the polarized light reaching the semi-transparent and semi-reflective film and partially reflecting the polarized light back along the direction of the incident polarized light.

Fig. 20 is a schematic structural diagram of the semipermeable and semi-reversible membrane provided in this embodiment, and the semipermeable and semi-reversible membrane includes: the retroreflection layer with the microstructure is sequentially arranged on the semitransparent and semi-reflecting layer and the flat layer, and the semitransparent and semi-reflecting layer is far away from the light incidence side of the retroreflection layer.

The semi-transparent and semi-reflective layer can reversely reflect a part of incident light reaching the retro-reflective layer along the incident direction, and the light passing through the semi-transparent and semi-reflective layer is emitted in the incident direction after passing through the flat layer. This semi-transparent semi-reflective membrane utilizes the optics principle of semi-transparent semi-reflective layer and contrary reflective layer, obtains a diaphragm that has special optical effect, and wherein, the contrary reflective layer that has the microstructure sets up in the position that is close incident ray, and the flat bed sets up in the position of light outgoing. In the transflective film shown in fig. 20, the transflective layer is disposed on the light-emitting side of the entire retroreflective layer, and the optical principle is as follows: when the light of arbitrary angle incides the contrary reflective layer of this semi-transparent and semi-reflective membrane, based on the microstructure on this contrary reflective layer, can go back some light along incident direction original road reflection, another part light passes this contrary reflective layer and reachs half reflective layer, because the refraction effect on contrary reflective layer, the direction of the light that reachs half reflective layer changes, the direction of the light that reachs half reflective layer is different rather than the incident direction, the setting of flat bed, can eliminate the change to the light direction by the refraction effect on contrary reflective layer, light is behind the flat bed promptly, can shoot out with original incident direction.

When the semi-transparent and semi-reflective membrane is manufactured, firstly, a reflective layer with a microstructure and a semi-transparent and semi-reflective layer at one side of the reflective layer far away from the transparent substrate are formed on the transparent substrate; then, a planarization layer is formed on the transflective layer.

It should be noted that the material for forming the retroreflective layer is a flexible transparent material, that is, a flexible transparent film layer is formed first, and then the flexible transparent film layer is subjected to an embossing process, so as to emboss a prism structure on the flexible transparent film layer, that is, to form the retroreflective layer having a prism structure, as shown in fig. 21. Subsequently, an extremely thin metal film layer, i.e. a transflective layer, is formed on the prismatic structure of the retroreflective layer, which can be formed on the entire structure of the retroreflective layer, for example, using a magnetron sputtering or evaporation process.

And the micro lens array is used for converting the light rays reaching the micro lens array into parallel light rays to be emitted.

It should be noted that the present embodiment does not limit the specific positions of the transflective structure and the transflective film. In one implementation of the embodiment of the present invention, the transflective film is disposed on a side close to the second polarizer, and the transflective structure is disposed on a side close to the second 1/4 wavelength plate, which is illustrated in fig. 19 as an example. In another implementation manner of the embodiment of the present invention, the transflective film is disposed on a side close to the second 1/4 wavelength plate, and the transflective structure is disposed on a side close to the second polarizer, as shown in fig. 22, which is a schematic structural diagram of another aerial imaging apparatus provided in the embodiment of the present invention, the aerial imaging apparatus in fig. 22 is different from the aerial imaging apparatus in fig. 19 only in that positions of the transflective structure and the transflective film are changed.

In addition, the aerial imaging device shown in fig. 19 and 22 has the same effect on the light emitted by the display panel.

In a specific example, as shown in fig. 23, it is a schematic diagram of an application scene of the aerial imaging device shown in fig. 19, the application scene is an aerial display of a two-dimensional picture, and the control imaging device is horizontally arranged.

The first polarizer and the second polarizer are both configured to pass polarized light in a first direction, such as a direction parallel to a side of the aerial imaging device, and to absorb polarized light in a second direction, which is recorded as a polarization direction

Direction of polarization

Is hereinafter referred to as polarized light

The second direction is a direction parallel to the aerial imaging device and perpendicular to the first directionThe polarized light, which is recorded as polarization direction ≦ or ≦ is hereinafter referred to as polarization direction ≦ or. The optical path in the aerial imaging device shown in fig. 19 during aerial imaging is described in detail below.

1) Pixel light emitted by the display panel is converted into parallel rays after passing through the micro-lens array;

2) after parallel light passes through the first polarizer, the parallel light is polarized

The polarized light is absorbed, so that the parallel light passes through the first polarizer to form polarized light

3) Through which polarized light passes

The light passes through a first 1/4 wave plate and reaches the transflective structure;

4) after passing through the semi-transparent and semi-reflective structure, the reflected polarized light passes through the first 1/4 wave plate again, at this time, the polarized light is changed into a polarized light ^ after passing through the two 1/4 wave plates, and the reflected polarized light ^ is absorbed by the first polarization device finally;

the transmitted polarized light reaches the semi-transparent semi-reverse membrane after passing through the second 1/4 wave plates, and the polarized light at the moment is changed into a polarized light ^ after passing through the two 1/4 wave plates;

5) the polarized light transmitted by the semi-transparent and semi-reflective film is absorbed by the second polarizer, the reflected polarized light returns along the original path, and reaches the semi-transparent and semi-reflective structure again after passing through the second 1/4 wave plate;

6) after passing through the transflective structure, the transmitted polarized light is lost in the chamber (note that the transmitted polarized light passes through the 1/4 wave plate again to become polarized light

If no microlens array is provided, polarized light

After passing through the first polarizer, the light is directly irradiated onto the display panel, which may affect the image quality of the aerial image to some extent. Due to the arrangement of the micro-lens array, the deflected light which penetrates through the first polarizer can be converged in the micro-lens array and then returns to the light-emitting point of the display panel, so that the display-level retroreflection is realized), the reflected polarized light passes through the second 1/4 wave plate again and then reaches the semi-transparent semi-retroreflective film, and the polarization at the moment is changed into polarized light after passing through the two 1/4 wave plates

7) Polarized light transmitted through the semi-transparent semi-reverse film

Emitting from the second polarizer, and forming an aerial image on the light emitting side of the polarizer; reflected polarized light

The semi-transparent semi-reflective structure and the semi-transparent semi-reflective membrane are continuously reflected, the light intensity is sharply reduced, the light cannot be emitted, and the superposed image cannot be generated.

In the aerial imaging device shown in fig. 20, the transmission mode of the polarized light in the transflective structure and the transflective film, and the continuous reflection mode between the transflective structure and the transflective film are similar to the above description, and therefore, no further description is given in this embodiment.

It should be noted that, in the aerial imaging device shown in fig. 19 and fig. 22, the polarization directions of the polarized light that can be passed by the first polarizing device and the second polarizing device are the same, that is, the passing axes of the first polarizing device and the second polarizing device are arranged in parallel. In addition, in the aerial imaging apparatus shown in fig. 19 and 22, the first polarizing device and the second polarizing device are not limited to pass only polarized light

And absorbs the polarized light ≦ ≦ the; the first and second polarizing devices may be configured to pass polarized light ^ and absorb polarized light ^

The aerial imaging device provided by the embodiment can effectively carry out aerial imaging on the picture displayed by the display panel, has a good imaging effect, is simple in structure, easy to realize, small in size and can be of a flat plate structure.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is further noted that, in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the above-mentioned examples are given for the purpose of illustrating the present application clearly and not for the purpose of limiting the same, and that various other modifications and variations of the present invention may be made by those skilled in the art in light of the above teachings, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed.

Claims

1. A preparation method of a reflecting plate in aerial imaging equipment is characterized by comprising the following steps:

a magnetic field is generated with a magnetic field direction perpendicular to the substrate such that the reflective strip structure is erected to form a reflective strip.

2. The method of claim 1, wherein cutting the first phase retarder, ferromagnetic foil and second phase retarder into a plurality of reflective strip structures arranged in parallel along a first direction comprises: and cutting the first phase retarder, the ferromagnetic foil and the second phase retarder along a first direction and a second direction respectively to form a plurality of reflective strip structure groups which are arranged in parallel along the first direction, wherein each reflective strip structure group comprises a plurality of reflective strip structures which are sequentially arranged along the second direction respectively, and the second direction is perpendicular to the first direction.

3. The method of claim 2, wherein a ratio of a length of the reflective strip in the second direction to a length of the reflective strip in a third direction is greater than 1:1 and less than 10:1, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

4. The method of claim 1, wherein n of the first retarder of the reflective strip_eDirection and n of second phase delay piece_eThe directions are respectively parallel to a second direction, the second direction is perpendicular to the first direction, and a plane formed by the second direction and the first direction is parallel to the substrate.

5. A preparation method of a reflecting plate in aerial imaging equipment is characterized by comprising the following steps:

dividing a substrate into a plurality of reflecting strip structure areas which are arranged in parallel along a first direction, forming a first color filter layer at a position corresponding to an n-1 th reflecting strip structure area, forming a second color filter layer at a position corresponding to an n-th reflecting strip structure area, and forming a third color filter layer at a position corresponding to an n +1 th reflecting strip structure area on the substrate, wherein n is m +2, m is 3 (i-1), and i is a positive integer;

6. The method of claim 5, wherein prior to said generating the magnetic field having a direction perpendicular to the substrate, the method further comprises: and cutting the plurality of reflection bar structures along a second direction to cut each reflection bar structure into a plurality of reflection bar structures sequentially arranged along the second direction, wherein the second direction is perpendicular to the first direction.

7. The method of claim 6, wherein a ratio of a length of the reflective strip in the second direction to a length of the reflective strip in a third direction is greater than 1:1 and less than 10:1, wherein the third direction is perpendicular to the first direction and the second direction, respectively.

8. The method of claim 5, wherein n of each retarder of the reflective strip_eThe directions are respectively parallel to a second direction, the second direction is perpendicular to the first direction, and a plane formed by the second direction and the first direction is parallel to the substrate.

9. The reflecting plate of the aerial imaging device is characterized by comprising a substrate and a plurality of reflecting strips which are formed on the substrate and arranged in parallel along a first direction;

10. The reflection plate as claimed in claim 9, wherein n of each phase retarder_eThe directions are respectively parallel to a second direction, the second direction is perpendicular to the first direction, and a plane formed by the second direction and the first direction is parallel to the substrate.

11. An aerial imaging device comprising a display panel, a reflection plate produced by the production method according to any one of claims 1 to 4, a first polarizing plate and a second polarizing plate;

12. An aerial imaging device comprising a display panel, the reflection plate according to claim 9 or 10, a first polarizing plate, and a second polarizing plate;

the display panel comprises a first color photon pixel, a second color photon pixel and a third color photon pixel, the projection of a spacing region between the (n-1) th reflector strip and the (n + 1) th reflector strip on the display panel corresponds to the first color photon pixel, the projection of a spacing region between the (n + 1) th reflector strip and the (n + 2) th reflector strip on the display panel corresponds to the second color photon pixel, and the projection of a spacing region between the (n + 1) th reflector strip and the (n + 2) th reflector strip on the display panel corresponds to the third color photon pixel.

13. An aerial imaging device, comprising:

a display panel;