Aerial imaging device, reflector and preparation method thereof

Abstract

The embodiments of the present application disclose an aerial imaging device, a reflector, and a method for making the same. A specific implementation of the preparation method includes: forming a first phase delay plate, a ferromagnetic foil, and a second phase delay plate stacked in sequence on a substrate; cutting the first phase delay plate, the ferromagnetic foil, and the second phase delay plate to form a plurality of reflective strip structures arranged in parallel along a first direction; generating a magnetic field perpendicular to the substrate so that the reflective strip structure stands upright to form a reflective strip. This implementation has a simple process and is easy to implement, which overcomes the difficulty of attaching phase delay plates on both sides of the reflective strip. In addition, due to the repulsive force between the reflective strips, the reflective strips can be evenly spaced on the substrate, thereby improving the imaging effect of the aerial imaging device.

Description

Technical Field

[0001] The present application relates to the field of aerial display technology, and more specifically, to an aerial imaging device, a reflective plate and a method for preparing the same. Background Art

[0002] Aerial imaging technology refers to the direct display of two-dimensional or three-dimensional images in the air without any medium. People or objects can directly pass through the image, thus achieving excellent interactive and immersive display effects.

[0003] At present, the more mature aerial display products on the market are mostly projection technology applications, such as aerosol projection display, holographic projection display and laser projection display. However, the existing aerial imaging technology generally has the following disadvantages: the display device is too large and the structure of the display device is complex, the displayed graphics are simple, the display effect is poor, and it is difficult to effectively realize the display of three-dimensional images. The preparation process is complicated and the preparation cost is high. Summary of the invention

[0004] The purpose of the present application is to provide an aerial imaging device, a reflective plate and a method for preparing the same, so as to solve at least one of the problems existing in the prior art.

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

[0006] The first aspect of the present application provides a method for preparing a reflector in an aerial imaging device, the method comprising:

[0007] Forming a first phase retarder, a ferromagnetic foil and a second phase retarder which are sequentially stacked on a substrate;

[0008] Cutting the first phase delay plate, the ferromagnetic foil and the second phase delay plate to form a plurality of reflection strip structures arranged in parallel along a first direction;

[0009] A magnetic field is generated with a direction perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip.

[0010] The method for preparing a reflective plate in an aerial imaging device provided in the first aspect of the present application has a simple process and is easy to implement. It overcomes the difficulty of attaching phase delay plates on both sides of the reflective strips. In addition, due to the repulsive force between the reflective strips, the reflective strips can be evenly spaced on the substrate, thereby improving the imaging effect of the aerial imaging device.

[0011] In a possible implementation, cutting the first phase delay plate, the ferromagnetic foil and the second phase delay plate into a plurality of reflection strip structures arranged in parallel along a first direction comprises: cutting the first phase delay plate, the ferromagnetic foil and the second phase delay plate respectively along the first direction and the second direction to form a plurality of reflection strip structure groups arranged in parallel along the first direction, each reflection strip structure group respectively comprising a plurality of reflection strip structures arranged in sequence along the second direction, wherein the second direction is perpendicular to the first direction.

[0012] In this implementation, by cutting the reflective strip structure in the second direction, the length of each reflective strip structure can be reduced, so that no distortion exists in a single reflective strip, and by reducing the length of a single reflective strip, the risk of its falling over is reduced.

[0013] In a possible implementation, a ratio of a length of the reflective strip along the second direction to a length of the reflective strip along 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.

[0014] In this implementation, the length and width of the reflective strip structure are different, which facilitates its erection in the magnetic field.

[0015] In a possible implementation, the first phase delay plate of the reflection strip has n e direction and the second phase retarder n e The 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.

[0016] In this implementation, the phase delay plate can be e By setting the direction accordingly, the change in phase delay caused by the change in viewing angle can be reduced.

[0017] A second aspect of the present application provides a method for preparing a reflective plate in an aerial imaging device, the method comprising: dividing a substrate into a plurality of reflective strip structure regions arranged in parallel along a first direction, forming a first color filter layer at a position corresponding to the n-1th reflective strip structure region on the substrate, forming a second color filter layer at a position corresponding to the nth reflective strip structure region, and forming a third color filter layer at a position corresponding to the n+1th reflective strip structure region, where n=m+2, m=3*(i-1), and i is a positive integer;

[0018] 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;

[0019] forming a first ferromagnetic foil, a second ferromagnetic foil and a third ferromagnetic foil on the third phase retarder, the fourth phase retarder and the fifth phase retarder respectively;

[0020] 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;

[0021] 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 reflection strip structures arranged in parallel along a first direction, wherein the plurality of reflection strip structures are respectively located in a plurality of reflection strip structure regions;

[0022] generating a magnetic field with a magnetic field direction perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip;

[0023] Among them, the thickness of the third phase delay plate and the thickness of the seventh phase delay plate correspond to the wavelength of the first color light, the thickness of the fourth phase delay plate and the thickness of the eighth phase delay plate correspond to the wavelength of the second color light, and the thickness of the fifth phase delay plate and the thickness of the sixth phase delay plate correspond to the wavelength of the third color light.

[0024] The method for preparing a reflector in an aerial imaging device provided in the second aspect of the present application has a simple process and is easy to implement, and overcomes the difficulty of attaching a phase delay plate and a filter layer on both sides of the reflective strip. In addition, due to the repulsive force between the reflective strips, the reflective strips can be evenly spaced on the substrate, thereby improving the imaging effect of the aerial imaging device. The reflector prepared by the method for preparing a reflector in an aerial imaging device provided in the second aspect of the present application has a filter layer on the surface of the phase delay plate, which can prevent light leakage and interference light problems.

[0025] In a possible implementation, before generating a magnetic field whose direction is perpendicular to the magnetic field of the substrate, the method for preparing a reflective plate in the aerial imaging device further includes: cutting the multiple reflective strip structures along a second direction to cut each reflective strip structure into a plurality of reflective strip structures arranged in sequence along the second direction, wherein the second direction is perpendicular to the first direction.

[0026] In this implementation, by cutting the reflective strip structure in the second direction, the length of each reflective strip structure can be reduced, so that no distortion exists in a single reflective strip, and by reducing the length of a single reflective strip, the risk of its falling over is reduced.

[0027] In a possible implementation, a ratio of a length of the reflective strip along the second direction to a length of the reflective strip along 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.

[0028] In this implementation, the length and width of the reflective strip structure are different, which facilitates erection in the magnetic field.

[0029] A third aspect of the present application provides a reflective plate for an aerial imaging device, comprising a substrate and a plurality of reflective strips formed on the substrate and arranged in parallel along a first direction;

[0030] The first reflection surface of the n-1th reflection strip is provided with a sixth phase retarder, and the second reflection surface is provided with a third phase retarder, the sixth phase retarder is provided with a third color filter layer, and the third phase retarder is provided with a first color filter layer;

[0031] The first reflection surface of the nth reflection strip is provided with a seventh phase retarder, and the second reflection surface is provided with a fourth phase retarder, 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;

[0032] The first reflection surface of the n+1th reflection strip is provided with an eighth phase retarder, and the second reflection 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;

[0033] Among them, 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=m+2, m=3*(i-1), i is a positive integer.

[0034] In a possible implementation, the number of n of each phase retarder is e The 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.

[0035] The fourth aspect of the present application provides an aerial imaging device, comprising a display panel, a reflective plate prepared by the method for preparing a reflective plate in an aerial imaging device provided in the first aspect of the present application, a first polarizer, and a second polarizer;

[0036] The reflector is used to converge the light emitted by the display panel arranged on one side of the reflector to the other side of the reflector to form a corresponding image;

[0037] The first polarizer is disposed between the display panel and the reflector, the second polarizer is disposed on a side of the reflector away from the display panel, and the light transmission axes of the first polarizer and the second polarizer are in different directions.

[0038] A fifth aspect of the present application provides an aerial imaging device, comprising a display panel, a reflective plate of the aerial imaging device provided in the third aspect of the present application, a first polarizer, and a second polarizer;

[0039] The reflector is used to converge the light emitted by the light-emitting entity arranged on one side of the reflector to the other side of the reflector to form a corresponding image;

[0040] The first polarizer is arranged between the display panel and the reflector, the second polarizer is arranged on a side of the reflector away from the display panel, and the light transmission axis directions of the first polarizer and the second polarizer are different;

[0041] The display panel includes a first color photon pixel, a second color photon pixel and a third color photon pixel, a projection of a spacing area between an n-1th reflection bar and an nth reflection bar on the display panel corresponds to the first color photon pixel, a projection of a spacing area between an nth reflection bar and an n+1th reflection bar on the display panel corresponds to the second color photon pixel, and a projection of a spacing area between an n+1th reflection bar and an n+2th reflection bar on the display panel corresponds to the third color photon pixel.

[0042] A sixth aspect of the present application provides an aerial imaging device, comprising:

[0043] Display panel;

[0044] A first polarizing element and a second polarizing element are arranged on the cell;

[0045] A semi-transparent and semi-reflective structure and a semi-transparent and semi-reversible film are arranged between the first polarizing device and the second polarizing device;

[0046] A first quarter wave plate is arranged on the side of the aerial imaging device close to the first polarizing element, and a second quarter wave plate is arranged between the semi-transmissive and semi-reflective structure and the semi-transmissive and semi-reverse reflection film;

[0047] A microlens array for converting light emitted by pixels of the display panel into parallel light is arranged between the first polarizing device and the display panel, and the display panel is located on the focal plane of the microlens array;

[0048] The aerial imaging device is used to process the parallel polarized light emitted by the pixels of the display panel and sequentially passing through the microlens array and the first polarizing device through the optical path inside the aerial imaging device, so that the polarized light passing through the second polarizing device forms an aerial image in a space far away from the display panel.

[0049] The sixth aspect of the present application provides an aerial imaging device, including a display panel, a first polarizer and a second polarizer arranged in a box, a microlens array arranged between the display panel and the first polarizer, a semi-transparent and semi-reflective structure and a semi-transparent and semi-reverse reflection film arranged between the first polarizer and the second polarizer, a first 1 / 4 wavelength plate arranged on the side close to the first polarizer in the aerial display device, a second 1 / 4 wavelength plate arranged between the semi-transparent and semi-reverse reflection structure and the semi-transparent and semi-reverse reflection film, and polarized light emitted by the light source and passing through the first polarizer is processed by the optical path inside the aerial display device, and polarized light passing through the second polarizer forms an aerial image on the side of the aerial display device away from the light source. The aerial imaging device has a good imaging effect, and the aerial imaging device has a simple structure, is easy to implement, and has a small volume, and can be a flat plate structure.

[0050] The beneficial effects of this application are as follows:

[0051] The aerial imaging device provided in the present application has a simple structure, is easy to implement, has a small size, has a good imaging effect, and has a simple preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The specific implementation methods of the present application are further described in detail below in conjunction with the accompanying drawings.

[0053] Figure 1 The invention shows a structural diagram of a device for realizing aerial imaging by means of a reflector.

[0054] Figure 2 A diagram showing the imaging principle of a device that realizes aerial imaging through a reflective plate.

[0055] Figure 3 A schematic diagram showing that the device for achieving aerial imaging through a reflector has invalid light interference during imaging.

[0056] Figure 4 A schematic diagram showing the principle of filtering out invalid light in a device that achieves aerial imaging through a reflector.

[0057] Figure 5 The figure shows the structure of the device that realizes aerial imaging by two sets of reflectors.

[0058] Figure 6 (a) shows the imaging principle diagram (front view) of the device that realizes aerial imaging through two sets of reflective plates.

[0059] Figure 6 (b) shows the imaging principle diagram (top view) of the device that realizes aerial imaging through two sets of reflective plates.

[0060] Figure 7 A flow chart of a method for preparing a reflective plate in an aerial imaging device provided by one embodiment of the present application is shown.

[0061] Figure 8-Figure 11 The diagram shows an intermediate structure that occurs during the process of preparing a reflective plate in an aerial imaging device according to a method for preparing the reflective plate provided by one embodiment of the present application.

[0062] Fig.12 Schematic diagram showing the distortion and collapse of the reflective strip.

[0063] Fig.13 A schematic diagram showing an improved method for preparing a reflective plate in an aerial imaging device provided by one embodiment of the present application to solve the problem of distortion and collapse of reflective strips.

[0064] Fig.14 A schematic diagram showing the existence of smear when imaging a device that realizes aerial imaging through a reflective plate.

[0065] Fig.15 (a) shows the phase retardation plate with different n e Schematic diagram of the reflection of light in the direction.

[0066] Fig.15 (b) shows the phase retardation plate with different n e A diagram showing the changes in viewing angle and phase delay under different directions.

[0067] Fig.16 A schematic diagram of the structure of an aerial imaging device provided by one embodiment of the present application is shown.

[0068] Fig.17 A schematic diagram of the structure of an aerial imaging device provided by one embodiment of the present application is shown.

[0069] Fig.18 A flow chart of a method for preparing a reflective plate in an aerial imaging device provided by one embodiment of the present application is shown.

[0070] Fig.19 A schematic diagram of the structure of an aerial imaging device provided by an embodiment of the present application is shown.

[0071] Fig. 20 A schematic diagram of the structure of a semi-permeable and semi-reversible membrane provided by an embodiment of the present application is shown.

[0072] Fig.21 A physical picture of a semi-transmissive and semi-reversible membrane provided by an embodiment of the present application is shown.

[0073] Fig. 22 A schematic diagram of the structure of an aerial imaging device provided by an embodiment of the present application is shown.

[0074] Fig.23 A schematic diagram showing the optical path of an aerial imaging device provided by one embodiment of the present application is shown. DETAILED DESCRIPTION

[0075] In order to more clearly illustrate the present application, the present application is further described below in conjunction with the embodiments and drawings. Similar components in the drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the content specifically described below is illustrative rather than restrictive, and should not be used to limit the scope of protection of the present application.

[0076] In the prior art, aerial imaging is often achieved in the following ways: 1) It is through aerosol projection display, projecting the picture onto the aerosol, but this projection method has the problem of unstable image quality. 2) It is through holographic projection display, the light emitted by the light source is divided into two beams, one beam is directly projected to the photosensitive film, and the other beam is reflected by the object and then projected to the photosensitive film. The two beams of light are superimposed on the photosensitive film to produce interference, and a holographic image is obtained, but the display equipment of this imaging method is large and the display clarity is poor. 3) Laser projection display is to ionize the air in a closed container, and use laser laser to present a three-dimensional picture, but the picture is prone to fluctuation, instability, and the color is relatively single.

[0077] Based on this, the inventor proposes a method as follows Figure 1 The aerial imaging device shown includes a first reflecting plate 10, which includes a plurality of reflecting strips 11 arranged in parallel along the X-axis direction and a substrate 12 carrying the plurality of reflecting strips, the plurality of reflecting strips 11 are used to converge the 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 the connecting line between the light-emitting entity 20 and the corresponding image 30 is located parallel to the Z-axis direction, and the Z-axis direction is perpendicular to the X-axis.

[0078] It should be noted that the light-emitting entity 20 is actually a display panel or a light-emitting object.

[0079] Reference Figure 2 The imaging principle of the aerial imaging device is that when multiple reflective strips 11 are arranged in parallel along the X-axis direction, the emitted light of the light-emitting entity 20 is re-converged in the direction parallel to the Z-axis, and it looks like the light-emitting object is floating in the air to the observer, thereby realizing aerial imaging. Aerial imaging can be realized by arranging multiple reflective strips 11 in parallel, and the imaging device is small in size and low in preparation cost.

[0080] It should be noted that when the aerial imaging device is imaging, the light emitted by the light-emitting entity 20 is reflected by the first reflector 10, which is affected by the position of each reflective strip 11 in the first reflector 10, causing some light to fail to converge into an image. Figure 3 As shown, when light rays n1, n2 and n5 pass through the first reflector 10, they can converge to form an image, but light rays n3, n4 and n6 cannot converge to form an image, and become background light or interference light, resulting in blurred or unclear images. For the convenience of description and understanding, we define that light rays that can converge to form an image are effective light rays, otherwise, they are invalid light rays.

[0081] When the inventor studied the light emitted by the light-emitting entity 20, he found that there is the following relationship between the light and the reflective strip 11:

[0082] When the number of reflections of the light on the reflection strip 11 is an odd number, it will eventually become a valid light, such as the light n1, n2 and n5; otherwise, it will become an invalid light, such as the light n3, n4 and n6.

[0083] Based on this discovery, the inventors have improved the aerial imaging device to filter out invalid light. Figure 4 First, a first polarizer 61 is set on the side of the first reflector facing the light-emitting entity 20, and a second polarizer 62 is set on the side away from the light-emitting entity, and the first polarizer 61 and the second polarizer 62 have opposite absorption and transmission relationships for transverse and longitudinal light, that is, when the first polarizer 61 is set to absorb transverse light and transmit longitudinal light, the second polarizer 62 absorbs longitudinal light and transmits transverse light; when the first polarizer 61 is set to absorb longitudinal light and transmit transverse light, the second polarizer 62 absorbs transverse light and transmits longitudinal light; then, phase delay plates 70 are set on both sides of each reflective strip.

[0084] It is easy to understand that the phase retarder 70 can change the wave directionality of light. For example, when the light incident on the surface of the phase retarder 70 is a transverse wave, it will become a longitudinal wave when it exits the phase retarder 70; when the light incident on the surface of the phase retarder 70 is a longitudinal wave, it will become a transverse wave when it exits the phase retarder.

[0085] Continue to refer Figure 4 Taking the first polarizer 61 absorbing transverse waves and transmitting longitudinal waves, and the second polarizer 62 absorbing longitudinal waves and transmitting transverse waves as an example, the filtering method is described as follows:

[0086] 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. The light incident on the first reflector 10 is all longitudinal wave. Taking the light n1 to n6 as an example, n1 and n2 are both reflected by the reflection strip 11 once, and when passing through the phase delay plate 70 provided on the reflection strip 11, the longitudinal wave is changed into a transverse wave, and finally passes through the second polarizer 62. The second polarizer 62 absorbs the longitudinal wave and transmits the transverse wave, and will not affect n1 and n2. n1 and n2 are imaged after passing through the second polarizer 62; the light n3 and n4 are not reflected by the reflection strip 11 , directly incident on the second polarizer 62, since n3 and n4 are both longitudinal waves, they will be absorbed by the second polarizer 62 and cannot pass through the second polarizer 62; the light n5 will be reflected three times on the reflection strip 11 of the reflection plate 10, and the light will undergo a series of changes from longitudinal wave → transverse wave → longitudinal wave → transverse wave, and finally incident on the second polarizer 62, and be imaged through the second polarizer 62; the light n6 will be reflected four times on the reflection strip 11 of the reflection plate 10, and the light will undergo a series of changes from longitudinal wave → transverse wave → longitudinal wave → transverse wave → longitudinal wave, and finally incident on the second polarizer 62, and be absorbed by the second polarizer 62.

[0087] It is easy to understand that when the first polarizer 61 absorbs longitudinal waves and transmits transverse waves, and the second polarizer 62 absorbs transverse waves and transmits longitudinal waves, the principle is similar to the above-mentioned example of the first polarizer 61 absorbing transverse waves and transmitting longitudinal waves, and the second polarizer 62 absorbing longitudinal waves and transmitting transverse waves, and will not be repeated here.

[0088] Through this improvement of the aerial imaging equipment, the impact of invalid light on imaging can be fundamentally filtered out and the imaging quality can be improved.

[0089] It should be noted that, since there is only a single reflector 10, the light-emitting entity 20 can only be projected onto a plane. For example, the multiple reflector strips 11 arranged in parallel along the X-axis can only converge the light incident on a plane parallel to the plane formed by the X-axis and the Z-axis into an image, while the light incident in the Y-axis direction cannot be converged and emitted, resulting in the converged image being unable to present a three-dimensional sense.

[0090] Therefore, if Figure 5 As shown, the aerial imaging device also includes a second reflective plate 40, which is stacked on the light-emitting side of the first reflective plate 10 and includes a plurality of reflective strips 42 arranged in parallel along the Y-axis direction; the Y-axis direction is parallel to the X-axis direction and the Z-axis direction respectively.

[0091] For the convenience of description and understanding, the reflection strips 11 of the first reflection plate 10 are referred to as first reflection strips 11 ; and the reflection strips 41 of the second reflection plate 40 are referred to as second reflection strips 41 .

[0092] refer to Figure 6 ,exist Figure 6 In (a), part of the light emitted by the light-emitting entity 20 to the first reflection bar 11 is directly converged onto the image after reflection, and another part of the light (light d in the figure) is reflected by the first reflection bar 11 to the second reflection bar 41, and then converged onto the image 30 after reflection by the second reflection bar 41. Figure 6 (b) is a top view of the direction of the light d. It can be seen that if there is no second reflective strip 41, the light d will be directly reflected out of the imaging device. Therefore, the second reflective plate 40 is provided to allow more light to converge into an image, making the image more three-dimensional and clear.

[0093] It should be noted that the first reflective plate 10 and the second reflective plate 40 are identical except for the different setting directions of the reflective strips. However, in the imaging device, the second reflective plate 40 is set on the light-emitting side of the first reflective plate 10, and the first reflective strip 11 of the first reflective plate 10 is set perpendicular to the second reflective strip 41 of the second reflective plate 40.

[0094] It is easy to understand that when the aerial imaging device includes a first reflector 10 and a second reflector 40, the principle and method of filtering out invalid light on the second reflector 40 are the same as when the aerial imaging device only includes the first reflector 10, and will not be repeated here.

[0095] For the above-mentioned aerial imaging device, since phase delay plates 70 need to be provided at both ends of the reflection strip, there are problems such as complicated manufacturing process during the manufacturing process.

[0096] The more commonly used reflector preparation processes are:

[0097] First, a substrate is formed, and a plurality of reflective strips are formed on the substrate by gluing or other methods;

[0098] Then, phase retardation plates are attached to both sides of the reflective strip.

[0099] Based on the above method, when forming the reflection plate, the attachment of the phase delay plate needs to be repeated multiple times, which makes the preparation process complicated.

[0100] In order to optimize the preparation process of reflectors in aerial imaging equipment, such as Figure 7 As shown, one embodiment of the present application provides a method for preparing a reflective plate in an aerial imaging device, the preparation method comprising:

[0101] S10, forming a first phase retarder, a ferromagnetic foil and a second phase retarder which are sequentially stacked on a substrate;

[0102] Specifically, first, the first phase delay plate is laid flat on the substrate, and then the ferromagnetic foil is attached to the upper surface of the first phase delay plate, and then the second phase delay plate is attached to the upper surface of the ferromagnetic foil, and finally the following is formed: Figure 8 The structure shown.

[0103] It should be noted that if Fig. 9 As shown, the first phase retarder and the second phase retarder may be respectively attached to the two sides of the ferromagnetic foil and then laid flat on the substrate.

[0104] It should be noted that the structure formed by the substrate, the first phase retarder, the ferromagnetic foil and the second phase retarder is not cured in this step.

[0105] S20, cutting the first phase retarder, the ferromagnetic foil and the second phase retarder to form a plurality of reflection strip structures arranged in parallel along a first direction;

[0106] Specifically, a structure formed by the first phase delay plate, the ferromagnetic foil and the second phase delay plate is uniformly cut by a cutter wheel or laser to form a plurality of reflective strip structures arranged in parallel along a first direction, such as Fig.10 The structure shown.

[0107] It should be noted that the first direction is the X-axis direction mentioned above.

[0108] S30, generating a magnetic field whose direction is perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip;

[0109] Specifically, refer to Fig.11 The reflective strip structure formed after cutting is a rectangular parallelepiped with different lengths and widths. When the magnetic field passes through the ferromagnetic foil, it will try to pass through the inside of the ferromagnetic foil, making the energy in the system lower. The longer the length of the magnetic flux lines in the ferromagnetic foil, the lower the potential energy of the system. Therefore, when a strong magnetic field passes through ferromagnetic foils with different lengths and widths, the long sides of the ferromagnetic foil will be arranged along the magnetic flux lines.

[0110] That is, the reflection strip structure formed after cutting is rotated 90° clockwise (or 90° counterclockwise) and stands upright in the plane of the substrate under the action of the magnetic field to form the final reflection strip structure.

[0111] It should be noted that by adding a magnetic field to make the reflective strip structure stand upright, the reflective strip structure may be distorted (e.g. Fig.12 This is because, under the action of a strong magnetic field, the reflective strip structure may not be in the lowest potential energy state, and may also exist in other metastable states, which will affect the imaging quality of aerial imaging equipment.

[0112] To avoid the problem of distortion of the reflective strip, in some embodiments, step S20 further includes the following sub-steps:

[0113] The first phase delay plate, the ferromagnetic foil and the second phase delay plate are cut along the first direction and the second direction respectively to form a plurality of reflection strip structure groups arranged in parallel along the first direction, each reflection strip structure group comprises a plurality of reflection strip structures arranged in sequence along the second direction, that is, Fig.13 The structure shown in FIG.

[0114] It should be noted that the second direction is the Y-axis direction mentioned above.

[0115] By reducing the length of each reflective strip structure, distortion cannot exist in a single reflective strip, and by reducing the length of a single reflective strip, the risk of its falling over is reduced.

[0116] As mentioned above, when a magnetic field is added, the reflective strip structure stands up to form a reflective strip. The principle is that the length and width of the reflective strip structure are different. Therefore, when the reflective strip structure is cut in the second direction Y, it is necessary to ensure that the length and width of the reflective strip structure after cutting are not equal. Therefore, in some embodiments, the ratio between the length of the reflective strip along the second direction and the length of the reflective strip along the 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.

[0117] It should be noted that the third direction is the Z-axis direction mentioned above.

[0118] 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 in order to make the length and width of the pixel strip different so that the pixel strip structure can stand upright; 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 less than 10:1 in order to greatly reduce the height of the pixel strip (the height in the Z-axis direction). This is because, for example Fig.14 As shown in the figure, due to the existence of the reflection strip height c, the imaging of the aerial imaging device will have a certain amount of smear S. Fig.14 From the geometric relationship in , we can see that there is the following relationship between the smear S and the height c of the reflection strip:

[0119] S=2*c, therefore, the smaller c is, the better.

[0120] It should be noted that if c is too small, unclear imaging may occur. The specific value of c can be obtained through multiple experiments or simulations, which will not be repeated here.

[0121] It is easy to understand that the effect of the phase retarder on light regulation depends on the phase retardation of the phase retarder, which is determined by the birefringence and thickness of the phase retarder. At the normal viewing angle, the phase retardation value can be expressed as (n e -n0)*d, where n e is the refractive index of the material along the optical axis, n0 is the refractive index of the material along the direction perpendicular to the optical axis, (n e -n0) represents the birefringence of the phase retarder, and d is the thickness of the phase retarder. When the viewing angle changes, both the birefringence and the thickness change, which causes the phase retardation to change.

[0122] In order to reduce the change of the phase delay amount with the change of the viewing angle, in some embodiments, the first phase delay plate of the reflective strip has n e direction and the second phase retarder n e directions are respectively parallel to the second direction.

[0123] It should be noted that n e The direction is the optical axis direction of the phase retarder.

[0124] In a specific example, refer to Fig.15 , Fig.15 In (a), Case 1 represents n e The direction is parallel to the first direction, and Case 2 represents n e The direction is parallel to the second direction, and Case 3 represents n e The direction is parallel to the third direction.

[0125] After experimental simulation, we get Fig.15 (b) shows the relationship between the phase delay and the viewing angle. It can be concluded that when the first phase delay plate has n e direction and the second phase retarder n e When the directions are parallel to the second direction, the phase delay amount changes minimally with the viewing angle.

[0126] S40, fixing the formed reflective strip on the substrate by using photosensitive adhesive.

[0127] The method for preparing the reflective plate in the aerial imaging device provided in this embodiment has a simple process and is easy to implement. It overcomes the difficulty of attaching phase delay plates on both sides of the reflective strips. In addition, due to the repulsive force between the reflective strips, the reflective strips can be evenly spaced on the substrate, thereby improving the imaging effect of the imaging device.

[0128] It should be noted that, for the aerial imaging device mentioned above, which includes a first reflector and a second reflector, both the first reflector and the second reflector can be prepared by the preparation method. When preparing the second reflector, except for the difference in direction description from the first reflector, other steps are the same.

[0129] As mentioned above, by setting phase delay plates on both sides of the reflective strip, the influence of invalid light on the imaging effect can be effectively reduced. However, it cannot be ignored that the light emitted by the light-emitting entity is three kinds of RGB light. When the three kinds of RGB light pass through the phase delay plate at the same time, their polarization deflections are different. In previous designs, the phase delay plate usually set is only designed for one color of light. For example, only the phase delay plate corresponding to green light (G light) is used. When red light (R light) and blue light (B light) pass through the phase delay plate, there will be a certain degree of phase matching problem. Specifically, when the red light and the blue light pass through the phase delay plate, there will be a certain degree of light leakage and stray light interference.

[0130] To solve this problem, Fig.16 As shown, another embodiment of the present application provides a reflective plate of an aerial imaging device, including a substrate and a plurality of reflective strips formed on the substrate and arranged in parallel along a first direction;

[0131] The first reflection surface of the n-1th reflection strip is provided with a sixth phase retarder, the second reflection surface is provided with a third phase retarder, the sixth phase retarder is provided with a third color filter layer, and the third phase retarder is provided with a first color filter layer;

[0132] The first reflection surface of the nth reflection strip is provided with a seventh phase retarder, the second reflection surface is provided with a fourth phase retarder, 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;

[0133] The first reflection surface of the n+1th reflection strip is provided with an eighth phase retarder, the second reflection 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;

[0134] Among them, 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=m+2, m=3*(i-1), i is a positive integer.

[0135] In a specific example, refer to Fig.17For ease of understanding, only the reflective plate of the aerial imaging device including four groups of reflective strips is shown, wherein, in order from left to right, the first reflective strip corresponds to the n-1th reflective strip; the second reflective strip corresponds to the nth reflective strip; the third reflective strip corresponds to the n+1th reflective strip; and the fourth reflective strip corresponds to the n+2th reflective strip.

[0136] The phase retarder disposed on the left side of the first reflective strip corresponds to the sixth phase retarder, and the third color filter layer (i.e., the B filter layer in the figure) is disposed correspondingly;

[0137] The phase retarder disposed on the right side of the first reflective strip corresponds to the third phase retarder, and the first color filter layer (i.e., the R filter layer in the figure) is disposed correspondingly;

[0138] The phase retarder disposed on the left side of the second reflective strip corresponds to the seventh phase retarder, and corresponds to the first color filter layer (i.e., the R filter layer in the figure);

[0139] The phase retarder disposed on the right side of the second reflective strip corresponds to the fourth phase retarder, and the second color filter layer (i.e., the G filter layer in the figure) is disposed correspondingly;

[0140] The phase retarder disposed on the left side of the third reflective strip corresponds to the eighth phase retarder, and the second color filter layer (i.e., the G filter layer in the figure) is disposed correspondingly;

[0141] The phase retarder disposed on the right side of the third reflective strip corresponds to the fifth phase retarder, and the third color filter layer (i.e., the B filter layer in the figure) is correspondingly disposed;

[0142] The phase retarder disposed on the left side of the fourth reflective strip corresponds to the sixth phase retarder, and the third color filter layer (i.e., the B filter layer in the figure) is disposed correspondingly;

[0143] The phase retarder disposed on the right side of the fourth reflective strip corresponds to the third phase retarder, and corresponds to the first color filter layer (ie, the R filter layer in the figure).

[0144] As a result, a filter layer of the same color is arranged on the phase delay plate arranged at the relative position of two adjacent reflection strips.

[0145] Right now, Fig.17 In the embodiment, the inner sides of the channel 1 formed between the first reflective strip and the second reflective strip are provided with filter layers of the same color (R filter layers). The inner sides of the channel 2 formed between the second reflective strip and the third reflective strip are provided with filter layers of the same color (G filter layers). The inner sides of the channel 3 formed between the third reflective strip and the fourth reflective strip are provided with filter layers of the same color (B filter layers).

[0146] When RGB light passes through channel 1, both G light and B light will be absorbed by the R filter layer, and only R light can be imaged after an odd number of reflections in channel 1.

[0147] It should be noted that the thickness of the phase retarder is based on the wavelength of the color of the filter layer disposed on its surface, and its purpose is to ensure the phase shift of light of a specific color after passing through the phase retarder.

[0148] In a specific example, the wavelength of red light (R light) is ˜600 nm, the wavelength of green light (G light) is ˜550 nm, and the wavelength of blue light (B light) is ˜480 nm.

[0149] It should be noted that the first color, the second color and the third color in this example can be matched with the three colors of RGB respectively, but the first color, the second color and the third color are different from each other.

[0150] At the same time, in order to prevent the change of viewing angle from affecting the phase retardation of each phase retarder, in some embodiments, the n of each phase retarder is e directions are respectively parallel to the second direction.

[0151] Based on the reflector of the aerial imaging device provided in this embodiment, by setting a specific filter layer on the surface of the phase delay plate, interference light and leakage light can be filtered out in a targeted manner to improve the imaging effect.

[0152] Since the filter layers set on each phase retarder are not necessarily the same, Fig.18 As shown, this embodiment provides a method for preparing a reflector in an aerial imaging device having a filter layer, the method comprising:

[0153] S100, dividing the substrate into a plurality of reflection strip structure regions arranged in parallel along a first direction, forming a first color filter layer at a position corresponding to the n-1th reflection strip structure region on the substrate, forming a second color filter layer at a position corresponding to the nth reflection strip structure region, and forming a third color filter layer at a position corresponding to the n+1th reflection strip structure region, where n=m+2, m=3*(i-1), and i is a positive integer;

[0154] 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;

[0155] S300, forming a first ferromagnetic foil, a second ferromagnetic foil and a third ferromagnetic foil on the third phase retarder, the fourth phase retarder and the fifth phase retarder respectively;

[0156] 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;

[0157] S500, 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, so as to form a plurality of reflection strip structures arranged in parallel along a first direction, wherein the plurality of reflection strip structures are respectively located in a plurality of reflection strip structure regions;

[0158] S600, generating a magnetic field whose direction is perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip;

[0159] S700, fixing the formed reflective strip on the substrate by using photosensitive adhesive.

[0160] Among them, the thickness of the third phase delay plate and the thickness of the seventh phase delay plate correspond to the wavelength of the first color light, the thickness of the fourth phase delay plate and the thickness of the eighth phase delay plate correspond to the wavelength of the second color light, and the thickness of the fifth phase delay plate and the thickness of the sixth phase delay plate correspond to the wavelength of the third color light.

[0161] It should be noted that this preparation method is the same as the preparation method provided in the previous embodiment in that there is also a problem of distortion of the reflection strips. In order to avoid the problem of distortion of the reflection strips, in some embodiments, before generating a magnetic field whose direction is perpendicular to the substrate, the preparation method may also include: cutting the multiple reflection strip structures along the second direction to cut each reflection strip structure into multiple reflection strip structures arranged in sequence along the second direction.

[0162] In some embodiments, a ratio between a length of the reflective strip along the second direction and a length of the reflective strip along the 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.

[0163] In some embodiments, the number of phase retarders of the reflective strip is n e directions are respectively parallel to the second direction.

[0164] It should be noted that the principle and workflow of the method for preparing the reflective plate in the aerial imaging device provided in this embodiment are similar to the method for preparing the reflective plate in the aerial imaging device provided in the previous embodiment. The relevant parts can be referred to the above description and will not be repeated here.

[0165] It should be noted that, in addition to using the method for preparing a reflector plate in an aerial imaging device provided in this embodiment, the reflector plate in the aerial imaging device provided in this embodiment can also be prepared by improving the existing method for preparing a reflector plate in an aerial imaging device.

[0166] It should be noted that, for the aerial imaging device mentioned above, which includes a first reflector and a second reflector, both the first reflector and the second reflector can be prepared by the preparation method. When preparing the second reflector, except for the difference in direction description from the first reflector, other steps are the same.

[0167] In addition to the aforementioned imaging devices that use reflectors to achieve aerial imaging, Fig.19 As shown, another embodiment of the present application provides an aerial imaging device, comprising:

[0168] Display panel;

[0169] A first polarizing element and a second polarizing element are arranged on the cell;

[0170] A semi-transmissive and semi-reflective structure and a semi-transmissive and semi-reversible film are arranged between the first polarizing device and the second polarizing device;

[0171] A first quarter wave plate is arranged on the side close to the first polarizing element in the aerial imaging device, and a second quarter wave plate is arranged between the semi-transparent and semi-reflective structure and the semi-transparent and semi-reverse reflection film;

[0172] A microlens array for converting light emitted by pixels of the display panel into parallel light is arranged between the first polarizing device and the display panel, and the display panel is located on the focal plane of the microlens array;

[0173] The aerial imaging device is used to process the parallel polarized light emitted by the pixels of the display panel and passing through the microlens array and the first polarizer in sequence through the optical path inside the aerial imaging device, so that the polarized light passing through the second polarizer forms an aerial image in the space far away from the display panel.

[0174] It should be noted that the first polarizing device provided in this embodiment is used to absorb polarized light in a specified direction and allow polarized light in a direction perpendicular to the specified direction to pass through the first polarizing device;

[0175] The first polarizer is used to absorb polarized light in a specified direction and allow polarized light in a direction perpendicular to the specified direction to pass through the second polarizer. In this embodiment, the directions of the polarized light absorbed by the first polarizer and the second polarizer can be parallel or perpendicular, and are configured according to actual conditions. In addition, the first polarizer and the second polarizer can be polarizers or linear polarizers.

[0176] The first 1 / 4 wave plate and the second 1 / 4 wave plate are used to delay the polarized light passing through them by 45 degrees; that is, the two 1 / 4 wave plates can phase retard the deflected light, and the phase retardation of the polarized light passing through the 1 / 4 wave plates twice is equivalent to the phase retardation of the polarized light passing through the 1 / 2 wave plate once;

[0177] A semi-transmissive and semi-reflective structure, used for partially transmitting polarized light reaching the semi-transmissive and semi-reflective structure through the semi-transmissive and semi-reflective structure and partially reflecting the polarized light;

[0178] The semi-transmissive and semi-reversible film is used for partially transmitting the polarized light reaching the semi-transmissive and semi-reversible film through the semi-transmissive and semi-reversible film and partially reflecting it back along the original direction of the incident polarized light.

[0179] Fig. 20 The schematic diagram of the structure of the semi-transparent and semi-retroreflective film provided in this embodiment is shown. The semi-transparent and semi-retroreflective film comprises: a retroreflective layer with a microstructure, a semi-transparent and semi-reflective layer and a flat layer sequentially arranged on the retroreflective layer away from the light incident side.

[0180] The semi-transparent and semi-reflective layer can reflect a part of the incident light reaching the retroreflective layer back along the incident direction, and the light passing through the semi-transparent and semi-reflective layer can be emitted in the incident direction after passing through the flat layer. The semi-transparent and semi-reflective film uses the optical principle of the semi-transparent and semi-reflective layers to obtain a film with special optical effects, wherein the retroreflective layer with a microstructure is arranged at a position close to the incident light, and the flat layer is arranged at the position where the light emerges. Fig. 20 In the semi-transparent and semi-retroreflective film shown, the semi-transparent and semi-retroreflective layer is arranged on the light-emitting side of the entire retroreflective layer, and its optical principle is: when light at any angle is incident on the retroreflective layer of the semi-transparent and semi-retroreflective film, based on the microstructure of the retroreflective layer, part of the light can be reflected back along the original direction of the incident direction, and the other part of the light passes through the retroreflective layer to reach the semi-transparent and semi-reflective layer. Due to the refraction effect of the retroreflective layer, the direction of the light reaching the semi-transparent and semi-reflective layer is changed, that is, the direction of the light passing through the semi-transparent and semi-reflective layer is different from its incident direction. The setting of the flat layer can eliminate the change in the direction of the light caused by the refraction effect of the retroreflective layer, that is, after the light passes through the flat layer, it will be emitted in the original incident direction.

[0181] When the semi-transparent and semi-reflective film is manufactured, firstly, a retroreflective layer with a microstructure and a semi-transparent and semi-reflective layer on the side of the retroreflective layer away from the transparent substrate are formed on the transparent substrate; then, a flat layer is formed on the semi-transparent and semi-reflective layer.

[0182] It should be noted that the material used to form the retroreflective layer is a soft transparent material, that is, a flexible transparent film layer is first formed, and then the flexible transparent film layer is subjected to a printing and pressing process to print and press a prism structure on the flexible transparent film layer, that is, a retroreflective layer with a prism structure is formed. Fig.21 Subsequently, an extremely thin metal film layer, namely a semi-transmissive and semi-reflective layer, is formed on the prism structure of the retroreflective layer. For example, the metal film layer can be formed on the entire surface structure of the retroreflective layer by using a magnetron sputtering or evaporation process.

[0183] The microlens array is used to convert the light reaching the microlens array into parallel light for emission.

[0184] It should be noted that the present embodiment does not limit the specific positions of the semi-transparent and semi-reflective structures and the semi-transparent and semi-reversible reflective film. In one implementation of the present embodiment, the semi-transparent and semi-reversible reflective film is disposed on a side close to the second polarizer, and the semi-transparent and semi-reversible structure is disposed on a side close to the second 1 / 4 wavelength plate. Fig.19 In another implementation of the embodiment of the present invention, the semi-transmissive and semi-reversible film is arranged on a side close to the second 1 / 4 wavelength plate, and the semi-transmissive and semi-reflective structure is arranged on a side close to the second polarizer. Fig. 22 FIG. 1 is a schematic diagram of the structure of another aerial imaging device provided by an embodiment of the present invention. Fig. 22 Aerial imaging equipment and Fig.19 The difference between the aerial imaging devices shown is only that the positions of the semi-transparent and semi-reflective structures and the semi-transparent and semi-reversible membranes are swapped.

[0185] in addition, Fig.19 and Fig. 22 The aerial imaging device shown has the same effect on the light emitted by the display panel.

[0186] In a specific example, if Fig.23 As shown, Fig.19 The schematic diagram of an application scenario of the aerial imaging device shown is an aerial display of a two-dimensional picture, and the imaging device is controlled to be placed horizontally.

[0187] It is assumed that the first polarizer and the second polarizer can both pass polarized light in a first direction and absorb polarized light in a second direction. The first direction is, for example, a direction parallel to a side of the aerial imaging device, which is recorded as the polarization direction. Polarization direction Polarized light is hereinafter referred to as polarized light The second direction is parallel to the aerial imaging device and perpendicular to the first direction, and is recorded as the polarization direction. Polarization direction Polarized light is hereinafter referred to as polarized light The first direction and the second direction are both parallel to the aerial imaging device, and the two directions are perpendicular to each other. Fig.19 The optical path in the aerial imaging device during the aerial imaging process shown in the figure.

[0188] 1) The pixel light emitted by the display panel is converted into parallel light after passing through the microlens array;

[0189] 2) After the parallel light passes through the first polarizer, due to the polarized light Through, polarized light is absorbed, so the parallel light forms polarized light after passing through the first polarizer

[0190] 3), polarized light passes through After passing through the first quarter wave plate, it reaches the semi-transparent and semi-reflective structure;

[0191] 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 becomes polarized light after passing through two 1 / 4 wave plates. Reflected polarized light Finally, it is absorbed by the first polarizer;

[0192] The transmitted polarized light passes through the second quarter wave plate and reaches the semi-transparent and semi-reversal film. At this time, the polarized light becomes polarized light after passing through two quarter wave plates.

[0193] 5) Polarized light transmitted through a semi-transparent and semi-reversible film The polarized light absorbed by the second polarizer and reflected Return along the original route and reach the semi-transparent and semi-reflective structure again after passing through the second quarter wave plate;

[0194] 6), after passing through the semi-transparent and semi-reflective structure, the transmitted polarized light is lost in the chamber (it should be noted that the transmitted polarized light passes through the 1 / 4 wave plate again and becomes polarized light If no microlens array is set, polarized light After passing through the first polarizer, it directly irradiates the display panel, which will affect the image quality of the aerial image to a certain extent. Since a microlens array is set, the deflected light after passing through the first polarizer can be converged in the microlens array and returned to the light exit point of the display panel, thereby realizing display-level reverse reflection. The reflected polarized light passes through the second 1 / 4 wave plate again and reaches the semi-transparent and semi-reverse reflection film. At this time, the polarization becomes polarized light after passing through two 1 / 4 wave plates.

[0195] 7) Polarized light transmitted through a semi-transparent and semi-reversible film The reflected polarized light is emitted from the second polarizer and forms an image in the air on the light exiting side of the polarizer. Due to the continuous reflection between the semi-transparent and semi-reflective structure and the semi-transparent and semi-reversal film, the light intensity drops sharply and cannot be emitted, and no superimposed image can be produced.

[0196] for Fig. 20 In the aerial imaging device shown, the transmission mode of polarized light in the semi-transparent and semi-reflective structure and the semi-transparent and semi-reversible film, and the continuous reflection mode between the semi-transparent and semi-reversible structure and the semi-transparent and semi-reversible film are similar to the above description, so they are not repeated in this embodiment.

[0197] It should be noted that Fig.19 and Fig. 22 In the aerial imaging device shown, the polarization directions of the polarized light that can pass through the first polarizer and the second polarizer are the same, that is, the passing axes of the first polarizer and the second polarizer are arranged in parallel. Fig.19 and Fig. 22 In the aerial imaging device shown, the first polarizer and the second polarizer can only pass polarized light. And absorb polarized light It can also be set that the first polarizer and the second polarizer can both pass polarized light And absorb polarized light

[0198] The aerial imaging device provided in this embodiment can effectively perform aerial imaging on the picture displayed by the display panel, and has a good imaging effect. The aerial display device has a simple structure, is easy to implement, and has a small size, and can be a flat-panel structure.

[0199] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0200] It should also be noted that, in the description of the present application, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the statement "comprise one..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0201] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not limitations on the implementation methods of the present application. For ordinary technicians in this field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present application are still within the scope of protection of the present application.

Claims

1. A method for preparing a reflector in an aerial imaging device, characterized in that: include: Forming a first phase retarder, a ferromagnetic foil and a second phase retarder which are sequentially stacked on a substrate; Cutting the first phase delay plate, the ferromagnetic foil and the second phase delay plate to form a plurality of reflection strip structures arranged in parallel along a first direction; A magnetic field is generated with a direction perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip.

2. The method according to claim 1, characterized in that The cutting of the first phase delay plate, the ferromagnetic foil and the second phase delay plate to form a plurality of reflection strip structures arranged in parallel along the first direction comprises: cutting the first phase delay plate, the ferromagnetic foil and the second phase delay plate respectively along the first direction and the second direction to form a plurality of reflection strip structure groups arranged in parallel along the first direction, each reflection strip structure group respectively comprising a plurality of reflection strip structures arranged in sequence along the second direction, wherein the second direction is perpendicular to the first direction.

3. The method according to claim 2, characterized in that A ratio between a length of the reflective strip along the second direction and a length of the reflective strip along the 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 according to claim 1, characterized in that The first phase retarder of the reflective strip has a e direction and the second phase retardation plate n e The 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 method for preparing a reflector in an aerial imaging device, characterized in that: include: The substrate is divided into a plurality of reflection strip structure regions arranged in parallel along a first direction, and a first color filter layer is formed at a position corresponding to the n-1th reflection strip structure region on the substrate, a second color filter layer is formed at a position corresponding to the nth reflection strip structure region, and a third color filter layer is formed at a position corresponding to the n+1th reflection strip structure region, where n=m+2, m=3*(i-1), and i is a positive integer; 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; forming a first ferromagnetic foil, a second ferromagnetic foil and a third ferromagnetic foil on the third phase retarder, the fourth phase retarder and the fifth phase retarder respectively; 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; 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 reflection strip structures arranged in parallel along a first direction, wherein the plurality of reflection strip structures are respectively located in a plurality of reflection strip structure regions; generating a magnetic field with a magnetic field direction perpendicular to the substrate, so that the reflection strip structure stands upright to form a reflection strip; Among them, the thickness of the third phase delay plate and the thickness of the seventh phase delay plate correspond to the wavelength of the first color light, the thickness of the fourth phase delay plate and the thickness of the eighth phase delay plate correspond to the wavelength of the second color light, and the thickness of the fifth phase delay plate and the thickness of the sixth phase delay plate correspond to the wavelength of the third color light.

6. The method according to claim 5, characterized in that Before generating a magnetic field whose direction is perpendicular to the magnetic field of the substrate, the method further includes: cutting the multiple reflection strip structures along a second direction to cut each reflection strip structure into multiple reflection strip structures arranged in sequence along the second direction, wherein the second direction is perpendicular to the first direction.

7. The method according to claim 6, characterized in that A ratio between a length of the reflective strip along the second direction and a length of the reflective strip along the 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 according to claim 5, characterized in that The number of phase delay plates of the reflection strip is n e The 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. A reflector for an aerial imaging device, characterized in that: Prepared based on the method of any one of claims 5 to 8, the reflective plate comprises a substrate and a plurality of reflective strips formed on the substrate and arranged in parallel along a first direction; The first reflection surface of the n-1th reflection strip is provided with a sixth phase retarder, and the second reflection surface is provided with a third phase retarder, the sixth phase retarder is provided with a third color filter layer, and the third phase retarder is provided with a first color filter layer; The first reflection surface of the nth reflection strip is provided with a seventh phase retarder, and the second reflection surface is provided with a fourth phase retarder, 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; The first reflection surface of the n+1th reflection strip is provided with an eighth phase retarder, and the second reflection 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; Among them, 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=m+2, m=3*(i-1), i is a positive integer.

10. An aerial imaging device, characterized in that: It comprises a display panel, a reflective plate prepared by the preparation method according to any one of claims 1 to 4, a first polarizer and a second polarizer; The reflector is used to converge the light emitted by the display panel arranged on one side of the reflector to the other side of the reflector to form a corresponding image; The first polarizer is disposed between the display panel and the reflector, the second polarizer is disposed on a side of the reflector away from the display panel, and the light transmission axes of the first polarizer and the second polarizer are in different directions.

11. An aerial imaging device, characterized in that: It comprises a display panel, a reflective plate as claimed in claim 9, a first polarizer and a second polarizer; The reflector is used to converge the light emitted by the light-emitting entity arranged on one side of the reflector to the other side of the reflector to form a corresponding image; The first polarizer is arranged between the display panel and the reflector, the second polarizer is arranged on a side of the reflector away from the display panel, and the light transmission axis directions of the first polarizer and the second polarizer are different; The display panel includes a first color photon pixel, a second color photon pixel and a third color photon pixel, a projection of a spacing area between an n-1th reflection bar and an nth reflection bar on the display panel corresponds to the first color photon pixel, a projection of a spacing area between an nth reflection bar and an n+1th reflection bar on the display panel corresponds to the second color photon pixel, and a projection of a spacing area between an n+1th reflection bar and an n+2th reflection bar on the display panel corresponds to the third color photon pixel.

Images