Aerial imaging device

Abstract

The invention provides an aerial imaging device, and the device comprises a plurality of display modules which are used for emitting image light in at least two directions; the flat plate lens is arranged on the same side of the display modules and used for receiving the image light emitted by each display module and projecting and converging multiple beams of image light to form multiple real images in the air, and each real image and the corresponding display module are symmetrical about the flat plate lens; wherein the flat lens comprises an equivalent negative refractive index lens.

Description

Technical Field

[0001] This application relates to an aerial imaging device. Background Art

[0002] An aerial imaging device usually has a single display module corresponding to a single imaging element. The imaging element projects the light emitted by the display module into the air to form a real image. However, the viewing angle of a single real image in the air is limited, so the demand for viewing from different directions cannot be met. And setting multiple aerial imaging devices that project real images in different directions will cause the occupied space to increase exponentially. Summary of the Invention

[0003] On the one hand, this application provides an aerial imaging device, including:

[0004] A plurality of display modules for respectively emitting image light along at least two directions;

[0005] A flat lens disposed on the same side of the plurality of display modules, for receiving the image light emitted by each display module, and respectively projecting and converging the multiple beams of image light to form a plurality of real images in the air. Each real image is symmetric with the corresponding display module with respect to the flat lens;

[0006] Wherein, the flat lens includes an equivalent negative refractive index lens.

[0007] For the aerial imaging device provided by the embodiment of this application, by setting one flat lens corresponding to a plurality of display modules, the image light emitted by each display module can be respectively converged to form a real image in the air. By setting a plurality of display modules to emit image light along at least two directions, at least a plurality of real images facing at least two directions can be correspondingly formed, so as to realize multi-view aerial imaging through one flat lens. By setting the flat lens to include an equivalent negative refractive index lens, the image light emitted from the display module can directly pass through the equivalent negative refractive index lens and converge to form a real image on the other side of the flat lens, without the need to additionally set other optical elements, which is beneficial to improving the space utilization rate of the aerial imaging device.

[0008] In one embodiment, the flat lens includes a first optical waveguide array and a second optical waveguide array. The first optical waveguide array includes a plurality of optical waveguides arranged parallel to a first direction, and the second optical waveguide array includes a plurality of optical waveguides arranged parallel to a second direction. The first direction is perpendicular to the second direction.

[0009] In one embodiment, the flat lens further includes a first transparent window and a second transparent window. The first transparent window is disposed on the side of the first optical waveguide array away from the second optical waveguide array; the second transparent window is disposed on the side of the second optical waveguide array away from the first optical waveguide array.

[0010] In one embodiment, one or more combinations of an anti-reflection component, an anti-glare component, and a viewing angle control component are disposed on the surface of the flat lens.

[0011] In one embodiment, the angle between each of the image lights and the flat lens is 40° - 50°.

[0012] In one embodiment, the number of the display modules is two, and the two display modules emit the image lights in different directions respectively.

[0013] In one embodiment, the number of the display modules is four, the flat lens is of a quadrilateral structure, and the four display modules are respectively disposed corresponding to the four sides of the flat lens.

[0014] In one embodiment, the aerial imaging device further includes an interaction module, which is electrically connected to a plurality of the display modules, and is configured to sense an interaction behavior of a user and adjust display contents of the plurality of display modules according to the interaction behavior.

[0015] In one embodiment, the interaction module includes a sensing module and a controller. The sensing module is electrically connected to the controller. The sensing module is configured to sense the interaction behavior and generate an interaction signal. The controller is electrically connected to a plurality of the display modules, and is configured to receive and analyze the interaction signal and adjust display contents of the plurality of display modules.

[0016] In one embodiment, the sensing module includes at least one motion sensing component, and a sensing range of the motion sensing component covers one or more of the real images and is configured to sense the interaction behavior acting on the real images. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of an aerial imaging device in an embodiment of the present application.

[0018] Figure 2 It is a schematic structural diagram of a flat lens in an embodiment of the present application.

[0019] Figure 3 is Figure 2 an exploded structural diagram of the flat lens in

[0020] Figure 4 It is a front view structural diagram of a flat lens in an embodiment of the present application.

[0021] Figure 5 It is a partial structural diagram of an optical waveguide array in an embodiment of the present application.

[0022] Figure 6Schematic diagram of the optical path structure of the flat lens in an embodiment of the present application.

[0023] Figure 7 Schematic diagram of the planar optical path of the optical waveguide array in an embodiment of the present application.

[0024] Figure 8 Schematic diagram of the three-dimensional optical path of the optical waveguide array in an embodiment of the present application.

[0025] Figure 9 Schematic diagram of a partial optical path structure of the flat lens in an embodiment of the present application.

[0026] Figure 10 Schematic diagram of the electrical connection relationship of the aerial imaging device in an embodiment of the present application.

[0027] Figure 11 Schematic diagram of the interaction state of the aerial imaging device in an embodiment of the present application.

[0028] Description of main element symbols

[0029] Aerial imaging device 100

[0030] Flat lens 10

[0031] First transparent window 11

[0032] First optical waveguide array 13

[0033] Second optical waveguide array 15

[0034] Second transparent window 17

[0035] Optical waveguide 130

[0036] Reflection unit 131

[0037] Reflection film 133

[0038] Adhesive 140

[0039] Display module 30

[0040] Interaction module 50

[0041] Sensing module 51

[0042] Motion sensing component 511

[0043] Sound sensing component 513

[0044] Controller 53

[0045] Real image A

[0046] Image light L

[0047] Image source E

[0048] Virtual image E' in the air

[0049] Angles α, θ

[0050] Incident angles α1, α2, α3, γ1, γ2, γ3

[0051] Reflection angles β1, β2, β3, δ1, δ2, δ3

[0052] Distance D

[0053] First direction X

[0054] Second direction Y

[0055] Third direction Z

[0056] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. Specific embodiments

[0057] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application.

[0058] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0059] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined purpose, the following detailed description of the present application is made with reference to the drawings and preferred embodiments.

[0060] Please refer to Figure 1 , the aerial imaging device 100 provided in the embodiment of the present application includes: a flat lens 10 and a plurality of display modules 30. Among them, the plurality of display modules 30 are used to emit image light L in at least two directions respectively, and the flat lens 10 is disposed on the same side of the plurality of display modules 30, and is used to receive the image light L emitted by each display module 30, and project and converge the multiple beams of image light L respectively to form a plurality of virtual images A in the air, and each virtual image A is symmetric with the corresponding display module 30 with respect to the flat lens 10.

[0061] Specifically, the planar lens 10 is an equivalent negative refractive index lens, that is, the light incident on the planar lens 10 will exit along the direction symmetric to the planar lens 10. Therefore, the image light L diverging from any light-emitting point on a display module 30 is incident on the planar lens 10, and after exiting from the other side of the planar lens 10, it converges to form a real image point. This real image point is symmetric to the light-emitting point with respect to the planar lens 10. Each light-emitting point of the display module 30 converges to form a real image point on the other side of the planar lens 10, thereby forming a real image A in the air that is symmetric to the display module 30 with respect to the planar lens 10.

[0062] Please refer to Figure 2 and Figure 3 In this embodiment, the planar lens 10 includes a first transparent window 11, a first optical waveguide array 13, a second optical waveguide array 15, and a second transparent window 17 that are sequentially stacked. Among them, the first transparent window 11 and the second transparent window 17 are made of transparent materials and are respectively used to protect the first optical waveguide array 13 and the second optical waveguide array 15.

[0063] Specifically, the first optical waveguide array 13 includes a plurality of optical waveguides 130 arranged in sequence parallel to the first direction X, and the second optical waveguide array 15 includes a plurality of optical waveguides 130 arranged in sequence parallel to the second direction Y. The first direction X is perpendicular to the second direction Y, that is, the arrangement direction of the plurality of optical waveguides 130 in the first optical waveguide array 13 is perpendicular to the arrangement direction of the plurality of optical waveguides 130 in the second optical waveguide array 15. The first transparent window 11, the first optical waveguide array 13, the second optical waveguide array 15, and the second transparent window 17 are arranged in sequence in the third direction Z, and the thicknesses of the first optical waveguide array 13 and the second optical waveguide array 15 along the third direction Z are the same, which is convenient for design and production.

[0064] Both the first transparent window 11 and the second transparent window 17 have two optical surfaces, and both the first transparent window 11 and the second transparent window 17 have a transmittance of 90%-100% for light with a wavelength between 390 nm and 760 nm. The materials of the first transparent window 11 and the second transparent window 17 can be at least one of glass or polymers such as plastics and acrylic resins, and are used to protect the first optical waveguide array 13 or the second optical waveguide array 15 and filter out excess light. In other embodiments, if the strength is sufficient after the first optical waveguide array 13 and the second optical waveguide array 15 are closely orthogonally bonded, or there are thickness limitations in the installation environment, then only one transparent substrate can also be configured or no transparent substrate can be configured at all, and the present application does not limit this.

[0065] Please refer to Figure 3 and Figure 4, the first optical waveguide array 13 and the second optical waveguide array 15 are composed of a plurality of optical waveguides 130 with a rectangular cross-section. The lengths of the respective optical waveguides 130 are determined by the outer dimensions of the first optical waveguide array 13 and the second optical waveguide array 15. Therefore, the lengths of the multiple optical waveguides 130 in the first optical waveguide array 13 or the second optical waveguide array 15 are different. The multiple optical waveguides 130 in the first optical waveguide array 13 extend along the first direction X, and the multiple optical waveguides 130 in the second optical waveguide array 15 extend along the second direction Y. The extending directions of the optical waveguides 130 in the first optical waveguide array 13 and the second optical waveguide array 15 are perpendicular to each other. That is, when viewed from the third direction Z (the thickness direction of the flat lens 10), the first optical waveguide array 13 and the second optical waveguide array 15 are orthogonally arranged, so that two light beams in the orthogonal directions converge at a point, and it is ensured that the object plane and the image plane (the light source side and the imaging side) are symmetric with respect to the flat lens 10, generating an equivalent negative refraction phenomenon and realizing aerial imaging.

[0066] The first optical waveguide array 13 or the second optical waveguide array 15 is composed of a plurality of parallelly arranged optical waveguides 130 obliquely arranged at an angle of 30° - 60° with respect to the vertical direction in the user's perspective. Specifically, the first optical waveguide array 13 may be composed of a plurality of optical waveguides 130 with a cross-section of a rectangle and arranged side by side with an included angle θ of 30° - 60°. The included angle θ is the included angle between the optical waveguide 130 and the vertical direction in the user's perspective. The second optical waveguide array 15 may be composed of optical waveguides 130 perpendicular to the optical waveguides 130 in the first optical waveguide array 13 and arranged side by side with a cross-section of a rectangle. In other embodiments, the arrangement directions of the optical waveguides 130 in the two groups of optical waveguide arrays may be interchanged. For example, the optical waveguides 130 in the first optical waveguide array 13 extend along the second direction Y, and the optical waveguides 130 in the second optical waveguide array 15 extend along the first direction X. The present application does not limit this, as long as it satisfies that when viewed from the third direction Z (the thickness direction), the first optical waveguide array 13 and the second optical waveguide array 15 are orthogonally arranged, so that two light beams in the orthogonal directions converge at a point, and it is ensured that the object and image planes (the light source side and the imaging side) are symmetric with respect to the flat lens 10, generating an equivalent negative refraction phenomenon and realizing aerial imaging, all are within the scope of the present application. Among them, the optical waveguide 130 has an optical refractive index n1. In some embodiments, n1 > 1.4. For example, n1 takes values such as 1.5, 1.8, 2.0, etc.

[0067] Please refer to Figure 5, for the first optical waveguide array 13 and the second optical waveguide array 15, there are two interfaces between each optical waveguide 130 and its adjacent optical waveguide 130, and each interface is joined by an adhesive 140 with good light transmittance. The adhesive 140 can be a photosensitive adhesive or a thermosetting adhesive. The thickness of the adhesive 503 is greater than 0.001 mm, such as 0.002 mm or 0.003 mm or 0.0015 mm, and the specific thickness can be set according to specific requirements. Adhesives 140 (not shown in the figure) can be provided between the first transparent window 11, the first optical waveguide array 13, the second optical waveguide array 15, and the second transparent window 17 in the flat lens 10 to increase firmness.

[0068] The optical waveguide 130 includes a reflection unit 131 and a reflection film 133 disposed on one side or two sides of the reflection unit 131 along the arrangement direction of the plurality of optical waveguides 130. Specifically, in this embodiment, on both sides of each reflection unit 131 in the arrangement direction of the plurality of optical waveguides 130, a reflection film 133 is plated. The material of the reflection film 133 can be a metal material such as aluminum or silver that realizes total reflection or other non-metal compound materials. The function of the reflection film 133 is to prevent light from entering the adjacent optical waveguide array due to non-total reflection and forming stray light, which affects imaging. In other embodiments, the reflection film 133 can also be plated only on one side of the optical waveguide 130. Each reflection unit 131 can also add a dielectric film on the reflection film 133 to improve the light reflectivity.

[0069] The cross-sectional width of a single reflection unit 131 is 0.1 mm - 5 mm, and the cross-sectional length is 0.1 mm - 5 mm. To obtain a better imaging effect, the cross-sectional width can also be 0.1 mm - 2 mm, and the cross-sectional length can also be 0.1 mm - 2 mm. For example, the cross-sectional width is 0.2 mm and the cross-sectional length is 0.2 mm, or the cross-sectional width is 0.5 mm and the cross-sectional length is 0.5 mm. When used for large-screen display, large-size requirements can be achieved by splicing multiple optical waveguide arrays. The overall shapes of the first optical waveguide array 13 and the second optical waveguide array 15 are set according to the application scenario requirements. In this embodiment, the first optical waveguide array 13 and the second optical waveguide array 15 are generally rectangular in structure, and the reflection units 131 at the two diagonals are triangular, and the reflection units 131 in the middle are trapezoidal structures. The lengths of the single reflection units 131 are not equal. The reflection unit 131 located on the rectangular diagonal is the longest, and the reflection units 131 at both ends are the shortest.

[0070] The flat lens 10 may further include an anti-reflection component, an anti-reflection enhancement component, and a viewing angle control component (not shown in the figure). The anti-reflection component can reduce the interference of reflected light on the real image A. The anti-reflection enhancement component can improve the overall transmittance of the flat lens 10 and enhance the clarity and brightness of the real image A. The viewing angle control component can be used to eliminate the afterimage of the real image A, reduce the dizziness of the observer, and prevent the observer from peeping into the interior of the aerial imaging device 100 from other angles, thereby enhancing the overall aesthetic appearance of the aerial imaging device 100. Among them, the anti-reflection component, the anti-reflection enhancement component, and the viewing angle control component can be combined, or they can also be independently disposed between the first transparent window 11 and the first optical waveguide array 13, between the second transparent window 17 and the second optical waveguide array 15, between the first optical waveguide array 13 and the second optical waveguide array 15, on the side of the first transparent window 11 away from the first optical waveguide array 13, or on the side of the second transparent window 17 away from the second optical waveguide array 15.

[0071] The principle of the flat lens 10 for realizing aerial imaging is explained below. Please refer to Figure 6 , Figure 7 and Figure 8, on the micron scale, a mutually orthogonal double-layer waveguide array structure is used to orthogonally decompose any optical signal emitted by the image source E. The optical signal emitted by the image source E is projected onto the first optical waveguide array 13 along the third direction Z and diverges along the first direction X and the second direction Y. Taking the position where the image source E is located as the origin, the first direction X as the x-axis, and the second direction Y as the y-axis, a rectangular coordinate system is established for the light emitted by the image source E, and the light emitted by the image source E is decomposed into two mutually orthogonal beams of light that diverge along the x-axis and the y-axis respectively in this rectangular coordinate system. When the light emitted by the image source E is incident on the first optical waveguide array 13, the light that diverges along the y-axis is perpendicular to the multiple optical waveguides 130 on the first optical waveguide array 13. Therefore, it is sequentially incident into different optical waveguides 130, and after being incident on the reflection film 133, it is totally reflected out of the optical waveguide 130 by the reflection film 133 at the same reflection angle as the incident angle. The light that is sequentially reflected and emitted by the multiple optical waveguides 130 in the first optical waveguide array 13 is incident on the second optical waveguide array 15 and is parallel to the multiple optical waveguides 130 extending along the y-axis in the second optical waveguide array 15, directly passing through the second optical waveguide array 15 and finally converging to form a partial virtual image E' in the air. The light that diverges along the x-axis is parallel to the multiple optical waveguides 130 on the first optical waveguide array 13. Therefore, it directly passes through the first optical waveguide array 13 and is incident on the second optical waveguide array 15, and is sequentially reflected and emitted by the multiple optical waveguides 130 in the second optical waveguide array 15, and finally converges to form another partial virtual image E' in the air. That is to say, the light emitted from the image source E is decomposed into two beams of light that diverge along the first direction X and the second direction Y, respectively reflected by the first optical waveguide array 13 and the second optical waveguide array 15, and finally converge to form a virtual image E' in the air, and the virtual image E' is symmetric with the image source E with respect to the flat lens 10. Therefore, the light rays in any direction can achieve mirror symmetry after passing through the flat lens 10, and the divergent light of any light source will re-converge into a virtual image in the air at the symmetric position after passing through the flat lens 10. The imaging distance D of the virtual image E' is the same as the distance from the flat lens 10 to the image source E, which is an equal-distance imaging, and the position of the virtual image E' is in the air, without a specific carrier, but directly presenting a virtual image in the air. Therefore, the image seen by the user in the space is formed by the convergence of the light emitted by the image source E.

[0072] When the light emitted by the image source E passes through the flat lens 10, the above process occurs on the flat lens 10. Specifically, please refer to Figure 9 , the light emitted by the image source E is at Figure 10 The incident angles of the light emitted by the image source E on the three optical waveguides 130 in the first optical waveguide array 13 shown are α1, α2, and α3 respectively, and the corresponding reflection angles of the light emitted by the image source E on the three optical waveguides 130 shown are β1, β2, and β3, where α1 = β1, α2 = β2, α3 = β3. After being reflected by the first optical waveguide array 13, at Figure 10The incident angles on one of the optical waveguides 130 in the second optical waveguide array 15 are shown to be γ1, γ2 and γ3, respectively, and the corresponding reflection angles on the optical waveguide 130 are δ1, δ2 and δ3, respectively, where γ1 = δ1, γ2 = δ2, and γ3 = δ3.

[0073] Furthermore, the incident angles of the image source E on the n optical waveguides 130 on the first optical waveguide array 13 are α1, α2, α3 ... αn, respectively. The distance between the image source E and the flat lens 10 is D. Then, the imaging position of the aerial real image E' is also at a distance D from the flat lens 10, and the viewing angle of the aerial real image E' is twice max(α).

[0074] It is understandable that if the size of the flat lens 10 is small, the image can only be seen at a certain distance from the imaging side of the flat lens 10; and if the size of the flat lens 10 is increased, a larger imaging distance can be achieved, thereby increasing the field of view.

[0075] The first and second optical waveguide arrays 13 and 15 have the same thickness, which simplifies the structural complexity of the first and second optical waveguide arrays 13 and 15, reduces the manufacturing difficulty of the first and second optical waveguide arrays 13 and 15, improves the production efficiency of the first and second optical waveguide arrays 13 and 15, and reduces the production cost of the first and second optical waveguide arrays 13 and 15. It should be noted that the thickness consistency here is a relative range, not an absolute consistency. That is, to improve production efficiency, a certain thickness difference between the optical waveguide arrays is acceptable without affecting the quality of aerial imaging.

[0076] In other embodiments, the flat lens 10 can also have other structures. For example, the flat lens 10 includes only one layer of optical waveguide array (not shown), which includes a plurality of reflective units arranged in an array along the first direction X and the second direction Y. The reflective units are cubic columnar structures, and each reflective unit has four cylindrical surfaces coated with a reflective film. In other words, this single-layer optical waveguide array combines the first optical waveguide array 13 and the second optical waveguide array 15 into a single layer. The imaging principle is the same as that of a stacked structure of the first optical waveguide array 13 and the second optical waveguide array 15. This application is not limited to this.

[0077] See also Figure 10 In this embodiment, the included angle α between each display module 30 and the flat-panel lens 10 is 40°-50°. Specifically, the included angle α can be any angle within the range of 40°-50°, for example, 45°. The included angle α between multiple display modules 30 and the flat-panel lens 10 can be the same or different, and this application does not impose any limitation on this.

[0078] Please refer to Figure 1, in this embodiment, the aerial imaging device 100 includes four display modules 30. The flat lens 10 has a quadrilateral structure, and the four display modules 30 are respectively arranged corresponding to the four sides of the flat lens 10. Specifically, the four display modules 30 are respectively parallel to the four sides of the flat lens 10 and face the center position of the flat lens 10, so that the four real images A respectively face the directions of the four sides of the flat lens 10, enabling users around the flat lens 10 to see the real image A projected by the aerial imaging device 100. Since the flat lens 10 symmetrically emits the light incident from one side to the other side, and the light incident from different directions does not interfere with each other, by providing one flat lens 10, the image light L emitted by the four display modules 30 can be respectively converged into the real image A. In other embodiments, the position of each display module 30 can also be adjusted to adjust the position of the real image A.

[0079] In another embodiment, the aerial imaging device 100 may also only include two display modules 30, and the two display modules 30 emit the image light L along different directions. That is, the two display modules 30 are respectively arranged at different positions corresponding to the flat lens 10, so as to project real images A facing different directions on the other side of the flat lens 10. In other embodiments, the number of the display modules 30 can also be set according to specific requirements. For example, it includes three display modules 30 or five or more display modules 30. The present application does not limit this. As long as multiple real images A facing different directions can be projected by one flat lens 10, they are all within the scope of the present application.

[0080] The display module 30 can be a flat display device or a three-dimensional display device. Specifically, the display module 30 can be a two-dimensional display panel, such as a display panel using cathode ray tube (CRT) display technology, liquid crystal display (LCD) technology, light emitting diode (LED) display technology, organic light emitting diode (OLED) display technology, quantum dot light emitting diodes (QLED) display technology, plasma display panel (PDP) technology, micro light emitting diode (Micro LED) display technology, mini light emitting diode (Mini LED) display technology, digital light processing (DLP) display technology, etc. It can also be a true three-dimensional display panel using holographic three-dimensional imaging technology, static volume imaging technology, translational volume scanning technology, rotational volume scanning technology, etc. It can also be a pseudo-three-dimensional display panel using the binocular parallax principle of the human eye. This application does not limit this.

[0081] An antireflection film or a moth-eye film can also be coated on the light-emitting surface of the display module 30. Specifically, the antireflection film is used to increase the light transmittance, and the moth-eye film can improve the resolution and anti-interference ability of the display module 30.

[0082] Please continue to refer to Figure 10 , the aerial imaging device 100 further includes an interaction module 50. The interaction module 50 is electrically connected to multiple display modules 30 and is used to sense the interaction behavior of the user and to adjust the display content of the multiple display modules 30 according to the interaction behavior of the user. Specifically, the interaction module 50 includes a sensing module 51 and a controller 53. The sensing module 51 is electrically connected to the controller 53. The sensing module 51 is used to sense the interaction behavior of the user and generate an interaction signal. The controller 53 is electrically connected to multiple display modules 30 and is used to receive and analyze the interaction signal, so as to adjust the display content of the multiple display modules 30.

[0083] In this embodiment, the sensing module 51 is configured to sense the interaction behavior acting on each real image A and transmit the interaction signal to the controller 53. The controller 53 is configured to adjust the content displayed by each display module 30 simultaneously or separately according to the interaction signal, thereby completing the interaction process with the user. In other embodiments, according to specific usage requirements, the sensing module 51 may also be set to only sense the interaction behavior acting on one or several of the real images A, and adjust the display content of multiple display modules 30 accordingly. The present application does not limit the specific control methods of the sensing module 51 and the controller 53.

[0084] In this embodiment, the sensing module 51 includes a motion sensing component 511 and a sound sensing component 513. The sensing range of the motion sensing component 511 covers the real image A and is configured to sense the interaction behavior acting on the real image A. The sound sensing component 513 is configured to receive the sound signal emitted by the user, thereby generating an interaction signal. Specifically, the motion sensing component 511 is configured to sense the position of the user's gesture or touch on the real image A, thereby determining the user's interaction behavior. The motion sensing component 511 may be one or a combination of several of the following: a far-infrared sensing device, an ultrasonic sensing device, a laser interferometric sensing device, a grating sensing device, an optical fiber sensing device, or a charge-coupled device sensing device, etc. The present application does not limit this. In other embodiments, according to specific usage requirements, the sensing module 51 may further include other components, such as physical control buttons, etc.

[0085] Please refer to Figure 11 , in this embodiment, the number of the motion sensing components 511 is four, and each motion sensing component 511 is respectively arranged corresponding to one real image A, so that each real image A is at least within the range of one motion sensing component 511. In other embodiments, according to specific usage situations, only one motion sensing component 511 may also be set, and one motion sensing component 511 completely covers all the real images A, or two motion sensing components 511 may be set, and each motion sensing component 511 respectively covers two real images A, etc. The present application does not limit the specific number of the motion sensing components 511, as long as it can sense the interaction behavior acting on the real image A, it is within the scope of the present application.

[0086] In this embodiment, the aerial imaging device 100 may further include a power supply module (not shown in the figure), and the power supply module is configured to supply power to the display module 30 and the sensing module 50.

[0087] The aerial imaging device 100 provided by the embodiment of the present application can enable a plurality of display modules 30 to respectively project real images A in different directions through the flat lens 10 by setting one flat lens 10 corresponding to a plurality of display modules 30, thereby expanding the visual range of the aerial imaging device 100 and improving the space utilization rate at the same time. By setting the flat lens 10 to include an equivalent negative refractive index lens, the image light L emitted by the display module 30 can be directly converged into an image without other optical elements, which is beneficial to setting a plurality of display modules 30 and further improving the space utilization rate.

[0088] Those of ordinary skill in the art of the present technology should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as appropriate changes and variations are made to the above embodiments within the scope of the spirit of the present application, they fall within the scope of protection required by the present application.

Claims

1. An aerial imaging device, characterized in that, Comprising: A plurality of display modules for emitting image light in at least two directions respectively; A flat lens disposed on the same side of the plurality of display modules, for receiving the image light emitted by each of the display modules, and respectively projecting and converging the multiple beams of image light to form a plurality of real images in the air, each real image being symmetric with the corresponding display module with respect to the flat lens; Wherein, the flat lens includes an equivalent negative refractive index lens.

2. The aerial imaging device according to claim 1, wherein The flat lens includes a first optical waveguide array and a second optical waveguide array. The first optical waveguide array includes a plurality of optical waveguides arranged parallel to a first direction, and the second optical waveguide array includes a plurality of optical waveguides arranged parallel to a second direction, the first direction being perpendicular to the second direction.

3. The aerial imaging device according to claim 2, characterized in that, The flat lens further includes a first transparent window and a second transparent window. The first transparent window is disposed on the side of the first optical waveguide array away from the second optical waveguide array; the second transparent window is disposed on the side of the second optical waveguide array away from the first optical waveguide array.

4. The aerial imaging device according to claim 1, wherein: The flat lens further includes one or more combinations of an anti-reflection component, an anti-reflection enhancement component, and a viewing angle control component.

5. The aerial imaging device according to claim 1, characterized in that The included angle between each display module and the flat lens is 40° - 50°.

6. The aerial imaging device according to claim 1, wherein The number of the display modules is two, and the two display modules emit the image light in different directions respectively.

7. The aerial imaging device according to claim 1, characterized in that, The number of the display modules is four, the flat lens is of a quadrilateral structure, and the four display modules are respectively disposed corresponding to the four sides of the flat lens.

8. The aerial imaging device according to claim 1, wherein: The air imaging device further includes an interaction module electrically connected to the plurality of display modules, for sensing the interaction behavior of the user, and for adjusting the display content of the plurality of display modules according to the interaction behavior.

9. The aerial imaging device according to claim 8, wherein, The interaction module includes a sensing module and a controller. The sensing module is electrically connected to the controller by an electrical signal. The sensing module is used for sensing the interaction behavior and generating an interaction signal. The controller is electrically connected to the plurality of display modules, for receiving and analyzing the interaction signal, and for adjusting the display content of the plurality of display modules.

10. The aerial imaging device according to claim 9, wherein The sensing module includes at least one motion sensing component, and the sensing range of the motion sensing component covers one or more of the real images, for sensing the interaction behavior acting on the real images.

Images