An aerial imaging system, a vehicle, and a human-machine interaction system based on aerial imaging

Abstract

The application provides an aerial imaging system, which comprises a display and an imaging module. The display is used for emitting image light. The imaging module is located on the light path of the image light, is used for converging the image light, and is used for projecting the converged image light into the air. The imaging module comprises a concave mirror and a half-transmissive half-reflective mirror. The concave mirror has a light-receiving surface, which is used for receiving and reflecting the image light. The half-transmissive half-reflective mirror is used for reflecting the image light emitted by the display to the light-receiving surface to be reflected by the light-receiving surface, and is used for transmitting the image light reflected by the light-receiving surface. The included angle between the half-transmissive half-reflective mirror and the optical axis of the concave mirror is not equal to 45°. In the aerial imaging system, only the floating real image formed in the aerial imaging system enters the vision of an observer, and the floating real image is clearly imaged. The application further provides an automobile and a human-computer interaction system based on aerial imaging.

Description

Technical Field

[0001] This application relates to the field of aerial imaging, and more particularly to an aerial imaging system, an automobile, and a human-computer interaction system based on aerial imaging. Background Technology

[0002] Aerial imaging systems do not require a carrier and can directly project real images into the air for human observation. Currently, the most common aerial imaging technologies on the market are as follows: (1) Using light to converge and image by reflecting light once in two mutually orthogonal optical waveguide arrays, the resulting floating real image has the advantage of no distortion, but there will be obvious afterimages on the left and right sides of the floating real image. At the same time, the resolution of the floating real image is low due to the limitation of the width of the optical waveguide array unit; (2) Using microlens array imaging, the display device can be placed parallel to the microlens array, greatly reducing the volume of the entire imaging system. However, the field of view of microlens array imaging is small, and the crosstalk between adjacent sub-lenses is more serious, affecting the viewing experience; (3) Using retroreflectors imaging, using microstructures such as spheres to make the reflected light parallel to the incident light and opposite in direction, and then converge to image. Although this imaging technology has a very low cost, the light energy loss is extremely high, the clarity is poor, and the imaging brightness is extremely low. Summary of the Invention

[0003] In view of the above situation, it is necessary to provide an aerial imaging system, a car, and an aerial imaging-based human-computer interaction system to solve the technical problems of extremely high light energy loss, poor clarity, and extremely low imaging brightness.

[0004] This application provides an aerial imaging system, including:

[0005] A display used to emit light for images; and

[0006] An imaging module, located in the optical path of the image light, is used to converge the image light and project the converged image light into the air to present a floating real image;

[0007] The imaging module includes:

[0008] A concave mirror has a light-receiving surface, which is used to receive and reflect the image light;

[0009] A semi-transparent mirror, disposed on one side of the concave mirror, is used to reflect the image light emitted from the display to the light-receiving surface for reflection by the light-receiving surface, and to transmit the image light reflected by the light-receiving surface. The angle between the optical axis of the semi-transparent mirror and the optical axis of the concave mirror is not equal to 45°. The sum of the distance between the geometric center of the concave mirror and the semi-transparent mirror and the distance between the display and the semi-transparent mirror is greater than the focal length of the concave mirror.

[0010] This application embodiment also provides an automobile, including: a vehicle body;

[0011] As described above, the aerial imaging system is installed inside the vehicle body. The floating image displayed by the aerial imaging system can be suspended at the target position inside the vehicle body so that it can be observed and operated by the driver inside the vehicle body.

[0012] This application also provides a human-computer interaction system based on aerial imaging, including:

[0013] The aerial imaging system described above is used to project floating real images;

[0014] A sensor for sensing touch or gestures directed at the floating image, and generating a sensing signal based on the touch or gesture; and

[0015] A controller, connected to the sensor and the display, is used to receive the sensing signal and to control the display to display an image corresponding to the touch or gesture based on the sensing signal.

[0016] The aforementioned aerial imaging system and the human-computer interaction system based on aerial imaging, because the angle between the optical axis of the semi-transparent mirror and the concave mirror is not equal to 45°, can make the real image of the external scene and the floating real image formed by the aerial imaging system located on opposite sides of the optical axis of the concave mirror. Thus, only the floating real image formed by the aerial imaging system enters the observer's vision. The floating real image is clear and has high resolution, which improves the user's viewing experience, and the light energy loss is extremely low. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the aerial imaging system according to Embodiment 1 of this application.

[0018] Figure 2 This is another structural schematic diagram of the aerial imaging system according to Embodiment 1 of this application.

[0019] Figure 3 This is a schematic diagram of the aerial imaging system according to Embodiment 2 of this application.

[0020] Figure 4 This is a schematic diagram of the aerial imaging system according to Embodiment 3 of this application.

[0021] Figure 5 This is another structural schematic diagram of the aerial imaging system of Embodiment 3 of this application.

[0022] Figure 6 This is a schematic diagram of the aerial imaging system according to Embodiment 4 of this application.

[0023] Figure 7 This is a schematic diagram of the aerial imaging system according to Embodiment 5 of this application.

[0024] Figure 8 This is another structural schematic diagram of the aerial imaging system of Embodiment 5 of this application.

[0025] Figure 9 This is a schematic diagram of the structure of the human-computer interaction system based on aerial imaging according to Embodiment Six of this application.

[0026] Explanation of main component symbols

[0027] Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the various embodiments of the present invention, for ease of description and not limitation of the invention, the term "connection" used in the present invention patent application specification and claims is not limited to physical or mechanical connections, whether direct or indirect. "Above," "below," "below," "left," "right," etc., are used only to indicate relative positional relationships, and when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] This application provides an aerial imaging system, including:

[0032] A display used to emit light for images; and

[0033] An imaging module, located in the optical path of the image light, is used to converge the image light and project the converged image light into the air to present a floating real image;

[0034] The imaging module includes:

[0035] A concave mirror has a light-receiving surface, which is used to receive and reflect the image light;

[0036] A semi-transparent mirror, disposed on one side of the concave mirror, is used to reflect the image light emitted from the display to the light-receiving surface for reflection by the light-receiving surface, and to transmit the image light reflected by the light-receiving surface. The angle between the optical axis of the semi-transparent mirror and the optical axis of the concave mirror is not equal to 45°. The sum of the distance between the geometric center of the concave mirror and the geometric center of the semi-transparent mirror and the distance between the geometric center of the display and the geometric center of the semi-transparent mirror is greater than the focal length of the concave mirror.

[0037] This application embodiment also provides an automobile, including: a vehicle body;

[0038] As described above, the aerial imaging system is installed inside the vehicle body. The floating image displayed by the aerial imaging system can be suspended at the target position inside the vehicle body so that it can be observed and operated by the driver inside the vehicle body.

[0039] This application also provides a human-computer interaction system based on aerial imaging, including:

[0040] The aerial imaging system described above is used to project floating real images;

[0041] A sensor for sensing touch or gestures directed at the floating image, and generating a sensing signal based on the touch or gesture; and

[0042] A controller, connected to the sensor and the display, is used to receive the sensing signal and to control the display to display an image corresponding to the touch or gesture based on the sensing signal.

[0043] The aforementioned aerial imaging system and the human-computer interaction system based on aerial imaging, because the angle between the optical axis of the semi-transparent mirror and the concave mirror is not equal to 45°, enable the real image of the external scene and the floating real image formed in the aerial imaging system to be located on opposite sides of the optical axis of the concave mirror. As a result, only the floating real image formed in the aerial imaging system enters the observer's vision, and the floating real image is clear and has high resolution, thus improving the user's viewing experience.

[0044] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0045] Example 1

[0046] Please see Figure 1 In Embodiment 1 of this application, an aerial imaging system 10 is proposed. The aerial imaging system 10 can project image light L1 into space to present a suspended floating real image 111 in the air, which can be observed by the human eye.

[0047] The aerial imaging system 10 includes a display 11 and an imaging module 12. The display 11 is used to emit image light L1. The imaging module 12 is located in the optical path of the image light L1 and is used to converge the image light L1 and project the converged image light L1 into the air to present a floating real image 111.

[0048] Display 11 can be a flat panel display, such as a liquid crystal display (LCD) or an organic light-emitting diode (OLED). When display 11 is a flat panel display, the floating image 111 presented by the aerial imaging system 10 is a two-dimensional planar image. Display 11 can also be a three-dimensional display, such as a true 3D display achieved using holographic 3D imaging technology, static volumetric imaging technology, translational volumetric scanning technology, or rotational volumetric scanning technology. Alternatively, it can be a pseudo-3D display achieved by using the principle of binocular parallax of the human eye and incorporating a barrier, lenticular lens, or directional backlight. When display 11 is a three-dimensional display, the floating image 111 presented by the aerial imaging system 10 is a three-dimensional stereoscopic image. Display 11 can also be an equivalent light source formed by multiple reflections, or a physical light source used for imaging with the concave mirror 123.

[0049] The imaging module 12 includes a concave mirror 123 and a semi-transparent mirror 124.

[0050] The concave mirror 123 is used to receive and focus the image light L1 and reflect the focused image light L1. The concave mirror 123 is made by depositing metal films such as gold, silver, and aluminum on a concave polished glass substrate through magnetron sputtering, vacuum evaporation, etc.

[0051] The concave mirror 123 includes a light-receiving surface S1, which is used to receive and reflect image light. The light-receiving surface S1 can be a sphere, a parabola, or a freeform surface, used to receive, focus, and reflect image light L1. When the light-receiving surface S1 is spherical, the floating real image 111 will be distorted. By increasing the focal length of the concave mirror 123, the distortion can be reduced to an effect imperceptible to the human eye. When the light-receiving surface S1 of the concave mirror 123 is parabolic, the imaging distortion of the light-receiving surface S1 is smaller than when the light-receiving surface S1 is spherical, but when the light-receiving surface S1 is spherical, it is beneficial to reduce the manufacturing cost of the concave mirror 123.

[0052] The semi-transparent mirror 124 is located in the optical path of the image light L1. It is used to receive the image light L1 emitted from the display 11 and reflect the image light L1 emitted from the display 11 to the light-receiving surface S1. It is also used to receive the image light L1 reflected from the reflective surface S1 and transmit the image light L1 reflected from the reflective surface S1. That is, the semi-transparent mirror 124 is used to adjust the angle at which the image light L1 emitted from the display 11 is incident on the light-receiving surface S1.

[0053] The semi-transparent mirror 124 and the concave mirror 123 form a certain angle with the optical axis L2. Different angles result in different positions of the real image formed by the display 11 in the air. The concave mirror 123 has an optical axis L2, and the angle between the semi-transparent mirror 124 and the concave mirror 123 is β1, where 0° < β1 < 45° and 45° < β1 < 90°. In this embodiment, the angle between the semi-transparent mirror 124 and the concave mirror 123 is preferably β2, where β2 is 45° < β1 ≤ 50°. Thus, the position of the display 11 in the air is above the optical axis L2 of the concave mirror 123. When a person looks directly at the floating real image 111 projected by the concave mirror 123, the real image of the person formed by the concave mirror 123 is below the optical axis L2 of the concave mirror 123. That is, the person's real image and the floating real image 111 formed in the air imaging system 10 are located on opposite sides of the optical axis L2 of the concave mirror 123. Through this optical path structure, the floating real image 111 formed by the display 11 and the person's own image can be distinguished. In this embodiment, the optical axis of the concave mirror 123 is parallel to the horizontal direction, which is... Figure 1 The direction of extension of the optical axis of the concave mirror 123. In some embodiments, the concave mirror 123, the display 11 and the semi-transparent mirror 124 can be rotated clockwise by 1°-5° so that the floating real image is located on the optical axis L2 of the concave mirror 123 before rotation, so that people can observe it better. The angle between the optical axis of the semi-transparent mirror 124 after rotation and the horizontal direction is 1°-5°.

[0054] Please see Figure 2 The light-receiving surface S1 has a geometric center C1, the semi-transparent and semi-reflective mirror 124 has a geometric center C2, and the display 11 has a geometric center C3.

[0055] The geometric center C2 is located on the optical axis L2 of the concave mirror 123. The geometric center C3 of the display 11 is connected to the geometric center C2 of the semi-transparent mirror 124 to form a first connecting line l1, which is perpendicular to the optical axis L2 of the concave mirror 123. The geometric center C1 of the concave mirror 123 and the geometric center C2 of the semi-transparent mirror 124 are connected to form a second connecting line l2.

[0056] When the sum of the second line l2 and the first line l1 is between one and two focal lengths f of the concave mirror 123, the size of the floating real image 111 is inverted and magnified relative to the size of the displayed image on the display 111. When the sum of the second line l2 and the first line l1 is twice the focal length of the concave mirror 123, the size of the floating real image 111 is equal to the size of the displayed image on the display 11. When the sum of the second line l2 and the first line l1 is greater than twice the focal length of the concave mirror 123, the size of the floating real image 111 is inverted and reduced relative to the size of the displayed image on the display 11. In this embodiment, it is preferable that the sum of the second line l2 and the first line l1 is greater than twice the focal length of the concave mirror 123.

[0057] To reduce stray light entering the aerial imaging system 10 and decrease the brightness of the real image formed by the external scene, the aerial imaging system 10 also includes a light-shielding member 13. The light-shielding member 13 is located on the side of the semi-transparent mirror 124 away from the concave mirror 123, and is located between the optical axis L2 of the concave mirror 123 and the display 11. Specifically, the light-shielding member 13 is located on the mirrored optical path, which is the optical path of the image light emitted from the geometric center of the display 11 to the semi-transparent mirror 124 about the mirror image of the semi-transparent mirror 124. It is used to block stray light entering from the outside, so that the image formed by the light-shielding member 13, after being projected by the imaging module 12, is located at the floating real image 111 on the optical axis L2. The image formed by the light-shielding member 13 is a light-shielding real image 131, located on the side of the floating real image 111 facing away from the semi-transparent mirror 124. This improves the contrast of the floating real image 111 formed by the display 11. In this embodiment, the light-shielding member 13 is a black baffle.

[0058] In the aforementioned aerial imaging system 10, since the angle between the semi-transparent mirror 124 and the concave mirror 123 on the optical axis L2 is greater than 45°, the real image of the external scene and the floating real image 111 formed in the aerial imaging system 10 are located on opposite sides of the optical axis L2 of the concave mirror 123. As a result, only the floating real image 111 formed in the aerial imaging system 10 enters the observer's vision, and the floating real image 111 is clear and has high resolution. Furthermore, it reduces the amount of stray light entering the aerial imaging system 10 and reduces the brightness of the real image formed by the external scene, thereby improving the user's viewing experience.

[0059] Example 2

[0060] Please see Figure 3 Embodiment 2 of this application proposes an aerial imaging system 20, the main difference from Embodiment 1 being:

[0061] In the aerial imaging system 20, the angle between the optical axes of the semi-transparent mirror 124 and the concave mirror 123 is preferably β3, where β3 is 40°≤β3<45°. Thus, the position of the display 11 in the air is below the optical axis L2 of the concave mirror 123. When a person looks directly at the floating real image 111 projected by the concave mirror 123, the real image of the person formed by the concave mirror 123 is above the optical axis L2 of the concave mirror 123. That is, the person's real image and the floating real image 111 formed in the aerial imaging system 10 are located on opposite sides of the optical axis L2 of the concave mirror 123. Through this optical path structure, the floating real image 111 formed by the display 11 and the person's own image can be distinguished. In this embodiment, the concave mirror 123, the display 11, and the semi-transparent mirror 124 can be rotated counterclockwise by 1°-5° so that the floating real image is located on the optical axis L2 of the concave mirror 123 before rotation, so that people can observe it better. The angle between the optical axis of the semi-transparent mirror 124 after rotation and the horizontal direction is -5° to -1°.

[0062] In the aerial imaging system 20, a light-shielding member 13 is disposed on the side of the semi-transparent mirror 124 away from the concave mirror 123, and on the side of the optical axis L2 of the concave mirror 123 away from the display 11. Specifically, the light-shielding member 13 is located on the mirrored optical path, which is the optical path of the image light emitted from the geometric center of the display 11 to the semi-transparent mirror 124 about the mirrored optical path of the semi-transparent mirror 124. It is used to block stray light entering from the outside, so that the image formed by the light-shielding member 13 is a light-shielding real image 131 projected by the imaging module 12 on the optical axis L2. The light-shielding real image 131 is located on the side of the floating real image 111 away from the semi-transparent mirror 124, thereby improving the contrast of the floating real image 111 formed by the display 11.

[0063] In the aerial imaging system 20, the imaging module 12 and the display 11 are rotated counterclockwise by a preset angle relative to the ground or the aerial imaging system 10 in Embodiment 1, so that the human eye can look directly at the position of the floating real image 111 formed by the display 11 in the air. In this embodiment, the preset angle is preferably 1°-5°.

[0064] The aerial imaging system 20 described above can achieve all the beneficial effects described in Embodiment 1, and the human eye can directly view the position of the floating real image 111 formed by the display 11 in the air, thus improving the user's viewing experience.

[0065] Example 3

[0066] Please see Figure 4 Embodiment 3 of this application proposes an aerial imaging system 30, the main difference from Embodiment 1 being:

[0067] The aerial imaging system 30 also includes a first reflector 122. Hereinafter, the first reflector 122 includes a left reflector 1221 and a right reflector 1222. As an example, the right reflector 1222 is located in the optical path of the image light L1, and the left reflector 1221 is located to the left of the right reflector 1222. The right reflector 1222 receives the image light L1 emitted by the display 11 and reflects it to the left reflector 1221. The left reflector 1221 receives the image light L1 reflected by the right reflector 1222 and reflects it to the semi-transparent mirror 124. The left and right reflectors 1221 and 1222 cooperate to change the optical path of the image light L1. Both the left and right reflectors 1221 and 1222 are metal-coated or dielectric-coated reflectors. When the left and right reflectors 1221 and 1222 are aluminum-coated reflectors, it is advantageous for cost savings.

[0068] The left reflector 1221 and the right reflector 1222 can be positioned in different locations, for example... Figure 4 In the aerial imaging system 30 shown, the left reflector 1221 and the right reflector 1222 are located between the display 11 and the semi-transparent mirror 124, and are used to reflect the image light L1 emitted from the display 11 to the semi-transparent mirror 124. Or, for example... Figure 5 In the aerial imaging system 30 shown, the left reflector 1221 and the right reflector 1222 are located between the semi-transparent and semi-reflective mirror 124 and the floating real image 111, and are used to reflect the image light L1 transmitted by the semi-transparent and semi-reflective mirror 124 to the target position to display the floating real image 111.

[0069] Please see Figure 1 When the first reflecting mirror 122 is not included in the aerial imaging system, in order to display the floating real image 111, the aerial imaging system 30 is positioned in the horizontal direction (within the first reflecting mirror 122). Figure 1 (based on the horizontal direction) and vertical direction (based on the horizontal direction) Figure 1 The dimension in the vertical direction (based on the reference) is relatively large. However, in this embodiment, the dimension in the vertical direction is larger. Figure 4 For example, through the reflection of the first reflecting mirror 122 between the display 11 and the semi-transparent mirror 124, the light path of the image light L1 between the display 11 and the semi-transparent mirror 124 is changed, in the vertical direction (with... Figure 1 The distance between the display 11 and the transflective mirror 124 was reduced (based on the vertical direction), thus reducing the vertical size of the aerial imaging system 30. Figure 5 For example, through the reflection effect of the first reflecting mirror 122 between the semi-transparent mirror 124 and the floating real image 111, the optical path of the image light L1 between the semi-transparent mirror 124 and the floating real image 111 is changed, in the horizontal direction (with Figure 1The distance between the semi-transparent mirror 124 and the floating real image 111 was reduced (based on the horizontal direction), which also reduced the size of the aerial imaging system 30 in the horizontal direction.

[0070] The aerial imaging system 30 of this embodiment can achieve the beneficial effects described in Embodiment 1. Furthermore, the aerial imaging system 30 in this embodiment changes the optical path of the image light L1 through the reflection of the first reflecting mirror 122, which helps to reduce the size of a certain dimension of the aerial imaging system 30, thereby reducing the overall volume of the aerial imaging system 30.

[0071] Example 4

[0072] Please see Figure 6 This embodiment proposes an aerial imaging system 40, which differs from Embodiment 2 in that:

[0073] In the aerial imaging system 40, the imaging module 12 also includes a second reflector 125. The second reflector 125 is located on the side of the light-shielding member 13 away from the concave mirror 123. It is used to reflect the image formed by the light-shielding member 13 to the imaging module 12, so that the image formed by the light-shielding member 13 is located at the floating real image 111 on the optical axis L2 after being projected by the imaging module 12. The image formed by the light-shielding member 13 is the light-shielding real image 131. The light-shielding real image 131 is located on the side of the floating real image 111 away from the semi-transparent and semi-reflective mirror 124. In this way, the contrast of the floating real image 111 formed by the display 11 can be improved.

[0074] The aerial imaging system 40 of this embodiment can achieve the beneficial effects described in Embodiment 2. Furthermore, in the aerial imaging system 30 of this embodiment, the installation position of the light-shielding component 13 is unrestricted, making installation convenient.

[0075] Example 5

[0076] Please see Figure 7 This embodiment proposes an aerial imaging system 50, which differs from Embodiment 1 in that:

[0077] In the aerial imaging system 50, the imaging module 12 also includes a second reflector 125. The second reflector 125 is located on the side of the light-shielding member 13 away from the concave mirror 123. It is used to reflect the image formed by the light-shielding member 13 to the imaging module 12, so that the image formed by the light-shielding member 13 is located at the floating real image 111 on the optical axis L2 after being projected by the imaging module 12. The image formed by the light-shielding member 13 is a light-shielding real image 131. The light-shielding real image 131 is located on the side of the floating real image 111 away from the semi-transparent and semi-reflective mirror 124. In this way, the contrast of the floating real image 111 formed by the display 11 can be improved.

[0078] Please see Figure 8 ,by Figure 7Taking the aerial imaging system 50 as an example, when the aerial imaging system 50 is applied to a car's head-up display scenario, that is, when the aerial imaging system 50 is installed inside the car body, the floating real image 111 displayed by the aerial imaging system 50 is suspended in the space inside the car body at the target position, which can be observed and operated (touch or gesture) by the driver inside the car. In the above scenario, the car windshield 200 has a coated area 210, which is coated with an anti-reflective film. The image light L1 reflected from the concave mirror 123 is incident on the coated area 210 and reflected by the coated area 210 to the target position to display the floating real image 111.

[0079] The aerial imaging system 50 of this embodiment can achieve all the beneficial effects described in Embodiment 1. Furthermore, in this embodiment, the installation position of the light-shielding component 13 in the aerial imaging system 30 is unrestricted, making installation convenient.

[0080] Example 6

[0081] Please see Figure 9 Embodiment Six of this application proposes a human-computer interaction system 100 based on aerial imaging, including any of the aerial imaging systems described above. Taking the aerial imaging system 10 in Embodiment One as an example, the human-computer interaction system 100 further includes a sensor 80 and a controller 90. The controller 90 is connected to the sensor 80 and the display 11 in the aerial imaging system, respectively.

[0082] Sensor 80 is used to sense touch or gestures directed at the floating real image 111 and generate sensing signals based on the touch or gestures. Controller 90 is used to receive the sensing signals and control display 11 to display an image corresponding to the touch or gesture based on the sensing signals.

[0083] Sensor 80 is an optical sensor, including but not limited to near-infrared, ultrasonic, laser interferometry, grating, encoder, fiber optic, or charge-coupled device. The optimal sensor type can be selected based on installation space, viewing angle, and usage environment, allowing users to view or operate the floating image 111 from the best possible position, improving the sensitivity and convenience of user operation. Controller 90 can be a control chip, control chipset, or computer host, etc. Controller 90 and sensor 80 can be connected via wired or wireless means to transmit digital or analog signals (i.e., the sensing signal is digital or analog), thereby allowing flexible control over the size of the human-machine interface system 100.

[0084] When the levitated image 111 is projected into the air, the user's hand can perform corresponding operations on the levitated image, such as touch or gesture. The sensor 80 has a sensing area 810, which is located on the same plane as the levitated image 111 or includes the three-dimensional space where the levitated image 111 is located. When the user touches the levitated image 111, the sensor 80 can sense the touch position and feed it back to the controller 90. The controller 90 controls the display 11 to display the corresponding image based on the touch position. When the user makes a gesture (e.g., drawing a circle) at a certain distance from the levitated image 111, the sensor 80 can sense the gesture information and feed it back to the controller 90. The controller 90 controls the display 11 to display the corresponding image based on the gesture information.

[0085] The human-computer interaction system 100 based on aerial imaging in this embodiment includes any of the aerial imaging systems described above, and can achieve the beneficial effects of any of the aerial imaging systems (10, 30, 40, 50).

[0086] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be incorporated into this application. No reference numerals in the claims should be construed as limiting the scope of the claims. Furthermore, it is clear that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. An aerial imaging system, characterized in that, include: A display used to emit light for images; and An imaging module, located in the optical path of the image light, is used to converge the image light and project the converged image light into the air to present a floating real image; The imaging module includes: A concave mirror has a light-receiving surface, which is used to receive and reflect the image light; A semi-transparent mirror, disposed on one side of the concave mirror, is used to reflect the image light emitted from the display to the light-receiving surface for reflection by the light-receiving surface, and to transmit the image light reflected by the light-receiving surface. The angle between the optical axis of the semi-transparent mirror and the concave mirror is β2 or β3, where 45° < β2 ≤ 50° and 40° ≤ β3 < 45°. The sum of the distance between the geometric center of the concave mirror and the geometric center of the semi-transparent mirror and the distance between the geometric center of the display and the geometric center of the semi-transparent mirror is greater than the focal length of the concave mirror.

2. The aerial imaging system as described in claim 1, characterized in that, The angle between the optical axis of the semi-transparent mirror and the concave mirror is β2. The aerial imaging system further includes: A light-shielding component is disposed on the side of the semi-transparent mirror away from the concave mirror and located between the optical axis of the concave mirror and the display. It is used to block stray light entering from the outside so that the image formed by the light-shielding component is located at the floating real image on the optical axis of the concave mirror after being projected by the imaging module.

3. The aerial imaging system as described in claim 1, characterized in that, When the angle between the optical axis of the semi-transparent mirror and the concave mirror is β2, the angle between the optical axis of the semi-transparent mirror and the horizontal direction is 1°-5°, so that the floating real image is located in the horizontal direction; when the angle between the optical axis of the semi-transparent mirror and the concave mirror is β3, the angle between the optical axis of the semi-transparent mirror and the horizontal direction is -5° to -1°, so that the floating real image is located in the horizontal direction.

4. The aerial imaging system as described in claim 1, characterized in that, The angle between the optical axis of the semi-transparent mirror and the concave mirror is β3. The aerial imaging system further includes: A light-shielding component is disposed on the side of the semi-transparent mirror away from the concave mirror and on the side of the optical axis of the concave mirror away from the display. It is used to block stray light entering from the outside so that the image formed by the light-shielding component is located at the floating real image on the optical axis of the concave mirror after being projected by the imaging module.

5. The aerial imaging system according to any one of claims 1-4, characterized in that, The imaging module also includes: A first reflecting mirror is disposed in the optical path of the image light to change the transmission direction of the image light.

6. The aerial imaging system as described in claim 2 or 4, characterized in that, The imaging module also includes: The second reflector is disposed on the side of the light-shielding member opposite to the concave mirror, and is used to reflect the image formed by the light-shielding member to the imaging module.

7. The aerial imaging system as claimed in claim 1, characterized in that, The geometric center of the display is connected to the geometric center of the semi-transparent mirror to form a first line, and the first line is perpendicular to the optical axis of the concave mirror.

8. A car, characterized in that, include: Vehicle body; The aerial imaging system as described in any one of claims 1-7 is disposed within the vehicle body, and the floating real image displayed by the aerial imaging system can be suspended at a target position within the vehicle body for observation and operation by the driver within the vehicle body.

9. A human-computer interaction system based on aerial imaging, characterized in that, include: The aerial imaging system as described in any one of claims 1-7 is used to project a floating real image; A sensor is used to sense touch or gestures directed at the floating image and to generate a sensing signal based on the touch or gesture. as well as A controller, connected to the sensor and the display, is used to receive the sensing signal and to control the display to display an image corresponding to the touch or gesture based on the sensing signal.

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