Projection device and vehicle

Abstract

This application provides a projection device and a vehicle. The projection device includes an optical engine, a first imaging carrier, a second imaging carrier, and a curved mirror. The optical engine has a light-emitting surface. The first imaging carrier is opposite to and spaced from the light-emitting surface, and can receive light emitted from the light-emitting surface. The second imaging carrier is located outside the optical path between the first imaging carrier and the light-emitting surface of the optical engine. The curved mirror is movable relative to the optical engine. When the curved mirror is not in operation, it is located outside the optical path between the first imaging carrier and the light-emitting surface, and the light emitted by the optical engine can reach the first imaging carrier, so that the first imaging carrier presents a first real image. When the curved mirror is in operation, it reflects the light emitted from the light-emitting surface to the second imaging carrier, so that the second imaging carrier presents a second real image. The embodiments of this application can flexibly adjust the imaging position of the projection device, so that the light from the optical engine can present a real image at different projection positions.

Description

Technical Field

[0001] This application relates to the field of projection, specifically to a projection device and a means of transportation. Background Technology

[0002] The role of vehicles and other modes of transportation is evolving from traditional means of transport to multifunctional leisure vehicles. While ensuring their basic driving function, vehicles can incorporate audio-visual entertainment features to meet users' entertainment needs. Currently, vehicles can be equipped with projection devices to provide users with a large-screen audio-visual experience. However, due to limited interior space and the fixed position and size of the projection screen, the user's viewing experience may be somewhat limited. For example, the viewing position may be restricted, failing to meet the comfort requirements of all passengers. Utility Model Content

[0003] The embodiments of this application provide a projection device and a vehicle that can flexibly adjust the imaging position of the projection device so that the light from the optical engine can present a real image at different projection positions.

[0004] In a first aspect, this application provides a projection device, including an optical engine, a first imaging carrier, a second imaging carrier, and a curved mirror. The optical engine has a light-emitting surface. The first imaging carrier is opposite to and spaced from the light-emitting surface, and is capable of receiving light emitted from the light-emitting surface. The second imaging carrier is located outside the optical path between the first imaging carrier and the light-emitting surface of the optical engine. The curved mirror is movable relative to the optical engine and includes an active state and a non-active state. When the curved mirror is in the non-active state, it is located outside the optical path between the first imaging carrier and the light-emitting surface, and the light emitted by the optical engine can reach the first imaging carrier to form a first real image. When the curved mirror is in the active state, it is located between the light-emitting surface and the first imaging carrier, and reflects the light emitted by the optical engine towards the second imaging carrier to form a second real image.

[0005] In this embodiment, when the curved mirror is located outside the optical path between the light-emitting surface and the first imaging carrier, the optical engine can emit light to the first imaging carrier. The first imaging carrier can receive the light and form a first real image. At this time, a user with their gaze directed towards the first imaging carrier can observe the information on the first imaging carrier. When the curved mirror is located within the optical path between the light-emitting surface and the first imaging carrier, the curved mirror can change the propagation direction of the light emitted from the light-emitting surface of the optical engine, so that the light passing through the curved mirror can reach the second imaging carrier, allowing a user with their gaze directed towards the second imaging carrier to observe the information on the second imaging carrier.

[0006] Curved mirrors can change the imaging position of a projection device by reflecting light from the optical engine. This allows the projected image to be displayed in different positions when the user is using the device, enabling the user to view the image from different directions and facilitating its use in various scenarios. When the projection device is applied to vehicles or other means of transportation, the user's viewing position can be anywhere outdoors without being limited by the confined space inside the vehicle, thus optimizing the user experience.

[0007] Curved mirrors can also change the projection ratio of a projection device, thereby solving the problem of adapting projection distance and projection image size in different projection scenarios. By installing a curved mirror in front of the existing optical engine, the projection ratio and projection direction are changed, and imaging is achieved in conjunction with a second imaging carrier, thus making the size of the real image more suitable for the user's requirements.

[0008] In this embodiment, the projection position can be switched by moving a curved mirror, without rotating or translating the optical engine. Therefore, the position of the optical engine is fixed relative to the mounting structure (e.g., a vehicle body). The relative position between the optical engine and the mounting structure is not easily changed, making the projected light from the optical engine more stable and the projection position more accurate.

[0009] In one possible implementation, the image area of ​​the first real image is smaller than the image area of ​​the second real image.

[0010] In this embodiment, the first real image has a small image area and can be used within a limited space. For example, in this embodiment, when the light from the optical engine is not reflected by the curved mirror, the optical engine can project the image directly forward. At this time, the position of the projected image can be opposite to the light-emitting surface of the optical engine. The projection device can be applied in the scenario of in-vehicle projection in a vehicle. For example, the position of the projected image can be located in front of the rear seats in the vehicle, and the projected image can be viewed by the rear passengers. The projected image can be information such as videos or games that can provide entertainment and leisure for the rear passengers.

[0011] When the curved mirror reflects the light from the optical engine, allowing the light to be transmitted to the second imaging carrier, the optical engine can project an image in the opposite direction. The curved mirror can project light emitted from the light-emitting surface of the optical engine in a direction away from the light-emitting surface. The projection device can then be used in scenarios such as exterior projection in vehicles; for example, the second imaging carrier can be a transmissive screen. Users can view information on the second imaging carrier from outside the vehicle. The image area of ​​the second real image on the second imaging carrier is larger than that of the first real image, providing users with a wider viewing angle, enhancing immersion, revealing more image details, and improving the user's visual experience.

[0012] In one possible implementation, the optical path from the light-emitting surface to the first imaging carrier is the first optical path, the width of the first real image is the first width, the optical path from the light-emitting surface to the second imaging carrier via the curved mirror is the second optical path, and the width of the second real image is the second width. The ratio of the first optical path to the first width is the first projection ratio, the ratio of the second optical path to the second width is the second projection ratio, and the first projection ratio is greater than or equal to the second projection ratio.

[0013] In this embodiment, a larger projection ratio can be achieved by extending the projection distance to create a larger screen. A larger projected screen significantly enhances the visual experience and application value. A larger screen covers a wider field of view, reduces environmental interference, and makes the viewer feel as if they are actually there, making it suitable for scenarios such as cinemas and games. A larger projection screen can support multi-window split-screen or detailed magnification, improving efficiency and collaboration in scenarios such as meetings and education. In some application scenarios, such as outdoor advertising and architectural projection, where large areas need to be covered, a large screen reduces viewer eye strain and improves comfort during extended viewing.

[0014] In one possible implementation, the second optical path is greater than the first optical path.

[0015] In this embodiment, light rays propagating through the curved mirror can travel a longer distance, allowing the beam to illuminate a larger area, thus increasing the size of the second real image. This increased projected image area significantly enhances visual interaction by improving immersion, increasing information presentation efficiency, and optimizing multi-user collaborative experiences, making it particularly suitable for scenarios such as education, commercial displays, and home entertainment.

[0016] In one possible implementation, the first projection ratio is greater than the second projection ratio, and the first optical path is greater than the second optical path.

[0017] In this embodiment, the throw ratio is a key parameter for projector installation and screen size design, directly affecting space utilization and image quality. Projection devices with a small throw ratio can save space and project a large image from a shorter distance, making them ideal for use in small spaces.

[0018] In one possible implementation, the ratio of the first projection ratio to the second projection ratio is less than or equal to 2.25.

[0019] In one possible implementation, the first projection ratio is in the range of 1.3-1.8.

[0020] In this embodiment, when the first projection ratio is in the range of 1.3-1.8, the projection device can project a suitable image within a limited distance. Compared to products with higher projection ratios, it does not require a long projection distance. In scenarios such as small living rooms, bedrooms, or vehicle interiors, even if the space is not deep enough, it can easily project a large-size image to meet viewing needs.

[0021] In one possible implementation, the second projection ratio is in the range of 0.8-1.3.

[0022] In this embodiment, the second projection ratio falls within this range; the smaller the projection ratio, the larger the projected image at the same distance. In small spaces, the projection device can project a large image from a shorter projection distance, saving space. Simultaneously, this projection ratio range meets most daily viewing and presentation needs, allowing users to flexibly adjust the projection distance according to the actual space to obtain the ideal image size, avoiding the inability to project a suitable image due to space limitations, and providing convenience for creating a large-screen experience in small spaces.

[0023] In one possible implementation, the first imaging carrier and the second imaging carrier are located on opposite sides of the optical engine, respectively.

[0024] In this embodiment, the first imaging carrier can be the imaging position when the optical engine projects forward, and the second imaging carrier can be the imaging position when the optical engine projects backward. By covering multiple imaging carriers (the first and second imaging carriers) with a single optical engine, equipment and installation costs can be saved, and redundant wiring can be avoided, making it particularly suitable for small spaces or budget-constrained scenarios. Furthermore, users can quickly switch imaging positions to adapt to different needs.

[0025] In one possible implementation, the projection device further includes a reflector that is movable relative to the optical engine. When the curved mirror is not in operation, the reflector is located outside the optical path between the first imaging carrier and the light-emitting surface, and inside the optical path between the light-emitting surface and the curved mirror. The reflector reflects the light from the light-emitting surface to the curved mirror.

[0026] Alternatively, when the curved mirror is in operation, the reflecting mirror is located in the optical path between the curved mirror and the second imaging carrier, and the reflecting mirror reflects the light reflected by the curved mirror to the second imaging carrier.

[0027] In this embodiment, the reflector can flexibly change the optical path between the curved mirror and the light-emitting surface of the optical engine, so that the light emitted from the light-emitting surface can be transmitted to the curved mirror.

[0028] As the angle or position of the reflector changes, the light reflected by the reflector can reach different positions on the reflecting surface of the curved mirror, thus altering the propagation direction of the projected light reflected by the curved mirror. In environments with limited space, flexible projection directions can cleverly utilize curved mirrors to reflect projected light to areas that would otherwise be difficult to reach. By properly setting up curved mirrors and adjusting the projection direction, it is possible to project images to suitable positions without occupying excessive space, achieving more efficient space layout and utilization.

[0029] Furthermore, the flexible projection direction can produce a wide variety of imaging effects. For example, by adjusting the incident position of the projected light on the curved mirror, the projected image can present unique shapes such as distortion, stretching, and rotation, bringing viewers a visually impactful and artistically captivating experience. This greatly enriches the means of visual expression and meets the needs for unique visual effects in different scenarios.

[0030] In one possible implementation, the reflector is a plane mirror or a curved mirror.

[0031] In this embodiment, when the reflector is a plane mirror, it can change the direction of light propagation. When the reflector is a curved mirror, aberrations in the optical system can be compensated by designing a specific curvature. Curved mirrors can change the direction of light propagation, making the optical system layout more compact.

[0032] In one possible implementation, the projection device further includes a driving device connected to a curved mirror, which is capable of controlling the movement of the curved mirror to move the second real image.

[0033] In one possible implementation, the projection device further includes a driving device connected to the reflector. When the curved mirror is in operation, the driving device can control the movement of the reflector so that the light reflected by the reflector can be projected onto different positions of the curved mirror.

[0034] Secondly, this application also provides a means of transportation, including a means of transportation body and a projection device as described above, wherein the optical engine is mounted on the means of transportation body.

[0035] In this embodiment, the optical projector can be fixed inside a vehicle or other means of transportation, primarily to create an immersive and personalized visual experience and interactive environment for passengers. On one hand, in terms of entertainment, it can project large, high-definition images, allowing passengers to enjoy a home theater-like viewing experience during long journeys, such as playing movies and TV series, thus alleviating travel fatigue. It can also be used for game projection, turning the vehicle interior into a mobile game center, enhancing the fun and immersion of games. On the other hand, from an information display perspective, the projector can display navigation information in real time, providing drivers with clear route guidance through a more intuitive and large-screen display, improving driving safety. Simultaneously, it can also display vehicle status information, such as speed, fuel consumption, and tire pressure, allowing passengers to stay informed about the vehicle's operating status. Furthermore, in business travel scenarios, the projector can be used for impromptu meeting presentations, facilitating information sharing and business communication among passengers, greatly improving the utilization efficiency and functionality of the vehicle interior space.

[0036] In one possible implementation, the first imaging carrier is located on the side of the optical engine facing the direction of travel of the vehicle, and the second imaging carrier is located on the top or side of the vehicle.

[0037] In one possible implementation, the first imaging carrier is located on the side of the optical engine facing the direction of travel of the vehicle, and the second imaging carrier is located on the side of the optical engine facing away from the direction of travel of the vehicle.

[0038] In one possible implementation, the first imaging carrier is located inside the vehicle body, and the second imaging carrier is located outside the vehicle body.

[0039] In one possible implementation, both the first imaging carrier and the second imaging carrier are located inside the vehicle body.

[0040] In one possible implementation, the projection device further includes a driving device capable of changing the position of the light rays projected by the optical engine reaching the curved mirror, thereby changing the position of the second real image. Attached Figure Description

[0041] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a schematic diagram of the vehicle provided in the embodiments of this application in the forward projection mode;

[0043] Figure 2 yes Figure 1 The diagram shows a structural schematic of a vehicle in reverse projection mode.

[0044] Figure 3 yes Figure 1 The diagram shows another structural schematic of the vehicle in reverse projection mode;

[0045] Figure 4 yes Figure 2 The diagram shows a structural schematic of the projection device in forward projection mode.

[0046] Figure 5 yes Figure 4 A schematic diagram of the projection device in reverse projection mode;

[0047] Figure 6 This is a schematic diagram of another projection device provided in this application embodiment in a forward projection state;

[0048] Figure 7 yes Figure 6 The diagram shows the structure of the projection device in a reverse projection state.

[0049] Figure 8 This is a schematic diagram of another projection device in a reverse projection state provided in the embodiments of this application;

[0050] Figure 9 This is a schematic diagram of another projection device in a reverse projection state provided in the embodiments of this application;

[0051] Figure 10 yes Figure 1 The diagram shows a structure in which the second imaging carrier is located on top of the vehicle body. Detailed Implementation

[0052] The specific embodiments of this application will now be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in other ways different from those described herein, and therefore, this application is not limited to these embodiments.

[0053] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0054] Multiple: refers to two or more.

[0055] Connection: should be interpreted broadly. For example, the connection between A and B can be a direct connection between A and B, or an indirect connection between A and B through an intermediary.

[0056] Perpendicularity: The perpendicularity defined in this application is not limited to an absolute perpendicular intersection (with an included angle of 90 degrees). It is permissible for non-absolute perpendicular intersections caused by factors such as assembly tolerances, design tolerances, and structural flatness. It is permissible for errors within a small angular range, such as an assembly error range of 80 to 100 degrees, which can all be understood as a perpendicular relationship.

[0057] It should be noted that in the description of this application, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0059] Please see Figure 1 , Figure 1This is a structural schematic diagram of the vehicle 100 provided in the embodiments of this application in a forward projection mode. The vehicle 100 in these embodiments can be a known vehicle such as a car, airplane, ship, or rocket, or it can be a newly emerging vehicle in the future. The car can be an electric vehicle, a gasoline-powered vehicle, or a hybrid vehicle, such as a pure electric vehicle, a range-extended electric vehicle, a hybrid electric vehicle, a fuel cell vehicle, or a new energy vehicle; this application does not specifically limit its type. The following description uses a vehicle as an example.

[0060] Please refer to the following: Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows a structural schematic of the vehicle 100 in reverse projection mode.

[0061] The vehicle 100 includes a vehicle body 10 and a projection device 20. The projection device 20 can be installed on the vehicle body 10. Figure 1 The X direction shown is the width direction of the vehicle 100. Figure 1 In the diagram, the Y-direction represents the length of the vehicle 100. The Y-direction also represents the forward direction of the vehicle body 10. Figure 1 In the diagram, the Z direction represents the height of vehicle 100.

[0062] It should be noted that, Figure 1 and Figure 2 The purpose is merely to illustratively describe the connection relationship between the vehicle body 10 and the projection device 20, and is not to specifically limit the connection positions, specific structures, or quantities of each device. Furthermore, the structures illustrated in the embodiments of this application do not constitute a specific limitation on the vehicle 100. In other embodiments of this application, the vehicle 100 may include... Figure 1 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements.

[0063] The vehicle body 10 includes a body frame 11 and a door 12. The body frame 11 is the basic load-bearing structure of the vehicle body 10. The door 12 is connected to the body frame 11 and can open and close relative to the body frame 11.

[0064] The vehicle body support frame 11 may include the vehicle's front longitudinal beams, rear longitudinal beams, roof crossbeams, A-pillars, B-pillars, C-pillars, etc. These structures can collectively bear the impact force of a collision and ensure the overall stability of the vehicle body 10. For example, the material of the vehicle body support frame 11 may include high-strength steel or aluminum alloy, and the various parts of the vehicle body support frame 11 can be welded or riveted to form a rigid frame.

[0065] The door 12 can be rotatably connected to the body support 11. For example, when the door 12 is a side door, it can be connected to a pillar (such as an A-pillar or B-pillar) of the body support 11 via a hinge. Alternatively, when the door 12 is a tailgate, it can be connected to the rear crossbeam or an extension of the rear longitudinal beam of the body support 11 via a hinge. The hinge provides a pivot, allowing the door 12 to open outwards or slide about the pivot. The following description, along with the accompanying drawings, uses the example of the door 12 being a tailgate.

[0066] The projection device 20 includes a first imaging carrier 21, a second imaging carrier 22, an optical engine 23, and a curved mirror 24. The first imaging carrier 21 can receive light and form an image when the projection device 20 is in forward projection mode. The curved mirror 24 can change the propagation direction of light from the optical engine 23, so that the optical engine 23 can project in reverse. The second imaging carrier 22 can receive light and form an image when the projection device 20 is in reverse projection mode.

[0067] In this embodiment, the first imaging carrier 21 can be the imaging position when the optical engine 23 projects forward, and the second imaging carrier 22 can be the imaging position when the optical engine 23 projects backward. By covering multiple imaging carriers (the first imaging carrier 21 and the second imaging carrier 22) with a single optical engine 23, equipment and installation costs can be saved, and redundant wiring can be avoided, making it especially suitable for small apartments or budget-constrained scenarios. At the same time, users can quickly switch imaging positions to adapt to different needs.

[0068] Both the first imaging carrier 21 and the second imaging carrier 22 can be located inside the vehicle body 10. Alternatively, the first imaging carrier 21 can be located inside the vehicle body 10, and the second imaging carrier 22 can be located outside the vehicle body 10. The first imaging carrier 21 and the second imaging carrier 22 are located on opposite sides of the optomechanism 23. The first imaging carrier 21 can be located on the side of the optomechanism 23 facing the direction of travel (Y direction) of the vehicle 100, and the second imaging carrier 22 can be located on the side of the optomechanism 23 facing the opposite direction of travel (opposite direction of the Y direction) of the vehicle 100.

[0069] For details, please refer to [link / reference]. Figure 1 The first imaging carrier 21 can be connected to the vehicle interior. The first imaging carrier 21 can be connected to the roof of the vehicle body support 11. Alternatively, the first imaging structure can be installed on the back of the vehicle seat. The first imaging carrier 21 can be deployed via a concealed electric lifting device when in use. The deployed first imaging carrier 21 can be positioned between the driver's seat and the rear passengers. The first imaging carrier 21 can be rolled up when not in use. Alternatively, the first imaging carrier 21 can be removed from the roof of the vehicle when not in use, avoiding obstructing passenger movement space.

[0070] The surface of the first imaging carrier 21 can be enhanced with a special coating (such as glass beads, metal particles, or optical microstructures) to improve light reflection efficiency, thereby increasing image brightness, contrast, and color saturation. The first imaging carrier 21 can reduce light scattering, preventing the projected image from appearing grayish or discolored. For example, the size of the first imaging carrier 21 can be in the range of 30 inches to 40 inches (inclusive).

[0071] Please refer to the following: Figure 2 The second imaging carrier 22 can be connected to the vehicle door 12. Specifically, the second imaging carrier 22 can be connected to the side of the vehicle door 12 facing inwards. When in use, the vehicle door 12 is opened relative to the vehicle body support 11, and the second imaging carrier 22 unfolds vertically. When not in use, the second imaging carrier 22 can be rolled up. Alternatively, the second imaging carrier 22 can be detached from the vehicle door 12 and stored in the trunk of the vehicle 100. In this embodiment, the vehicle door 12 is the vehicle trunk door, which has a large space when opened, so that the second imaging carrier 22 can provide a wider field of view and a more immersive viewing experience. For example, the second imaging carrier 22 can be a transmissive screen. The size of the second imaging carrier 22 can be in the range of 50 inches to 60 inches (inclusive).

[0072] In some other possible implementations, please refer to Figure 3 , Figure 3 yes Figure 1 The diagram shows another structural representation of the vehicle 100 in reverse projection mode. The second imaging carrier 22 can also be connected to the vehicle interior. The second imaging carrier 22 can be connected to the roof of the vehicle body support 11 and located behind the rear seats. When the projection device 20 projects in reverse, the second imaging carrier 22 can be unfolded. Furthermore, the second imaging carrier 22 can be a transmissive screen, exposed when the vehicle door 12 (trunk door) is opened, for use by users outside the vehicle. For example, the second imaging carrier 22 can be rolled up when not in use. Alternatively, the second imaging carrier 22 can be removed from the roof position inside the vehicle when not in use, avoiding obstructing passenger movement space.

[0073] In this embodiment, the light emitted by the projection device 20 is projected onto the second imaging carrier 22. After passing through the second imaging carrier 22, a clear image is formed on the other side of the second imaging carrier 22 for the user to view. For example, the second imaging carrier 22 can be made of transparent or translucent materials, such as specially made frosted glass, thin cloth, translucent plastic sheets and plastic sheets, and special thin film coatings. These materials have good transmission properties, allowing most of the light to pass through while maintaining certain light scattering and reflection characteristics to ensure image clarity and brightness.

[0074] Viewers can watch the projected image from the other side of the second imaging carrier 22. The optical engine 23 can be installed inside the vehicle 100, and users can use the projection device 20 outside the vehicle. Users are not limited to the small space inside the vehicle, which improves the comfort and concentration of users when watching the movie.

[0075] The optical engine 23 can be installed inside the vehicle body 10. The optical engine 23 has a light-emitting surface 231. The light-emitting surface 231 can face the Y direction and can be tilted in the opposite direction of the Z direction. A first imaging carrier 21 is opposite to and spaced from the light-emitting surface 231, and the first imaging carrier 21 can receive light emitted from the light-emitting surface 231. A second imaging carrier 22 is located outside the optical path between the first imaging carrier 21 and the light-emitting surface 231 of the optical engine 23.

[0076] In this embodiment, the projector 23 is fixed inside the vehicle, creating an immersive and personalized visual experience and interactive environment for passengers. For entertainment, it can project large, high-definition images, allowing passengers to enjoy a home theater-like viewing experience during long journeys, such as playing movies and TV series to alleviate travel fatigue. It can also be used for game projection, turning the vehicle interior into a mobile game center, enhancing the fun and immersion of games. Simultaneously, it can display vehicle status information, such as speed, fuel consumption, and tire pressure, allowing passengers to stay informed about the vehicle's operating status. Furthermore, in business travel scenarios, the projector 23 can be used for impromptu meeting presentations, facilitating information sharing and business communication among passengers, greatly improving the utilization efficiency and functionality of the vehicle interior space. Additionally, the projector 23 can directly utilize the vehicle's power supply, eliminating the need for an external power source.

[0077] The curved mirror 24 can be mounted on the vehicle 100 via a drive device. For example, the curved mirror 24 can be mounted on the roof sheet metal via a drive device (not shown). The drive device can be fixedly mounted on the vehicle body 10. The curved mirror 24 can be connected to the drive device. Specifically, the curved mirror 24 can be connected to the drive device via magnetic attraction, snap-fit, or other detachable means, or via gears, chains, or other transmission methods. The drive device can control the movement of the curved mirror 24 relative to the vehicle body 10. When the curved mirror 24 is needed, the drive device can move the curved mirror 24 from outside the optical path between the optical engine 23 and the first imaging carrier 21 to inside the optical path between the optical engine 23 and the first imaging carrier 21, so that the curved mirror 24 can reflect the light emitted by the optical engine 23.

[0078] Alternatively, the curved mirror 24 can be directly mounted to the vehicle body 10 via magnetic attraction, snap-fit, or other detachable methods. The curved mirror 24 is movable relative to the optical engine 23. For example, when the projection device 20 needs to perform forward projection, the curved mirror 24 can be removed from the vehicle body 10, and the curved mirror 24 is in a non-operating state. When the projection device 20 needs to perform reverse projection, the curved mirror 24 can be mounted on the vehicle body 10, and the curved mirror 24 is in an operating state.

[0079] The curved mirror 24 can be either a spherical mirror or an aspherical mirror. An aspherical mirror is a lens whose surface curvature radius varies from the center to the edge. In this paper, it specifically refers to a rotationally symmetric aspherical surface, which can be used to correct aberrations and improve image quality. Alternatively, the curved mirror 24 can also be a freeform mirror 24. A freeform mirror 24 is a surface that cannot be described by basic geometry and is usually expressed using higher-order polynomials. It has a higher degree of design freedom than conventional aspherical surfaces, allowing for manual control of the reflection angle and direction of each ray of light.

[0080] Specifically, the curved mirror 24 can be a concave mirror. The curved mirror 24 can receive the light emitted by the optical engine 23 and converge the light before reflecting it towards the second imaging carrier 22. After receiving the light converged and reflected by the concave mirror, the second imaging carrier 22 will present a reduced image (compared to the image size after reflection by the plane mirror). At this time, the projection ratio of the reverse projection of the projection device 20 becomes larger than that of the forward projection of the projection device 20.

[0081] The curved mirror 24 can also be a convex mirror. The convex mirror can receive the light emitted by the optical engine 23, amplify the beam, and reflect it towards the second imaging carrier 22. The second imaging carrier 22 receives the beam amplified by the curved mirror 24, thereby forming a magnified image (compared to the image size after reflection by the plane mirror). At this time, the projection ratio of the reverse projection of the projection device 20 becomes smaller compared to the forward projection of the projection device 20.

[0082] The curved mirror 24 includes working and non-working states, such as... Figure 1 When the curved mirror 24 is not in operation, it is located outside the optical path between the first imaging carrier 21 and the light-emitting surface 231. The light emitted by the optical engine 23 can reach the first imaging carrier 21 so that the first imaging carrier 21 presents a first real image.

[0083] like Figure 2When the curved mirror 24 is in operation, it can be moved by a driving device to a position between the light-emitting surface 231 and the first imaging carrier 21. The curved mirror 24 reflects the light from the light-emitting surface 231 towards the second imaging carrier 22, so that the second imaging carrier 22 presents a second real image. For example, the driving device can control the curved mirror 24 to move (translate and / or rotate) in the optical path between the light-emitting surface 231 and the first imaging carrier 21, so that the second real image moves.

[0084] In this embodiment, when the curved mirror 24 is located outside the optical path between the light-emitting surface 231 and the first imaging carrier 21, the optomechanical system 23 can emit light to the first imaging carrier 21. The first imaging carrier 21 can receive the light and form a first real image. At this time, a user with their gaze directed towards the first imaging carrier 21 can observe the information on the first imaging carrier 21. When the curved mirror 24 is located within the optical path between the light-emitting surface 231 and the first imaging carrier 21, the curved mirror 24 can change the propagation direction of the light emitted from the light-emitting surface 231 of the optomechanical system 23, so that the light passing through the curved mirror 24 can reach the second imaging carrier 22, allowing a user with their gaze directed towards the second imaging carrier 22 to observe the information on the second imaging carrier 22.

[0085] The curved mirror 24 can change the imaging position of the projection device 20 by reflecting the light from the optical engine 23. This allows the projected image to be displayed in different positions when the user uses the projection device 20, enabling the user to view the projected image from different directions and facilitating its use in various scenarios. When the projection device 20 is applied to vehicles or other transportation vehicles 100, the user's viewing position can be anywhere outdoors without being limited by the confined space inside the vehicle, thus optimizing the user experience.

[0086] The curved mirror 24 can also change the projection ratio of the projection device 20, thereby solving the problem of matching the projection distance and the size of the projected image in the front and rear projection scenarios of the vehicle. By installing the curved mirror 24 in front of the original optical engine 23, the projection ratio and projection direction are changed. Combined with the door 12, a simple bracket and the second imaging carrier 22 are used to achieve rear projection imaging, thereby effectively utilizing the in-vehicle optical engine 23 and the external environment of the vehicle.

[0087] In this embodiment, the projection position can be switched by moving the curved mirror 24 without rotating or translating the optical engine 23. Therefore, the position of the optical engine 23 is fixed relative to the vehicle body 10. The relative position between the optical engine 23 and the vehicle body 10 is not easily changed by the shaking caused by the movement of the vehicle 100, so that the projected light from the optical engine 23 is more stable and the projection position is more accurate.

[0088] Figure 4 yes Figure 2 The diagram shows a structural schematic of the projection device 20 in forward projection mode. Figure 5yes Figure 4 The diagram shows the structure of the projection device 20 in reverse projection mode.

[0089] The projection device 20 includes a forward projection mode and a reverse projection mode. For example... Figure 1 and Figure 4 When the projection device 20 is in forward projection mode, the curved mirror 24 is in a non-operating state. The curved mirror 24 is located outside the optical path between the light-emitting surface 231 of the optical engine 23 and the first imaging carrier 21. The optical engine 23 can be used independently. The optical engine 23 can emit light to the first imaging carrier 21. The first imaging carrier 21 receives the light to form a first real image.

[0090] At this time, the optical path between the light-emitting surface 231 and the first imaging carrier 21 is the first optical path, and the width of the first real image is the first width. The width of the first real image is also the size of the first real image in the X direction. The ratio of the first optical path to the first width is the first projection ratio, which is in the range of 1.3-1.8.

[0091] In this embodiment, when the first projection ratio is in the range of 1.3-1.8, the projection device 20 can project a suitable image within a limited distance. Compared with products with higher projection ratios, it does not require a long projection distance. In scenarios such as small living rooms, bedrooms, or vehicle interiors, even if the space is not deep enough, it can easily project a large-size image to meet the viewing needs.

[0092] When the projection device 20 is in reverse projection mode, such as Figure 2 and Figure 5 The curved mirror 24 is in operation. The curved mirror 24 is located between the light-emitting surface 231 of the optical engine 23 and the optical path of the first imaging carrier 21. The curved mirror 24 can change the propagation direction of the light emitted from the optical engine 23. The light propagates towards the second imaging carrier 22. The second imaging carrier 22 receives the light to form a second real image. The second real image can provide image information to the user.

[0093] In one possible implementation, the optical path from the light-emitting surface 231 to the second imaging carrier 22 via the curved mirror 24 is the second optical path, and the width of the second real image is the second width. The width of the second real image is the dimension of the second real image in the X direction. The ratio of the second optical path to the second width is the second projection ratio, and the first projection ratio is greater than the second projection ratio.

[0094] In this embodiment, the throw ratio is a key parameter for projector installation and screen size design, directly affecting space utilization and image quality. A projection device 20 with a small throw ratio can save space and project a large image from a shorter distance, making it ideal for use in small spaces.

[0095] Specifically, the relationship between the second optical path and the first optical path is not limited. The second projection ratio is in the range of 0.8-1.3. The ratio of the first projection ratio to the second projection ratio is less than or equal to 2.25.

[0096] In this embodiment, the second projection ratio falls within this range; the smaller the projection ratio, the larger the projected image at the same distance. In small spaces, the projection device 20 can project a large image at a shorter projection distance, saving space. Simultaneously, this projection ratio range meets most daily viewing and presentation needs. Users can flexibly adjust the projection distance according to the actual space to obtain the ideal image size, avoiding the inability to project a suitable image due to space limitations, thus providing convenience for creating a large-screen experience in small spaces.

[0097] In another possible implementation, the second optical path is greater than the first optical path. The first projection ratio is greater than or equal to the second projection ratio.

[0098] In this embodiment, the light rays propagating through the curved mirror 24 can travel a longer distance, allowing the beam to illuminate a larger area, thus resulting in a larger image area for the second real image. This increased projected image area significantly enhances visual interaction by improving immersion, increasing information presentation efficiency, and optimizing multi-user collaborative experiences, making it particularly suitable for scenarios such as education, commercial displays, and home entertainment.

[0099] A larger throw ratio allows for a larger screen by extending the projection distance. A larger projected image significantly enhances the visual experience and application value. A larger screen covers a wider field of view, reduces environmental interference, and makes viewers feel as if they are actually there, making it suitable for cinemas, games, and other similar scenarios. A larger projection image can support multi-window split-screen or detailed magnification, improving efficiency and collaboration in meetings, education, and other scenarios. In some applications, such as outdoor advertising and architectural projection, where large areas need to be covered, a large screen reduces viewer eye strain and improves comfort during extended viewing.

[0100] The size of the second real image can be adjusted by adjusting the optical path or the projection ratio so that the image area of ​​the first real image is smaller than that of the second real image.

[0101] In this embodiment, the area of ​​the first real image is smaller than that of the second real image, allowing the first real image to be used within a limited space. For example, in this embodiment, when the light from the optical engine 23 is not reflected by the curved mirror 24, the optical engine 23 can project an image directly in front of the light source. At this time, the position of the projected image of the optical engine 23 can be opposite to the light-emitting surface 231 of the optical engine 23. The projection device 20 can be applied in the scenario of in-vehicle projection in a vehicle. For example, the position of the projected image can be located in front of the rear seats in the vehicle, and the projected image can be viewed by the rear passengers. The projected image can be information such as videos or games that can provide entertainment and leisure for the rear passengers.

[0102] When the curved mirror 24 reflects the light from the optical engine 23, allowing the light from the optical engine 23 to be transmitted to the second imaging carrier 22, the optical engine 23 can project an image in the opposite direction. The curved mirror 24 can project the light emitted from the light-emitting surface 231 of the optical engine 23 in a direction away from the light-emitting surface 231. The projection device 20 can then be used in scenarios such as exterior projection in vehicles. For example, the second imaging carrier 22 can be a transmissive screen. Users can view information on the second imaging carrier 22 from outside the vehicle. The image area of ​​the second real image on the second imaging carrier 22 is larger than that of the first real image, providing users with a wider viewing angle, enhancing their immersion, displaying more image details, and improving their visual experience.

[0103] Alternatively, the second imaging carrier 22 can be the rear windshield of the vehicle 100. The light from the optomechanical system 23 is reflected by the curved mirror 24 onto the rear windshield to form an image, providing driving information to the following vehicle, thereby improving information interaction between adjacent vehicles and enhancing driving safety.

[0104] For some possible implementation methods, please refer to the following: Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of another projection device 20 provided in the embodiments of this application in a forward projection state. Figure 7 yes Figure 6 The diagram shows the projection device 20 in a reverse projection state. The projection device 20 also includes a reflector 25.

[0105] The reflector 25 can be mounted on the vehicle 100 via a drive device. For example, the reflector 25 can be mounted on the roof panel via a drive device. The drive device can be fixedly mounted on the vehicle body 10. The reflector 25 can be connected to the drive device. Specifically, the reflector 25 can be connected to the drive device via magnetic attraction, snap-fit, or other detachable means, or via gears, chains, or other transmission methods. The drive device can control the movement of the reflector 25 relative to the vehicle body 10. When the reflector 25 is needed, the drive device can move the reflector 25 from outside the optical path of the optical engine 23 and the curved mirror 24 to inside the optical path of the optical engine 23 and the curved mirror 24, so that the reflector 25 can reflect the light emitted by the optical engine 23.

[0106] Alternatively, the reflector 25 can be directly mounted to the vehicle body 10 via magnetic attraction, snap-fit, or other detachable methods. The reflector 25 is movable relative to the optical engine 23. For example, when the projection device 20 needs to perform forward projection, the reflector 25 can be removed from the vehicle body 10. When the projection device 20 needs to perform reverse projection, the reflector 25 can be mounted on the vehicle body 10.

[0107] In some possible implementations, the projection device 20 may further include a housing 26, within which the reflector 25 and the curved mirror 24 can be mounted. The housing 26 can be connected to the vehicle body 10 via a drive device (not shown). The drive device can control the movement of the housing 26 relative to the vehicle body 10, thereby moving the curved mirror 24 and the reflector 25. The drive device can be fixedly mounted to the vehicle body 10, and the housing 26 can be detachably connected to the drive device. For example, the housing 26 can be connected to the drive device via structural snap-fit, threaded fastening, or magnetic attraction. Alternatively, the housing 26 can be directly mounted to the vehicle body 10 via magnetic attraction, snap-fit, or other detachable methods. For example, when the projection device 20 needs to perform forward projection, the housing 26 can be removed from the vehicle body 10. When the projection device 20 needs to perform reverse projection, the housing 26 can be mounted on the vehicle body 10. When the projection device 20 is in forward projection mode, the housing 26 and the curved mirror 24 and reflector 25 inside the housing are outside the path of light propagation of the optical engine 23, and the curved mirror 24 is in a non-working state.

[0108] The housing 26 can move relative to the optical engine 23 under the control of the drive device, so that the housing 26 moves in front of the optical engine 23, the curved mirror 24 is in working state, and the reflector 25 can be located within the optical path between the curved mirror 24 and the light-emitting surface 231. The reflector 25 and the curved mirror 24 inside the housing 26 can reflect the light emitted by the optical engine 23, so that the light reaches the second imaging carrier 22. Specifically, the light emitted by the optical engine 23 can first be reflected by the reflector 25 and then reach the curved mirror 24. The curved mirror 24 receives the light reflected by the reflector 25 and propagates the light to the second imaging carrier 22.

[0109] In some other embodiments, the driving device may also drive the reflector 25 and the curved mirror 24 separately to change the relative position and / or relative angle between the reflector 25 and the curved mirror 24, so as to change the projection direction when the projection device 20 projects backward.

[0110] For example, please refer to Figure 8 , Figure 8 This is a schematic diagram of another projection device 20 in a reverse projection state provided in an embodiment of this application. The reflector 25 can be a plane mirror.

[0111] In this embodiment, the planar reflector 25 increases the optical path by reflecting light within a limited space. When light is reflected between the reflector 25 and the curved mirror 24, its actual propagation path (optical path) is significantly extended, while the physical space remains unchanged. This method of extending the optical path, combined with the lens or imaging element in the projection device 20, allows the projected light to travel a longer path before reaching the imaging carrier, thereby enabling a larger projected image through optical magnification principles (such as the relationship between the focal length of the lens and the object distance and image distance) even with a limited projection distance.

[0112] First, in space-constrained environments (such as vehicles, classrooms, or portable projection devices), large-screen projection can be achieved without increasing physical distance. Second, by precisely controlling the angle and spacing of the reflectors 25°, image size and clarity can be flexibly adjusted, enhancing the user experience. Furthermore, this technology is low-cost and easy to implement, suitable for various projection scenarios, and balances portability and practicality.

[0113] Alternatively, the reflector 25 can also be a curved mirror 24.

[0114] In this embodiment, when the reflector 25 is a curved mirror 24, aberrations in the optical system can be compensated by designing a specific curvature. The curved mirror 24 can change the direction of light propagation, making the optical system layout more compact.

[0115] In some possible implementations, when the reflector 25 is located within the optical path between the light-emitting surface 231 and the curved mirror 24, the reflector 25 reflects the light from the light-emitting surface 231 towards the curved mirror 24. The driving device can also control the movement (translation or rotation) of the reflector 25, thereby flexibly changing the optical path between the curved mirror 24 and the light-emitting surface 231 of the optical engine 23, so that the light emitted from the light-emitting surface 231 can be transmitted to different reflection positions of the curved mirror 24, thereby moving the position of the second real image.

[0116] In this embodiment, the projection device 20 can also adjust the position of the second real image in real time to bring users a more immersive user experience and increase the applicable usage scenarios of the projection device 20.

[0117] For other possible implementations, please refer to Figure 9 , Figure 9 This is a schematic diagram of another projection device 20 in a reverse projection state provided in this application embodiment. The reflector 25 is located in the optical path between the curved mirror 24 and the second imaging carrier 22. The reflector 25 reflects the light reflected by the curved mirror 24 towards the second imaging carrier 22. That is, the light emitted by the optical engine 23 can pass sequentially through the reflecting surface of the curved mirror 24 and the reflecting surface of the reflector 25 before reaching the second imaging carrier 22.

[0118] For example, the projection device 20 may also include a plurality of reflectors 25, which may be located within the optical path between the curved mirror 24 and the second imaging carrier 22. The light reflected by the curved mirror 24 may be reflected sequentially by the plurality of reflectors 25, so that the optical path can be further folded.

[0119] Alternatively, multiple mirrors 25 can be located in the optical path between the light-emitting surface 231 of the optical engine 23 and the curved mirror 24.

[0120] Alternatively, a portion of the multiple mirrors 25 may be located in the optical path between the light-emitting surface 231 of the optical engine 23 and the curved mirror 24, while another portion of the mirrors 25 may be located in the optical path between the curved mirror 24 and the second imaging carrier 22.

[0121] In this embodiment, the precise arrangement of the reflector 25 changes the light propagation path, "folding" the light path that originally required long-distance straight-line transmission into a more compact short-range structure, thereby achieving efficient light transmission and imaging functions within a limited space. For example, in an ultra-short-throw projector, folding the light path can significantly shorten the projection distance, enabling the projection device 20 to project a large-size image while reducing the thickness of the device body.

[0122] For some other possible embodiments, please refer to Figure 10 , Figure 10 yes Figure 1 The diagram shows a structure in which the second imaging carrier 22 is located on top of the vehicle body 10 in the vehicle 100. The first imaging carrier 21 is located on the side of the optomechanical unit 23 facing the direction of travel of the vehicle 100, and the second imaging carrier 22 is located on the top or side of the vehicle 100. The second imaging device can be a side window or skylight of the vehicle body 10, etc.

[0123] In this embodiment, when the projection device 20 is applied to a vehicle, its function in projecting onto the side window is to transform the side window into a dynamic information display interface, integrating safety warnings, entertainment interaction, and functional expansion. For example, in autonomous or assisted driving scenarios, the projection can display blind spot monitoring warnings (such as highlighted markers for vehicles approaching from the side), navigation arrows (indicating lane change opportunities), or pedestrian avoidance prompts in real time, improving driving safety. During long-distance driving, passengers can watch movies, games, or view real-time traffic information through the side window without affecting the driver's observation of the outside environment; during nighttime driving, the projection can display ambient lighting effects or personalized welcome messages, enhancing the sense of ritual for the driving experience. In addition, this technology can also be used in emergency rescue scenarios, such as automatically projecting a distress signal (SOS pattern) onto the side window when the vehicle breaks down, facilitating rapid external identification.

[0124] The projection device projects onto the sunroof 20 times, projecting starry skies, the Milky Way, or dynamic constellation maps, creating a stargazing atmosphere with sound effects and enhancing the nighttime driving experience. Using the sunroof as an imaging medium, it can also play movies, animations, or interactive games, acting as a "giant screen" suitable for family outings or long trips. The sunroof projection can also project dynamic light and shadow effects (such as aurora and raindrop effects) based on holidays, weather, or user preferences. In case of vehicle malfunction or danger, it can project warning symbols (such as warning triangles and distress signals).

[0125] In some other possible implementations, the first imaging carrier 21 is located inside the vehicle body 10, and the second imaging carrier 22 is located outside the vehicle body 10.

[0126] Specifically, the second imaging carrier 22 can operate independently of the vehicle body 10. When imaging is actually needed, the second imaging carrier 22 can be placed outside the vehicle. The vehicle door 12 (e.g., the tailgate) can be opened, and the projection direction of the projection device 20 can be adjusted to project the image onto the second imaging carrier 22 outside the vehicle or other means of transport 100. This allows users to view the projected image from outside the vehicle, facilitating use in scenarios such as camping. The user's viewing position can be anywhere outdoors without being limited by the confined space inside the vehicle, thus optimizing the user experience.

[0127] Furthermore, after the second imaging carrier 22 is placed, the position of the second real image can be adjusted by using a driving device to adjust the position of the reflector 25 and / or the curved mirror 24, so that the second imaging carrier 22 can receive the second real image for the user to read the information from the second real image. This eliminates the need for frequent adjustments to the position of the second imaging carrier 22, reduces its dependence on a flat surface, and eliminates the need for prolonged manual calibration.

[0128] The above are exemplary embodiments of this application. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A projection device, characterized in that, include: An optical engine having a light-emitting surface; A first imaging carrier is opposite to and spaced from the light-emitting surface, and the first imaging carrier is capable of receiving light emitted from the light-emitting surface. The second imaging carrier is located outside the optical path between the first imaging carrier and the light-emitting surface of the optical engine; The system includes a curved mirror that is movable relative to the optical engine. The curved mirror has a working state and a non-working state. When the curved mirror is in the non-working state, it is located outside the optical path between the first imaging carrier and the light-emitting surface, and the light emitted by the optical engine can reach the first imaging carrier so that the first imaging carrier presents a first real image. When the curved mirror is in the working state, it is located between the light-emitting surface and the first imaging carrier, and the curved mirror reflects the light emitted by the optical engine towards the second imaging carrier so that the second imaging carrier presents a second real image.

2. The projection device according to claim 1, characterized in that, The image area of ​​the first real image is smaller than the image area of ​​the second real image.

3. The projection device according to claim 2, characterized in that, The optical path between the light-emitting surface and the first imaging carrier is the first optical path, the width of the first real image is the first width, the optical path from the light-emitting surface to the second imaging carrier via the curved mirror is the second optical path, and the width of the second real image is the second width. The ratio of the first optical path length to the first width is the first projection ratio, and the ratio of the second optical path length to the second width is the second projection ratio. The first projection ratio is greater than or equal to the second projection ratio.

4. The projection device according to claim 3, characterized in that, The second optical path is greater than the first optical path.

5. The projection device according to claim 3, characterized in that, The first projection ratio is greater than the second projection ratio, and the first optical path is greater than the second optical path.

6. The projection device according to claim 3, characterized in that, The ratio of the first projection ratio to the second projection ratio is less than or equal to 2.

25.

7. The projection device according to claim 6, characterized in that, The first projection ratio is in the range of 1.3-1.

8.

8. The projection device according to claim 7, characterized in that, The second projection ratio is in the range of 0.8-1.

3.

9. The projection device according to any one of claims 1-8, characterized in that, The first imaging carrier and the second imaging carrier are located on opposite sides of the optical engine, respectively.

10. The projection device according to any one of claims 1-8, characterized in that, The projection device also includes a reflector that is movable relative to the optical engine. When the curved mirror is in a non-working state, the reflector is located outside the optical path between the first imaging carrier and the light-emitting surface. When the curved mirror is in the working state, the reflector is located inside the optical path between the light-emitting surface and the curved mirror. The reflector reflects the light from the light-emitting surface to the curved mirror. Alternatively, when the curved mirror is in the working state, the reflecting mirror is located in the optical path between the curved mirror and the second imaging carrier, and the reflecting mirror reflects the light reflected by the curved mirror toward the second imaging carrier.

11. The projection device according to claim 10, characterized in that, The reflector is a plane mirror or a curved mirror.

12. The projection device according to claim 1 or 2, characterized in that, The projection device further includes a driving device connected to the curved mirror, which can control the movement of the curved mirror to move the second real image.

13. The projection device according to claim 10, characterized in that, The projection device also includes a driving device connected to the reflector. The driving device can control the movement of the reflector so that the light reflected by the reflector can be projected onto different positions of the curved mirror.

14. A means of transportation, characterized in that, It includes a vehicle body and a projection device as described in any one of claims 1-13, wherein the optical engine is mounted on the vehicle body.

15. The means of transport according to claim 14, characterized in that, The first imaging carrier is located on the side of the optical engine facing the direction of travel of the vehicle, and the second imaging carrier is located on the top or side of the vehicle.

16. The means of transport according to claim 14, characterized in that, The first imaging carrier is located on the side of the optical engine facing the direction of travel of the vehicle, and the second imaging carrier is located on the side of the optical engine facing away from the direction of travel of the vehicle.

17. The means of transport according to claim 14, characterized in that, The first imaging carrier is located inside the vehicle body, and the second imaging carrier is located outside the vehicle body.

18. The means of transport according to claim 14, characterized in that, Both the first imaging carrier and the second imaging carrier are located inside the vehicle body.

19. The means of transport according to claim 14, characterized in that, The projection device also includes a driving device, which can change the position of the light rays projected by the optical engine reaching the curved mirror, thereby changing the position of the second real image.

Images