Projection system, reflective structure, optical engine and vehicle

Abstract

This application provides a projection system, a reflective structure, an optical engine, and a vehicle. The projection system includes an optical engine and a reflective structure. The optical engine includes an optical engine housing, a lens, a sensor, and a processor. The optical engine housing has a receiving cavity and a light-transmitting aperture. An installation area is provided on the outer surface of the optical engine housing. The lens is installed within the receiving cavity, and the sensor is installed on the optical engine housing within the installation area. The reflective structure is connected to the outer surface of the optical engine housing. When the reflective structure is connected to the optical engine housing, its orthogonal projection onto the installation area covers the sensor. The processor adjusts the image light based on the information identified by the sensor. This application's technical solution expands the application scenarios of the projection system, allowing users to observe the projected image outside the vehicle, and simplifies the operation process during scenario switching, thereby improving the user experience.

Description

Technical Field

[0001] This application relates to the field of projection, specifically to a projection system, a reflective structure, an optomechanic, and a vehicle. Background Technology

[0002] The role of vehicles and other modes of transportation is evolving from traditional means of transportation to multifunctional leisure vehicles. While ensuring their 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] Embodiments of this application provide a projection system, a reflective structure, an optical engine, and a vehicle, which can increase the application scenarios of the projection system, allowing users to observe the projected image outside the vehicle, and simplify the operation process of the projection system during the switching of application scenarios, thereby improving the user experience.

[0004] In a first aspect, this application provides a projection system, including an optical engine, a reflective structure, and a processor. The optical engine includes an optical engine housing, an image source, a lens, and a sensor. The optical engine housing has a receiving cavity and a light-transmitting aperture, the light-transmitting aperture connecting the receiving cavity to the outside of the optical engine. An installation area is provided on the outer surface of the optical engine housing, surrounding the light-transmitting aperture. The lens is installed inside the receiving cavity, with its light-emitting surface facing the light-transmitting aperture. The sensor is installed in the optical engine housing and located within the installation area. The image source is installed inside the optical engine housing and emits light to the lens. The light passes through the lens to form image light, which is then emitted through the light-transmitting aperture. The reflective structure is connected to the outer surface of the optical engine housing, and when the reflective structure is connected to the optical engine housing, it covers the sensor and the light-transmitting aperture within the installation area. The processor is electrically connected to the sensor. The processor adjusts the image light based on information identified by the sensor. The reflective structure reflects the image light so that the emission direction of the image light is different from the direction directly emitted by the optical engine.

[0005] In this embodiment, when the reflective structure is not connected to the optical engine, the optical engine in the projection system can directly emit image light from the lens, causing the image light to form an image in front of the lens. A sensor can be used to detect the environment in which the optical engine is located. For example, the sensor can be an ambient light sensor. In a bright environment, the ambient light sensor detects high ambient light intensity, and the optical engine automatically increases its output brightness to ensure a clear and distinguishable image. In a dark environment, the ambient light sensor detects low ambient light, and the optical engine reduces its brightness to avoid excessively glaring light from the projected image.

[0006] For example, a proximity sensor can detect whether a child, pet, or object is approaching the optical engine. When the proximity sensor receives a signal that an object is approaching, the processor can receive the signal and control the optical engine to automatically reduce its brightness or stop operating to prevent burns or equipment damage. The proximity sensor can also determine whether the optical engine has been moved (e.g., by detecting unauthorized handling), triggering an alarm or locking the system.

[0007] When a reflective structure is connected to an optomechanical system, the sensor can be covered by the reflective structure. For example, when the sensor is an ambient light sensor, being covered by the reflective structure allows it to detect that the ambient light level is close to zero and send a signal to the processor. Alternatively, when the sensor is a proximity sensor, it detects the approach of the reflective structure and sends a signal to the processor. The processor can then adjust the light from the optomechanical system. Adjusting the projection direction of the projection system allows the projected image to be displayed outside the vehicle or other means of transportation, enabling users to view the projected image from outside the vehicle, which is convenient for 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.

[0008] In the projection system provided in this application embodiment, the reflective structure can directly identify the usage scenario of the projection system using sensors on the optical engine. The sensors can identify the external environment of the optical engine when it is used alone, and also identify the installation of the reflective structure when the optical engine and the reflective structure are used together. This allows the optical engine to automatically adjust the projected image, enabling the projected image to adapt to changes in the projection position. In actual use, the user only needs to connect the reflective structure to the optical engine, which can automatically identify the installation of the reflective structure and adaptively adjust the image. When adjusting the usage mode of the projection system, the user does not need to perform any operations other than installing the reflective structure, thus simplifying the scene switching operation of the projection system and optimizing the user experience.

[0009] In one possible implementation, the processor is used to adjust the light emitted by the image source based on the information identified by the sensor, thereby adjusting the front orientation of the projected image formed by the image light.

[0010] In this embodiment, when the sensor does not detect any reflection covering the structure, the optical engine can project an image forward. In this case, the position of the projected image can be opposite to the light-emitting surface of the optical engine. The projection system can then be used in in-vehicle projection scenarios. For example, the projected image can be positioned in front of the rear seats, allowing rear passengers to view it. The projected image can be video, games, or other information for entertainment and leisure for the rear passengers.

[0011] When the sensor detects that the optical engine is covered by a reflective structure, the optical engine can project an image in the opposite direction. The reflective structure projects light rays emitted from the optical engine's output surface in a direction away from the output surface. The sensor can send signals to the processor, which, upon receiving these signals, can automatically control the direction of the image emitted by the image source. For example, when the optical engine transmits light backward and images onto a transmissive screen, the image source can mirror the image so that after the image light is imaged on the transmissive screen, the user can observe a forward-facing image on the side of the transmissive screen away from the optical engine.

[0012] When changing the usage scenario of the projection system, users no longer need to manually mirror the projected image after the reflective structure is installed. This simplifies the user experience, eliminates the need for users to learn the image adjustment process of the optical engine, and enhances the ease of use.

[0013] In one possible implementation, the processor is used to adjust the light emitted from the image source based on the information identified by the sensor, thereby adjusting the edge position of the projected image formed by the image light.

[0014] In this embodiment, when the image light passing through the reflective structure causes trapezoidal distortion on the transmissive screen, the projected image can be corrected to a rectangle by adjusting the edge position (such as the independent displacement of the four corners), thus preventing the image observed by the user from being stretched or compressed.

[0015] In addition, precise alignment of the projected image with the screen edge eliminates distracting black borders, providing a borderless visual immersion, especially when playing movies or presentations.

[0016] In one possible implementation, the processor is used to adjust the focal length of the lens based on the information identified by the sensor, thereby adjusting the sharpness of the projected image formed by the image light.

[0017] In this embodiment, when the distance between the projector and the screen is fixed, the relative position of the lens group within the optical engine needs to be adjusted to achieve clear focus. The optical engine provided in this embodiment can automatically adjust the focal length when connected to a reflective structure, eliminating the need for the user to judge the sharpness with their naked eye. This avoids the impact of human visual perception deviation on the clarity of the projected image. The optical engine automatically adjusts the angle to keep the image sharpness within the optimal range, improving the user experience.

[0018] In one possible implementation, the processor is used to acquire the time interval during which the sensor is covered, and when the time interval is less than a first preset time, controls the projected image of the optical engine to be located at a first position. The processor is also used to identify the time interval during which the sensor is covered, and when the time interval is greater than the first preset time, the processor adjusts the projected image of the optical engine according to the information identified by the sensor, so that the projected image is located at a second position, which is different from the first position.

[0019] In this embodiment, the sensor can essentially confirm that the reflective structure is connected to the optical engine housing when the coverage time exceeds a certain value, and the processor can determine that the optical engine is covered by the reflective structure. This avoids the situation where the projected image of the optical engine is momentarily adjusted due to a momentary accidental touch of the sensor, thus preventing it from matching the position of the screen receiving the forward projection of the optical engine.

[0020] In one possible implementation, the first preset time ranges from 2 seconds to 5 seconds.

[0021] In this embodiment, during actual use, the sensor may be obstructed by passengers or moving objects. Since passengers will normally be in their usual seating positions after adjusting their positions, even if the sensor is obstructed by passengers or objects, they will generally move away from the sensor after adjusting their positions. This process usually takes less than 2 seconds in actual use. The first preset time is defined as 2 seconds. The processor can determine that the reflective structure is connected to the optomechanism if the sensor is obstructed for two seconds or more. At this point, the direction, distortion, and focal length of the projected image are adjusted to improve the accuracy of scene switching.

[0022] In one possible implementation, there are at least two sensors, namely a first sensor and a second sensor, which are spaced apart. When the first sensor and the second sensor are covered together, the reflective structure is detected to be connected to the optical engine housing. The processor adjusts the image light according to the information detected by the first sensor and the second sensor to adjust the projected image of the optical engine.

[0023] In this embodiment, a single sensor may output incorrect data due to interference or malfunction. By setting up multiple sensors to provide independent data sources and using cross-validation, the probability of false judgment is reduced. This prevents the projected image of the optical engine from being momentarily adjusted when a sensor is accidentally touched, thus avoiding mismatch between the position of the screen receiving the forward projection from the optical engine and the actual position of the screen.

[0024] In one possible implementation, the first sensor is an ambient light sensor, and the second sensor is a proximity sensor.

[0025] In this embodiment, sensors of the same type may experience the same malfunctions in the same operating environment, thus the same sensors are prone to inaccurate identification feedback simultaneously. Using two different sensors for identification can avoid the same perceptual defects of a single type of sensor, improve the accuracy of determining whether the reflective structure is connected to the optical engine, and then adjust the direction, distortion, and focal length of the projected image to improve the accuracy of scene switching.

[0026] In one possible implementation, both the first sensor and the second sensor are ambient light sensors, or both the first sensor and the second sensor are proximity sensors.

[0027] In one possible implementation, the reflective structure is provided with a first magnetic element, and the optomechanical housing is provided with a second magnetic element. The second magnetic element is located in the mounting area, and the first magnetic element and the second magnetic element are magnetically attracted to each other. The reflective structure and the optomechanical housing can be detachably connected by magnetic attraction.

[0028] In this embodiment, the reflective structure can be magnetically connected to the optical engine housing. The reflective structure can be directly aligned with the optical engine housing through magnetic attraction; the user simply needs to bring the reflective structure close to the housing, and the reflective structure and housing will automatically align, making the installation process easier and improving the user experience.

[0029] Furthermore, the first magnetic component can be installed inside the reflective structure, and the second reflective component can be installed inside the optical engine housing, or flush with the outer surface of the optical engine housing. No exposed interfaces are required on the reflective structure or the external surface of the optical engine housing, thus resulting in a simpler overall appearance.

[0030] In one possible implementation, the reflective structure is provided with a first limiting body, the optomechanical housing is provided with a second limiting body, the second limiting body is located in the installation area, and the first limiting body and the second limiting body are detachably connected.

[0031] In one possible implementation, the reflective structure includes a reflective housing, a first reflector, and a second reflector. The reflective housing has a receiving space, an entrance aperture, and an exit aperture. The entrance aperture connects the receiving space and the outside of the reflective housing. The exit aperture is spaced apart from the entrance aperture and connects the receiving space and the outside of the reflective housing. The first reflector is mounted in the receiving space, with its first reflective surface facing the entrance aperture. The second reflector is mounted in the receiving space, spaced apart from the first reflector, with its second reflective surface facing the exit aperture. A first magnetic component is mounted on the reflective housing and surrounds the entrance aperture. The reflective housing is connected to the optical engine housing. The entrance aperture communicates with the light transmission aperture, allowing image light emitted from the lens to enter the entrance aperture and propagate towards the first reflector. The first reflector reflects the image light towards the second reflector, and the second reflector reflects the image light towards the exit aperture.

[0032] In one possible implementation, the reflective structure is slidably connected to the optical engine. When the projection system is in forward projection mode, the reflective structure can be connected outside the mounting area of ​​the optical engine. When the projection system is in reverse projection mode, the reflective structure slides into the mounting area, covering the sensor and light-transmitting aperture within the mounting area.

[0033] In this embodiment, the user only needs to slide the reflective structure to change the projection mode of the projection system. When switching the projection system to front projection mode, there is no need to disassemble and store the reflective structure. When switching the projection system to back projection mode, there is no need to find and install the reflective structure, thereby simplifying the user's operation, reducing the difficulty of switching the projection mode, and improving the user experience.

[0034] Secondly, this application also provides a reflective structure for use in the projection system described in any of the preceding claims.

[0035] Thirdly, this application also provides an optical engine for use in any of the projection systems described above.

[0036] Fourthly, this application also provides a vehicle, including a vehicle body and an optical engine as described above, the optical engine being installed inside the vehicle body.

[0037] Fifthly, this application also provides a vehicle, including a vehicle body, a reflective screen, a transmissive screen, and a projection system as described in any of the preceding claims. The reflective screen is connected to the vehicle body, the transmissive screen is connected to the rear of the vehicle body, and the projection system is installed inside the vehicle body, positioned between the reflective screen and the transmissive screen. When the projection system is in forward projection mode, the image light emitted by the optical engine propagates towards the reflective screen. When the projection system is in reverse projection mode, a reflective structure is connected to the optical engine, changing the propagation direction of the image light from the optical engine, causing the image light to propagate towards the transmissive screen.

[0038] In one possible implementation, the processor is the vehicle's central processing unit. Attached Figure Description

[0039] 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.

[0040] Figure 1 This is a schematic diagram of the vehicle provided in the embodiments of this application in the forward projection mode;

[0041] Figure 2 yes Figure 1 The diagram shows the structure of the vehicle in reverse projection mode;

[0042] Figure 3 yes Figure 2 The diagram shows a structural schematic of the projection system in reverse projection mode.

[0043] Figure 4 yes Figure 3 The diagram shows the structure of the projection system in forward projection mode;

[0044] Figure 5 yes Figure 4 A schematic cross-sectional view of the optical engine at point AA is shown.

[0045] Figure 6 yes Figure 4 A schematic diagram of the cross-section at BB of the reflective structure shown;

[0046] Figure 7 yes Figure 3 A schematic cross-sectional view of the projection system at point C;

[0047] Figure 8 yes Figure 2 The diagram shows another structural schematic of the projection system in forward projection mode;

[0048] Figure 9 yes Figure 8 The diagram shows the structure of the projection system in reverse projection mode.

[0049] Figure 10 yes Figure 2 The diagram shows another structural schematic of the projection system in forward projection mode;

[0050] Figure 11 yes Figure 10 The diagram shown is an exploded view of the projection system.

[0051] Figure 12 yes Figure 10 The diagram shows the structure of the projection system in reverse projection mode.

[0052] Figure 13 yes Figure 2 The diagram shows another structural schematic of the optical engine. Detailed Implementation

[0053] 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.

[0054] For ease of understanding, the terminology used in the embodiments of this application will be explained first.

[0055] Multiple: refers to two or more.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The specific embodiments of this application will now be clearly described in conjunction with the accompanying drawings.

[0060] Please see Figure 1 , Figure 1 This is a structural schematic diagram of the vehicle 1000 provided in the embodiments of this application in a forward projection mode. The vehicle 1000 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 1000 as an example.

[0061] Please refer to the following: Figure 1 and Figure 2 , Figure 2 yes Figure 1 The diagram shows the structure of the vehicle 1000 in reverse projection mode.

[0062] The vehicle 1000 includes a vehicle body 100, a reflective screen 200, a transmissive screen 300, and a projection system 400. The reflective screen 200, the transmissive screen 300, and the projection system 400 can all be mounted on the vehicle body 100. The reflective screen 200 receives image light from the projection system 400 in forward projection mode to form an image. The transmissive screen 300 receives image light from the projection system 400 in reverse projection mode to form an image.

[0063] in, Figure 1 The X direction shown is the width direction of vehicle 1000. Figure 1 In the diagram, the Y direction represents the length of vehicle 1000. Figure 1 In the diagram, the Z direction represents the altitude of the vehicle at 1000.

[0064] It should be noted that, Figure 1 and Figure 2 The purpose is merely to illustratively describe the connection relationship between the vehicle body 100, the reflective screen 200, the transmissive screen 300, and the projection system 400, 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 1000. In other embodiments of this application, the vehicle 1000 may include... Figure 1 This may involve more or fewer components, or combining certain components, or splitting certain components, or different component arrangements.

[0065] The vehicle body 100 includes a body support frame 10 and a door 20. The body support frame 10 is the basic load-bearing structure of the vehicle body 100. The door 20 is connected to the body support frame 10 and can be opened and closed relative to the body support frame 10.

[0066] The vehicle body support 10 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 100. For example, the material of the vehicle body support 10 may include high-strength steel or aluminum alloy, and the various parts of the vehicle body support 10 can be welded or riveted to form a rigid frame.

[0067] The door 20 can be rotatably connected to the body support 10. For example, when the door 20 is a side door, it can be connected to a pillar (such as an A-pillar or B-pillar) of the body support 10 via a hinge. Alternatively, when the door 20 is a tailgate, it can be connected to the rear crossbeam or an extension of the rear longitudinal beam of the body support 10 via a hinge. The hinge provides a pivot, allowing the door 20 to open outwards or slide about the pivot. The following description, along with the accompanying drawings, uses the example of the door 20 being a tailgate.

[0068] Please refer to the following: Figure 1The reflective screen 200 can be attached to the interior of the vehicle. The reflective screen 200 can be attached to the roof of the vehicle body support 10. The reflective screen 200 can be unfolded when in use. When unfolded, the reflective screen 200 can be positioned between the driver's seat and the rear passengers. The reflective screen 200 can be rolled up when not in use. Alternatively, the reflective screen 200 can be removed from the roof of the vehicle when not in use, avoiding obstructing passenger movement space.

[0069] The surface of the reflective screen 200 can be enhanced with special coatings (such as glass beads, metal particles, and optical microstructures) to improve light reflection efficiency, thereby increasing screen brightness, contrast, and color saturation. The reflective screen 200 can also reduce light scattering, preventing the projected image from appearing grayish or discolored.

[0070] Please refer to the following: Figure 2 The projection screen 300 can be connected to the vehicle door 20. Specifically, the projection screen 300 can be connected to the side of the vehicle door 20 facing inwards. When in use, the vehicle door 20 is open relative to the vehicle body support 10, and the projection screen 300 unfolds vertically. When not in use, the projection screen 300 can be rolled up. Alternatively, the projection screen 300 can be detached from the vehicle door 20 and stored in the trunk of the vehicle 1000. In this embodiment, the vehicle door 20 is the vehicle's trunk door, which provides a large space when opened, allowing the projection screen 300 to offer a wider field of view and a more immersive viewing experience.

[0071] In this embodiment, the image light emitted by the projection system 400 is projected onto the transmissive screen 300. After passing through the transmissive screen 300, a clear image is formed on the other side of the transmissive screen 300 for the user to view. For example, the transmissive screen 300 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.

[0072] Viewers can watch the projected image from the other side of the transmissive screen 300. The projection system 400 can be installed inside the vehicle 1000, and users can use the projection system 400 from outside the vehicle. Users are not limited to the small space inside the vehicle, which improves the comfort and concentration of users when watching movies.

[0073] Figure 3 yes Figure 2 The diagram shows a structural schematic of the projection system 400 in reverse projection mode. Figure 4 yes Figure 3The diagram shows the structure of the projection system 400 in forward projection mode. The projection system 400 includes an optical engine 410, a reflective structure 420, and a processor 415. The optical engine 410 is detachably connected to the reflective structure 420. The optical engine 410 emits image light. The reflective structure 420 can change the propagation direction of the image light. The processor 415 is electrically connected to the optical engine 410. The processor 415 is used to adjust the image light emitted by the optical engine 410.

[0074] The projection system 400 includes both forward projection mode and reverse projection mode. For example... Figure 1 and Figure 4 When the projection system 400 is in forward projection mode, the reflective structure 420 is not connected to the optical engine 410, and the optical engine 410 can be used independently. The optical engine 410 can emit image light to the reflective screen 200.

[0075] like Figure 2 and Figure 3 When the projection system 400 is in reverse projection mode, the reflection structure 420 is connected to the light-emitting position of the optical engine 410. The reflection structure 420 changes the propagation direction of the image light of the optical engine 410, and the image light propagates to the transmissive screen 300 so that the image light can be projected on the transmissive screen 300 to provide image information to the user.

[0076] Please refer to the following: Figure 4 and Figure 5 , Figure 5 yes Figure 4 The diagram shows a cross-sectional view of the optical engine 410 at point AA. The optical engine 410 includes an optical engine housing 411, an image source 412, a lens 413, a sensor 414, and a second magnetic component 416. The image source 412 and lens 413 are mounted inside the optical engine housing 411. The image source 412 emits light to the lens 413. The lens 413 can transform and modulate the light to form image light. The sensor 414 is electrically connected to the processor 415. The sensor 414 can detect the surrounding environment in real time, and the processor 415 can automatically adjust the parameters of the optical engine based on the recognition information from the sensor 414. The types and functions of the sensor 414 will be illustrated below. The second magnetic component 416 is connected to the optical engine housing 411. The second magnetic component 416 is used for detachable connection with the reflective structure 420.

[0077] Specifically, the optical engine housing 411 has a receiving cavity 4111 and a light-transmitting hole 4112. The light-transmitting hole 4112 is recessed from the outer surface of the optical engine housing 411 and communicates the receiving cavity 4111 with the outside of the optical engine housing 411. The outer surface of the optical engine housing 411 has a mounting area 4113, which surrounds the light-transmitting hole 4112.

[0078] Lens 413 is installed inside housing cavity 4111. The light-emitting surface 4131 of lens 413 faces light-transmitting aperture 4112. Lens 413 of optical engine 410 faces reflective screen 200.

[0079] In this embodiment, the lens 413 is composed of multiple lenses. Through the refraction of the lenses, the light is transformed and modulated so that the light propagates along a predetermined path.

[0080] Sensor 414 is mounted on the optical engine housing 411 and located within the mounting area 4113. Sensor 414 is exposed relative to the outer surface of the optical engine housing 411. Exemplarily, sensor 414 may be mounted on the outer surface of the optical engine housing 411. Alternatively, the optical engine housing 411 may have a receiving groove (not shown) for sensor 414. The receiving groove is recessed from the outer surface of the optical engine housing 411. Sensor 414 is disposed within the receiving groove. Sensor 414 is electrically connected to processor 415.

[0081] In this embodiment, sensor 414 can be used to detect the environment in which the optical engine 410 is located. For example, sensor 414 can be an ambient light sensor. In a bright environment, the ambient light sensor will detect high ambient light intensity, and the optical engine 410 will automatically increase the output brightness to ensure that the image is clearly distinguishable. In a dark room environment, the ambient light sensor will detect that the external ambient light is dim, and the optical engine 410 will reduce the brightness to avoid excessive glare from the brightness projected by the optical engine 410.

[0082] For example, sensor 414 is a proximity sensor. A proximity sensor is a sensor device used to detect when a person or object is approaching a subject; it can be an infrared, ultrasonic, or optical sensor. The proximity sensor can detect whether a person, pet, or object is approaching the optomechanical unit 410. When the proximity sensor detects that an object is approaching, the processor 415 can control the optomechanical unit 410 to automatically reduce its brightness or stop operating based on the proximity sensor's identification information to prevent burns or equipment damage. The proximity sensor can also determine whether the optomechanical unit 410 has been moved (e.g., unauthorized handling is detected), triggering an alarm or locking system. The proximity sensor can be an infrared sensor, an ultrasonic sensor, an optical ToF sensor, etc.

[0083] Please refer to the following: Figure 4 The second magnetic element 416 is mounted in the mounting area 4113 of the optical engine housing 411. For example, the second magnetic element 416 may protrude from the surface of the optical engine housing 411. Alternatively, the second magnetic element 416 may be embedded in the mounting area 4113 of the optical engine housing 411. Or, the second magnetic element 416 may be mounted within the receiving cavity 4111 of the optical engine housing 411 and disposed around the periphery of the light-transmitting hole 4112. This application does not specifically limit the mounting position of the second magnetic element 416.

[0084] Please refer to the following: Figure 1 , Figure 2 and Figure 5 The optical engine 410 can be located between the transmissive screen 300 and the reflective screen 200, with the light-transmitting aperture 4112 of the optical engine housing 411 facing the reflective screen 200. The optical engine housing 411 can be connected to the roof area of ​​the vehicle body support 10 so that the optical engine 410 can maintain a stable relative position with the vehicle body 100. When passengers inside the vehicle use the projection system 400 to view images, the optical engine 410 will not shake relative to the vehicle body 100, thus allowing passengers to observe a stable and unshaking image.

[0085] In this embodiment, when the reflective structure 420 is not connected to the optical engine 410, the sensor 414 can still receive external light or light projected onto the reflective screen 200 normally. At this time, the processor 415 can obtain the recognition information of the sensor 414, and while adjusting the intensity of the image light, it can also determine that the projection system 400 is in the forward projection mode.

[0086] Please refer to the following: Figure 1 and Figure 4 When the sensor 414 does not detect that the reflection structure 420 is covered, the optomechanical system 410 can project an image in the forward direction. The projection system 400 can be applied in the in-vehicle projection scenario of the vehicle 1000. For example, the position of the projected image can be in front of the rear seats in the vehicle. The projected image can be viewed by the rear passengers. The projected image can be video or games and other information that can entertain and relax the rear passengers.

[0087] Please see Figure 6 , Figure 6 yes Figure 4 The diagram shows a cross-sectional view of the reflective structure 420 at point BB. The reflective structure 420 includes a reflective housing 421, a first reflector 422, a second reflector 423, and a first magnetic element 424. The first reflector 422 and the second reflector 423 are both installed inside the reflective housing 421. The first reflector 422 and the second reflector 423 can change the propagation direction of the image light from the optical engine 410 after the reflective structure 420 is connected to the optical engine 410. The first magnetic element 424 is connected to the reflective housing 421. The first magnetic element 424 allows for a detachable connection between the reflective housing 421 and the optical engine 410.

[0088] Specifically, the reflector housing 421 has a mounting surface 4211. The mounting surface 4211 is used to face the optomechanism 410 when the reflector structure 420 is connected to the optomechanism 410.

[0089] The reflector housing 421 may be provided with a receiving space 4212, a light entrance hole 4213, and a light exit hole 4214. The light entrance hole 4213 and the light exit hole 4214 both penetrate the mounting surface 4211 of the reflector housing 421 and communicate with the receiving space 4212.

[0090] A first reflector 422 is mounted within a receiving space 4212. The first reflective surface 4221 of the first reflector 422 faces the light entrance aperture 4213. For example, the first reflector 422 may be a plane mirror.

[0091] The second reflector 423 is installed within the receiving space 4212. The second reflective surface 4231 of the second reflector 423 faces the light exit hole 4214. For example, the second reflector 423 can be a plane mirror. The second reflector 423 is capable of receiving light reflected by the first reflector 422 and reflecting the light towards the light exit hole 4214.

[0092] The first magnetic element 424 is connected to the housing and exposed relative to the mounting surface 4211. For example, the first magnetic element 424 may be annular. The first magnetic element 424 may be arranged around the light entrance aperture 4213.

[0093] Please refer to the following: Figure 5 , Figure 6 and Figure 7 , Figure 7 yes Figure 3 The diagram shows a cross-sectional view of the projection system 400 at point C. When the projection system 400 needs to be adjusted to reverse projection mode, the user can connect the reflective structure 420 to the optical engine 410. The first magnetic element 424 of the reflective structure 420 is magnetically attracted to the second magnetic element 416 of the optical engine 410. The mounting surface 4211 of the reflective element housing 421 of the reflective structure 420 covers the mounting area 4113 of the optical engine housing 411. The light entrance hole 4213 of the reflective element housing 421 communicates with the light transmission hole 4112 of the optical engine housing 411.

[0094] The mounting surface 4211 may partially cover the mounting area 4113 of the optical engine housing 411, or the mounting surface 4211 may completely cover the mounting area 4113 of the optical engine housing 411, but the mounting surface 4211 shall at least cover the sensor 414 located in the mounting area 4113.

[0095] In this embodiment, the reflective structure 420 can be magnetically connected to the optical engine housing 411 of the optical engine 410. The reflective structure 420 can be directly aligned with the optical engine housing 411 by magnetic attraction. The user only needs to bring the reflective structure 420 close to the optical engine housing 411, and the reflective structure 420 and the optical engine housing 411 will automatically align, making the installation process of the reflective structure 420 easier and improving the user experience.

[0096] Furthermore, the first magnetic component 424 can be installed inside the reflective structure 420, and the second reflective component 423 can be installed inside the optical engine housing 411 of the optical engine 410, or flush with the outer surface of the optical engine housing 411 of the optical engine 410. No exposed interfaces are required on the exterior of the reflective structure 420 and the optical engine housing 411, thus resulting in a simpler appearance for both.

[0097] In some other embodiments, the reflective structure 420 and the optomechanical system 410 can also be detachably connected by means other than magnetic attraction. For example, the reflective structure 420 is provided with a first limiting body (not shown). The optomechanical housing 411 is provided with a second limiting body (not shown), located in the mounting area 4113. The first and second limiting bodies can engage and mutually limit each other, achieving a detachable connection between the reflective structure 420 and the optomechanical system 410.

[0098] Please refer to the following: Figure 8 and Figure 9 , Figure 8 yes Figure 2 The diagram shows another structural schematic of the projection system 400 in forward projection mode. Figure 9 yes Figure 8 The diagram shows the structure of the projection system 400 in reverse projection mode. In addition to the connection methods such as magnetic connection and snap-fit, the reflective structure 420 and the optical engine 410 of the projection system 400 can also be slidably connected.

[0099] Specifically, the projection system 400 includes a slide rail 510. The slide rail 510 can be mounted on the outer surface of the optical engine housing 411. The slide rail 510 is connected to the surface of the optical engine housing 411 that has a light-transmitting hole 4112. The slide rail 510 can extend along the X direction. For example, there can be two slide rails 510. The two slide rails 510 can be located on opposite sides of the light-transmitting hole 4112 along the Z direction.

[0100] The reflective structure 420 also includes a slider (not shown). The slider can be connected to the mounting surface 4211 of the reflective housing 421 of the reflective structure 420. The slider is slidably connected to the slide rail 510. The slider can slide along the slide rail 510 in the X direction. For example, there can be two sliders. The two sliders can be located on opposite sides of the entrance aperture 4213 in the Z direction. One slider is slidably connected to one slide rail 510.

[0101] When the projection system 400 is in forward projection mode, the reflective structure 420 can be connected outside the mounting area 4113 of the optical engine 410. The reflective structure 420 does not cover the sensor 414 within the mounting area 4113 of the optical engine 410. At this time, the optical engine 410 can perform forward projection. The image light emitted by the optical engine 410 can propagate to the reflective screen 200 and form an image on the reflective screen 200.

[0102] When the projection system 400 is in reverse projection mode, the reflective structure 420 slides along the X direction to the mounting area 4113, covering the sensor 414 and the light-transmitting hole 4112 within the mounting area 4113. The reflective structure 420 reflects the image light emitted by the optical engine 410 towards the transmissive screen 300. The sensor 414 can detect that it is covered, and the processor 415 adjusts the projected image of the optical engine 410 based on the recognition information from the sensor 414.

[0103] In this embodiment, the user only needs to slide the reflective structure 420 to change the projection mode of the projection system 400. When changing the projection system 400 to the forward projection mode, there is no need to disassemble and store the reflective structure 420. When changing the projection system 400 to the reverse projection mode, there is no need to find and install the reflective structure 420, thereby simplifying the user's operation, reducing the difficulty of switching the projection mode of the projection system 400, and improving the user experience.

[0104] For some other possible implementations, please refer to [the relevant documentation]. Figure 10 , Figure 11 and Figure 12 , Figure 10 yes Figure 2 The diagram shows another structural schematic of the projection system 400 in forward projection mode. Figure 11 yes Figure 10 An exploded view of the projection system 400 shown. Figure 12 yes Figure 10 The diagram shows the structure of the projection system 400 in reverse projection mode.

[0105] Specifically, the outer surface of the optical engine housing 411 includes a first surface 411a, a second surface 411b, and a connecting surface 411c. The first surface 411a and the second surface 411b are arranged opposite to each other along the Z direction. The connecting surface 411c connects the first surface 411a and the second surface 411b. The first surface 411a can be the surface of the optical engine housing 411 facing the roof of the vehicle. The second surface 411b can be the surface of the optical engine housing 411 facing the bottom of the vehicle. The connecting surface 411c can be the surface of the optical engine 410 where the light-transmitting hole 4112 is located.

[0106] The projection system 400 includes a slide rail 510. The slide rail 510 includes a first segment 511 and a second segment 512 that are bent and connected. The first segment 511 is connected to a first surface 411a of the optical engine housing 411 and extends along the Y direction. The second segment 512 is connected to a connecting surface 411c and extends along the Z direction. The first segment 511 and the second segment 512 can have a smooth transition. For example, there can be two slide rails 510. The two slide rails 510 can be located on opposite sides of the light-transmitting aperture 4112 along the X direction.

[0107] The reflective structure 420 also includes a slider 520. The slider 520 can be connected to the mounting surface 4211 of the reflective housing 421 of the reflective structure 420. The slider 520 is slidably connected to a slide rail 510. The slider 520 can slide along the slide rail 510. For example, there can be two sliders 520. The two sliders 520 can be located on opposite sides of the entrance aperture 4213 along the Z direction. One slider 520 is slidably connected to one slide rail 510.

[0108] When the projection system 400 is in forward projection mode, the reflective structure 420 can be connected outside the mounting area 4113 of the optical engine 410. The reflective structure 420 can be connected to the first surface 411a of the optical engine housing 411. The slider 520 can be connected to the first section 511 of the slide rail 510. The reflective structure 420 does not cover the sensor 414 within the mounting area 4113 of the optical engine 410. At this time, the optical engine 410 can perform forward projection. The image light emitted by the optical engine 410 can propagate to the reflective screen 200 and form an image on the reflective screen 200.

[0109] When the projection system 400 is in reverse projection mode, the reflective structure 420 slides along the slide rail 510 to the mounting area 4113. The reflective structure 420 can be connected to the connecting surface 411c of the optical engine housing 411. The slider 520 is connected to the second section 512 of the slide rail 510. The reflective structure 420 can cover the sensor 414 and the light-transmitting hole 4112 within the mounting area 4113. The reflective structure 420 can reflect the image light emitted by the optical engine 410 towards the transmissive screen 300. The sensor 414 can detect that it is covered, so that the processor 415 adjusts the projected image of the optical engine 410 according to the recognition information of the sensor 414.

[0110] Please refer to the following: Figure 5 , Figure 6 and Figure 7Image source 412 emits light, which passes through lens 413 to form image light. The image light exits through light-transmitting hole 4112, enters receiving space 4212 through light-entry hole 4213, and propagates towards first reflector 422. First reflector 422 reflects the image light emitted by lens 413, causing it to propagate towards second reflector 423. Second reflector 423 further adjusts the propagation direction of the image light, allowing it to exit reflector housing 421 through light-exit hole 4214 and propagate towards the side of optical engine housing 411 away from lens 413, thus reaching transmissive screen 300. In other words, reflective structure 420 propagates image light from optical engine 410 to transmissive screen 300, which receives the image light and displays an image. Users can view the image on transmissive screen 300 in the external environment of vehicle 1000.

[0111] In this embodiment, when the reflective structure 420 is connected to the optomechanical system 410, the sensor 414 is located in the mounting area 4113, and the reflective structure 420 is in contact with the mounting area 4113, allowing the sensor 414 to be covered by the reflective structure 420. Alternatively, when the reflective structure 420 is close to but not in contact with the mounting area 4113, the sensor 414 can sense changes in the external environment. When the sensor 414 detects a change in the external environment (when the sensor is covered), the processor 415 can adjust the projected image of the optomechanical system 410 based on the detection information from the sensor 414.

[0112] The communication methods between the processor 415 and the sensor 414 include at least two. In one possible implementation, the sensor 414 can send a signal to the processor 415, and the processor 415 receives the signal from the sensor 414 to adjust the image light of the optical engine 410 so that the front of the projected image on the transmissive screen 300 can face the rear of the vehicle 1000 for viewing by a user located on the side of the transmissive screen 300 away from the projection system 400.

[0113] In some other possible implementations, the processor 415 can also actively acquire the identification information of the sensor 414 without the sensor 414 sending a signal to the processor 415. For example, when the sensor 414 detects a change in the external environment (when the sensor 414 is covered), the processor 415 can directly acquire the identification information of the sensor 414 to adjust the projected image of the optical engine 410.

[0114] The following description uses the example of sensor 414 sending signals to processor 415 as an example, but it should be understood that the communication method between processor 415 and sensor 414 is not limited to this.

[0115] When sensor 414 is an ambient light sensor, after being covered by reflective structure 420 (reflective housing 421 and optomechanical housing 411 are fully connected; or, there is a certain gap between reflective housing 421 and optomechanical housing 411, but it does not affect the magnetic connection between the two), the ambient light sensor detects that the brightness of the surrounding ambient light has darkened or even approached zero. Sensor 414 can send a signal to processor 415, indicating that reflective structure 420 and optomechanical 410 are connected.

[0116] In another embodiment, when sensor 414 is a proximity sensor, the proximity sensor is located in mounting area 4113, and reflective structure 420 is connected to mounting area 4113. The proximity sensor detects that reflective structure 420 is approaching and sends a signal to processor 415. This indicates that reflective structure 420 is connected to optomechanical system 410.

[0117] In the projection system 400 provided in this embodiment, the reflective structure 420 can directly identify the usage mode of the projection system 400 using the sensor 414 on the optical engine 410. The sensor 414 can identify the external environment of the optical engine 410 when it is used alone, and it can also identify the installation of the reflective structure 420 when the optical engine 410 is used in conjunction with the reflective structure 420, so that the optical engine 410 automatically adjusts the projected image, thereby allowing the projected image to adapt to changes in the projection position. In actual use, the user only needs to connect the reflective structure 420 to the optical engine 410, and the optical engine 410 can automatically identify the installation of the reflective structure 420 and adaptively adjust the image. When adjusting the usage mode of the projection system 400, the user does not need to perform any operations other than installing the reflective structure 420, thus simplifying the scene switching operation of the projection system 400 and optimizing the user experience.

[0118] For one possible implementation, please refer to Figure 13 , Figure 13 yes Figure 2 The diagram shows another structural schematic of the optomechanical system 410. The number of sensors 414 is at least two, namely a first sensor 4141 and a second sensor 4142. The first sensor 4141 and the second sensor 4142 are spaced apart. The first sensor 4141 and the second sensor 4142 can be located on opposite sides of the light-transmitting aperture 4112. For example, both the first sensor 4141 and the second sensor 4142 are ambient light sensors, or both are proximity sensors. Alternatively, the first sensor 4141 is an ambient light sensor, and the second sensor 4142 is a proximity sensor.

[0119] When the first sensor 4141 detects that it is covered, it sends a first signal to the processor 415. When the second sensor 4142 detects that it is covered, it sends a second signal to the processor 415. After receiving the first and second signals, the processor 415 adjusts the projected image of the optical engine 410. That is, when both the first sensor 4141 and the second sensor 4142 are covered, the processor 415 adjusts the image light according to the information detected by the first sensor 4141 and the second sensor 4142, thereby adjusting the projected image of the optical engine 410.

[0120] In this embodiment, a single sensor 414 may output incorrect data due to interference or malfunction. By setting up multiple sensors 414 to provide independent data sources, the probability of false judgment is reduced through cross-validation. This avoids the situation where the projected image of the optical engine 410 is momentarily adjusted when a sensor 414 is accidentally touched, thus failing to match the position of the screen receiving the forward projection of the optical engine 410.

[0121] Furthermore, sensors 414 of the same type may experience the same malfunctions in the same operating environment, and identical sensors 414 are prone to inaccurate recognition feedback simultaneously. Using two different sensors 414 for recognition can avoid the same perceptual defects of a single type of sensor 414, improve the accuracy of determining whether the reflective structure 420 is connected to the optical engine 410, and then adjust the direction, distortion, and focal length of the projected image to improve the accuracy of scene switching.

[0122] The processor 415 can adjust the orientation of the projected image based on the signal emitted by the sensor 414 when it detects that the brightness detected by the sensor 414 is close to 0. Here, the orientation of the projected image refers to the orientation of the information on the projected screen that conforms to the user's viewing habits. For example, the orientation of the font structure refers to the orientation in which the user can read it normally when facing forward.

[0123] In this embodiment, when sensor 414 detects that the light source is covered by reflective structure 420, reflective structure 420 can project the light emitted from the light-emitting surface 4131 of optical engine 410 in a direction away from the light-emitting surface 4131. Sensor 414 can send a signal to processor 415, and processor 415 can automatically adjust the direction of the light emitted from image source 412 upon receiving the signal from sensor 414. For example, when optical engine 410 transmits backward and images are formed on transmissive screen 300, image source 412 can mirror-flip the image information carried by the light (flipping the vertical position and the horizontal position), so that after the image light passing through lens 413 is formed on transmissive screen 300, the user can observe a forward-projected image on the side of transmissive screen 300 away from optical engine 410.

[0124] When changing the usage scenario of the projection system 400, users do not need to manually mirror the projected image after installing the reflective structure 420. This simplifies the user's operation, avoids the need for users to learn the image adjustment process of the optical engine 410, and improves the user's ease of use.

[0125] In one possible implementation, the processor 415 can adjust the edge position of the image information carried by the light from the image source 412 according to the signal emitted by the sensor 414, so that the processor 415 can perform distortion correction on the projected image. In practical use, pre-calibrated distortion correction parameters can be loaded. When the projection system 400 switches from forward projection mode to reverse projection mode, the processor 415 can adjust the projected image on the transmissive screen 300 according to the preset distortion correction parameters.

[0126] In this embodiment, when the image light passing through the reflection structure 420 causes trapezoidal distortion on the image on the transmissive screen 300, the projected image on the transmissive screen 300 can be corrected to be rectangular by adjusting the boundary position of the light emitted by the image source 412 (such as the independent displacement of the four corners), thus preventing the image observed by the user from being stretched or compressed.

[0127] In addition, precise alignment of the projected image with the edge of the transmissive screen 300 eliminates distracting black borders, providing a borderless visual immersion, especially when playing movies or presentations.

[0128] In one possible implementation, the processor 415 can control the focal length of the lens 413 based on the signal emitted by the sensor 414.

[0129] In this embodiment, when the distance between the optical engine 410 and the transmissive screen 300 is fixed, the relative positions of multiple lenses within the lens 413 of the optical engine 410 need to be adjusted to adjust the focal length so that the light is focused to form a clear image. The optical engine 410 provided in this embodiment can automatically adjust the focal length when connected to the reflective structure 420, eliminating the need for the user to judge the sharpness with their naked eye, thereby avoiding the impact of human visual observation deviation on the clarity of the projected image. The optical engine housing 411 of the optical engine 410 can also automatically adjust the angle (the angle of the image light of the optical engine 410 relative to the vehicle frame 10) to keep the clarity of the projected image within the optimal range, improving the user experience.

[0130] To improve the accuracy of the processor 415 in determining the operating mode of the projection system 400, this application also provides an example of the software algorithm of the processor 415.

[0131] In one possible implementation, when the time interval during which the sensor 414 is covered is less than a first preset time, the projected image of the optical engine 410 is located at a first position. At this time, the first position is the location of the reflective screen 200.

[0132] When the processor 415 detects that the sensor 414 has been covered for more than a first preset time, the processor 415 adjusts the projected image of the optical engine 410 according to the signal from the sensor 414, so that the projected image is located in a second position, which is different from the first position. At this time, the second position is the location of the transmissive screen 300.

[0133] In this embodiment, when the sensor 414 is covered for a certain period of time, it can basically confirm that the reflective structure 420 is connected to the optical engine housing 411, and the processor 415 can determine that the optical engine 410 is covered by the reflective structure 420. This avoids the situation where the projected image of the optical engine 410 is momentarily adjusted due to a momentary accidental touch of the sensor 414, thus failing to match the position of the screen receiving the forward projection of the optical engine 410.

[0134] In one possible implementation, the first preset time ranges from 2 seconds to 5 seconds. For example, the first preset time can also be 2 seconds, 3 seconds, or 5 seconds.

[0135] In actual use, sensor 414 may be obstructed by passengers or moving objects. Since passengers will normally be in their usual seating positions after adjusting their positions, even if sensor 414 is obstructed, the passengers or objects will generally move away from around sensor 414 after adjusting their positions. This process usually takes less than 5 seconds in actual use. The first preset time is defined as 5 seconds. Processor 415 can determine if reflective structure 420 is connected to optical engine 410 if sensor 414 is obstructed for 5 seconds or more. At this time, it adjusts the direction, distortion, and sharpness of the projected image to improve the accuracy of scene switching. Processor 415 can also automatically adjust the brightness, contrast, and other optical parameters of the projected image.

[0136] For example, processor 415 may be installed inside optical engine 410. Alternatively, processor 415 may be a central processing unit (CPU) inside vehicle body 100.

[0137] In this embodiment, the processor 415 can be an existing component on the vehicle 1000. The processor 415 can determine the projection mode required by the projection system 400 through the recognition signal of the sensor 414, and realize the switching of the projection mode of the projection system 400 without increasing the cost and space occupancy of the projection system 400.

[0138] This embodiment of the application adjusts the position of the sensor 414 and sets the recognition method of the sensor 414 signal by the processor 415. The existing sensor 414 on the optical engine 410 can be used directly to recognize the projection scene without adding additional sensors, recognition devices or circuit boards for connection. Therefore, it does not increase the cost and structural complexity of the projection system 400, avoids the problem of mismatch due to the overly complex structure of the projection system 400, and improves the reliability of the system.

[0139] 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 system, characterized by include: An optical engine includes an optical engine housing, an image source, a lens, and a sensor. The optical engine housing has a receiving cavity and a light-transmitting aperture, the light-transmitting aperture connecting the receiving cavity to the outside of the optical engine. The outer surface of the optical engine housing has a mounting area surrounding the light-transmitting aperture. The lens is mounted inside the receiving cavity with its light-emitting surface facing the light-transmitting aperture. The sensor is mounted on the optical engine housing and located within the mounting area. The image source is mounted inside the optical engine housing and is used to emit light to the lens. The light passes through the lens to form image light, and the image light exits through the light-transmitting aperture. A reflective structure is provided for connection to the outer surface of the optomechanical housing, and when the reflective structure is connected to the optomechanical housing, the reflective structure can cover the sensor and the light-transmitting hole within the installation area; The sensor is electrically connected to the sensor and is used to send sensor-identified information to the processor. The processor is used to receive the sensor-identified information and adjust the image light. The reflective structure is used to reflect the image light so that the emission direction of the image light is different from the direction directly emitted by the optical engine.

2. The projection system of claim 1, wherein, The number of sensors is at least two, namely a first sensor and a second sensor. The first sensor and the second sensor are arranged at an interval. When the first sensor and the second sensor are covered together, the connection between the reflective structure and the optomechanical housing is detected.

3. The projection system of claim 2, wherein, The first sensor is an ambient light sensor, and the second sensor is a proximity sensor.

4. The projection system of claim 3, wherein, Both the first sensor and the second sensor are ambient light sensors, or both the first sensor and the second sensor are proximity sensors.

5. The projection system according to any of the claims 1-4, characterized in that, The reflective structure is provided with a first magnetic component, and the optical engine housing is provided with a second magnetic component. The second magnetic component is located in the mounting area. The first magnetic component and the second magnetic component are magnetically attracted to each other. The reflective structure and the optical engine housing can be detachably connected by magnetic attraction.

6. The projection system according to any one of claims 1-4, wherein, The reflective structure is provided with a first limiting body, and the optomechanical housing is provided with a second limiting body. The second limiting body is located in the installation area, and the first limiting body and the second limiting body are detachably connected.

7. The projection system of claim 5, wherein, The reflective structure includes: A reflector housing, wherein the reflector housing is provided with a receiving space, a light entrance hole and a light exit hole, the light entrance hole is connected to the receiving space and the outside of the reflector housing, the light exit hole is spaced apart from the light entrance hole, and the light exit hole is connected to the receiving space and the outside of the reflector housing; A first reflector is installed in the receiving space, and the first reflective surface of the first reflector faces the light entrance aperture. and a second reflector, the second reflector being installed in the receiving space, the second reflector being spaced apart from the first reflector, and the second reflective surface of the second reflector facing the light-emitting hole; The first magnetic component is mounted on the housing of the reflector and arranged around the light entrance hole. The housing of the reflector is connected to the optical engine housing. The light entrance hole is connected to the light transmission hole. The image light emitted from the lens can enter the light entrance hole and propagate to the first reflector. The first reflector can reflect the image light to the second reflector. The second reflector can reflect the image light to the light exit hole.

8. The projection system according to any one of claims 1-4, wherein, The reflective structure is slidably connected to the optomechanical system; When the projection system is in forward projection mode, the reflective structure can be connected outside the mounting area of ​​the optical engine; When the projection system is in reverse projection mode, the reflective structure slides to the mounting area, and the reflective structure can cover the sensor and the light-transmitting hole in the mounting area.

9. A reflective structure, characterized by Applied to the projection system according to any one of claims 1-8.

10. An optical engine characterized by, Applied to the projection system according to any one of claims 1-8.

11. A vehicle, characterized by It includes a vehicle body and an optical engine as described in claim 10, wherein the optical engine is installed inside the vehicle body.

12. A vehicle, characterized by The system includes a vehicle body, a reflective screen, a transmissive screen, and a projection system as described in any one of claims 1-8, wherein the reflective screen is connected to the vehicle body, the transmissive screen is connected to the rear of the vehicle body, the projection system is installed inside the vehicle body, and the projection system is located between the reflective screen and the transmissive screen. When the projection system is in forward projection mode, the image light emitted by the optical engine propagates toward the reflective screen; When the projection system is in reverse projection mode, the reflective structure is connected to the optical engine, and the reflective structure changes the propagation direction of the image light of the optical engine, so that the image light propagates toward the transmissive screen.

13. The vehicle of claim 12, wherein, The processor is the central processing unit of the vehicle body.

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