Projection device and vehicle

Abstract

The embodiment of the utility model belongs to the technical field of projection, and provides a projection device and a vehicle. The projection device is installed in the vehicle. The projection device comprises a light-emitting device, a light machine, a projection lens, a screen, a heat dissipation assembly, a rotating piece and a control piece. The ray machine is arranged at one end of the light emitting device with the light emitting end. The projection lens is connected with the ray machine. The projection lens faces the screen. The heat dissipation assembly is connected with the light-emitting device and the light machine. The rotating piece is installed on the vehicle. The rotating piece is rotatably connected with the vehicle. The rotating part and the control part are arranged, the control part controls the rotating part to rotate relative to the opening of the vehicle body, the air outlet channel is formed between the rotating part and the vehicle body, one end of the air outlet channel faces the heat dissipation assembly, the other end of the air outlet channel faces the outside of the vehicle, heat generated by the projection device is directly transmitted to the outside of the vehicle through the air outlet channel, and efficient heat dissipation is achieved; meanwhile, noise generated by the projection device is close to the air outlet channel, so that the noise is prevented from being transmitted into the vehicle when the vehicle is in a static state.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of projection technology. In particular, it relates to a projection device and a vehicle. Background Art

[0002] Currently, with the rapid development of automotive technology, the functions of vehicles are becoming increasingly rich. In-vehicle intelligent display has become a standard configuration for modern vehicles. At present, the in-vehicle passengers have higher and higher requirements for in-vehicle entertainment display and interaction. Compared with the traditional central control liquid crystal large screen, the in-vehicle projection device can bring a larger viewing screen for passengers.

[0003] In the prior art, the in-vehicle projection device includes a light source, an imaging system, an electronic system, and a heat dissipation system. The light source is responsible for generating the light required for projection. The imaging system includes a display chip for generating images. The electronic system includes a processor and a memory for processing input signals, generating images, and controlling various functions of the projection device. The heat dissipation system includes a heat dissipation fan for ensuring that the in-vehicle projection device does not overheat during operation.

[0004] However, the existing in-vehicle projection devices have problems of poor heat dissipation effect and high noise generated by heat dissipation. Summary of the Utility Model

[0005] The embodiments of the present application provide a projection device and a vehicle, which improve the heat dissipation efficiency of the projection device and reduce the noise generated by the heat dissipation of the projection device.

[0006] In a first aspect, the embodiments of the present application provide a projection device. The projection device is installed inside the vehicle for projecting inside the vehicle. The projection device includes a light-emitting device, an optical engine, a projection lens, a screen, a heat dissipation component, a rotating member, and a control member. The light-emitting device has a light-emitting end. The optical engine is disposed at one end of the light-emitting end of the light-emitting device. The projection lens is disposed on one side of the optical engine and is connected to the optical engine. The screen is installed inside the vehicle. The projection lens faces the screen. The heat dissipation component is disposed on the side of the light-emitting device and the optical engine facing away from the screen. The heat dissipation component is respectively connected to the light-emitting device and the optical engine. The rotating member is installed on the vehicle. The rotating member is rotatably connected to the vehicle.

[0007] An air outlet channel is formed between the rotating member and the vehicle body. The first end of the air outlet channel faces the heat dissipation component. The second end of the air outlet channel faces the outside of the vehicle. The light-emitting device, the optical engine, and the rotating member are all electrically connected to the control member.

[0008] Advantages of the present application: By providing a rotating member and a control member, an air outlet channel is formed between the rotating member and the vehicle body. One end of the air outlet channel faces the heat dissipation component, and the other end faces the outside of the vehicle. Since one end of the air outlet channel faces the heat dissipation component, the heat generated by the projection device is transmitted to the outside of the vehicle through the heat dissipation component and the air outlet channel, improving the heat dissipation efficiency and preventing the problem of overheating of the projection device. At the same time, since the heat dissipation component is arranged close to the air outlet channel, the noise generated by the airflow in the heat dissipation component is close to the position of the air outlet channel, and the noise is discharged to the outside of the vehicle through the air outlet channel, avoiding the transmission of noise to the inside of the vehicle when the vehicle is stationary.

[0009] In some embodiments of the present application, the projection device further includes a temperature detection component. The temperature detection component is connected to the light-emitting device. The temperature detection component is electrically connected to the control component. The control component is configured to: obtain the detection signal of the temperature detection component and control the rotation angle of the rotating member.

[0010] In some embodiments of the present application, the projection device further includes a driving component. The driving component includes two driving ends. The two driving ends are respectively connected to the screen and the rotating member.

[0011] In some embodiments of the present application, the heat dissipation component includes a first heat dissipation member, a second heat dissipation member and a fan. The first heat dissipation member is arranged at the end of the optical engine facing away from the light-emitting device. At least part of the second heat dissipation member is connected to the light-emitting device. At least part of the second heat dissipation member is arranged close to the air outlet channel. The fan is arranged between the first heat dissipation member and the second heat dissipation member.

[0012] The air inlet end of the fan faces the inside of the vehicle. The air outlet end of the fan faces the second heat dissipation member so that the air outlet end of the fan faces the air outlet channel.

[0013] In some embodiments of the present application, the first heat dissipation member includes a first substrate and a first heat dissipation fin. The first end of the first substrate is connected to the end of the optical engine facing away from the light-emitting device. The second end of the first substrate is connected to the first heat dissipation fin.

[0014] In some embodiments of the present application, the second heat dissipation member includes a heat pipe, a second substrate and a plurality of second heat dissipation fins. The second heat dissipation fins are arranged on the second substrate. A heat dissipation channel is formed between the plurality of second heat dissipation fins. The air outlet end of the fan faces the heat dissipation channel.

[0015] The first end of the heat pipe is connected to the end of the light-emitting device facing away from the light-emitting end. The second end of the heat pipe extends into the heat dissipation channel.

[0016] In some embodiments of the present application, the fan is electrically connected to the control component. The control component is configured to: obtain the detection signal of the temperature detection component and control the wind speed of the fan.

[0017] In some embodiments of the present application, the projection device further includes an electronic system. The electronic system is installed on a vehicle. The light-emitting device, the optical engine, and the heat dissipation component are all arranged on one side of the electronic system close to the interior of the vehicle.

[0018] In a second aspect, an embodiment of the present application provides a projection device. The projection device is installed inside a vehicle and is used for projecting inside the vehicle. The projection device includes a light-emitting device, an optical engine, a projection lens, a screen, a heat dissipation component, a rotating member, and a control member.

[0019] The light-emitting device has a light-emitting end. The light-emitting device is used to provide a light beam. The optical engine is used to receive the light beam and generate an image. The projection lens is used to project the image generated by the optical engine onto the screen. The heat dissipation component is respectively connected to the light-emitting device and the optical engine. The rotating member is installed on the vehicle. The rotating member is used to be rotatably connected to the vehicle. The rotating member is used to form an air outlet channel between the rotating member and the vehicle body. The first end of the air outlet channel faces the light-emitting device. The second end of the air outlet channel faces the outside of the vehicle. The control member is used to be electrically connected to the light-emitting device, the optical engine, and the rotating member.

[0020] In a third aspect, an embodiment of the present application provides a vehicle. The vehicle includes a vehicle body, a rear windshield, and a projection device. The rear windshield is arranged on the vehicle body. The vehicle body has a cockpit. The projection device is arranged in the cockpit.

[0021] The screen of the projection device faces the passenger seat of the vehicle. An opening is provided on the vehicle body. The rotating member of the projection device is rotatably arranged at the opening. An air outlet channel is formed between the rotating member and the vehicle body.

[0022] For the projection device and the vehicle provided by the present application, the projection device adopts a thin and light stacked design, which can reduce the overall thickness of the projection device while ensuring the brightness of the projection device, and avoid occupying the space above the heads of the passengers inside the vehicle. When the vehicle is in a stationary state and the projection device is in a working state, the air outlet channel is communicated with the outside of the vehicle, and the noise is discharged outside the vehicle through the air outlet channel, reducing the noise heard by the passengers inside the vehicle. At the same time, the heat of the projection device is directly transferred to the outside of the vehicle, avoiding the discomfort of the passengers caused by the heat generated by the projection device. In addition, in the present application, the control member obtains the temperature of the light-emitting device in real time according to the temperature detection member, and controls the rotation speed of the control fan and the rotation angle of the rotating member, improving the heat dissipation efficiency of the projection device. Description of the Drawings

[0023] In order to more clearly illustrate the embodiments of the present application or the implementation manners in the related art, the following will briefly introduce the drawings required for use in the description of the embodiments or the related art. Obviously, the following drawings are some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0024] Figure 1Structural schematic diagram of the vehicle provided by the embodiment of the present application Figure 1 ;

[0025] Figure 2 Structural schematic diagram of the vehicle provided by the embodiment of the present application Figure 2 ;

[0026] Figure 3 Structural schematic diagram of the projection device installed inside the vehicle provided by the embodiment of the present application Figure 1 ;

[0027] Figure 4 Structural schematic diagram of the projection device installed inside the vehicle provided by the embodiment of the present application Figure 2 ;

[0028] Figure 5 Structural schematic diagram of the projection device installed inside the vehicle provided by the embodiment of the present application Figure 3 ;

[0029] Figure 6 Schematic diagram of the electrical connection of the projection device provided by the embodiment of the present application;

[0030] Figure 7 Structural schematic diagram of the projection device from the first perspective provided by the embodiment of the present application;

[0031] Figure 8 Structural schematic diagram of the projection device from the second perspective provided by the embodiment of the present application;

[0032] Figure 9 Structural schematic diagram of the light-emitting device, optical engine, projection lens and heat dissipation component of the projection device provided by the embodiment of the present application;

[0033] Figure 10 Structural schematic diagram of the heat dissipation component of the projection device provided by the embodiment of the present application.

[0034] Reference numerals:

[0035] 100: vehicle body; 200: rear windshield;

[0036] 300: passenger seat; 400: projection device;

[0037] 410: light-emitting device; 420: optical engine;

[0038] 430: projection lens; 440: screen;

[0039] 450: heat dissipation component; 451: first heat dissipation member;

[0040] 452: first substrate; 453: first heat sink;

[0041] 454: Second heat dissipation component; 455: Heat pipe;

[0042] 456: Second substrate; 457: Second heat sink;

[0043] 458: Fan; 460: Control component;

[0044] 470: Rotating component; 480: Temperature detection component;

[0045] 490: Electronic system; 500: Opening. Specific implementation mode

[0046] Currently, with the rapid development of automotive technology, the functions of cars are becoming increasingly rich, and in-vehicle intelligent displays have become a standard feature of modern cars. Currently, the demand of in-vehicle passengers for in-vehicle entertainment display and interaction is getting higher and higher. Compared with the traditional central control liquid crystal large screen, the in-vehicle projection device can bring a larger viewing screen for passengers.

[0047] In the prior art, the in-vehicle projection device includes a light source, an imaging system, an electronic system, and a heat dissipation system. The light source is responsible for generating the light required for projection. The imaging system includes a display chip for generating images. The electronic system includes a processor and a memory for processing input signals, generating images, and controlling various functions of the projection device. The heat dissipation system includes a heat dissipation fan for ensuring that the in-vehicle projection device does not overheat during operation.

[0048] Among the various key technologies of the projection device, the solution to the heat dissipation problem of the light-emitting device is an extremely critical technology. The light-emitting device can generate a very high peak power, and the electro-optical conversion efficiency of these devices is 40% - 50%, that is, 50% - 60% of the input electrical energy is converted into heat energy. The heat dissipation problem of the light-emitting device is directly related to its service life. When the temperature of the light-emitting device is too high, it will cause the light power to decay during light emission and even burn out. In addition, as the most important DMD (Digital Micromirror Device) in the optical engine component, it will receive light beams from the light source during operation and also generate a large amount of heat. If the heat of the DMD cannot be dissipated in time, the micromirrors on it will be damaged, and then bad points will appear in the image. And the main board and chip in the projection device are responsible for realizing various functions and information exchanges in the product. When they are overheated, it will also cause temperature-related device failures.

[0049] Projection devices often need to be equipped with independent heat dissipation devices due to their own high power. Due to the limited space in the car cabin, some of the in-vehicle projection devices disclosed in the prior art use air-cooling heat dissipation solutions to achieve air intake and air outlet in the cabin. The heat and noise transferred to the cabin during the cooling process will affect the viewing experience of passengers; the other part uses the car's own heat dissipation structure, such as liquid cooling plates, air conditioners, etc., to perform auxiliary heat dissipation solutions. Although such solutions generate less noise, they are complex in structure and have a high failure rate, and will further compress the cabin space in the car.

[0050] When the car is driving, the noise of the car projection device is not too obvious due to tire noise and wind noise. When the car is stationary and the passengers are in a relatively closed space inside the car, the noise of the car projection device will directly affect the passengers' viewing experience. Many modern young people use car projection as a car theater, and the projection is used more frequently when the car is stationary, so it is particularly important to solve the noise of the car projection device in this environment.

[0051] Therefore, the existing vehicle-mounted projection device has the problems of poor heat dissipation effect and high noise.

[0052] In view of this, an embodiment of the present application provides a projection device and a vehicle. The projection device is installed inside the vehicle and is used to project inside the vehicle. The projection device includes a light emitting device, an optical machine, a projection lens, a screen, a heat dissipation component, a rotating part and a control part. The light emitting device has a light emitting end. The optical machine is arranged at one end of the light emitting device having the light emitting end. The projection lens is arranged on one side of the optical machine and is connected to the optical machine. The screen is installed inside the vehicle. The projection lens faces the screen. The heat dissipation component is arranged on the side of the light emitting device and the optical machine away from the screen. The heat dissipation component is respectively connected to the light emitting device and the optical machine. The rotating part is installed on the vehicle. The rotating part and the vehicle are rotatably connected. An air outlet channel is formed between the rotating part and the body of the vehicle. The first end of the air outlet channel faces the heat dissipation component. The second end of the air outlet channel faces the outside of the vehicle. The light emitting device, the optical machine and the rotating part are all electrically connected to the control part. The present application sets a rotating part and a control part, and the control part controls the rotating part to rotate relative to the opening of the vehicle, so that an air outlet channel is formed between the rotating part and the vehicle, and one end of the air outlet channel faces the heat dissipation component, and the other end faces the outside of the vehicle; because one end of the air outlet channel faces the heat dissipation component, the heat generated by the projection device is transmitted to the outside of the vehicle through the heat dissipation component and the air outlet channel, thereby improving the heat dissipation efficiency and preventing the projection device from overheating; at the same time, because the heat dissipation component is arranged close to the air outlet channel, the noise generated by the air flow in the heat dissipation component is close to the air outlet position, and the noise is discharged to the outside of the vehicle through the air outlet channel, thereby avoiding the noise from being transmitted to the inside of the vehicle when the vehicle is stationary.

[0053] To make the objectives, embodiments, and advantages of this application clearer, the following will clearly and completely describe the exemplary embodiments of this application in conjunction with the accompanying drawings in the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only a part of the embodiments of this application, rather than all of the embodiments.

[0054] It should be noted that the brief description of the terms in this application is only for the convenience of understanding the following described embodiments, rather than intending to limit the embodiments of this application. Unless otherwise specified, these terms should be understood in their ordinary and general meanings.

[0055] In addition, the terms "comprising" and "having" and any variations thereof are intended to cover but not exclude inclusion. For example, a product or device comprising a series of components does not necessarily have to be limited to those components clearly listed, but may include other components not clearly listed or inherent to these products or devices.

[0056] In the description of this application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, unless otherwise specified, the meaning of "plural" is two or more.

[0058] In the description of this application, it should be noted that unless otherwise clearly specified and limited, the terms "install", "connect", and "couple" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0059] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0060] Figure 1 Schematically showing the structure of a vehicle provided by an embodiment of the present application Figure 1 。 Figure 2 Schematically showing the structure of a vehicle provided by an embodiment of the present application Figure 2 。

[0061] In a first aspect, as shown in reference to Figure 1 and Figure 2 , an embodiment of the present application provides a vehicle. The vehicle includes a vehicle body 100, a rear windshield 200, and a projection device 400. The rear windshield 200 is provided on the vehicle body 100. The vehicle body 100 has a cockpit. The projection device 400 is provided in the cockpit.

[0062] The screen 440 of the projection device 400 faces the passenger seat 300 of the vehicle. An opening 500 is provided on the vehicle body 100. The rotating member 470 of the projection device 400 is rotatably provided at the opening 500. An air outlet channel is formed between the rotating member 470 and the vehicle body 100.

[0063] In some embodiments, as shown in reference to Figure 1 and Figure 2 , the projection device 400 is installed inside the vehicle. The projection device 400 is connected to the roof of the vehicle. An opening 500 is provided on the rear windshield 200. The rotating member 470 of the projection device 400 is provided at the opening 500 of the rear windshield 200 of the vehicle. The rotating member 470 can rotate around the opening 500. When the projection device 400 is in a non-working state, the rotating member 470 covers the opening 500 to prevent external air from entering the vehicle interior. When the projection device 400 is in a working state, the screen 440 of the projection device 400 faces the passenger seat 300 of the vehicle for passengers to watch videos. At the same time, the rotating member 470 rotates a certain angle relative to the rear windshield 200, and an air outlet channel is formed between the rotating member 470 and the vehicle. In this way, the heat generated by the projection device 400 flows to the outside of the vehicle through the air outlet channel, preventing the heat generated by the projection device 400 from affecting the temperature inside the vehicle. In addition, since the heat dissipation component 450 is arranged close to the air outlet channel, the noise generated by the air flow in the heat dissipation component 450 is close to the air outlet position, and the noise is discharged to the outside of the vehicle through the air outlet channel, avoiding the noise from being transmitted to the inside of the vehicle when the vehicle is in a stationary state.

[0064] In some other embodiments, the projection device 400 is installed inside the vehicle. The projection device 400 is connected to the roof of the vehicle. An opening 500 is provided on the sunroof of the vehicle body 100. The rotating member 470 of the projection device 400 is disposed at the opening 500 on the sunroof of the vehicle body 100. The rotating member 470 can rotate around the opening 500. When the projection device 400 is in a non-operating state, the rotating member 470 covers the opening 500 to prevent external air from entering the vehicle interior. When the projection device 400 is in an operating state, the screen 440 of the projection device 400 faces the passenger seat 300 of the vehicle for passengers to watch videos. At the same time, the rotating member 470 rotates a certain angle relative to the sunroof of the vehicle body 100, and an air outlet channel is formed between the rotating member 470 and the vehicle. In this way, the heat generated by the projection device 400 flows to the outside of the vehicle through the air outlet channel, preventing the heat generated by the projection device 400 from affecting the temperature inside the vehicle. In addition, since the heat dissipation component 450 is disposed close to the air outlet channel, the noise generated by the airflow in the heat dissipation component 450 is close to the air outlet position, and the noise is discharged outside the vehicle through the air outlet channel, preventing the noise from being transmitted to the vehicle interior when the vehicle is stationary.

[0065] Exemplarily, the opening 500 can also be provided on the side window of the vehicle body 100, and the rotating member 470 of the projection device 400 is disposed at the opening 500 on the side window of the vehicle body 100. The advantages of the above embodiments can also be achieved, so they will not be elaborated here.

[0066] For the sake of description, in the following embodiments, an example in which an opening 500 is provided on the rear windshield 200 of the vehicle body 100 will be described.

[0067] Figure 3 Schematically showing the structural schematic of the projection device 400 provided by the embodiment of the present application installed inside the vehicle Figure 1 。 Figure 4 Schematically showing the structural schematic of the projection device 400 provided by the embodiment of the present application installed inside the vehicle Figure 2 。 Figure 5 Schematically showing the structural schematic of the projection device 400 provided by the embodiment of the present application installed inside the vehicle Figure 3 。 Figure 6 Schematically showing the electrical connection schematic of the projection device 400 provided by the embodiment of the present application.

[0068] In a second aspect, referring to Figures 3 to 6As shown in the figure, an embodiment of the present application provides a projection device 400. The projection device 400 is installed inside a vehicle and is used for projection inside the vehicle. The projection device 400 includes a light-emitting device 410, an optical engine 420, a projection lens 430, a screen 440, a heat dissipation component 450, a rotating member 470, and a control member 460. The light-emitting device 410 has a light-emitting end. The optical engine 420 is disposed at one end of the light-emitting end of the light-emitting device 410. The projection lens 430 is disposed on one side of the optical engine 420 and is connected to the optical engine 420. The screen 440 is installed inside the vehicle. The projection lens 430 faces the screen 440. The heat dissipation component 450 is disposed on the side of the light-emitting device 410 and the optical engine 420 facing away from the screen 440. The heat dissipation component 450 is respectively connected to the light-emitting device 410 and the optical engine 420.

[0069] An air outlet channel is formed between the rotating member 470 and the vehicle. The first end of the air outlet channel faces the heat dissipation component 450. The second end of the air outlet channel faces the outside of the vehicle. The light-emitting device 410, the optical engine 420, and the rotating member 470 are all electrically connected to the control member 460.

[0070] Exemplarily, referring to Figures 3 to 6 As shown in the figure, the light-emitting device 410 may be a semiconductor laser or an LED (Light-emitting Diode). The light-emitting device 410 is responsible for providing an illumination beam. The core of the optical engine 420 is a DMD chip. When the beam of the light-emitting device 410 irradiates the DMD chip, the micromirrors on the surface of the DMD chip reflect the beam through different rotations to form an image. The projection lens 430 is responsible for focusing the light and projecting it onto the screen 440.

[0071] During the use of the projection device 400, both the light-emitting device 410 and the DMD chip generate heat during operation. The heat dissipation component 450 disposed on the side of the light-emitting device 410 and the optical engine 420 facing away from the screen 440 is used to dissipate heat from the light-emitting device 410 and the optical engine 420.

[0072] Exemplarily, when the projection device 400 is in the working state, the control member 460 controls the light-emitting device 410 and the optical engine 420 to start, and controls the screen 440 to drop. For example, the screen 440 faces the rear passenger seat 300. At the same time, the control member 460 controls the rotating member 470 to rotate by a certain angle. In this way, an air outlet channel is formed between the rotating member 470 and the vehicle. The cold air in the vehicle cockpit enters the interior of the projection device 400 through the bottom air intake method. Part of the cold air dissipates heat from the optical engine 420, and the other part of the cold air dissipates heat from the light-emitting device 410. Subsequently, these heat-carrying airflows flow through the heat dissipation component 450 and the air outlet channel to the outside of the vehicle to achieve the heat dissipation of the projection device 400. In addition, since the noise generated by the airflow in the heat dissipation component 450 is close to the position of the air outlet channel, the noise is discharged to the outside of the vehicle through the air outlet channel, avoiding the transmission of the noise generated by the heat-carrying air to the interior of the vehicle.

[0073] Exemplarily, referring to Figure 3 and Figure 4 as shown, the first end of the rotating member 470 is rotatably connected to the vehicle. Among them, a high-precision rotary bearing can be used at the connection between the rotating member 470 and the vehicle to ensure the smoothness and stability of the rotation of the rotating member 470, reduce friction and wear, and extend the service life.

[0074] In the projection device 400 provided in the present application, by setting the light-emitting device 410, the optical engine 420, and the rotating member 470 to be electrically connected to the control member 460, centralized control of the entire projection device 400 by the control member 460 is achieved. Among them, the control member 460 controls the brightness of the light-emitting device 410 to adapt to different ambient light conditions and provide the best projection effect. The control member 460 controls the parameters of the optical engine 420, such as contrast, color saturation, sharpness, etc., to optimize the quality of the projection image. The control member 460 controls the rotation angle of the rotating member 470 to improve the heat dissipation efficiency.

[0075] Exemplarily, the control member 460 can be a central control unit, which is responsible for processing signals from various components of the projection device 400 and sending control instructions. The central control unit can integrate a variety of interfaces to facilitate connection with the light-emitting device 410, the optical engine 420, and the rotating member 470. In addition, the control member 460 can be equipped with a user interface, such as a touch screen or physical buttons, to facilitate user operation and setting.

[0076] Exemplarily, the rotating member 470 can be a rotating plate.

[0077] As an implementable embodiment, the projection device 400 further includes an electronic system 490. The electronic system 490 is installed on the vehicle. The light-emitting device 410, the optical engine 420, and the heat dissipation component 450 are all arranged on the side of the electronic system 490 close to the interior of the vehicle.

[0078] Exemplarily, the electronic system 490 refers to the electronic components and circuits used to control, drive, and manage each functional module of the projection device 400. The electronic system 490 generally includes multiple subsystems and components that cooperate together to achieve the core functions of the projection device 400, such as image processing, light source control, heat dissipation management, etc. The electronic system 490 includes an image processing unit, a light source control unit, a power management unit, and a user control unit. The image processing unit is responsible for receiving and processing the input video signal and converting it into a format suitable for projection. The light source control unit controls the turning on, turning off, and brightness adjustment of the projection light source (such as LED, laser). The power management unit provides a stable power supply to ensure the normal operation of each electronic component. The user control unit includes keys. The user controls the various functions of the projection device 400 through the keys.

[0079] It can be understood that the control member 460 can be a part of the electronic system 490. The control member 460 is responsible for coordinating and controlling the operation of each subsystem, and executing user commands and system management tasks.

[0080] Exemplarily, with reference to Figure 3 As shown, the electronic system 490 is installed on the top of the vehicle. The light-emitting device 410, the optical engine 420, and the heat dissipation assembly 450 are centrally arranged on the side of the electronic system 490 close to the interior of the vehicle. In this way, the space inside the vehicle can be effectively utilized, the occupied area of the projection device 400 can be reduced, a thin and light stacking design is achieved, the overall thickness of the projection device 400 can be reduced while ensuring the brightness of the projection device 400, and the space above the heads of the passengers inside the vehicle can be avoided from being occupied.

[0081] Exemplarily, the electronic system 490 adopts a miniaturized board design. In this way, functions such as image processing, light source control, and heat dissipation tube 455 management are integrated on one or several miniaturized boards. At the same time, the heat dissipation assembly 450 is arranged at a position close to the interior of the vehicle, and the air flow inside the vehicle can be utilized to assist in heat dissipation, improving the heat dissipation efficiency.

[0082] As an implementable embodiment, the projection device 400 further includes a temperature detection member 480. The temperature detection member 480 is connected to the light-emitting device 410. The temperature detection member 480 is electrically connected to the control member 460. The control member 460 is configured to: obtain the detection signal of the temperature detection member 480 and control the rotation angle of the rotating member 470.

[0083] Exemplarily, the temperature detection member 480 is used to obtain the temperature of the light-emitting device 410. In this way, the control member 460 controls the rotation angle of the rotating member 470 according to the real-time temperature of the light-emitting device 410 detected by the temperature detection member 480.

[0084] In some embodiments, when the control member 460 obtains the detection signal of the temperature detection member 480 and determines that the temperature of the light emitting device 410 is too high, the control member 460 controls the rotation angle of the rotating member 470 to increase, so as to promote heat dissipation and reduce the temperature of the projection device 400.

[0085] In other embodiments, when the control member 460 obtains the detection signal of the temperature detection member 480 and determines that the temperature of the light emitting device 410 is normal, the control member 460 controls the rotation angle of the rotating member 470 to decrease, so as to avoid excessive external hot air from entering the vehicle interior.

[0086] Exemplarily, the temperature detection member 480 includes an infrared temperature sensor. The infrared temperature sensor uses the infrared radiation emitted by the light emitting device 410 to convert it into a temperature value to obtain the temperature of the light emitting device 410.

[0087] Exemplarily, the temperature detection member 480 includes a resistance temperature sensor. The resistance temperature sensor is designed based on the principle that the resistance of a metal changes with temperature. The resistance temperature sensor has the advantage of good temperature stability.

[0088] Exemplarily, the temperature detection member 480 includes an NTC (Negative Temperature Coefficient Thermistor) temperature sensor. The NTC temperature sensor is a kind of thermistor, and its resistance value decreases as the temperature increases. The NTC temperature sensor is very sensitive to temperature changes and can detect tiny temperature changes. The NTC temperature sensor has the advantage of high sensitivity.

[0089] Exemplarily, the control member 460 stores relevant data of a first temperature range, a second temperature range, and a third temperature range. Among them, the temperature of the first temperature range is less than the temperature of the second temperature range, and the temperature of the second temperature range is less than the temperature of the third temperature range. Correspondingly, the control member 460 stores relevant data of a first rotation angle, a second rotation angle, and a third rotation angle. Among them, the first rotation angle is less than the second rotation angle, and the second rotation angle is less than the third rotation angle. Different temperature ranges correspond to different rotation angles. For example, the first temperature range corresponds to the first rotation angle, the second temperature range corresponds to the second rotation angle, and the third temperature range corresponds to the third rotation angle. When the control member 460 obtains the detection signal of the temperature detection member 480, that is, the real-time temperature of the light emitting device 410, the control member 460 determines which temperature range the real-time temperature is in and controls the rotating member 470 to rotate the corresponding rotation angle. For example, when the control member 460 determines that the real-time temperature is in the third temperature range, the control member 460 controls the rotating member 470 to rotate the third rotation angle.

[0090] In some embodiments, the first temperature range is 50 - 60 °C, and the first rotation angle is 30°. The second temperature range is 61 - 70 °C, and the second rotation angle is 40°. The third temperature range is 71 - 80 °C, and the third rotation angle is 50°.

[0091] The projection device 400 provided by this application can detect the temperature of the light-emitting device 410 in real time through the temperature detection component 480. The control component 460 can dynamically adjust the angle of the rotating component 470 according to different temperature ranges to optimize the heat dissipation effect. The higher the temperature of the light-emitting device 410, the larger the rotation angle of the rotating component 470, enhancing the heat dissipation ability of the projection device 400. At the same time, when the temperature detection component 480 detects that the temperature is too high, the control component 460 immediately adjusts the angle of the rotating component 470 to expand the air outlet channel, thereby quickly reducing the temperature of the light-emitting device 410 and preventing the projection device 400 from being damaged due to overheating.

[0092] Exemplarily, the temperature detection component 480 includes a temperature sensor.

[0093] As an implementable embodiment, the projection device 400 further includes a driving component. The driving component includes two driving ends. The two driving ends are respectively connected to the screen 440 and the rotating component 470.

[0094] In some embodiments, the driving component includes a dual-output shaft motor. The dual-output shaft motor includes two output shafts, which are respectively located at both ends of the motor. In this way, during the operation of the dual-output shaft motor, the two output shafts rotate synchronously, respectively driving the screen 440 and the rotating component 470. For example, one output shaft controls the lowering of the screen 440 through a gear transmission mechanism to ensure that the screen 440 can be accurately adjusted to the required position. The other output shaft controls the rotation of the rotating component 470 through another set of gear transmission mechanisms, enabling the rotating component 470 to make appropriate adjustments at the opening 500 of the rear windshield 200 to form an air outlet channel. By setting the dual-output shaft motor, the two output shafts of the dual-output shaft respectively drive the screen 440 and the rotating component 470, simplifying the structure of the projection device 400, reducing the number of required motors and the installation complexity. This helps to reduce costs and improve the reliability of the projection device 400.

[0095] In some other embodiments, the driving member includes a motor. The projection device 400 further includes a driving gear and a driven gear. The driving gear is directly connected to the motor shaft. The driven gear meshes with the driving gear. The motor is connected to different driven gears through the driving gear. Among them, one driven gear is connected to the lifting mechanism of the screen 440. Another driven gear is connected to the rotating member 470. In this way, when the motor starts and rotates the driving gear, the driving gear drives the driven gear to rotate through meshing. The two driven gears respectively drive the screen 440 and the rotating member 470 to move. At the same time, by adjusting the gear ratio, the rotation angle and speed of the rotating member 470 can be precisely controlled, realizing precise control of the rotation angle of the rotating member 470.

[0096] In still some other embodiments, the driving member includes two motors. The two motors are respectively used to drive the lifting of the screen 440 and the rotation of the rotating member 470. In this way, each motor controls one component respectively, which enables the movements of the screen 440 and the rotating member 470 to be independent, providing higher control flexibility and precision.

[0097] Figure 7 A schematic structural diagram showing a first perspective of the projection device 400 provided by an embodiment of the present application is shown schematically. Figure 8 A schematic structural diagram showing a second perspective of the projection device 400 provided by an embodiment of the present application is shown schematically. Figure 9 A schematic structural diagram showing the light-emitting device 410, the optical engine 420, the projection lens 430 and the heat dissipation component 450 of the projection device 400 provided by an embodiment of the present application is shown schematically. Figure 10 A schematic structural diagram showing the heat dissipation component 450 of the projection device 400 provided by an embodiment of the present application is shown schematically.

[0098] As a feasible implementation manner, referring to Figures 7 to 10 As shown, the heat dissipation component 450 includes a first heat dissipation member 451, a second heat dissipation member 454 and a fan 458. The first heat dissipation member 451 is disposed at the end of the optical engine 420 facing away from the light-emitting device 410. At least a part of the second heat dissipation member 454 is connected to the light-emitting device 410. At least a part of the second heat dissipation member 454 is disposed close to the air outlet channel. The fan 458 is disposed between the first heat dissipation member 451 and the second heat dissipation member 454.

[0099] The air inlet end of the fan 458 faces the interior of the vehicle. The air outlet end of the fan 458 faces the second heat dissipation member 454, so that the air outlet end of the fan 458 faces the air outlet channel.

[0100] Exemplarily, when the projection device 400 is in the working state, the control member 460 controls the light-emitting device 410 and the optical engine 420 to start, and the control member 460 controls the fan 458 to start. The control member 460 controls the rotating member 470 to rotate by a certain angle to form an air outlet channel. Under the rotation of the fan 458, the cold air inside the vehicle flows along Figure 4 the direction of the black solid arrow in the figure towards the projection device 400 to dissipate heat from the projection device 400. Among them, a part of the cold air dissipates heat from the optical engine 420 through the first heat sink 451 and is then sucked into the fan 458, and another part of the cold air is directly sucked into the fan 458. The air flow converging at the fan 458 transfers heat to the outside of the vehicle through the second heat sink and the air outlet channel.

[0101] By connecting the first heat sink 451 and the second heat sink 454 to the optical engine 420 and the light-emitting device 410 respectively, multiple heat dissipation paths are formed in the projection device 400, effectively improving the heat dissipation efficiency of the projection device 400. By arranging the fan 458 between the first heat sink 451 and the second heat sink 454, the air inlet end of the fan 458 faces the inside of the vehicle to suck in relatively cold air; the air outlet end of the fan 458 faces the air outlet channel to discharge the air flow carrying heat to the outside of the vehicle, forming an effective air flow path. In this way, the fan 458 can adjust the flow direction of the gas inside the vehicle to ensure that the air flow carrying heat quickly flows out, further enhancing the heat dissipation effect of the projection device 400. The integrated design of the first heat sink 451, the second heat sink 454 and the fan 458 makes the heat dissipation component 450 of the projection device 400 have a compact structure and small occupied space, which is suitable for installation in the limited space inside the vehicle.

[0102] Exemplarily, the fan 458 includes a centrifugal fan. The centrifugal fan generates strong centrifugal force through the rotation of the impeller, and throws the air from the center of the fan 458 to the outer periphery, forming an efficient air flow. The air flow generated by the centrifugal fan is relatively uniform, reducing the vortex and turbulent flow phenomena in the air flow and providing a stable air flow. Due to the uniform air flow, the centrifugal fan runs with relatively low noise, which is suitable for application scenarios with high noise requirements. At the same time, the design of the centrifugal fan enables it to provide efficient air flow in a limited space, improving the overall heat dissipation performance of the device.

[0103] As an implementable embodiment, the first heat sink 451 includes a first substrate 452 and a first heat sink fin 453. The first end of the first substrate 452 is connected to the end of the optical engine 420 facing away from the light-emitting device 410. The second end of the first substrate 452 is connected to the first heat sink fin 453.

[0104] Exemplarily, the first end of the first substrate 452 is connected to the end of the optical engine 420 facing away from the light-emitting device 410 to play a role in heat conduction, quickly transferring the heat of the optical engine 420 to the first heat sink 453. The number of the first heat sinks 453 is multiple. The first heat sink 453 can be a thin sheet, and these thin sheets increase the heat dissipation area of the first heat dissipation member 451, enabling more heat to be dissipated through convection and radiation. During the use of the projection device 400, the first substrate 452 obtains the heat of the optical engine 420 and transfers the heat to the heat sink. At the same time, the airflow flowing towards the air inlet end of the fan 458 blows the first heat sink 453, so that the first heat sink 453 can quickly dissipate the heat of the optical engine 420.

[0105] Exemplarily, the material of the first heat sink 453 includes various types, such as aluminum and copper. The heat sink made of aluminum has the advantages of light weight and good heat conduction performance. The heat sink made of copper has the advantage of good heat conduction performance.

[0106] Exemplarily, the shape of the first heat sink 453 includes flat type and fin type to adapt to different heat dissipation environments and requirements.

[0107] As an implementable embodiment, the second heat dissipation member 454 includes a heat pipe 455, a second substrate 456, and multiple second heat sinks 457. The second heat sinks 457 are arranged on the second substrate 456. Heat dissipation channels are formed between the multiple second heat sinks 457. The air outlet end of the fan 458 faces the heat dissipation channels.

[0108] The first end of the heat pipe 455 is connected to the end of the light-emitting device 410 facing away from the light-emitting end. The second end of the heat pipe 455 extends into the heat dissipation channels.

[0109] Exemplarily, the heat pipe 455 is a heat conduction device. The heat pipe 455 uses the phase change (evaporation and condensation) of a liquid to transfer heat. One end (evaporation end) of the heat pipe 455 absorbs heat, and the working fluid inside (usually water, ethanol or other low-boiling-point liquids) quickly evaporates under a low-pressure environment, absorbing a large amount of thermal energy. The steam generated by evaporation quickly moves to the other end (condensation end) inside the heat pipe 455. Since there is almost no thermal resistance inside the heat pipe 455, the steam can quickly conduct heat. At the condensation end, the steam condenses into a liquid and releases the heat absorbed before. The condensed liquid returns to the evaporation end through capillary action or gravity to complete a cycle.

[0110] Illustratively, during the operation of the projection device 400, the first end of the heat pipe 455 obtains heat from the light-emitting device 410, and the liquid in the heat pipe 455 transfers the heat to the second end of the heat pipe 455. At the same time, since the second end of the heat pipe 455 extends into the heat dissipation channel, the second heat sink 457 can quickly obtain heat from the second end of the heat pipe 455. Under the blowing action of the airflow of the fan 458, the heat of the second heat sink 457 is carried by the airflow to the air outlet channel to reduce the heat of the second heat sink 457 and reduce the heat of the light-emitting device 410.

[0111] It is understandable that the second heat sink 457 and the first heat sink 453 are made of the same material.

[0112] As an achievable implementation, the fan 458 is electrically connected to the control element 460 . The control element 460 is configured to obtain a detection signal from the temperature detection element 480 and control the wind speed of the fan 458 .

[0113] Exemplarily, during the operation of the projection device 400, the light emitting device 410 generates heat, and the optical engine 420 generates heat. The first heat sink 451 is used to dissipate heat from the optical engine 420, and the second heat sink 454 is used to dissipate heat from the light emitting device 410. The fan 458 is used to direct the airflow inside the vehicle to the projection device 400, so that the airflow dissipates heat from the first heat sink 451 and the second heat sink 454, and then the fan 458 discharges the hot airflow to the outside of the vehicle through the air outlet channel.

[0114] In some embodiments, the control component 460 monitors the temperature of the light-emitting device 410 in real time by acquiring the detection signal of the temperature detection component 480 (such as a temperature sensor) to ensure the accuracy and timeliness of the temperature data. According to the real-time temperature data, the control component 460 can automatically adjust the wind speed of the fan 458 to achieve intelligent temperature management and heat dissipation control. The control component 460 can dynamically adjust the wind speed of the fan 458 according to the temperature of the light-emitting device 410. When the temperature is high, increase the wind speed to enhance the heat dissipation effect; when the temperature is low, reduce the wind speed to save energy. By intelligently controlling the wind speed of the fan 458, the air flow path is optimized to ensure that the cold air can effectively flow through the heat sink and the heat pipe 455 to take away more heat.

[0115] In a third aspect, an embodiment of the present application provides a projection device 400. The projection device 400 is installed inside a vehicle and is used to project inside the vehicle. The projection device 400 includes a light emitting device 410, an optical machine 420, a projection lens 430, a screen 440, a heat dissipation component 450, a rotating member 470, and a control member 460.

[0116] The light-emitting device 410 has a light-emitting end. The light-emitting device 410 is used to provide a light beam. The optical engine 420 is used to receive the light beam and generate an image. The projection lens 430 is used to project the image generated by the optical engine 420 onto the screen 440. The heat dissipation component 450 is respectively connected to the light-emitting device 410 and the optical engine 420. The rotating member 470 is installed on the vehicle. The rotating member 470 is used to be rotatably connected to the vehicle. The rotating member 470 is used to form an air outlet channel between the rotating member 470 and the vehicle body 100. The first end of the air outlet channel faces the light-emitting device 410. The second end of the air outlet channel faces the outside of the vehicle. The control member 460 is used to be electrically connected to the light-emitting device 410, the optical engine 420 and the rotating member 470.

[0117] The projection device 400 and the vehicle provided by the embodiments of the present application adopt a thin and light stacking design, which can reduce the overall thickness of the projection device 400 while ensuring the brightness of the projection device 400, and avoid occupying the space above the heads of the passengers inside the vehicle. When the projection device 400 is in the working state in the stationary state of the vehicle, the air outlet channel is communicated with the outside of the vehicle, which can reduce the noise heard by the passengers in the vehicle. At the same time, the heat of the projection device 400 is directly transferred to the outside of the vehicle, avoiding the discomfort of the passengers caused by the heat generated by the projection device. In addition, in the present application, the control member obtains the temperature of the light-emitting device 410 in real time according to the temperature detection member 480, and controls the rotation speed of the control fan 458 and the rotation angle of the rotating member 470, improving the heat dissipation efficiency of the projection device 400.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0119] For the sake of convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. According to the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, so that those skilled in the art can better use the embodiments and various different modified embodiments suitable for specific use considerations.

Claims

1. A projection device (400), characterized in that: Installed inside a vehicle and used for projection inside the vehicle, the projection device (400) comprises: A light emitting device (410) having a light emitting end; An optical machine (420) is arranged at one end of the light emitting end of the light emitting device (410); A projection lens (430) is disposed on one side of the optical machine (420) and is connected to the optical machine (420); A screen (440) is installed inside the vehicle, and the projection lens (430) faces the screen (440); a heat dissipation component (450) disposed on a side of the light emitting device (410) and the optical engine (420) away from the screen (440); the heat dissipation component (450) is connected to the light emitting device (410) and the optical engine (420) respectively; A rotating member (470) is mounted on the vehicle, and the rotating member (470) and the vehicle are rotatably connected; An air outlet channel is formed between the rotating member (470) and the body (100) of the vehicle, wherein a first end of the air outlet channel faces the heat dissipation assembly (450), and a second end of the air outlet channel faces the outside of the vehicle; A control member (460), the light emitting device (410), the optical machine (420) and the rotating member (470) are all electrically connected to the control member (460).

2. The projection device (400) according to claim 1, characterized in that: It also includes a temperature detection component (480), wherein the temperature detection component (480) is connected to the light emitting device (410), and the temperature detection component (480) is electrically connected to the control component (460); The control element (460) is configured to obtain a detection signal from the temperature detection element (480) and control a rotation angle of the rotation element (470).

3. The projection device (400) according to claim 2, characterized in that: It also includes a driving member, which includes two driving ends, and the two driving ends are respectively connected to the screen (440) and the rotating member (470).

4. The projection device (400) according to claim 2, characterized in that: The heat dissipation assembly (450) comprises a first heat dissipation element (451), a second heat dissipation element (454) and a fan (458); the first heat dissipation element (451) is arranged at the end of the optical engine (420) away from the light emitting device (410); at least a portion of the second heat dissipation element (454) is connected to the light emitting device (410); at least a portion of the second heat dissipation element (454) is arranged close to the air outlet channel; and the fan (458) is arranged between the first heat dissipation element (451) and the second heat dissipation element (454); The air inlet end of the fan (458) faces the interior of the vehicle, and the air outlet end of the fan (458) faces the second heat sink (454), so that the air outlet end of the fan (458) faces the air outlet channel.

5. The projection device (400) according to claim 4, characterized in that: The first heat sink (451) comprises a first substrate (452) and a first heat sink (453), wherein a first end of the first substrate (452) is connected to an end of the optical machine (420) facing away from the light-emitting device (410), and a second end of the first substrate (452) is connected to the first heat sink (453).

6. The projection device (400) according to claim 4, characterized in that: The second heat sink (454) comprises a heat pipe (455), a second substrate (456) and a plurality of second heat sinks (457); the second heat sinks (457) are arranged on the second substrate (456); a heat dissipation channel is formed between the plurality of second heat sinks (457); and an air outlet end of the fan (458) faces the heat dissipation channel; The first end of the heat pipe (455) is connected to an end of the light emitting device (410) that is away from the light emitting end, and the second end of the heat pipe (455) extends into the heat dissipation channel.

7. The projection device (400) according to any one of claims 4 to 6, characterized in that: The fan (458) and the control element (460) are electrically connected; The control element (460) is configured to obtain a detection signal from the temperature detection element (480) and control the wind speed of the fan (458).

8. The projection device (400) according to any one of claims 1 to 6, characterized in that: It also includes an electronic system (490), which is installed on the vehicle, and the light-emitting device (410), the optical machine (420) and the heat dissipation component (450) are all arranged on a side of the electronic system (490) close to the interior of the vehicle.

9. A projection device (400), characterized in that: Installed inside a vehicle and used for projection inside the vehicle, the projection device (400) comprises a light emitting device (410), an optical machine (420), a projection lens (430), a screen (440), a heat dissipation component (450), a rotating part (470) and a control part (460); The light emitting device (410) has a light emitting end; the light emitting device (410) is used to provide a light beam; the optical engine (420) is used to receive the light beam and generate an image; the projection lens (430) is used to project the image generated by the optical engine (420) onto the screen (440); the heat dissipation component (450) is connected to the light emitting device (410) and the optical engine (420) respectively; the rotating member (470) is installed on the vehicle, and the rotating member (470) is used to be rotatably connected to the vehicle; the rotating member (470) is used to form an air outlet channel between the rotating member (470) and the vehicle body (100) of the vehicle, and the first end of the air outlet channel faces the light emitting device (410), and the second end of the air outlet channel faces the outside of the vehicle; The control component (460) is used to be electrically connected to the light-emitting device (410), the optical machine (420) and the rotating component (470).

10. A vehicle, characterized in that: The invention comprises a vehicle body (100), a rear windshield (200), and a projection device (400) according to any one of claims 1 to 8, wherein the rear windshield (200) is arranged on the vehicle body (100), the vehicle body (100) has a cockpit, and the projection device (400) is arranged in the cockpit; The screen (440) of the projection device (400) faces the passenger seat (300) of the vehicle, an opening (500) is provided on the vehicle body (100), a rotating member (470) of the projection device (400) can be rotatably arranged at the opening (500), and an air outlet channel is formed between the rotating member (470) and the vehicle body (100).

Images