Vehicle-mounted projection device and vehicle

Abstract

Vehicle-mounted projection device comprising a housing and a projection assembly, characterized in that the projection assembly comprises a laser generation unit, a beam path unit, a main control board and a connecting cable harness, wherein the laser generation unit is configured to emit laser light, wherein the beam path unit is configured to image according to the laser light emitted by the laser generation unit, wherein the housing comprises a first receiving cavity and a second receiving cavity, wherein the first receiving cavity and the second receiving cavity are arranged in a first direction, wherein the first receiving cavity is connected to the second receiving cavity via a light transmission aperture, wherein the main control board and the laser generation unit are arranged in the first receiving cavity, and wherein the beam path unit is arranged in the second receiving cavity. wherein the interconnection harness comprises a first interconnection harness and a second interconnection harness, wherein the first interconnection harness is connected between the main control board and the laser generation unit, wherein the second interconnection harness extends from the first receiving cavity to the second receiving cavity and is connected between the main control board and the beam path unit, wherein the first interconnection harness and the second interconnection harness are each located outside the light transmission aperture.

Description

Technical area

[0001] The present utility model relates to the technical field of vehicle-mounted projectors, in particular to a vehicle-mounted projection device and a vehicle. State of the art

[0002] With the intelligent popularization and application of automobiles, there are increasingly more entertainment functions, which makes the application of projectors in automobiles possible. Since the working conditions of in-vehicle projectors are more complex than those of home projectors, the design of in-vehicle projectors requires technical solutions with high maturity and good stability.

[0003] Currently, the commonly used imaging principle of car projectors is digital light processing (DLP). That is, light is emitted from the light source and irradiated through the condenser lens onto the color wheel. The three-color images of red, green, and blue are alternately output, so that the coloring can be completed by the synchronized color wheel. The alternation will be completed in a very short time. The color mixing effect of the space is completed by the persistence of human vision. Then, it is irradiated onto a digital micromirror device (DMD) through a molded lens. The pixels of the projected image are controlled by the DMD chip.

[0004] However, the wiring harness inside such a conventional projector is longer, resulting in poor projection results. Such projectors are relatively large, which cannot accommodate the vehicle's space requirements. Contents of this utility model

[0005] The present application provides a vehicle-mounted projection device and a vehicle, wherein the internal wiring layout of the projection device is reasonable, so that the projection effect is better and the volume is small, which can meet the space requirement of the vehicle.

[0006] In a first aspect, the present application provides a vehicle-mounted projection device comprising a housing and a projection assembly, wherein the projection assembly includes a laser generation unit, an optical path unit, a main control board, and a connecting wire harness, wherein the laser generation unit is configured to emit laser light, wherein the optical path unit is configured to image according to the laser light emitted by the laser generation unit, wherein the housing includes a first receiving cavity and a second receiving cavity, wherein the first receiving cavity and the second receiving cavity are arranged in a first direction, wherein the first receiving cavity communicates with the second receiving cavity via a light passage opening, wherein the main control board and the laser generation unit are arranged in the first receiving cavity,wherein the optical path unit is arranged in the second receiving cavity, wherein the connecting wire harness comprises a first connecting wire harness and a second connecting wire harness, wherein the first connecting wire harness is connected between the main control board and the laser generation unit, wherein the second connecting wire harness extends from the first receiving cavity to the second receiving cavity and is connected between the main control board and the optical path unit, wherein the first connecting wire harness and the second connecting wire harness are each located outside the light passage opening.

[0007] As in the vehicle-mounted projection device described above, it is alternatively provided that the main control board is arranged on a side of the first receiving cavity facing away from the second receiving cavity, wherein the first connecting wire harness and the second connecting wire harness are each connected to an edge region of the main control board.

[0008] Alternatively, as in the vehicle-mounted projection device described above, an opening is arranged at an end of the housing facing away from the second receiving cavity in the first direction, the main control board being arranged at the opening, the shape of the main control board being identical to the shape of the opening.

[0009] As with the vehicle-mounted projection device described above, it is alternatively provided that the first connecting wiring harness is arranged outside the inner beam path of the laser generating unit, and / or wherein the second connecting wiring harness is arranged outside the inner beam path of the beam path unit.

[0010] Alternatively, as in the vehicle-mounted projection device described above, the laser generating unit comprises a laser light source and a color wheel, the color wheel being arranged on a laser light emission path of the laser light source to perform color separation of the laser light emitted from the laser light source, the first connecting harness being arranged outside the laser light emission path.

[0011] As in the vehicle-mounted projection device described above, it is alternatively provided that the optical path unit comprises a digital micromirror chip and a lens, wherein the digital micromirror chip is arranged on the laser light emission path of the laser generation unit, wherein the lens is arranged on a reflection optical path of the digital micromirror chip, wherein the second connection harness is arranged outside the laser light emission path and the reflection optical path.

[0012] Alternatively, as in the vehicle-mounted projection device described above, the optical path unit further comprises a plurality of mirrors, the plurality of mirrors being arranged between the laser light source and the digital micromirror chip, which are configured to adjust a direction and a path of the laser light emission path of the laser generation unit, so as to ensure that the light of the laser generation unit can be received by the lens and the light can be projected onto a screen.

[0013] As in the vehicle-mounted projection device described above, it is alternatively provided that a partition portion is arranged between the first receiving cavity and the second receiving cavity, wherein the light passage opening is surrounded by the partition portion, wherein the partition portion has a cable receiving groove, wherein the second connection wire harness extends from the first receiving cavity to the second receiving cavity through the cable receiving groove, so that the main control board is connected to the optical path unit.

[0014] Alternatively, as in the vehicle-mounted projection device described above, it is provided that the plurality of cable receiving grooves are provided, each cable receiving groove being used for the passage of various second connecting wire harnesses.

[0015] In a second aspect, the present application provides a vehicle comprising the above projection device mounted on the vehicle.

[0016] The present application provides a vehicle-mounted projection device and a vehicle, wherein the vehicle-mounted projection device comprises a housing and a projection assembly, wherein the projection assembly comprises a laser generation unit, an optical path unit, a main control board, and a connecting wire harness, wherein the laser generation unit is configured to emit laser light, wherein the optical path unit is configured to image according to the laser light emitted by the laser generation unit, wherein the housing comprises a first receiving cavity and a second receiving cavity, wherein the first receiving cavity and the second receiving cavity are arranged in a first direction, wherein the first receiving cavity communicates with the second receiving cavity via a light passage opening, wherein the main control board and the laser generation unit are arranged in the first receiving cavity,The optical path unit is arranged in the second receiving cavity, and the connecting wire harness comprises a first connecting wire harness and a second connecting wire harness, the first connecting wire harness being connected between the main control board and the laser generation unit, the second connecting wire harness extending from the first receiving cavity to the second receiving cavity and being connected between the main control board and the optical path unit, the first connecting wire harness and the second connecting wire harness each being located outside the light passage opening. The present utility model provides a vehicle-mounted projection device and a vehicle that have a small volume and a good projection effect.

[0017] The structure of the vehicle-mounted projection apparatus and the vehicle according to the present application, as well as other purposes and advantageous effects of the present utility model, will be more clearly understood by the description of preferred embodiments taken in conjunction with the drawings. Short description of the drawing Fig. 1 is a schematic diagram of the structure of a vehicle-mounted projection device according to an embodiment of the present application; Fig. 2 is a schematic diagram of the wiring layout of a main control board in a vehicle-mounted projection device according to an embodiment of the present application. Reference symbol: 10 Vehicle-mounted projection device; 100 housings; 110 First receiving cavity; 120 Second receiving cavity; 130 light passage opening; 140 dividing section; 141 cable receiving groove; 200 projection assembly; 210 laser generation unit; 211 laser light source; 212 color wheel; 220 beam path unit; 221 DMD chip; 222 lens; 230 main control board; 240 connecting wiring harness; 241 First connecting wiring harness; 242 Second connecting harness; 250 power control board; 260 plug-in piece; 270 sealing plate; 280 heat dissipation fans. Detailed embodiments

[0018] In order to clarify the purpose, technical solutions, and advantages of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Of course, the described embodiments are a part of the embodiments of the present application and not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0019] With the intelligent popularization and application of automobiles, there are increasingly more entertainment functions, which makes the application of projectors in automobiles possible. Since the working conditions of in-vehicle projectors are more complex than those of home projectors, the design of in-vehicle projectors requires technical solutions with high maturity and good stability.

[0020] Currently, the commonly used imaging principle of car projectors is digital light processing (DLP). That is, light is emitted from the light source and irradiated through the condenser lens onto the color wheel. The three-color images of red, green, and blue are alternately output, so that the coloring can be completed by the synchronized color wheel. The alternation will be completed in a very short time. The color mixing effect of the space is completed by the persistence of human vision. Then, it is irradiated onto a digital micromirror device (DMD) through a molded lens. The pixels of the projected image are controlled by the DMD chip.

[0021] However, the wiring harness inside such a conventional projector is longer, resulting in poor projection results. Such projectors are relatively large, which cannot accommodate the vehicle's space requirements.

[0022] To this end, the present application provides a vehicle-mounted projection device and a vehicle. The housing is configured such that the laser generation unit is arranged on the upper housing and the optical path unit is arranged on the lower housing. A cable receiving groove is provided between the upper and lower housings, so that a second connecting wire harness passes through the cable receiving groove to connect the main control board to the optical path unit. A first connecting wire harness is wound on the outer surface of the upper housing to connect the main control board to the laser generation unit. Compared with the conventional single-layer flat optical path layout, this device has a small volume, which can meet the space requirements of the vehicle. The wiring inside the projection device is shorter without generating signal attenuation, thereby improving the projection effect.

[0023] In the following, a vehicle-mounted projection device in the present embodiment is further explained.

[0024] Fig. 1 is a schematic diagram of the structure of a vehicle-mounted projection device according to an embodiment of the present application; Fig. 2 is a schematic diagram of the wiring layout of a main control board in a vehicle-mounted projection device according to an embodiment of the present application.

[0025] According to the embodiments of the present application, a vehicle-mounted projection device is provided as shown in Fig. 1. As can be seen from Fig. 1 that the vehicle-mounted projection device 10 comprises a housing 100 and a projection assembly 200, wherein the projection assembly 200 comprises a laser generation unit 210, a light path unit 220, a main control board 230 and a connecting wire harness 240, wherein the laser generation unit 210 is designed to emit laser light, wherein the light path unit 220 is configured to image according to the laser light emitted by the laser generation unit 210, wherein the housing 100 comprises a first receiving cavity 110 and a second receiving cavity 120, wherein the first receiving cavity 110 and the second receiving cavity 120 are arranged in a first direction, wherein the first receiving cavity 110 is connected to the second receiving cavity 120 via a light passage opening 130, wherein the main control board 230 and the laser generating unit 210 are arranged in the first receiving cavity 110,wherein the optical path unit 220 is arranged in the second receiving cavity 120, wherein the connecting wire harness 240 comprises a first connecting wire harness 241 and a second connecting wire harness 242, wherein the first connecting wire harness 241 is connected between the main control board 230 and the laser generation unit 210, wherein the second connecting wire harness 242 extends from the first receiving cavity 110 to the second receiving cavity 120 and is connected between the main control board 230 and the optical path unit 220, wherein the first connecting wire harness 241 and the second connecting wire harness 242 are each located outside the light passage opening 130.

[0026] The housing 100 is configured so that the laser generation unit 210 is arranged on the upper housing and the optical path unit 220 is arranged on the lower housing. A cable receiving groove 141 is arranged between the upper and lower housings, so that a second connecting wire harness 242 passes through the cable receiving groove 141 to connect the main control board 230 to the optical path unit 220. A first connecting wire harness 241 is wound on the outside of the upper housing to connect the main control board 230 to the laser generation unit 210. Compared with the conventional single-layer flat optical path layout, this device has a small volume, which can meet the space requirements of the vehicle. The wiring within the projection device 10 is shorter without generating signal attenuation, thereby improving the projection effect.

[0027] Furthermore, it is provided that the laser generation unit 210 is arranged outside the first receiving cavity 110, with the beam path unit 220 being arranged within the second receiving cavity 120. The purpose of this arrangement is that the laser light emitted by the laser generation unit 210 requires a certain distance during the reflection process. The laser generation unit 210 is arranged outside the first receiving cavity 110, thereby creating a larger reflection space for the propagation of the beam path.

[0028] In particular, the laser light source 211 can provide a higher degree of color reproduction, allowing more realistic colors to be displayed. The laser light source 211 has a longer service life. Compared to a conventional incandescent light source, the number of light source replacements can be reduced, thus improving the service life of the vehicle-mounted projection device 10. As an alternative embodiment, it is contemplated that the laser light source 211 can be a monochromatic light source or a tricolor light source, which is not limited in the present embodiment.

[0029] In some embodiments, it is provided that the main control board 230 is arranged on a side of the first receiving cavity 110 facing away from the second receiving cavity 120, wherein the first connecting cable harness 241 and the second connecting cable harness 242 are each connected to an edge region of the main control board 230.

[0030] Furthermore, it is provided that a plurality of interfaces are arranged on the peripheral edges of the main control board 230, so that the main control board 230, the laser generation unit 210, and the optical path unit 220 are connected to each other via the interfaces through the connecting wire harness 140. Specifically, the main control board 230 further includes a video signal processing chip, a memory chip, and the like, which are responsible for controlling and managing the signal input and output, image processing, display control, and the like of the vehicle-mounted projection device 10.

[0031] Furthermore, it is provided that a sealing plate 270 is arranged on the outside of the main control board 230, wherein the sealing plate 270 is connected to the main control board 230 via a copper strip, as shown in Fig. 2. In particular, function keys are arranged on the sealing plate 270 so that the user can perform the settings and adjustments of the projection device using the function keys. As an alternative embodiment, it is contemplated that the key may be a mechanical key or a touch key, which is not limited in the present embodiment. In particular, the function keys include a power button, a home page key, a menu key, a signal source switch, a volume adjustment key, etc.

[0032] In some embodiments, an opening is arranged at an end of the housing 100 facing away from the second receiving cavity 120 in the first direction, wherein the main control board 230 is arranged at the opening, wherein the shape of the main control board 230 is identical to the shape of the opening.

[0033] Furthermore, installation holes are arranged around the main control board 230, and the housing 100 is provided with an installation section for adapting to the installation holes. Specifically, bolts are inserted into the installation holes so that the main control board 230 is firmly connected to the housing 100. The purpose of this design is to achieve better stability through a threaded connection.

[0034] In some embodiments, it is provided that the first connecting cable harness 241 is arranged outside the inner beam path of the laser generation unit 210, and / or, wherein the second connecting cable harness 242 is arranged outside the inner beam path of the beam path unit 220.

[0035] Furthermore, several recesses are provided at the upper edge of the first receiving cavity 110. The first connecting wire harness 241 passes through the recess to connect the main control board 230 to the laser generation unit 210. Thus, the first connecting wire harness 241 is arranged on the outside of the inner beam path of the laser generation unit 210, so that not only can interference with the inner beam path caused by the first connecting wire harness 241 and thus affecting the projection effect be prevented, but disassembly can also be facilitated, thus facilitating later replacement of parts.

[0036] In some embodiments, the laser generation unit 210 comprises a laser light source 211 and a color wheel 212, wherein the color wheel 212 is arranged on a laser light emission path of the laser light source 211 in order to perform color separation of the laser light emitted by the laser light source 211, wherein the first connecting cable harness 241 is arranged outside the laser light emission path.

[0037] Furthermore, the color wheel 212 is connected to a brushless motor via a copper strip. During operation, the color wheel 212 is driven to rotate at high speed by a brushless motor. During the rotation process, filters of different colors arranged on the color wheel 212 are emitted onto the beam path at different times by the laser light from the laser light source 211, thereby forming light beams of different colors. These light beams are ultimately focused and projected onto the screen to form an image.

[0038] In particular, the arrangement order and ratio of the various filters of the color wheel 212 can be set in advance. By detecting the position of the starting point, the motor speed is controlled in real time to determine the type of the current color. In particular, the color wheel 212 has a sensor (not shown in the drawing) so that the starting position of the color wheel 212 is detected by the sensor.

[0039] In some embodiments, the beam path unit 220 comprises a digital micromirror chip 221 and a lens 222, wherein the digital micromirror chip 221 is arranged on the laser light emission path of the laser generation unit 210, wherein the lens 222 is arranged on a reflection beam path of the digital micromirror chip 221, wherein the second connecting cable harness 242 is arranged outside the laser light emission path and the reflection beam path.

[0040] Furthermore, the laser light source 211 generates light beams of different colors through the color wheel 212, and the DMD chip 221 includes numerous small mirrors that can be rotated in a direction. The small mirror is rotated by the DMD chip 221 according to the pixels and colors to be displayed. The pixels and colors to be displayed are reflected onto the lens 222 of the vehicle-mounted projection device 10, and the small mirror not to be displayed is rotated to a different angle. Finally, the light is projected through the lens 222 onto the curtain to form an image.

[0041] In some embodiments, the beam path unit 220 further comprises a plurality of mirrors, wherein the plurality of mirrors are arranged between the laser light source 211 and the digital micromirror chip 221, which are configured to adjust a direction and a path of the laser light emission path of the laser generation unit 210, so as to ensure that the light of the laser generation unit 210 can be received by the lens 222 and the light can be projected onto a screen.

[0042] Furthermore, it is provided that the laser light source 211 and the color wheel 212 are each located on different sides of the housing 100. In order for the light emitted by the laser light source 211 to be received by the color wheel 212, a mirror is arranged between the laser light source 211 and the color wheel 212 to change the propagation path of the beam.

[0043] Furthermore, it is provided that several mirrors are arranged between the color wheel 212 and the DMD chip 221. The purpose of this arrangement is to propagate light rays from the color wheel 212 on the upper layer of the housing 100 to the DMD chip 221 on the lower layer of the housing 100. In particular, a lens for focusing the light rays is also arranged between the several mirrors.

[0044] In some embodiments, it is provided that a separating section 140 is arranged between the first receiving cavity 110 and the second receiving cavity 120, wherein the light passage opening 130 is surrounded by the separating section 140, wherein the separating section 140 has a cable receiving groove 141, wherein the second connecting cable harness 242 extends from the first receiving cavity 110 to the second receiving cavity 120 through the cable receiving groove 141, so that the main control board 230 is connected to the optical path unit 220.

[0045] Furthermore, it is provided that the partition section 140 serves to separate the interior of the housing 100 into a first receiving cavity 110 and a second receiving cavity 120. As an alternative embodiment, it is provided that the partition section 140 can be adjusted in height according to the size of the internal parts of the housing 100 to change the size of the first receiving cavity 110 and the second receiving cavity 120, or can be formed integrally with the housing 100, which has high stability, which is not limited in the present embodiment.

[0046] In some embodiments, the plurality of cable receiving grooves 141 are provided, wherein each cable receiving groove 141 is used for the passage of different second connecting cable harnesses 242.

[0047] Furthermore, it is provided that the plurality of cable receiving grooves 141 are each arranged around the separating section 140, as in Fig. 1. The purpose of this structure is to prevent the second connecting harness 242 from penetrating the interior of the light passage opening 130, thereby blocking the outgoing light path of the light path unit 220, thereby affecting the projection effect.

[0048] Furthermore, the vehicle-mounted projection device 10 further comprises a power control board 250, wherein the power signal line of the vehicle body is connected to the power control board 250 via a power signal connector interface on the outside of the housing 100, so that the entire vehicle-mounted projection device 10 is supplied with power. In particular, a sealing plate 270 is arranged on the outside of the power control board 250, so that dust is prevented from falling into the interior of the vehicle-mounted projection device 10, as shown in Fig. 2 shown.

[0049] Furthermore, a video connector interface is also provided on the exterior of the housing 100, so that the vehicle-mounted projection device is connected to the vehicle body through the connector 260 via the video connector interface. Specifically, for the vehicle-mounted projection device 10, the video can be stored for playback via a USB hard drive or a removable hard drive. Alternatively, the video can be stored directly in the projector itself, or a wireless network can be established in the vehicle. The vehicle-mounted projection device 10 is connected to a wireless network to play online video content.

[0050] Furthermore, it is provided that the vehicle-mounted projection device 10 comprises two heat dissipation fans 280, wherein the two heat dissipation fans 280 are arranged respectively corresponding to the laser light source 211 and the DMD chip to reduce the temperature of the laser light source 211 and the DMD chip to ensure that they can be kept within the temperature range of normal operation, so that an overheating phenomenon for the laser light source 211 and the DMD chip is prevented, as shown in Fig. 1 shown.

[0051] In the present embodiment, the vehicle-mounted projection device 10 comprises a housing 100 and a projection assembly 200, wherein the projection assembly 200 comprises a laser generation unit 210, a beam path unit 220, a main control board 230, and a connecting wiring harness 240, wherein the laser generation unit 210 is designed to emit laser light, wherein the beam path unit 220 is configured to image according to the laser light emitted by the laser generation unit 210, wherein the housing 100 comprises a first receiving cavity 110 and a second receiving cavity 120, wherein the first receiving cavity 110 and the second receiving cavity 120 are arranged in a first direction, wherein the first receiving cavity 110 is connected to the second receiving cavity 120 via a light passage opening 130,wherein the main control board 230 and the laser generation unit 210 are arranged in the first receiving cavity 110, wherein the optical path unit 220 is arranged in the second receiving cavity 120, wherein the connecting wire harness 240 comprises a first connecting wire harness 241 and a second connecting wire harness 242, wherein the first connecting wire harness 241 is connected between the main control board 230 and the laser generation unit 210, wherein the second connecting wire harness 242 extends from the first receiving cavity 110 to the second receiving cavity 120 and is connected between the main control board 230 and the optical path unit 220, wherein the first connecting wire harness 241 and the second connecting wire harness 242 are each located outside the light passage opening 130. The housing 100 is designed such thatThe laser generation unit 210 is arranged on the upper housing, and the optical path unit 220 is arranged on the lower housing. A cable receiving groove 141 is arranged between the upper and lower housings, so that a second connecting wire harness 242 passes through the cable receiving groove 141 to connect the main control board 230 to the optical path unit 220. A first connecting wire harness 241 is wound on the outside of the upper housing to connect the main control board 230 to the laser generation unit 210. Compared to the conventional single-layer flat optical path layout, this device has a small volume, which can meet the space requirements of the vehicle. The wiring within the projection device is shorter without generating signal attenuation, thus improving the projection effect.

[0052] According to the present embodiment, a vehicle is also provided, comprising a vehicle body and a vehicle-mounted projection device 10 arranged on the vehicle body. The concrete structure, function and operating principle of the vehicle-mounted projection device 10 have been explained in detail in the embodiments described above, which will not be repeated here.

[0053] In particular, the vehicle body may include a vehicle-mounted projection bracket in the vehicle, so that the vehicle-mounted projection device 10 can be attached and installed to the vehicle body through the vehicle-mounted projection bracket. Specifically, the vehicle-mounted projection bracket is fixedly mounted on the vehicle roof by an adhesive method, so that the vehicle-mounted projection bracket is connected to the vehicle-mounted projection device through the lower extension bracket of the housing 100.

[0054] As an alternative embodiment, it is provided that the image can be projected onto the curtain by the projection device 10 mounted on the vehicle, wherein the curtain is arranged in a shrinkable manner on the roof of the vehicle.

[0055] Vehicle types include, but are not limited to, sedans, commercial vehicles, RVs, etc. When traveling, the user can turn on the vehicle-mounted projection device 10 to play a movie, providing the user with a better entertainment experience.

[0056] The terms "first," "second," and so on, in the embodiments of the present application are used to distinguish similar items and need not necessarily be used to describe a particular order or sequence. It is understood that the terms so used may be interchangeable, if appropriate, to facilitate the implementation of the embodiments of the present application described herein. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0057] In the embodiments of the present application, the orientation or positional relationships indicated by the terms top, bottom, inside, middle, outside, front, back, etc. are based on the orientation or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to define that the specified devices, elements, or components have a particular orientation or must be constructed and operated in a particular orientation. Some of the above terms may also be used to express other meanings besides the orientation or positional relationships. For example, the term "up" may also be used in some cases to denote a particular dependency or connection relationship.For those skilled in the art, the specific meaning of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] Furthermore, the terms "adjusting," "connecting," and "fastening" are to be understood broadly. The connection may, for example, be a fixed connection, a detachable connection, or formed integrally; it may be a mechanical connection or an electrical connection; it may be a direct connection, an indirect connection via an intermediate medium, or an internal connection between two devices, elements, or components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific circumstances.

[0059] It should be noted that the embodiments mentioned in the description, such as an embodiment, exemplary embodiment, exemplary embodiment, some embodiments, etc., may include certain features, structures, or properties, but not every embodiment necessarily includes these particular features, structures, or properties. Furthermore, such terms do not necessarily refer to the same embodiment. Furthermore, when describing certain features, structures, or properties in connection with embodiments, it is within the scope of the skill of one skilled in the art to implement such features, structures, or properties in connection with other embodiments, whether explicitly described or not explicitly described.

[0060] In general, terms should be understood at least in part by their contextual usage. For example, the term one or more, as used herein, may be used, at least in part, depending on the context, to convey any feature, structure, or property of singular meaning or any combination of features, structures, or properties that can be used to convey plural meaning. Similarly, terms such as a may also be understood, at least in part, depending on the context, to convey singular usage or plural usage.

[0061] Finally, it should be noted that the above embodiments are only illustrative of the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be substituted with equivalents. These modifications or substitutions do not deviate the essence of the respective technical solutions from the scope of the technical solutions of each embodiment of the present application.

Claims

[1] A vehicle-mounted projection device comprising a housing and a projection assembly, characterized by that the projection assembly comprises a laser generating unit, a beam path unit, a main control board and a connecting cable harness, wherein the laser generating unit is designed to emit laser light, wherein the beam path unit is configured to image according to the laser light emitted by the laser generating unit, wherein the housing comprises a first receiving cavity and a second receiving cavity, wherein the first receiving cavity and the second receiving cavity are arranged in a first direction, wherein the first receiving cavity is connected to the second receiving cavity via a light passage opening, wherein the main control board and the laser generation unit are arranged in the first receiving cavity, wherein the optical path unit is arranged in the second receiving cavity, wherein the connecting wire harness comprises a first connecting wire harness and a second connecting wire harness, wherein the first connecting wire harness is connected between the main control board and the laser generation unit, wherein the second connecting wire harness extends from the first receiving cavity to the second receiving cavity and is connected between the main control board and the optical path unit, wherein the first connecting wire harness and the second connecting wire harness are each located outside the light passage opening. [2] Vehicle-mounted projection device according to claim 1, characterized by that the main control board is arranged on a side of the first receiving cavity facing away from the second receiving cavity, wherein the first connecting cable harness and the second connecting cable harness are each connected to an edge region of the main control board. [3] Vehicle-mounted projection device according to claim 2, characterized by that an opening is arranged at an end of the housing which is remote from the second receiving cavity in the first direction, wherein the main control board is arranged at the opening, wherein the shape of the main control board is identical to the shape of the opening. [4] Vehicle-mounted projection device according to one of claims 1 to 3, characterized by that the first connecting cable harness is arranged outside the inner beam path of the laser generation unit, and / or, wherein the second connecting cable harness is arranged outside the inner beam path of the beam path unit. [5] Vehicle-mounted projection device according to claim 4, characterized byin that the laser generating unit comprises a laser light source and a color wheel, wherein the color wheel is arranged on a laser light emission path of the laser light source in order to perform color separation of the laser light emitted from the laser light source, wherein the first connecting cable harness is arranged outside the laser light emission path. [6] Vehicle-mounted projection device according to claim 5, characterized by in that the beam path unit comprises a digital micromirror chip and a lens, wherein the digital micromirror chip is arranged on the laser light emission path of the laser generation unit, wherein the lens is arranged on a reflection beam path of the digital micromirror chip, wherein the second connecting cable harness is arranged outside the laser light emission path and the reflection beam path. [7] Vehicle-mounted projection device according to claim 6, characterized byin that the beam path unit further comprises a plurality of mirrors, wherein the plurality of mirrors are arranged between the laser light source and the digital micromirror chip, which are configured to adjust a direction and a path of the laser light emission path of the laser generating unit, so as to ensure that the light of the laser generating unit can be received by the lens and the light can be projected onto a screen. [8] Vehicle-mounted projection device according to one of claims 1 to 3, characterized bythat a separating portion is arranged between the first receiving cavity and the second receiving cavity, wherein the light passage opening is surrounded by the separating portion, wherein the separating portion has a cable receiving groove, wherein the second connecting cable harness extends from the first receiving cavity to the second receiving cavity through the cable receiving groove, so that the main control board is connected to the optical path unit. [9] Vehicle-mounted projection device according to claim 8, characterized by that the plurality of cable receiving grooves are provided, each cable receiving groove being used for the passage of various second connecting cable harnesses. [10] Vehicle, characterized by that the vehicle has a vehicle-mounted projection device according to one of claims 1 to 9.

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