CN219799978U - Projection device and vehicle-mounted projection system - Google Patents

Abstract

The utility model provides a projection device and a vehicle-mounted projection system. The projection device is configured to have two projection lenses facing opposite directions for projecting images to different sides. The vehicle-mounted projection system comprises a projection device. According to the utility model, through the optimal design and arrangement mode of the projection device, various supported information can be provided for the interior and/or the exterior of the vehicle, diversified display modes can be provided, different requirements of users are met, and the use experience of the users is improved. The in-vehicle projection system integrates a window glass with an imaging layer and a projection device attached to a vehicle component, and is capable of providing various supporting information to the interior and/or exterior of the vehicle without affecting the performance and aesthetics of the window glass and the interior of the cabin itself.

Description

Projection device and vehicle-mounted projection system

The utility model is a divisional application of China patent application No. 202221697022.4, which is filed on the year 2022, month 07 and day 01 and is named as an on-vehicle projection system and a projection device.

Technical Field

The utility model relates to the technical field of vehicles, in particular to a projection device and a vehicle-mounted projection system which is realized by applying the projection device and combining with window glass with a projection function.

Background

With the rapid development of the automobile industry, on-board multimedia technology has been widely appreciated by vehicle manufacturers and favored by consumers. At present, a common vehicle-mounted projection system on the market is mostly applied to a rear windshield of a taxi and is used for projecting advertisement contents to the outside of the vehicle. For most vehicle users or passengers, the manner in which the projected target is the crowd outside the vehicle is not satisfactory for consumer demand for increased entertainment functions of the vehicle.

Disclosure of Invention

The present utility model aims to improve the existing vehicle-mounted projection system, and is expected to provide information images in a diversified manner through window glass, and a projection device and a vehicle-mounted projection system are provided, wherein any supportable information is displayed inside and/or outside a vehicle through a projection device integrated in the vehicle.

To this end, according to an aspect of the present utility model, there is provided a projection apparatus configured to have two projection lenses of opposite orientations for projecting images to different sides.

Embodiments of the present utility model may further include any one or more of the following alternative forms according to the technical idea described above.

In some alternative forms, the projection device is adapted to be attached to a vehicle component and configured to project an image to a different side of the glazing.

In some alternatives, the projection device includes a first projection assembly projecting toward a first direction and a second projection assembly projecting toward a second direction, the first projection assembly and the second projection assembly being centrosymmetric and including a first projection lens and a second projection lens, respectively, with a brightness in the range of 50-1000 lumens.

In some alternatives, the projection device includes a first projection assembly projecting toward a first direction and a second projection assembly projecting toward a second direction, the first projection assembly and the second projection assembly being off-center and including a first projection lens and a second projection lens, respectively, with a brightness in the range of 100-2000 lumens.

In some alternative forms, the projection device is adapted to be disposed within a roof control box or dome lamp control box in a roof position and is configured to project an image in a projection direction from high to low toward at least one window glass.

In some alternative forms, the projection device is adapted to be disposed within a camera housing adjacent to a roof control box or dome control box in a roof position and configured to project an image in a high-to-low projection direction toward at least one window glass.

In some alternative forms, the projection device is adapted to be disposed on a ceiling interior or skylight and is configured to project an image onto at least one window glass in a high-to-low projection direction.

According to another aspect of the present utility model, there is also provided a vehicle-mounted projection system including the above projection device.

In some alternative forms, the projection device is attached to a vehicle component, the vehicle-mounted projection system further comprises a glazing having an imaging layer, the projection device being configured to project an image in at least one projection direction towards at least one glazing to display the projected image through the glazing to the exterior and/or interior of the vehicle, wherein the projection device is configured to be able to project an image towards the glazing on a different side, or towards a different glazing on the same side.

In certain alternative forms, the glazing is a laminated glazing comprising a first glazing body and a second glazing body, and the imaging layer is at least one layer of forward projection imaging material and/or at least one layer of rear projection imaging material sandwiched between the first glazing body and the second glazing body.

According to the utility model, through the optimal design and arrangement mode of the projection device, diversified display modes can be provided, different requirements of users are met, and the use experience of the users is improved. The in-vehicle projection system integrates a window glass with an imaging layer and a projection device attached to a vehicle component, and is capable of providing various supporting information to the interior and/or exterior of the vehicle without affecting the performance and aesthetics of the window glass and the interior of the cabin itself.

Drawings

Other features and advantages of the present utility model will be better understood from the following detailed description of alternative embodiments taken in conjunction with the accompanying drawings, in which like reference characters identify the same or similar parts throughout, and in which:

FIG. 1 is a schematic cross-sectional view of a vehicle glazing having an imaging layer according to one embodiment of the utility model;

FIG. 2 is a schematic cross-sectional view of a vehicle glazing having an imaging layer according to another embodiment of the utility model;

FIG. 3 is a schematic cross-sectional view of a vehicle glazing having an imaging layer according to another embodiment of the utility model;

FIG. 4 is a schematic diagram of a projection device according to one embodiment of the utility model;

FIG. 5 is a schematic view of a projection apparatus according to another embodiment of the present utility model;

fig. 6 is a schematic view of a projection apparatus according to another embodiment of the present utility model.

Detailed Description

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the detailed description and the specific examples, while indicating specific ways of making and using the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. The structural position of the various components as described, such as the directions of up, down, top, bottom, etc., is not absolute, but rather relative. When the individual components are arranged as shown in the figures, these directional expressions are appropriate, but when the position of the individual components in the figures changes, these directional expressions also change accordingly.

The terms "comprising," "including," and "having," and the like, herein, are open ended and do not exclude additional unrecited elements, steps, or components. The expression "consisting of …" excludes any element, step or ingredient not specified. The expression "consisting essentially of …" means that the scope is limited to the specified elements, steps, or components, plus any elements, steps, or components that are optionally present that do not materially affect the basic and novel characteristics of the claimed subject matter. It should be understood that the expression "comprising" encompasses the expressions "consisting essentially of …" and "consisting of …".

The terms "first," "second," and the like herein do not denote a limitation of order or quantity of components, unless otherwise indicated.

Herein, unless specifically limited otherwise, terms such as "mounted," "connected," "attached," and the like are to be construed broadly and may be fixedly connected, detachably connected, or integrally formed, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms herein above will be understood by those skilled in the art as the case may be.

Herein, "outer" and "inner" refer to a direction away from the vehicle body, and "inner" refers to a direction facing the vehicle body, with respect to the vehicle body direction. "front" and "rear" refer to the direction of travel toward the vehicle, and "rear" refers to the direction of travel away from the vehicle, relative to the direction of travel of the vehicle.

Herein, "orthographic projection" refers to a state in which a projection device is mounted on the same side of a window glass as an observer, light emitted from the projection device is projected onto the window glass to form an image, and then the light is reflected to eyes of the observer, which is also called reflective projection, and is generally suitable for projecting an image into a vehicle. "rear projection" refers to the mounting position of the projection device and the observer on both sides of the window pane, and light rays emitted from the projection device are projected from one side of the window pane, and the light rays enter the eyes of the observer on the other side through the window pane, also referred to as transmission projection, and are generally suitable for projecting images to the outside of the vehicle. The projected image is not limited herein, and may be, for example, a still text, a number, a symbol or a picture, or a dynamic video.

Hereinafter, the door glass of a small car will be described mainly with reference to the application of the window glass to the door glass of a car, but it is not excluded that the present utility model can be applied to vehicles such as buses, rail vehicles, airplanes or ships. Also, it should be understood that the window glass according to the present utility model includes, but is not limited to, a front windshield, a rear windshield, a sunroof glass, a door glass or a quarter glass. In the various embodiments described, the thickness of the glass is that commonly used in the art, and the thickness of each laminate structure on the glass is applicable to conventional ranges and is not limited by the illustration. Although shown as a flat glass, the window glass of the present utility model may be a curved glass. In various embodiments, described as a separate glass body or sheet, however, in some undescribed cases, the surface of the glass may also be coated with a special coating to enhance other properties such as thermal insulation and/or comfort.

In the automotive industry where entertainment comfort is growing, window glass with projection functions has been developed and widely used, for example, on the rear windshield of a taxi for delivering pictures or video advertisements. It has been recognized that the projected film on a rear windshield having a projection function is generally of the interior type, and has a lifetime of about 1 to 2 years, and cannot pass the standard conditions of vehicle-standard durability. In addition, the projection film used on the taxi has the defects of low light transmittance, large haze, low resolution, low definition and small visual angle, and if the projection film is applied to occasions such as door glass, the requirements of the light transmittance and the haze required by the door glass cannot be met. In addition, the projector on the taxi is a rear loading frame product, can not pass through the standard conditions of the vehicle standard level durability, can only be controlled by a remote control, and can not communicate with the taxi. It is also desirable for most vehicle users or passengers to have a larger display area and more flexible display means. For example, the left front door glass of the vehicle is projected outwards in an idle period of running (such as charging), so that the function of assisting the driver in body building outside the vehicle is realized.

To this end, according to the inventive concept, a projection device is provided, which is configured to have two projection lenses of opposite orientations for projecting images to different sides. The projection device is applied to an in-vehicle projection system that includes a vehicle window glass having an imaging layer, the projection device being attached to a vehicle component. The projection device is configured to project an image in at least one projection direction toward at least one window glass to display the projected image through the window glass to the exterior and/or interior of the vehicle, wherein the window glass comprises a door glass, such as in certain embodiments, the door glass comprises a left front door glass.

Advantageously, in connection with one embodiment shown in fig. 1, the glazing 100 is a laminated glass comprising a first glass body 110 and a second glass body 120, the first glass body 110 and the second glass body 120 being bonded together by an interlayer 130, the interlayer 130 being for example PVB (polyvinyl butyral) or EVA (ethylene vinyl acetate). The first glass body 110 may be referred to as an outer glass, the second glass body 120 may be referred to as an inner glass, and the imaging layer 140 is laminated between the first glass body 110 and the second glass body 120, for example, between the first glass body 110 and the intermediate layer 130 in fig. 1. Therefore, compared with the existing projection glass in the film-sticking mode, the sandwich structure integrated in the laminated glass can effectively protect projection materials and prolong the service life.

Alternatively, in the embodiment shown in fig. 2, the window glass 200 includes a first glass body 210 and a second glass body 220 similar to fig. 1, except that an imaging layer 240 is laminated between the intermediate layer 230 and the second glass body 220.

In certain embodiments, as shown in fig. 3, the vehicle glazing 300 includes a first glass body 310 and a second glass body 320, with an imaging layer 340 laminated between the first glass body 310 and the second glass body 320 and attached to the first glass body 310 and the second glass body 320 by a first interlayer 330 and a second interlayer 350, respectively.

Regardless of the arrangement, the glazing may comprise one or more imaging layers configured as a projection structure, the imaging layers being selected from at least one front projection imaging material layer and/or at least one rear projection imaging material layer, adapted to transmit light and carry a projected image. As an example, the layer of projection imaging material may be in the form of a film or coating, wherein either the front projection film or the rear projection film may be selected as a projection film with or without a backing. In this way, the window pane can be divided into different functional areas as required in order to achieve different displays of images to the vehicle interior and/or the vehicle exterior, respectively. Advantageously, the thickness of the imaging layer is chosen to be between 5 μm and 400 μm and the structural thickness of the entire glazing is controlled to be between 3.5mm and 6.5mm. By selecting the material properties of the imaging layer, for example, selecting the size and/or distribution of the particle structure of the imaging material layer, the light transmittance properties of the material layer, including the reflectivity, refractive index, absorptivity and other factors, are adjusted, so that the light transmittance of the projection structure is increased and the haze is reduced, the light transmittance of the projection structure is more than 70%, the haze is less than 20, the gain range of the imaging layer to an image is 0.1-1, and a viewer can see a satisfactory projection effect while the structural properties and the aesthetic properties of the window glass are not affected.

To meet the various entertainment and leisure requirements of the user as much as possible, the glazing may be provided with additional functions. In certain embodiments, the glazing further comprises a layer of privacy material attached to a surface of the first or second glass body, or sandwiched between the first and second glass bodies. As an example, the privacy material layer may be in the form of a film or coating. For example, in the case of projecting an image toward the inside of a vehicle, since the inside projection is imaged mainly by diffuse reflection of light on the projection film, adding a privacy structure to the outside of the projection film can not only function as privacy protection but also enhance the display gain effect in the inside. For privacy materials, alternative materials include, for example, privacy glass or black adhesive materials such as black PVB, black EVA, etc., without increasing the thickness of the overall structure. Alternative materials include privacy films, for example, if the thickness of the overall structure can be increased. At this time, the thickness of the whole projection structure is increased by 0.05 mm-1 mm on the original basis.

In some embodiments, the glazing further comprises an acoustic member attached to a surface of the first or second glass body, such as a vibration assembly secured to the glass, to sound the glass by vibration transmission so that the glazing has an acoustic effect, increasing the experience while displaying the projected image.

In some embodiments, the vehicle window glass further comprises a sound-insulating film attached to the surface of the first glass body or the second glass body or sandwiched between the first glass body and the second glass body, so that the whole vehicle achieves better sound-insulating effect. For example, a transparent sound-insulating film is integrated inside a laminated glass together with a projection imaging material layer in a sandwich manner in which the thickness of the entire projection structure is increased by 0.5mm to 1.5mm.

The above description of the vehicle glazing incorporating the imaging layer, in fact, in addition to improving the projection performance of the vehicle glazing, is also an important factor in the installation position of the projector in the on-board projection system of the intelligent cockpit. Because the overall space inside the cabin is smaller, the number of parts is more, and the placement position of the projector is closely related to the size of the projected picture and the quality of the picture, in most cases, the projector needs to communicate with a host factory in advance and confirm the proper placement position of the projector. However, it should be noted that the projection positions of the different window glass projections are also greatly different. In this regard, the present utility model proposes several arrangements for effectively utilizing the interior space of the cabin to meet the projection requirements for different window panes, particularly door panes.

The implementation and use of the in-vehicle projection system of the present utility model will be more clearly understood in conjunction with the following description of various alternative embodiments.

In some embodiments, the projection device is disposed within a roof control box or dome lamp control box in a roof position and is configured to project an image to at least one window glass in a projection direction from high to low. Here, the roof control box or dome control box covers the control box above the cabin location, as well as the control box above the passenger cabin location behind the cabin. Depending on different design requirements, such as size or resolution or brightness requirements for the projected image, the size of the control box may be increased appropriately to accommodate a properly sized projection device. And the projection device is arranged in the control box, so that the heat dissipation channel is convenient to arrange, and the structural design is simplified. In particular, when the projection device is arranged in the roof control box or the ceiling lamp control box, light rays are emitted from a higher position and projected to a lower position below, and when an observer views a projection picture, the sight line is also from high to low, so that the arrangement position can avoid the influence of strong light spots of the light source of the projection device on human eyes, and the observer is more comfortable. In this way, information such as welcome information, body-building video and the like can be projected to the outside, and information which is helpful to a driver, such as weather, electric quantity, oil quantity, tire pressure, navigation and the like, can be projected to the inside, or functions such as entertainment, games, information notification and the like required by the driver or passengers can be realized by the user definition of a vehicle owner.

Fig. 4 schematically illustrates a projection device 400 according to an embodiment, including a housing 410, a movement assembly 420 and a projection lens 430 disposed within the housing 410. To minimize size, the engine assembly 420 may include only the major components of heat dissipation, optics, projection chips, and the like. The projection device 400 may be configured to have a length of 25mm to 200mm, a height of 5mm to 100mm, and a brightness in the range of 50 to 1000 lumens to meet the projection requirements for a single window glass, such as a single-sided door glass.

In a preferred embodiment, the projection device can advantageously be configured with two projection lenses facing in opposite directions for projecting images onto different side window panes, for example onto a front and/or rear windscreen or onto a left and/or right door pane. When the roof control box or the dome lamp control box is arranged at the central position of the roof, the two projection lenses can adopt the same configuration so as to simplify the structure and save the cost. In combination with the projection apparatus 500 of the embodiment shown in fig. 5, the projection apparatus includes a first projection assembly projecting toward the first direction D1 and a second projection assembly projecting toward the second direction D2, where the first projection assembly includes a first housing 510a, a first movement assembly 520a and a first projection lens 530a disposed in the first housing 510a, and the second projection assembly includes a second housing 510b, a second movement assembly 520b and a second projection lens 530b disposed in the second housing 510 b. Here, the projection chips and the projection lens of the first projection assembly and the second projection assembly are respectively integrated into a projection module, and the two projection assemblies are centrosymmetrically arranged and share the assembly 540 with fewer components and integrating the heat dissipation and the optical machine through reasonable arrangement, so that the number of total sub-components is reduced, the total volume is reduced, and the cost is saved. Thus, the projection device 500 of this type may have a size ranging from 50mm to 400mm long, 25mm to 200mm wide, 5mm to 100mm high, and a brightness ranging from 50 to 1000 lumens to meet the low brightness requirements.

When the brightness requirement is high, the projection apparatus 600 of the embodiment shown in fig. 6 similarly includes a first projection assembly projecting toward the first direction D1 and a second projection assembly projecting toward the second direction D2, where the first projection assembly includes a first housing 610a, a first movement assembly 620a and a first projection lens 630a disposed in the first housing 610a, and the second projection assembly includes a second housing 610b, and a second movement assembly 620b and a second projection lens 630b disposed in the second housing 610 b. Due to the increased brightness requirements, the number of components of the heat sink and the optoengine needs to be increased appropriately, and the first projection assembly and the second projection assembly cannot be centrosymmetric but are offset, but still share the heat sink and optoengine integrated assembly 640. Thus, the projection device 600 in this manner may have a size ranging from 50mm to 400mm long, 25mm to 200mm wide, 5mm to 100mm high, and a brightness ranging from 100 to 2000 lumens.

It should be understood that the projection devices illustrated in fig. 4 to 6 may be selected according to actual requirements. For example, as for the door glass, the projection apparatus 400 of fig. 4 may be used to project an image to the front door glass and/or the rear door glass of the left side main driver's seat, or to project an image to the front door glass and/or the rear door glass of the right side co-driver's seat; the projection device 500 of fig. 5 or the projection device 600 of fig. 6 may be used to project an image on left and right front door glass or rear door glass. This greatly expands the application range of the vehicle-mounted projection system of the present utility model.

In some embodiments, the projection device is disposed within a camera housing adjacent to the roof control box or dome light control box and is configured to project an image in a projection direction from high to low toward at least one window glass. Likewise, the projection device of fig. 4 to 6 may be used to project an image on one or both window panes.

It should be understood that although the projection apparatus 500 shown in fig. 5 and the projection apparatus 600 shown in fig. 6 can be used to project images on left and right double-sided front door glass or rear door glass, this does not mean that the projection of images on different sides of the door glass necessarily occurs simultaneously. Depending on the requirements, the projection device can be adjusted by system control (e.g. software control) to project in only one projection direction or simultaneously in two projection directions of opposite orientation.

In certain embodiments, the projection device is disposed within a body pillar, such as an a-pillar or a B-pillar, and is not exclusive of a C-pillar, and is configured to project an image to at least one window glass adjacent the a-pillar or the B-pillar. Depending on the design, the projection device may be arranged in a position above the a-pillar or the B-pillar so as to project an image to at least one window glass in a projection direction from high to low without adversely affecting an observer or an external pedestrian. Alternatively, the projection device may be disposed at the lower position of the a-pillar or the B-pillar or at any position between the upper position and the lower position, as long as the size and the projection angle of the projection device satisfy the requirements of the projection position and the brightness. In this manner, the projection device 400 of FIG. 4 is adapted to project an image onto a single window glass, such as a single-sided door glass.

Since the B pillar is in the middle of the front and rear door glass, the projection device can be configured to simultaneously project different door glass on the same side, for example, to expand the projection angle range of the projection device. If the B-pillar becomes transparent in future intelligent cabins, the entire front and rear door glass forms a large-sized projection display screen that can be used to project more information.

Also, as described above, depending on different needs, the projection device applied to the vehicle body pillar can be controlled by the system (e.g., adjusting the projection angle range, such as rotating the angle of the projection lens) to achieve projection to a single window glass, or projection to different window glasses at the same time.

It will be appreciated that when the projection device is arranged on the a-pillar, the projection device can project either the front windshield or the front door glass, and in some cases the projection device may be arranged to project both the front door glass and the front windshield.

In some embodiments, the projection device is disposed within a door panel or window frame and is configured to project an image to a corresponding door glass. Since the interior space of the door is small and many of the mechanical structures take up a lot of space, the size of the projection device in this manner is a major factor to consider, for example, the projection device 400 of fig. 4 can be used. The projection device can be pre-embedded at any position on the door sheet metal or the window frame adjacent to the door glass, for example, at a position below the door glass, on the premise of affecting the appearance to the minimum extent.

In some embodiments, the projection device is disposed within the seat headrest and is configured to project an image to the door glass on the adjacent side. Here, the seat covers a main driver seat, a co-driver seat, and a rear passenger seat. Also, since the projection device is disposed in the headrest of the seat and projects sideways, the size of the projection device in this manner is also a major factor to be considered, and for example, the projection device 400 of fig. 4 can be used.

In certain embodiments, the projection device is disposed on a ceiling interior or skylight and is configured to project an image in a high-to-low projection direction toward at least one window glass. In this case, the projection apparatus may employ the projection apparatus 400 of fig. 4, and project the window glass on one side by adjusting the projection direction or the projection angle of the projection apparatus, for example, the projection system is provided with a rotation mechanism to be suitable for projecting images on window glass in different directions. In some embodiments, the projection device may employ the projection device 500 of fig. 5 or the projection device 600 of fig. 6, and the projection of the single-sided window glass, or the projection of the window glass on both the left and right sides or both the front and rear sides may be achieved by adjusting the projection direction of the projection device.

Regardless of how the projection device is arranged, in the vehicle-mounted projection system of the present utility model, the projection device communicates with the window glass via the man-machine interaction unit, so that the projection device projects an image onto the window glass in response to a control signal transmitted by the man-machine interaction unit to display the projected image to the outside of the vehicle and/or the inside of the vehicle through the window glass. The human-machine interaction unit may communicate with the window pane and/or the projection device via an external interface and/or a wireless transceiver. Optionally, the external interface includes, but is not limited to, a USB interface, an HDMI interface, and the like. The wireless transceiver includes, for example, a Wi-Fi chip, a bluetooth chip, etc., so as to be communicable with a window glass and/or a projection device having a wireless communication function.

Alternatively, the human-machine interaction unit may include at least one of a human-machine interface (HMI), a head-up display (HUD), and an automatic driving system (ADAS). Alternatively, the human-machine interaction unit may include at least one of a voice module (e.g., microphone), an image module (e.g., camera), a key module (e.g., membrane key, mechanical key), a touch module, a gesture module (e.g., infrared sensor), a remote control module. Therefore, the man-machine interaction unit is used as an input end of the vehicle-mounted projection system, information input by an operator through various modes is fed back to the system and output to the projection device, and further, the information is output to an imaging layer of the vehicle window glass through a projection mode. In particular, for the manner of inward projection on the door glass, various functional operations can be safely and conveniently performed by the driver or passenger, including, for example, but not limited to: air conditioning temperature adjustment, volume adjustment, radio channel switching, etc.

It should be understood herein that the embodiments shown in the figures only show alternative configurations, shapes, sizes and arrangements of the various optional components of the vehicle glazing with the imaging layer and the projection device in the in-vehicle projection system according to the present utility model, which are however illustrative only and not limiting, and that other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the utility model.

While the foregoing has described the technical content and features of the present utility model, it will be appreciated that those skilled in the art, upon attaining the teachings of the present utility model, may make variations and improvements to the concepts disclosed herein, which fall within the scope of the present utility model. The above description of embodiments is illustrative and not restrictive, and the scope of the utility model is defined by the claims.

Claims (10)

1. A projection device configured with two projection lenses of opposite orientation for projecting images to different sides.

2. The projection device of claim 1, wherein the projection device is adapted to be attached to a vehicle component and configured to project images to windows of different sides.

3. The projection device of claim 1, comprising a first projection assembly projecting in a first direction and a second projection assembly projecting in a second direction, the first projection assembly and the second projection assembly being centrosymmetric and comprising a first projection lens and a second projection lens, respectively, and having a brightness in the range of 50-1000 lumens.

4. The projection device of claim 1, comprising a first projection assembly projecting in a first direction and a second projection assembly projecting in a second direction, the first projection assembly and the second projection assembly being off-center and comprising a first projection lens and a second projection lens, respectively, and having a brightness in the range of 100-2000 lumens.

5. The projection device of any one of claims 1 to 4, wherein the projection device is adapted to be arranged within a roof control box or a dome control box in a roof position and configured to project an image in a projection direction from high to low onto at least one window glass.

6. The projection device of any one of claims 1 to 4, wherein the projection device is adapted to be disposed within a camera housing adjacent to a roof control box or a dome control box in a roof position and configured to project an image to at least one window glass in a projection direction from high to low.

7. The projection device of any one of claims 1 to 4, wherein the projection device is adapted to be arranged on a ceiling interior or a sunroof and is configured to project an image to at least one window glass in a projection direction from high to low.

8. An in-vehicle projection system, characterized in that it comprises a projection device according to any one of claims 1 to 7.

9. The vehicle-mounted projection system of claim 8, wherein the projection device is attached to a vehicle component, the vehicle-mounted projection system further comprising a window pane having an imaging layer, the projection device configured to project an image in at least one projection direction onto at least one window pane to display the projected image through the window pane to the exterior and/or interior of the vehicle, wherein the projection device is configured to be able to project an image onto a different side window pane or onto a different window pane on the same side.

10. The vehicle projection system of claim 9, wherein the vehicle glazing is a laminated glazing comprising a first glass body and a second glass body, and the imaging layer is at least one front projection imaging material layer and/or at least one rear projection imaging material layer sandwiched between the first glass body and the second glass body.