CN218446361U

CN218446361U - Vehicle, display device, and projection system

Info

Publication number: CN218446361U
Application number: CN202222145013.0U
Authority: CN
Inventors: 吴超; 陈孟浩; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2022-08-15
Filing date: 2022-08-15
Publication date: 2023-02-03
Anticipated expiration: 2032-08-15

Abstract

The application discloses a vehicle, a display device and a projection system. The display device comprises a scattering film with polarization maintaining property, a first polarization film and a first transparent plate, wherein the scattering film, the first polarization film and the first transparent plate are sequentially stacked. In this way, this application display device can reduce the projection light luminance who sees through the diffusion barrier, prevents that the display content from revealing, has strengthened the privacy nature of projection.

Description

Vehicle, display device, and projection system

Technical Field

The present application relates to the field of projection device technology, and in particular, to a vehicle, a display device, and a projection system.

Background

The projection system generally comprises a projection imaging system, an image source, an illumination system and the like, and images are finally projected onto a white screen or a white wall through the projection system. The car window projection projects the final image onto the semitransparent car window glass, so that the original use function of the car window is kept, and the car window can be additionally used as display equipment.

The image projected by the vehicle window is provided for people in the vehicle to watch, but the current vehicle window has transparency, the display device as a projection system is unsafe, and people can see the projected image through the vehicle window from the outside of the vehicle, thereby influencing the privacy of the vehicle window projection.

SUMMERY OF THE UTILITY MODEL

The technical problem that this application mainly solved provides a vehicle, display device and projection system, can promote the projected privacy nature of door window.

In order to solve the technical problem, the application adopts a technical scheme that: provided is a display device including a diffusion film having a polarization maintaining property, a first polarizing film, and a first transparent plate, the diffusion film, the first polarizing film, and the first transparent plate being sequentially stacked.

In order to solve the above technical problem, another technical solution adopted by the present application is: provided is a display device including a diffusion film having a polarization maintaining property, a first polarizing film, a first transparent plate, and a second transparent plate, which are sequentially stacked.

In order to solve the above technical problem, the present application adopts another technical solution that: there is provided a projection system comprising:

the projection device is arranged on one side, away from the first polarizing film, of the scattering film and used for emitting polarized light rays to the scattering film.

the display device comprises a first transparent plate, a first polarizing film, a scattering film with polarization maintaining property, a first polarizing film and a second transparent plate which are sequentially stacked;

the first projection equipment is arranged on one side of the first transparent plate;

and the second projection equipment is arranged on one side of the second transparent plate.

in order to solve the above technical problem, the present application adopts another technical solution: there is provided a projection system comprising:

the display device comprises a first transparent plate, a first polarization film, a scattering film with polarization maintaining property, a first polarization film and a second transparent plate which are sequentially stacked;

A vehicle is provided that includes a projection system provided herein.

The beneficial effect of this application is: the display device of the present application includes a diffusion film having a polarization maintaining property, a first polarizing film, and a first transparent plate, which are sequentially stacked. The diffusion film is used for receiving light from an external projection device and displaying an image so as to achieve the purpose of projection. The first polarizing film is arranged on the other side of the imaging side of the scattering film, namely the back of the imaging surface of the scattering film, and the polarized light emitted by the projection equipment sequentially passes through the scattering film and the first polarizing film and then is reduced in brightness after passing through the first polarizing film. Therefore, the brightness of the backlight of the scattering film is reduced by the first polarizing film, the projected image is difficult to observe from the back of the scattering film, the leakage of the projection information displayed by the display device is prevented, and the privacy of projection is improved.

Drawings

FIG. 1 is a side schematic view of an embodiment of a vehicle according to the present application;

FIG. 2 is a schematic structural diagram of the vehicle of the embodiment of FIG. 1;

FIG. 3 is a schematic view of a first embodiment of a projection system of the present application;

FIG. 4 is a schematic view of a second embodiment of a projection system of the present application;

FIG. 5 is a schematic diagram of a third embodiment of a projection system of the present application;

FIG. 6 is a schematic diagram of a projection system according to a fourth embodiment of the present application;

FIG. 7 is a schematic diagram of a fifth embodiment of a projection system of the present application;

FIG. 8 is a schematic view of a projection system according to a sixth embodiment of the present application

Fig. 9 is a schematic structural diagram of a seventh embodiment of the projection system of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Referring to fig. 1 and 2, fig. 1 is a schematic side view of an embodiment of a vehicle according to the present application, and fig. 2 is a schematic structural view of the vehicle according to the embodiment of fig. 1.

In this embodiment. The vehicle 10 includes a projection system 11. The projection system 11 is capable of projecting images in various surfaces of the vehicle 10 for navigation, audiovisual, gaming, etc. functions. The vehicle 10 may be an automobile, truck, bus, caravan, or the like.

In this embodiment, the projection system 11 may project on a window of the vehicle 10, and the projection image is not observed outside the vehicle 10, thereby effectively ensuring privacy of projection. The projection system 11 is a projection system provided herein, and the projection system of the present invention can be applied not only to vehicles, but also to ships, airplanes, commercial projection devices, and the like in other embodiments. For the projection system of the present application, please refer to the following description of embodiments of the projection system.

In the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 3, fig. 3 is a schematic structural diagram of a projection system according to a first embodiment of the disclosure. In the present embodiment, the projection system includes a projection apparatus 100 and a display apparatus 200. The projection device 100 is capable of emitting projection light, and the display device 200 receives the projection light emitted by the projection device 100 and displays a corresponding image.

When the projection system of the present application is applied to a vehicle, the display device 200 may be any plane in the vehicle, and the embodiments of the present application are described by taking a window as an example.

The display device 200 specifically includes a scattering film 210 and a first polarizing film 220. Wherein the diffuser film 210 is disposed opposite the projection device 100, the diffuser film 210 may receive light from the projection device 100, a portion of the light may generate scattered light and be imaged, and another portion may transmit through the diffuser film 210.

The first polarizing film 220 is disposed on the other side of the scattering film 210 that is opposite to the side of the projection device 100, and light transmitted through the scattering film 210 can be incident into the first polarizing film 220.

In this embodiment, the light emitted from the projection apparatus 100 is polarized light, the scattering film 210 has a polarization maintaining function, and after the polarized light passes through the scattering film 210 and enters the first polarizing film 220, the power density of the light decreases, and then the brightness of the polarized light after entering the first polarizing film 220 decreases, even an extinction phenomenon occurs.

The first polarizing film 220 is disposed on the back surface of the diffusion film 210, with the image side of the diffusion film 210 being the front surface. Due to the effect of the first polarizing film 220 on the polarized light, it is difficult to observe the projected image information from the rear surface side of the scattering film 210.

In this embodiment, the light emitted from the projection device 100 is linearly polarized light, and the linearly polarized light should enter the diffusion film 210 perpendicularly.

Alternatively, the light emitted from the projection apparatus 100 may be set to be completely linearly polarized light, and the polarization direction of the first polarizing film 220 is perpendicular to the completely linearly polarized light emitted from the projection apparatus 100, so that the power density of the light after the completely linearly polarized light enters the first polarizing film 220 is minimized, and the optimal extinction effect is achieved.

Alternatively, the first polarizing film 220 may be selected as an absorption polarizer or a reflection polarizer. When the first polarizing film 220 is an absorptive polarizer, it can absorb part of the light emitted from the projection apparatus 100, and prevent flare of reflected light. When the first polarizing film 220 is a reflective polarizer, it is possible to prevent the first polarizing film 220 from absorbing excessive light to cause an excessively high temperature.

Alternatively, the projection device 100 may include a first projector 110 and a polarizing member 120, wherein the light emitted from the first projector 110 is unpolarized light, a light outlet of the first projector 110 is opposite to the polarizing member 120, and the light emitted from the first projector 110 passes through the polarizing member 120 and becomes polarized light, and then enters the display device 200. The polarizing element 120 may be a polarizing plate or a PCS (polarization conversion system).

In other embodiments, projection device 100 may also include an LCoS projector, a 3LCD projector, or a liquid crystal projector such as a single LCD, which may emit linearly polarized light without the need for polarizer 120.

Further referring to fig. 3, in the present embodiment, the display apparatus 200 may further include a first transparent board 230 and a second transparent board 240. The first transparent plate 230 is disposed on the light incident side of the diffuser film 210, that is, the side of the diffuser film 210 close to the projection apparatus 100, and the second transparent plate 240 is disposed on the side of the first polarizer film 220 away from the diffuser film 210, that is, the first transparent plate 230, the diffuser film 210, the first polarizer film 220, and the second transparent plate 240 are sequentially stacked in the light path direction. The first and second

transparent plates

230 and 240 serve to protect and fix the diffusion film 210 and the first polarizing film 220, and in some embodiments, the refractive index of the first transparent plate 230 may also be greater than that of air to magnify an image made by the diffusion film 210.

Alternatively, the first transparent board 230 and the second transparent board 240 may be glass, pc transparent board, pvc transparent board, ps transparent board, pmma transparent board, acryl transparent board, or other transparent boards.

When the projection system of the present embodiment is applied to a vehicle, the first transparent board 230 and the second transparent board 240 may correspond to both inner and outer glass of a window of the vehicle. The light emitted from the projection apparatus 100 is not observed from the second transparent plate 240 side due to the first polarizing film 220, preventing the image on the diffusion film 210 from being observed by the vehicle exterior personnel.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a projection system according to a second embodiment of the present application. The projection system includes a projection apparatus 100 and a display apparatus 200, similar to the first embodiment. The projection apparatus 100 emits linearly polarized light, which the display apparatus 200 receives to display a corresponding image.

The projection apparatus 100 may include the first projector 110 and the polarizer 120, or may be a projector capable of emitting linearly polarized light by itself. The display device 200 specifically includes a diffusion film 210, a first polarizing film 220, and a first transparent plate 230. Diffuser film 210 is positioned opposite projection device 100, and diffuser film 210 may receive light from projection device 100, some of which may produce scattered light and form an image, and some of which may pass through diffuser film 210.

The scattering film 210 has a polarization maintaining function, and after the polarized light passes through the scattering film 210 and enters the first polarizing film 220, the power density of the light is reduced, and then the brightness of the polarized light after entering the first polarizing film 220 is reduced, even an extinction phenomenon is generated.

The first transparent plate 230 is disposed on a side of the first polarizing film 220 away from the diffusion film 210, that is, the diffusion film 210, the first polarizing film 220, and the first transparent plate 230 are sequentially stacked in the optical path direction, wherein positions of the first transparent plate 230 and the second transparent plate 240 may be replaced.

Further, the display apparatus 200 may further include a second transparent plate 240, and the first and second

transparent plates

230 and 240 serve to protect and fix the diffusion film 210 and the first polarization film 220. The second transparent plate 240 is disposed on a side of the first transparent plate 230 away from the first polarizing film 220, that is, the scattering film 210, the first polarizing film 220, and the first and second

transparent plates

230 and 240 are sequentially stacked in the optical path direction, wherein positions of the first and second

transparent plates

230 and 240 may be replaced.

The positional relationship of the first transparent board 230 and the second transparent board 240 of the present embodiment is changed compared to the first embodiment. When the present embodiment is applied to a vehicle, the first transparent plate 230 and the second transparent plate 240 may correspond to two glass layers inside and outside a window of the vehicle, and the diffusion film 210 and the first polarization film 220 are disposed on a side of the glass inside the window close to the inside of the vehicle, which is more suitable for the aftermarket of the automobile industry chain.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a projection system according to a third embodiment of the present application. In the present embodiment, the projection system includes a projection apparatus 100 and a display apparatus 200. The projection device 100 is capable of emitting projection light, and the display device 200 receives the projection light emitted by the projection device 100 and displays a corresponding image.

Specifically, in the present embodiment, the light emitted from the projection apparatus 100 is circularly polarized light, and the first polarization film 220 corresponds to a first polarization film of the circularly polarized light.

Alternatively, the first polarizing film 220 may be selected as an absorption polarizer or a reflection polarizer. When the first polarizing film 220 is an absorbing polarizer, a portion of the light emitted from the projection apparatus 100 may be absorbed to avoid flare of the reflected light. When the first polarizing film 220 is a reflective polarizer, it is possible to prevent the first polarizing film 220 from absorbing excessive light to cause an excessively high temperature.

In order for the projection apparatus 100 to generate circularly polarized light, on the basis of the first embodiment, the projection apparatus 100 under the present embodiment may include the first projector 110, the polarizing member 120, and the 1/4 wave plate 130.

The light outlet of the first projector 110 is opposite to the polarization member 120, and the polarization member 120 and the 1/4 wave plate 130 are sequentially disposed along the optical path of the emergent light of the first projector 110. The light emitted from the first projector 110 passes through the polarizer 120 and then becomes linearly polarized light, and passes through the 1/4 wave plate 130 and then becomes circularly polarized light.

Further, the display apparatus 200 may further include a first transparent board 230 and a second transparent board 240. The first and second

transparent plates

230 and 240 serve to protect and fix the diffusion film 210 and the first polarization film 220. The first transparent plate 230 and the second transparent plate 240 may be respectively disposed on the light incident side of the scattering film 210 and the side of the first polarizing film 220 away from the scattering film 210, that is, the first transparent plate 230, the scattering film 210, the first polarizing film 220, and the second transparent plate 240 are sequentially stacked along the light path direction; the first polarizing film 220 may be disposed on a side of the first polarizing film 220 away from the diffusion film 210, that is, the diffusion film 210, the first polarizing film 220, the first transparent plate 230, and the second transparent plate 240 may be sequentially stacked in the optical path direction.

In this embodiment, the light emitted from the projection apparatus 100 is circularly polarized light, and the light emitted from the projection apparatus 100 does not need to enter the radiation scattering film 210 perpendicularly by using the circularly polarized light, which is convenient for the installation of the projection apparatus 100.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a projection system according to a fourth embodiment of the present application. In this embodiment, the projection system includes a projection device 100 and a display device 200. The projection device 100 is capable of emitting projection light, and the display device 200 receives the projection light emitted by the projection device 100 and displays a corresponding image.

Among them, the display apparatus 200 includes a diffusion film 210, a first polarizing film 220, a first transparent plate 230, and a second transparent plate 240.

Diffuser film 210 is positioned opposite projection device 100, and diffuser film 210 may receive light from projection device 100, some of which may produce scattered light and form an image, and some of which may pass through diffuser film 210. The first polarizing film 220 is disposed on the other side of the scattering film 210 that is opposite to the side of the projection device 100, and light transmitted through the scattering film 210 can be incident into the first polarizing film 220.

In this embodiment, the light emitted from the projection apparatus 100 is polarized light, the scattering film 210 has a polarization maintaining function, and after the polarized light penetrates through the scattering film 210 and enters the first polarizing film 220, the power density of the light decreases, and then the brightness of the polarized light after entering the first polarizing film 220 decreases, even an extinction phenomenon occurs.

The first polarizing film 220 is provided on the back surface of the diffusion film 210, with the image side of the diffusion film 210 being the front surface. Due to the effect of the first polarizing film 220 on polarized light, it is difficult to observe projected image information from the rear surface side of the scattering film 210.

Alternatively, the first polarizing film 220 may be selected as an absorption polarizer or a reflection polarizer. When first polarizing film 22 is an absorptive polarizer, it may absorb some of the light exiting projection device 100 and avoid the creation of flare in the reflected light. When the first polarizing film 220 is a reflective polarizer, it is possible to prevent the first polarizing film 220 from absorbing excessive light to cause an excessively high temperature.

The first and second

transparent plates

230 and 240 serve to protect and fix the diffusion film 210 and the first polarization film 220. The first transparent plate 230 and the second transparent plate 240 may be respectively disposed on the light incident side of the scattering film 210 and the side of the first polarizing film 220 away from the scattering film 210, that is, the first transparent plate 230, the scattering film 210, the first polarizing film 220, and the second transparent plate 240 are sequentially stacked in the light path direction; the first polarizing film 220 may be disposed on a side away from the diffusion film 210, that is, the diffusion film 210, the first polarizing film 220, the first transparent plate 230, and the second transparent plate 240 may be sequentially stacked in the optical path direction.

Further, the projection apparatus 100 in this embodiment includes a short-focus projector that may emit polarized light by itself, or a polarizer is provided at a light exit of the short-focus projector to cause the projection apparatus 100 to emit polarized light. The short-focus projector has a short projection distance, and the distance from the projection apparatus 100 to the diffusion film 210 can be shortened. The short-focus projector in this embodiment is fixed to one end of the first transparent board 230 or the second transparent board 240, so that the projection device 100 and the display device 200 can be integrated, and the occupied space in the vehicle is reduced. The projection system embodiment can be applied to window projection in a vehicle, and can also be applied to any glass plane in the vehicle as a transparent display.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a fifth embodiment of the projection system of the present application, and similar to the first embodiment, the projection system in this embodiment includes a projection device 100 and a display device 200, the projection device 100 is capable of emitting projection light, and the display device 200 receives the projection light emitted by the projection device 100 and displays a corresponding image.

The display device 200 specifically includes a scattering film 210, a first polarizing film 220, and a second polarizing film 250. Wherein the diffuser film 210 is disposed opposite the projection device 100, the diffuser film 210 may receive light from the projection device 100, a portion of the light may generate scattered light and be imaged, and another portion may transmit through the diffuser film 210.

In this embodiment, the second polarizing film 250 is disposed on a side of the scattering film 210 close to the projection device 100, that is, on the light incident side of the scattering film 210, and before the light emitted from the projection device 100 enters the scattering film 210, the light first passes through the second polarizing film 250 and then enters the scattering film 210 to form an image. The first polarizing film 220 is disposed on the back of the diffuser film 210 with the image side of the diffuser film 210 as the front side, and the second polarizing film 250, the diffuser film 210, and the first polarizing film 220 are sequentially disposed along the direction of the light emitted from the projection apparatus 100.

The second polarizing film 250 has a polarizing function, and light emitted from the projection apparatus 100 enters the second polarizing film 250, becomes polarized light, and enters the diffusion film 210. The diffusion film 210 has a polarization maintaining function, and polarized light transmitted through the diffusion film 210 maintains its original polarization state and enters the first polarization film 220. The power density of the polarized light entering the first polarizing film 220 is decreased, and then the brightness of the polarized light entering the first polarizing film 220 is decreased, even an extinction phenomenon occurs.

The first polarizing film 220 is disposed on the back surface of the diffusion film 210, with the image side of the diffusion film 210 being the front surface. Due to the effect of the first polarizing film 220 on polarized light, it is difficult to observe projected image information from the rear surface side of the scattering film 210.

Since the second polarizing film 250 has a polarizing function, natural light on the side of the diffusion film 210 changes its polarization state after passing through the second polarizing film 250, and the brightness decreases after passing through the first polarizing film 220. Therefore, in the projection apparatus 100 of the present embodiment, the brightness of light viewed from the first polarizing film 220 side to the diffusion film 210 side is also reduced in the non-operation state, and when the present embodiment is applied to a vehicle, the first polarizing film 220 is closer to the outside of the vehicle than the diffusion film 210, and it is difficult to view light inside the vehicle from the outside of the vehicle, which further enhances privacy inside the vehicle.

Alternatively, the second polarizing film 250 may be disposed between the scattering film 210 and the first polarizing film 220, and after the light emitted from the projection apparatus 100 enters the scattering film 210, the light first passes through the second polarizing film 250 and then enters the first polarizing film 220. The diffuser film 210, the second polarizing film 250, and the first polarizing film 220 are sequentially disposed in the direction of light emitted from the projection apparatus 100.

Alternatively, the projection device 100 may itself emit polarized light. The projection apparatus 100 may include a first projector 110 and a polarizing member 120, wherein light emitted from the first projector 110 is unpolarized light, a light outlet of the first projector 110 is opposite to the polarizing member 120, and the light emitted from the first projector 110 passes through the polarizing member 120 to be polarized and then enters the display apparatus 200. The polarizing element 120 may be a polarizing plate or a PCS (polarization conversion system).

In other embodiments, the projection device 100 may also include an LCoS projector, a 3LCD projector, or a single LCD liquid crystal projector, which may emit linearly polarized light without the polarizer 120.

Since the second polarization film 250 has a polarizing function, the light emitted from the projection apparatus 100 in this embodiment may also be unpolarized light, and the polarizing element 120 may not be disposed in the projection apparatus 100.

Further, the display apparatus 200 may further include a first transparent board 230 and a second transparent board 240. The first transparent plate 230 is disposed on the light incident side of the second polarizing film 250, that is, the side of the second polarizing film 250 close to the projection apparatus 100, and the second transparent plate 240 is disposed on the side of the first polarizing film 220 far away from the scattering film 210, that is, the first transparent plate 230, the second polarizing film 250, the scattering film 210, the first polarizing film 220, and the second transparent plate 240 are sequentially stacked in the light path direction. The first and second

transparent plates

Alternatively, the first transparent plate 230 and the second transparent plate 240 may also be disposed on a side of the first polarizing film 220 away from the scattering film 210, that is, the second polarizing film 250, the scattering film 210, the first polarizing film 220, the first transparent plate 230, and the second transparent plate 240 are sequentially stacked in the light path direction.

When the present embodiment is applied to a vehicle, the first transparent plate 230 and the second transparent plate 240 may correspond to two glass layers inside and outside a window of the vehicle, and the second polarizing film 250, the diffusion film 210, and the first polarizing film 220 are more suitable for the aftermarket of the automobile industry chain when the second polarizing film 250, the diffusion film 210, and the first polarizing film 220 are disposed on the side of the window inner glass close to the inside of the vehicle.

The present embodiment is to add a second polarizing film 250 to the display device 200, compared to the first embodiment. The second polarization film 250 can change the polarization state of the emergent light and other in-vehicle light transmitted through the projection apparatus 100, and the brightness of the light is reduced after the light is transmitted through the first polarization film 220 of the in-vehicle projection system, so that the in-vehicle light is difficult to observe by the outside personnel of the vehicle, and the privacy of the vehicle is effectively enhanced.

Referring to fig. 8, fig. 8 is a schematic structural diagram of a projection system according to a sixth embodiment of the present application.

Similar to the fifth embodiment, the projection system in this embodiment includes a projection device 100 and a display device 200, and the display device 200 specifically includes a diffusion film 210, a first polarizing film 220, a first transparent plate 230, a second transparent plate 240, and a second polarizing film 250.

The projection device 100 can emit projection light, the diffusion film 210 is arranged opposite to the projection device 100, the diffusion film 210 can receive the light from the projection device 100, one part of the light generates diffusion light and is imaged, and the other part of the light penetrates through the diffusion film 210.

In contrast to the fifth embodiment, the second polarizing film 250 in this embodiment is located on the side of the diffuser film 210 away from the projection device 100, i.e. between the diffuser film 210 and the first polarizing film 220.

After the diffuser film 210 receives light from the projection device 100, a portion of the light is scattered and imaged, and another portion is transmitted through the diffuser film 210. The light transmitted through the diffusion film 210 passes through the second polarizing film 250 and the first polarizing film 220 in sequence, and becomes polarized light after passing through the second polarizing film 250, and the polarized light is decreased in brightness after passing through the first polarizing film 220.

Therefore, the brightness of the light transmitted through the display device 200 is reduced by the light applied by the second polarizing film 250 and the first polarizing film 220, and it is difficult to observe the projected image information from the rear side of the diffuser film 210.

Since the second polarizing film 250 has a polarizing function, natural light changes its polarization state after passing through the second polarizing film 250, and brightness decreases after passing through the first polarizing film 220. Therefore, in the projection apparatus 100 of the present embodiment, the brightness of light observed from the first polarizing film 220 side to the diffusion film 210 side also decreases in the non-operating state, and when the present embodiment is applied to a vehicle, the first polarizing film 220 is closer to the outside of the vehicle than the diffusion film 210, and light in the vehicle is difficult to observe from the outside of the vehicle, which further enhances privacy inside the vehicle.

Alternatively, the projection device 100 may itself emit polarized light. The projection apparatus 100 may include a first projector 110 and a polarizer 120, wherein light emitted from the first projector 110 is unpolarized light, a light outlet of the first projector 110 is opposite to the polarizer 120, and the light emitted from the first projector 110 passes through the polarizer 120, is changed into polarized light, and then enters the display apparatus 200. The polarizing element 120 may be a polarizing plate or a PCS (polarization conversion system).

Further, the display apparatus 200 may further include a first transparent board 230 and a second transparent board 240. The first transparent plate 230 is disposed on the light incident side of the diffuser film 210, that is, the side of the diffuser film 210 close to the projection apparatus 100, and the second transparent plate 240 is disposed on the side of the first polarizer film 220 far from the diffuser film 210, that is, the first transparent plate 230, the diffuser film 210, the second polarizer film 250, the first polarizer film 220, and the second transparent plate 240 are sequentially stacked in the light path direction. The first and second

transparent plates

Alternatively, the first transparent plate 230 and the second transparent plate 240 may also be disposed on a side of the first polarizing film 220 away from the scattering film 210, that is, the scattering film 210, the second polarizing film 250, the first polarizing film 220, the first transparent plate 230, and the second transparent plate 240 are sequentially stacked in the light path direction.

When the present embodiment is applied to a vehicle, the first transparent plate 230 and the second transparent plate 240 may correspond to two layers of glass inside and outside a window of the vehicle, and the second polarizing film 250, the diffusion film 210, and the first polarizing film 220 are more suitable for the aftermarket of the automobile industry chain when the second polarizing film 250, the diffusion film 210, and the first polarizing film 220 are disposed on the side of the glass inside the window close to the inside of the vehicle.

Compared with the fifth embodiment, the brightness of the projection light of the projection device 100 can be reduced, and the brightness of other light in the vehicle can be reduced, so that the light in the vehicle is difficult to observe by the vehicle outside, and the privacy of the vehicle is effectively enhanced.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a seventh embodiment of a projection system of the present application, and in this embodiment, the projection system includes a projection device 100 and a display device 200. The projection device 100 is capable of emitting projection light, and the display device 200 receives the projection light emitted by the projection device 100 and displays a corresponding image.

The display device 200 specifically includes a diffusion film 210 and a first polarizing film. Wherein the diffuser film 210 may receive light from the projection device 100, a portion of the light produces scattered light and is imaged, and another portion is transmitted through the diffuser film 210.

Specifically, the projection apparatus 100 in the present embodiment includes a first projection apparatus 140 and a second projection apparatus 150, and the display apparatus 200 includes a diffusion film 210, a first polarizing film 220, a first transparent plate 230, a second transparent plate 240, and a second polarizing film 250.

The first transparent plate 230 and the second transparent plate 240 may be respectively disposed on a light incident side of the diffusion film 210 and a side of the first polarizing film 220 away from the diffusion film 210, and the first transparent plate 230, the first polarizing film 220, the diffusion film 210, the second polarizing film 250, and the second transparent plate 240 are stacked.

The first projection device 140 is disposed on one side of the first transparent plate 230, and the second projection device 150 is disposed on one side of the second transparent plate 240, that is, the first projection device 140 and the second projection device 150 are respectively disposed on two sides of the diffuser film 210, and both the first projection device 140 and the second projection device 150 can emit projection light and form images on two sides of the diffuser film 210.

The first polarizing film 220 and the second polarizing film 250 may be disposed on both sides of the diffusion film 210 by means of adhesion, lamination, or the like. The first projection device 140 is disposed on a side of the first polarizing film 220 away from the diffuser film 210, and the second projection device 150 is disposed on a side of the second polarizing film 250 away from the diffuser film 210.

Taking the projected light from the first projection device 140 as an example, the light from the first projection device 140 first passes through the first polarization film 220 and then is polarized into the scattering film 210, and forms an image in the scattering film 210. Since the diffusion film 210 has polarization maintaining properties, polarized light transmitted through the diffusion film 210 maintains its original polarization state. The polarized light transmitted through the diffusion film 210 is then incident into the second polarizing film 250, and the optical power density decreases by the action of the polarizing film 220b, so that an image cannot be observed from the second polarizing film 250 side, while a projected image of the first projection device 140 can be observed on the first polarizing film 220 side.

Similarly, the light emitted from the second projection device 150 first passes through the second polarization film 250, and then is polarized to enter the scattering film 210, and is imaged in the scattering film 210. Since the diffusion film 210 has polarization maintaining properties, polarized light transmitted through the diffusion film 210 maintains its original polarization state. The polarized light transmitted through the diffusion film 210 is then incident into the first polarizing film 220, and the optical power density decreases by 220b, so that an image cannot be observed from the first polarizing film 220 side, while a projected image from the second projection device 150 can be observed from the second polarizing film 250 side.

Further, the display apparatus 200 may further include a first transparent board 230 and a second transparent board 240. The first transparent plate 230 is connected to the first polarizing film 220, the second transparent plate 240 is connected to the second polarizing film 250, and the first transparent plate 230, the first polarizing film 220, the diffusion film 210, the second polarizing film 250, and the second transparent plate 240 are sequentially stacked.

Optionally, the first and second

transparent plates

230 and 240 are used to protect and fix the diffusion film 210, the first and second

polarizing films

220 and 250, and in some embodiments, the refractive index of the first or second

transparent plates

230 or 240 may also be greater than that of air to magnify the image made by the diffusion film 210.

Alternatively, the first and

second projection devices

140 and 150 may be short-focus projectors. The short-focus projector has a short projection distance, and the distance from the projection apparatus 100 to the diffusion film 210 can be shortened. In this embodiment, the first projection device 140 and the second projection device 150 are respectively fixed at one end of the first transparent board 230 or the second transparent board 240, so that the projection device 100 and the display device 200 can be integrated, and the occupied space in the vehicle is reduced. The projection system embodiment can be applied to window projection in a vehicle, and can also be applied to any glass plane in the vehicle as a transparent display.

In this embodiment, the two sides of the diffusion film 210 are both provided with the polarizing film and the projector, so that the two-way projection of the diffusion film 210 can be realized, and the projections at the two ends do not affect each other, so that different image contents can be displayed.

In summary, the present application provides embodiments of a vehicle and a projection system, which utilize the characteristics of polarized light, and can effectively avoid the projection content from being observed from the back of the projection side, thereby protecting the projection security and privacy.

In the description of the present application, reference to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, mechanism, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, mechanisms, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.

Claims

1. A display device is characterized by comprising a scattering film with polarization maintaining property, a first polarizing film and a first transparent plate, wherein the scattering film, the first polarizing film and the first transparent plate are sequentially stacked.

2. The display device according to claim 1,

the display device further comprises a second transparent plate, and the second transparent plate is arranged on one side, away from the first polarizing film, of the first transparent plate.

3. The display device according to claim 1 or 2,

the display device further comprises a second polarizing film arranged on one side of the scattering film far away from the first polarizing film; or

The second polarizing film is disposed between the scattering film and the first polarizing film.

4. A display device is characterized by comprising a scattering film with polarization maintaining property, a first polarizing film, a first transparent plate and a second transparent plate, wherein the first transparent plate, the scattering film, the first polarizing film and the second transparent plate are sequentially stacked.

5. The display device according to claim 4,

the display device further includes a second polarizing film disposed between the first transparent plate and the scattering film; or

6. A projection system, comprising:

a projection device and a display device as claimed in any one of claims 1 to 5, the projection device being provided on a side of the diffuser film remote from the first polarizing film for emitting polarized light rays to the diffuser film.

7. The projection system of claim 6,

the projection equipment further comprises a 1/4 wave plate, and the 1/4 wave plate is arranged on the light-emitting side of the projection equipment.

8. The projection system of claim 6,

the projection equipment comprises a short-focus projector, and the short-focus projector is fixed at one end of the first transparent plate.

9. A projection system, comprising:

10. A vehicle comprising a projection system as claimed in any one of claims 6 to 9.