Projection film, projection system, vehicle window, and vehicle

Abstract

The present disclosure provides a projection film, a projection system, a vehicle window and a vehicle. The projection film comprises: a transmission film having a first surface and a second surface arranged oppositely, the transmission film having a transmission function; a plurality of convex parts arranged at intervals on the first surface of the transmission film and extending away from the first surface; the plurality of convex parts having a scattering function for scattering first polarized light projected onto the plurality of convex parts into non-polarized light and transmitting the non-polarized light through the transmission film; the first surface exposed between the plurality of convex parts for transmitting the first polarized light projected thereon through the transmission film; and a polarized film attached to the second surface of the transmission film, the polarized film having a polarized function for blocking the first polarized light from transmitting through the polarized film and transmitting second polarized light in the non-polarized light through the polarized film. According to the technology of the present disclosure, the effectiveness and the permeability of the projection film can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of projection imaging technology, and more particularly to a projection film, a projection system, a car window, and a vehicle. Background Technology

[0002] Currently, projection films used in car window projection include electrochromic films and matte films. While electrochromic films, when switched to opaque mode, produce a good image when projected onto the screen, the complete blockage of light prevents passengers from seeing the outside environment, creating a feeling of claustrophobia. Ordinary matte films, on the other hand, partially scatter light, allowing some ambient light to pass through and enabling passengers to see. However, this also causes direct projector light to penetrate, interfering with the projected image and potentially harming the eyes of pedestrians in the outside environment. Utility Model Content

[0003] This disclosure provides a projection film, a projection system, a car window, and a vehicle, with the aim of solving the technical problems in the prior art where direct light from the projector can damage the human eye through the projection film and the projection film cannot transmit external images.

[0004] According to one aspect of this disclosure, a projection film is provided, comprising:

[0005] A transmission membrane has a first side and a second side arranged opposite to each other, and the transmission membrane has a transmission function;

[0006] Multiple protrusions are spaced apart on the first surface of the transmission film and extend in a direction away from the first surface; the multiple protrusions have a scattering function, used to scatter the first type of polarized light projected onto the multiple protrusions into unpolarized light and transmit it through the transmission film; the first surface exposed between the multiple protrusions is used to transmit the first type of polarized light projected onto it through the transmission film.

[0007] A polarizing film is attached to the second side of the transmission film. The polarizing film has a polarization function and is used to block the transmission of first-type polarized light through the polarizing film, and to allow second-type polarized light in unpolarized light to pass through the polarizing film.

[0008] In one embodiment, the plurality of protrusions include hemispheres and / or polyhedra.

[0009] In one embodiment, the first surface includes an imaging area and a non-imaging area, and a plurality of protrusions are disposed in the imaging area.

[0010] In one embodiment, at least some of the protrusions are spaced differently from their adjacent protrusions.

[0011] In one embodiment, the surfaces of the plurality of protrusions are non-smooth surfaces.

[0012] In one embodiment, the transmission film, the polarizing film, and the plurality of protrusions are made of a transparent material.

[0013] In one embodiment, the first type of polarized light is S-polarized light, and the second type of polarized light is P-polarized light;

[0014] Alternatively, the first type of polarized light is P-polarized light, and the second type of polarized light is S-polarized light.

[0015] According to another aspect of this disclosure, a projection system is provided, comprising:

[0016] The projection film of any embodiment of this disclosure;

[0017] A projector, including a light source for projecting first-type polarized light toward a first surface of a transmission film and a plurality of protrusions.

[0018] According to another aspect of this disclosure, a vehicle window is provided, comprising:

[0019] The projection film of any embodiment of this disclosure;

[0020] The window body has an inner surface facing the vehicle interior and an outer surface facing the vehicle exterior, with the inner surface bonded to a polarizing film of the projection film.

[0021] According to another aspect of this disclosure, a vehicle is provided, comprising:

[0022] Vehicle window according to any embodiment of this disclosure;

[0023] The projector, located inside the vehicle body, includes a light source for projecting first-type polarized light toward a first surface of the transmission film and multiple protrusions.

[0024] According to the technology disclosed herein, the performance and transparency of projection films can be improved.

[0025] It should be understood that the description in the utility model description section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0026] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. In the drawings, the same or similar reference numerals denote the same or similar elements, wherein:

[0027] Figure 1 A schematic diagram of the structure of a projection film according to an embodiment of the present disclosure is shown;

[0028] Figure 2 This diagram illustrates the application of a projection film according to an embodiment of the present disclosure;

[0029] Figure 3 A schematic diagram of the structure of the transmission film of the projection film according to an embodiment of the present disclosure is shown;

[0030] Figure 4 A schematic diagram of the structure of a projection system according to an embodiment of the present disclosure is shown;

[0031] Figure 5 A schematic diagram of the structure of a vehicle window according to an embodiment of the present disclosure is shown. Detailed Implementation

[0032] The exemplary embodiments of this disclosure are described below with reference to the accompanying drawings, including various details of the embodiments to aid understanding, and should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this disclosure. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0033] like Figures 1 to 3 As shown, this embodiment of the disclosure provides a projection film 100 for displaying images, videos, text, etc. projected onto it by a projector.

[0034] The projection film 100 specifically includes a transmission film 1, multiple protrusions 2, and a polarizing film 3.

[0035] The transmission membrane 1 has a first surface 11 and a second surface 12 arranged opposite to each other, and the transmission membrane 1 has a transmission function.

[0036] Multiple protrusions 2 are spaced apart on the first surface 11 of the transmission film 1 and extend in a direction away from the first surface 11. The multiple protrusions 2 have a scattering function, used to scatter first-type polarized light projected onto the multiple protrusions 2 into unpolarized light and transmit it through the transmission film 1. The first surface 11 exposed between the multiple protrusions 2 is used to transmit first-type polarized light projected onto it through the transmission film 1.

[0037] The polarizing film 3 is attached to the second surface 12 of the transmission film 1. The polarizing film 3 has a polarization function, which is used to block the transmission of first type polarized light through the polarizing film 3, and to allow second type polarized light in unpolarized light to be transmitted through the polarizing film 3.

[0038] According to the embodiments of this disclosure, it should be noted that:

[0039] The transmission film 1 itself enables light projected onto it to pass through. Specifically, the light projected by the light source passes through the first surface 11 of the transmission film 1, the interior of the transmission film 1, and the second surface 12 of the transmission film 1 in sequence, so that the light reaches the surface of the polarizing film 3 near the side of the transmission film 1.

[0040] The light source can be understood as the structure of the projected light from a projector. The first type of polarized light can specifically be P-polarized light or S-polarized light. Which type of polarized light is projected depends on which type of polarization the polarizing film 3 can block, absorb, or filter. That is, the projected polarized light is consistent with the polarization that the polarizing film 3 can block. For example, if the polarizing film 3 can block P-polarized light but transmit S-polarized light, then the first type of polarized light projected by the light source is P-polarized light. Conversely, if the polarizing film 3 can block S-polarized light but transmit P-polarized light, then the first type of polarized light projected by the light source is S-polarized light.

[0041] The number, shape, size, arrangement, and specific arrangement of the multiple protrusions 2 disposed on the first surface 11 of the transmission film 1 can be selected and adjusted as needed. For example, the multiple protrusions 2 are arranged at intervals, which can be understood as being evenly distributed on the first surface 11, or not evenly distributed on the first surface 11. Furthermore, the multiple protrusions 2 can be disposed in a portion of the first surface 11, or in all areas of the first surface 11. Moreover, the multiple protrusions 2 can be hemispherical, polyhedral, or even irregularly shaped protrusions.

[0042] Multiple protrusions 2 scatter first-type polarized light projected onto them into unpolarized light. For example, first-type polarized light projected onto the multiple protrusions 2 is scattered into first-type polarized light and second-type polarized light.

[0043] After multiple protrusions 2 are provided on the transmission film 1, the structure formed by the two has the function of simultaneously transmitting and scattering the first type of polarized light projected by the light source. That is, a part of the first type of polarized light projected by the light source is scattered into unpolarized light through the multiple protrusions 2, while another part of the first type of polarized light projected by the light source is directly transmitted through the first surface 11 exposed between the multiple protrusions 2.

[0044] The polarizing film 3 blocks first-type polarized light from passing through itself, while allowing second-type polarized light, including unpolarized light from the natural environment and unpolarized light scattered by the multiple protrusions 2, to pass through. One of the opposite sides of the polarizing film 3 is attached to the second side 12 of the transmission film 1, and the other side is attached to a transparent material structure. The transparent material structure can be, for example, transparent glass or a transparent plastic sheet.

[0045] The projection film 100 of this embodiment can be installed on vehicle doors and windows, building windows, etc. The polarizing film 3 faces pedestrians in the external environment, while the transmission film 1 faces people inside the vehicle or building. When the light source of a projector projects onto the projection film 100, people on opposite sides of the projection film 100 can see the image displayed on it. However, the image seen by people on opposite sides is mirrored. The projector's imaging can be adjusted as needed to ensure that people on one side see the correct image; no specific limitation is made here.

[0046] According to the embodiments of this disclosure, since the plurality of protrusions 2 are spaced apart and the polarizing film 3 allows second-type polarized light to pass through, the second-type polarized light in the unpolarized light in the external environment can pass through the polarizing film 3 and the first surface 11 of the transmission film 1 exposed between the plurality of protrusions 2 in sequence, so that a person located on one side of the transmission film 1 can see the external environment through the entire projection film 100 while the projection film 100 displays the projected image to the outside world, thus maintaining the transparency of the projection film 100.

[0047] According to embodiments of this disclosure, since the polarizing film 3 allows second-type polarized light to pass through while blocking first-type polarized light from passing through, the first-type polarized light projected by the light source, after passing through the first surface 11 between the multiple protrusions 2 and penetrating the transmission film 1, is blocked by the polarizing film 3. Furthermore, the first-type polarized light in the unpolarized light scattered by the multiple protrusions 2 is also blocked by the polarizing film 3. This prevents people in the external environment from seeing the first-type polarized light directly projected by the light source when looking at the projection film 100, thus avoiding the situation where direct light from the light source shines on the eyes and causes harm. Simultaneously, since people in the external environment do not see the first-type polarized light directly projected by the light source, the imaging effect of the real image projected by the light source on the projection film 100 can be further improved, resulting in a clearer image and higher contrast.

[0048] In one embodiment, the plurality of protrusions 2 include hemispheres and / or polyhedra. Specifically, the plurality of protrusions 2 can all be hemispheres, all be polyhedra, or a portion can be hemispheres and another portion can be polyhedra. The number of faces of the polyhedra and the spherical curvature of the hemispheres are not specifically limited here, as long as they can achieve the function of scattering the first type of polarized light arriving at the protrusions into unpolarized light.

[0049] In one implementation, such as Figure 3 As shown, the first surface 11 includes an imaging region A and a non-imaging region B, and a plurality of protrusions 2 are disposed in the imaging region A.

[0050] In one implementation, such as Figure 3As shown, at least some of the protrusions 2 have different intervals with their adjacent protrusions. That is, the protrusions 2 are arranged irregularly and non-periodically on the first surface 11. This avoids image quality degradation caused by optical interference effects on the projection film 100.

[0051] In one embodiment, the surfaces of the plurality of protrusions 2 are non-smooth surfaces. This facilitates the scattering of first-type polarized light projected by the light source by the plurality of protrusions 2.

[0052] In one embodiment, the transmission film 1, the polarizing film 3, and the plurality of protrusions 2 are made of a transparent material.

[0053] In one embodiment, the first type of polarized light is S-polarized light, and the second type of polarized light is P-polarized light.

[0054] Alternatively, the first type of polarized light is P-polarized light, and the second type of polarized light is S-polarized light.

[0055] In one example, such as Figure 2 As shown, the working principle of the projection film 100 is illustrated using the example of S-polarized light projected by the light source of the projector (black dashed arrow in the figure):

[0056] The projector's light source projects S-polarized light. When this light reaches the inner transmission film 1, it is scattered into unpolarized light at the multiple protrusions 2. This unpolarized light (scattered light) includes both S-polarized and P-polarized light (the solid red arrows in the diagram), with the P-polarized light being the second type of polarized light. When this unpolarized light penetrates the transmission film 1 and reaches the polarization film 3, the S-polarized light is blocked by the polarization film 3, while the P-polarized light, which satisfies the transmission requirements of this layer, passes through the polarization film 3. The real image on the projection film 100 is observed from the outside through this transmitted P-polarized light. The S-polarized light is directly blocked by the outer polarizer, making it invisible from the outside. Therefore, the projector's light does not interfere with the real image and will not harm the eyes of people in the external environment.

[0057] Simultaneously, an external object 400 emits unpolarized light (P-polarized light indicated by the solid red arrow and S-polarized light indicated by the dashed black arrow in the diagram). After reaching the outer polarization film 3, the S-polarized light is blocked by the polarization film 3, leaving only the P-polarized light to penetrate it. Then, part of the P-polarized light, because it does not penetrate the multiple protrusions 2, directly penetrates the transmission film 1 and is seen by a person on one side of the film (i.e., seeing the external object and the external environment). The other part of the P-polarized light is projected onto the multiple protrusions 2 and is scattered.

[0058] like Figure 4 As shown, this disclosure provides a projection system, including:

[0059] Projection film 100 according to any embodiment of the present disclosure.

[0060] The projector 200 includes a light source for projecting first-type polarized light toward a first surface 11 of the transmission film 1 and a plurality of protrusions 2.

[0061] like Figure 5 As shown, this disclosure provides a vehicle window, including:

[0062] Projection film 100 according to any embodiment of the present disclosure.

[0063] The window body 300 has an inner surface facing the interior of the vehicle and an outer surface facing the exterior of the vehicle, with the inner surface bonded to the polarizing film 3 of the projection film.

[0064] This disclosure provides a vehicle, including:

[0065] Vehicle window according to any embodiment of this disclosure.

[0066] The projector, located inside the vehicle body, includes a light source for projecting first-type polarized light toward the first surface 11 of the transmission film 1 and a plurality of protrusions 2.

[0067] In one example, such as Figure 2 As shown, the working principle of the projection film is illustrated using S-polarized light (black dashed arrow in the figure) projected by the light source of the projector as an example:

[0068] The projector's light source projects S-polarized light. When this light reaches the inner transmission film 1, it is scattered into unpolarized light at the multiple protrusions 2. This unpolarized light (scattered light) includes both S-polarized and P-polarized light (the solid red arrows in the diagram), with the P-polarized light being the second type of polarized light. When this unpolarized light penetrates the transmission film 1 and reaches the polarizing film 3, the S-polarized light is blocked by the polarizing film 3, while the P-polarized light, which satisfies the transmission requirements of this layer, passes through the polarizing film 3. Pedestrians outside the vehicle observe the real image on the projection film through this transmitted P-polarized light. The S-polarized light is directly blocked by the outer polarizer, so pedestrians outside the vehicle cannot observe the S-polarized light emitted directly from the projector. Therefore, the projector's light does not interfere with the real image, nor does it shine into the eyes of pedestrians outside the vehicle, causing harm.

[0069] Simultaneously, an external object 400 emits unpolarized light (P-polarized light indicated by the solid red arrow and S-polarized light indicated by the dashed black arrow in the diagram). After reaching the outer polarization film 3, the S-polarized light is blocked by the polarization film 3, leaving only the P-polarized light to penetrate it. Then, part of the P-polarized light, because it does not penetrate the multiple protrusions 2, directly penetrates the transmission film 1 and is seen by the passengers inside the vehicle (i.e., they see the external object and the external environment). The other part of the P-polarized light is projected onto the multiple protrusions 2 and is scattered.

[0070] In the description of this specification, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this disclosure, "multiple" means two or more, unless otherwise explicitly specified.

[0072] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0073] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0074] The foregoing disclosure provides many different implementations or examples for carrying out different structures of this disclosure. To simplify the disclosure, specific examples of components and arrangements have been described above. Of course, these are merely examples and are not intended to limit the scope of this disclosure. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0075] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A projection film, characterized in that, include: A transmission film having a first side and a second side disposed opposite to each other, the transmission film having a transmission function; Multiple protrusions are spaced apart on the first surface of the transmission film and extend in a direction away from the first surface; the multiple protrusions have a scattering function, used to scatter first type polarized light projected onto the multiple protrusions into unpolarized light and transmit it through the transmission film; the first surface exposed between the multiple protrusions is used to transmit the first type polarized light projected onto it through the transmission film. A polarizing film is attached to the second surface of the transmission film. The polarizing film has a polarization function, which is used to block the first type of polarized light from being transmitted through the polarizing film and to allow the second type of polarized light in the unpolarized light to be transmitted through the polarizing film.

2. The projection film according to claim 1, characterized in that, The plurality of protrusions include hemispheres and / or polyhedra.

3. The projection film according to claim 1, characterized in that, The first surface includes an imaging area and a non-imaging area, and the plurality of protrusions are disposed in the imaging area.

4. The projection film according to claim 1, characterized in that, At least some of the protrusions have different spacings from their adjacent protrusions.

5. The projection film according to claim 1, characterized in that, The surfaces of the plurality of protrusions are non-smooth surfaces.

6. The projection film according to claim 1, characterized in that, The transmission film, the polarizing film, and the plurality of protrusions are made of a transparent material.

7. The projection film according to any one of claims 1 to 6, characterized in that, The first type of polarized light is S-polarized light, and the second type of polarized light is P-polarized light; Alternatively, the first type of polarized light is P-polarized light, and the second type of polarized light is S-polarized light.

8. A projection system, characterized in that, include: The projection film as described in any one of claims 1 to 7; A projector, including a light source for projecting first-type polarized light toward the first surface of the transmission film and the plurality of protrusions.

9. A vehicle window, characterized in that, include: The projection film as described in any one of claims 1 to 7; The window body has an inner surface facing the vehicle interior and an outer surface facing the vehicle exterior, the inner surface being bonded to the polarizing film of the projection film.

10. A vehicle, characterized in that, include: The vehicle window as described in claim 9; A projector, located inside the vehicle body, includes a light source for projecting first-type polarized light toward the first surface of the transmission film and the plurality of protrusions.

Images