Projection curtain, image system and vehicle

Abstract

The invention discloses a projection curtain, an image system and a vehicle. The projection curtain comprises a base material; the optical structure is arranged on the base material and comprises a plurality of groups of optical subareas, the plurality of groups of optical subareas are sequentially arranged along the same circle center, each optical subarea comprises a plurality of microstructures, the plurality of microstructures are arranged along the extension direction of the optical subarea, each microstructure is provided with a side peripheral wall and a top wall, one end of the side peripheral wall is connected to the base material, and the other end of the side peripheral wall is connected to the top wall. The top wall is connected to the other end of the side peripheral wall and is provided with a reflecting layer, the reflecting layer of each micro-structure is used for projecting a picture of the projector to the eye box area, and the side peripheral wall of each micro-structure obliquely extends towards the direction close to the center of the micro-structure in the direction away from the base material. According to the projection curtain provided by the embodiment of the invention, by adopting the structural design, the incident light of the projector can be directionally enhanced, the influence of stray light in the environment on projection is reduced, the projection image quality and definition are improved, and the use experience of a user is improved.

Description

Technical Field

[0001] This invention relates to the field of projection technology, and more specifically, to a projection screen, an imaging system, and a vehicle. Background Technology

[0002] Projection display uses the principle of optical amplification to display small images on a large projection surface, increasing the viewing impact and subjective experience, while maintaining a small projector size, making it easy to place and move. Compared to screen display, the projection surface of the projection display solution inherently has eye-protecting characteristics and is less prone to eye fatigue, providing a very good user experience.

[0003] However, during actual viewing, there will be the effect of ambient light reflection. Ambient light comes from all directions, and under the enhanced light of the diffuse reflection screen, it will overlap with the projected content, indirectly reducing the contrast of the projected content and affecting the projected image quality. There is room for improvement. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a projection screen that can reduce the impact of stray light from the environment on projection, thereby improving projection image quality and clarity.

[0005] According to a first aspect of the present invention, a projection screen includes: a substrate; an optical structure disposed on the substrate and including multiple optical partitions arranged sequentially along the same center, each optical partition including multiple microstructures arranged along the extension direction of the optical partition in which it is located, wherein each microstructure has a side peripheral wall and a top wall, one end of the side peripheral wall is connected to the substrate, the top wall is connected to the other end of the side peripheral wall and has a reflective layer, the reflective layer of each microstructure is used to project the image of the projector onto the eye box area, and the side peripheral wall of each microstructure extends obliquely toward the center of the microstructure in a direction away from the substrate.

[0006] According to the projection screen of the present invention, by adopting the above-described structural design, the incident light from the projector can be directionally enhanced, the influence of stray light in the environment on the projection can be reduced, the projection image quality and clarity can be improved, and the user experience can be enhanced.

[0007] In some embodiments, the sidewalls of each of the microstructures have a first light-absorbing layer.

[0008] In some embodiments, the sidewalls of each microstructure unfold into a wavy fan-shaped ring.

[0009] In some embodiments, the reflective layer is an anti-reflective coating.

[0010] In some embodiments, the top wall is an inclined surface inclined to the surface of the substrate, and extends inclinedly from the direction close to the substrate toward the direction away from the center of the circle.

[0011] In some embodiments, the substrate has a second light-absorbing layer, which is located at least on the side of the substrate closest to the optical structure.

[0012] In some embodiments, the system further includes: a plurality of sound-permeable holes disposed on the substrate and penetrating the substrate along the thickness direction of the substrate, wherein the sound-permeable holes are located between adjacent plurality of the microstructures.

[0013] In some embodiments, the optical structure further includes an outer layer structure disposed on the side of the optical structure opposite to the substrate, wherein the outer layer structure is a light-transmitting element.

[0014] In some embodiments, the side of the outer layer structure facing away from the optical structure has a wear-resistant coating.

[0015] The imaging system according to a second aspect of the present invention includes a projection screen according to a first aspect of the present invention. By adopting the above-described structural design, the incident light from the projector can be directionally enhanced, the influence of stray light in the environment on the projection can be reduced, the projection image quality and clarity can be improved, and the user experience can be enhanced.

[0016] In some embodiments, the device further includes a projector located on one side of the projection screen closer to the center.

[0017] In some embodiments, the device further includes a display screen, one side of which is a display side, and the projector is located on the other side of the display screen.

[0018] In some embodiments, the system further includes a speaker located on one side of the projection screen and on the side of the substrate opposite to the optical structure.

[0019] According to a third aspect of the present invention, a vehicle includes a projection screen according to a first aspect of the present invention or an imaging system according to a second aspect of the present invention. By adopting the above-described structural design, the incident light of the projector can be directionally enhanced, the influence of stray light in the environment on the projection can be reduced, the projection image quality and clarity can be improved, and the user experience can be enhanced.

[0020] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of an imaging system according to some embodiments of the present invention from one viewpoint;

[0023] Figure 2 yes Figure 1 The center circle shows a magnified view of point A;

[0024] Figure 3 This is a schematic diagram of an imaging system according to some embodiments of the present invention from another perspective;

[0025] Figure 4 yes Figure 3 The center circle shows a magnified view of point B.

[0026] Figure 5 These are schematic diagrams of microstructures according to some embodiments of the present invention;

[0027] Figure 6 This is a partial schematic diagram of an optical structure according to some embodiments of the present invention;

[0028] Figure 7 This is a projection diagram of a projection screen according to some embodiments of the present invention;

[0029] Figure 8 This is a schematic diagram of a vehicle according to some embodiments of the present invention.

[0030] Figure label:

[0031] Projection screen 100, imaging system 200, vehicle 300.

[0032] Substrate 10, second light-absorbing layer 11, sound-transmitting hole 12,

[0033] Optical structure 20, optical partition 201, microstructure 21, side peripheral wall 211, top wall 212, reflective layer 22, first light-absorbing layer 23

[0034] Outer structure 30, cavity 301, wear-resistant coating 31,

[0035] Projector 40, display screen 50, eye box area 60. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Conventional projection methods mainly include long-throw projection and ultra-short-throw projection. Long-throw projection has a relatively simple projector structure and small size, but it has a high projection ratio, which requires a high installation distance and position. It also has a light amplification effect, and even slight disturbance to the projector will cause the projection surface to shake significantly, greatly affecting the viewing clarity. Ultra-short-throw projection adds a reflective prism at the light emission point to achieve a lower projection ratio. It can project a very large image at a very close projection distance, and because the light path is shorter, there is no significant vibration amplification effect. At the same time, since the projector can be placed close to one side of the projection screen, it can avoid the impact of light propagation path obstruction on the image display.

[0040] Since the projected content needs to rely on the diffuse reflection of the projection screen to display the content of the projected image, the higher the diffuse reflectance of the projection screen, the clearer the projected image. However, since ambient light comes from all directions, under the enhanced light of the diffuse reflection screen, it will overlap with the projected content, indirectly reducing the contrast of the projected content and affecting the projected image quality.

[0041] Therefore, this application proposes a projection screen 100 that can enhance light in a specific direction while reducing reflection in other directions, thereby enhancing the viewing contrast in a fixed area and improving the projection image quality and clarity.

[0042] The following is for reference. Figures 1-8 The projection screen 100 according to an embodiment of the present invention is described. The projection screen 100 can be used in an imaging system 200, which can be used in a vehicle 300 or in other scenarios such as a home.

[0043] like Figures 1-7 As shown, a projection screen 100 according to an embodiment of the present invention includes: a substrate 10 and an optical structure 20. The optical structure 20 is disposed on the substrate 10 and includes multiple optical partitions 201. The multiple optical partitions 201 are arranged sequentially along the same center. Each optical partition 201 includes multiple microstructures 21. The multiple microstructures 21 are arranged along the extension direction of the optical partition 201 in which they are located. Each microstructure 21 has a reflective layer 22.

[0044] The optical structure 20 is a concentric ring array. All optical sections 201 are arranged in a ring-like manner with the same center as the reference, in order of increasing radius, forming a layered optical surface of concentric fan rings. Each group of optical sections 201 is a segment of fan ring; multiple groups of optical sections 201 are fan rings with different radii. The projection screen 100 can be square, and multiple groups of optical sections 201 can adopt different central angles.

[0045] By adopting a concentric arrangement, from the side of the projection screen 100 closest to the center to the other edge, each optical zone 201 has a corresponding reflective layer 22 for each radius increment, so that light from the same projector can be reflected to the same viewing area without aberration, thereby ensuring that the entire image is reflected to the user's eyes without any breaks.

[0046] Specifically, each microstructure 21 has a side wall 211 and a top wall 212. One end of the side wall 211 is connected to the substrate 10, and the top wall 212 is connected to the other end of the side wall 211. The top wall 212 has a reflective layer 22. The reflective layer 22 of each microstructure 21 is used to project the image of the projector 40 onto the eye box area 60. The eye box refers to the three-dimensional space range within which the user's head can move. Within this range, the driver's eyes can see the image projected by the projection screen completely and clearly.

[0047] Furthermore, along the direction away from the substrate 10, the sidewalls 211 of each microstructure 21 extend obliquely towards the center of the microstructure 21, such as... Figure 4 As shown, the end of the sidewall 211 of two adjacent microstructures 21 near the substrate 10 (e.g.) Figure 4 Part of the rear end (as shown) abuts against the other end of the side peripheral wall 211 of the two adjacent microstructures 21 (as shown) Figure 4The front end shown is arranged at intervals, with a gap between the side peripheral walls 211 of two adjacent microstructures 21, along the direction away from the substrate 10 (e.g., Figure 4 As shown from back to front, the cross-sectional dimensions (i.e., the cross-section parallel to the substrate 10) of the microstructure 21 gradually decrease, thus forming a shape with gradually changing cross-sectional dimensions for each microstructure 21. The incident light from the projector 40 is reflected by the reflective layer 22 to the eye box region 60. Ambient light parallel to the incident light can be incident on the side wall 211. The light incident on the side wall 211 can be refracted into the microstructure 21, reducing the probability of ambient light being reflected to the eye box region 60, reducing the impact of ambient light on the projection, and improving the projection image quality and clarity.

[0048] According to the embodiment of the present invention, the projection screen 100, by adopting the above-described structural design, can directionally enhance the incident light of the projector 40, reduce the impact of stray light in the environment on the projection, improve the projection image quality and clarity, and enhance the user experience.

[0049] like Figure 4 As shown, in some embodiments, the sidewall 211 of each microstructure 21 has a first light-absorbing layer 23. The first light-absorbing layer 23 can be a water-based acrylic coating, a vacuum-deposited black film, a solvent-based high-black coating, a black optical adhesive, etc. By setting the first light-absorbing layer 23 on the sidewall 211 of the microstructure 21, most of the ambient light incident on the sidewall 211 can be absorbed, and some of the unabsorbed ambient light can also penetrate the first light-absorbing layer 23 and be refracted in the microstructure 21, thereby further reducing the probability of ambient light being reflected to the eye box area 60, further reducing the impact of ambient light on the projection, and improving the projection image quality and clarity.

[0050] In some embodiments, the sidewalls 211 of each microstructure 21 unfold into a wavy fan ring, meaning that the microstructure 21 is not a traditional frustum structure. The slope of the sidewalls of a frustum structure is fixed, while the slope of the microstructure 21 varies with the size away from the substrate 10. The generatrix of the microstructure 21 can be approximately convex arc-shaped away from the central axis of the microstructure 21, increasing the surface area of ​​the outer wall 211 of the microstructure 21 and increasing the area that can be exposed to ambient light. Specifically, by calculating the aspect ratio and half-peak width of various types of light in the visible light range, the sidewalls 211 of the microstructure 21 are designed to give the microstructure 21 a reflective effect for directional light path transmission. Stray light in the environment is absorbed and refracted after passing through the surface of the microstructure 21, reducing the probability of ambient light being reflected to the eye box region 60.

[0051] In some embodiments, the reflective layer 22 is an anti-reflection film. The anti-reflection film achieves high reflectivity through the interference effect of multiple media, which is used to enhance the reflection of light of a specific wavelength. That is, by setting the anti-reflection film, the light is reflected significantly, and more of the reflected light is reflected back to the eye box area 60, thereby improving the projection image quality and clarity.

[0052] The antireflective coating here can be a titanium dioxide thin film. By designing the film thickness, when light is incident from a low-refractive-index medium (air) onto the titanium dioxide thin film, the incident light will undergo constructive interference at the thin film-microstructure 21 interface and the air-thin film interface, thereby enhancing the reflectivity of a specific wavelength. Through the interference principle, the reflectivity of visible light is "pushed up", allowing more of the reflected light to be reflected back to the eye box region 60. At the same time, with the help of the first light-absorbing layer 23 of the side peripheral wall 211, ambient light that should not be reflected is absorbed, thereby achieving the dual effects of antireflection and anti-light.

[0053] like Figure 4 As shown, in some embodiments, the top wall 212 is an inclined surface inclined to the surface of the substrate 10, and along the direction away from the center, the top wall 212 moves from the direction close to the substrate 10 toward the direction away from the substrate 10 (i.e., as shown). Figure 4 As shown, it extends obliquely from back to front; correspondingly, the reflective layer 22 is designed with an oblique angle, such as... Figure 4 As shown, the reflective layer 22 gradually tilts forward from right to left, which helps to reflect the incident light from the projector 40 to the eye box area 60. The tilt angle is precisely calculated according to the direction of the incident light. Using the Fresnel structure principle, the incident light is enhanced in a directional manner. By adjusting the size of the microstructure 21 and the tilt angle of the top wall 212, the reflectivity and transmittance of the screen can be precisely controlled to achieve the effect of anti-glare and enhanced reflection.

[0054] like Figure 4 As shown, in some embodiments, the substrate 10 has a second light-absorbing layer 11. The second light-absorbing layer 11 is located at least on the side of the substrate 10 closest to the optical structure 20. That is, the second light-absorbing layer 11 can be coated on the surface of the substrate 10, or the entire substrate 10 can be the second light-absorbing layer 11. For example, the substrate 10 is made of a light-absorbing material, or a light-absorbing material is doped into the substrate 10 so that the substrate 10 can form a light-absorbing layer. Thus, on the one hand, when stray light from the environment is incident on the substrate 10, it can be absorbed by the second light-absorbing layer 20. On the other hand, after the stray light from the environment passes through the sidewall 211 of the microstructure 21, a portion of it is reflected to the substrate 10 and can also be absorbed by the second light-absorbing layer 20, thereby achieving the absorption of stray light.

[0055] The material of the second light-absorbing layer 11 can be the same as or different from the material of the first light-absorbing layer.

[0056] like Figure 1As shown, in some specific examples, the projector 40 is located on one side of the projection screen 100 in the horizontal direction. For example, the projection screen 100 adopts a rectangular design with the length direction being horizontal. The projector 40 is arranged on one side of the projection screen 100 in the length direction, thereby realizing an ultra-short-throw side projection scheme. Each projection point of the projector 40 corresponds to multiple optical partitions 201. By designing the shape of each microstructure 21, the projection light can be reflected to the eye box area 60 through the reflective layer 22 of the top wall 212. At the same time, in the visible light band of 300–780nm in the environment, the reflectivity of this optical structure can be reduced to 0.19%, achieving a strong ability to suppress ambient stray light.

[0057] In some examples, the projection screen 100 also includes multiple sound-permeable holes 12. These holes 12 are located on the substrate 10 and penetrate the substrate 10 along its thickness. The sound-permeable holes 12 are situated between adjacent microstructures 21, falling within the gaps between them—that is, the exposed areas of the substrate 10—thus preserving the reflective and anti-light properties of the microstructures 21. The sound-permeable holes 12 can be circular or polygonal, such as regular polygonal holes. Furthermore, sound-permeable holes 12 can be provided between any two adjacent microstructures 21 to improve the uniformity of sound transmission.

[0058] Since each sound-permeable hole 12 is connected to the gap between the adjacent microstructure 21, the multiple sound-permeable holes 12 can be interconnected, balancing the sound pressure effect caused by the vibration of the speaker cone. By setting the sound-permeable holes 12, the sound transmission effect of the projection screen 100 is enhanced. The projection screen 100 can be arranged in the same direction as the speaker to achieve the sound emission effect of the projection screen 100.

[0059] like Figure 4 As shown, in some embodiments, the projection screen 100 further includes an outer layer structure 30, which is disposed on the side of the optical structure 20 away from the substrate 10. The outer layer structure 30 is a light-transmitting element and can serve as the optical window of the entire projection screen 100. Users view the screen from one side of the outer layer structure 30. By setting the outer layer structure 30, the optical structure 20 can be protected, allowing images to pass through while preventing the optical structure 20 from coming into contact with external dust, moisture, or oil, which could affect the reflection and anti-light function of the optical structure 20.

[0060] The outer layer structure 30 here can be PET film, high-transparency PC, PMMA or ultra-thin glass.

[0061] A cavity 301 is formed between the substrate 10 and the outer structure 30, and multiple sound-permeable holes 12 are connected to the cavity 301. By accurately calculating the area of ​​the sound-permeable holes 12 and the thickness of the outer structure 30, the influence of the projection screen on the sound quality of the speaker can be precisely adjusted.

[0062] In some embodiments, the outer layer 30 has a wear-resistant coating 31 on the side facing away from the optical structure 20. By providing the wear-resistant coating 31, an anti-scratch effect can be achieved, thereby improving the service life of the projection screen 100.

[0063] The imaging system 200 according to an embodiment of the present invention includes a projection screen 100 according to an embodiment of the present invention. By using the projection screen 100, the incident light of the projector 40 can be directionally enhanced, the influence of stray light in the environment on the projection can be reduced, the projection image quality and clarity can be improved, and the user experience can be enhanced.

[0064] like Figure 3 As shown, in some embodiments, the imaging system 200 further includes a projector 40, which is located on the side of the projection screen 100 near the center (the center corresponding to the optical partition 201) to form a side-projection ultra-short-throw projection. By designing the positional relationship between the projector 40 and the projection screen 100, the projection light from the projector 40 is directed toward the optical structure 20 of the projection screen 100 and reflected by the reflective surface 22 of the microstructure 21, ensuring that all projection light can be reflected and converged to the eye box area 60. The center is on the same side as the projector 40, which helps to separate the projection light and the ambient light at an angle, reduce the influence of ambient light on the projection, and improve the projection image quality and clarity.

[0065] like Figure 1 and Figure 3 As shown, in some embodiments, the imaging system 200 further includes a display screen 50, one side of which is the display side, and a projector 40 is located on the other side of the display screen 50. That is, the projector 40 can be hidden behind the display screen 50. As a result, stray light in the ambient light that is parallel to the incident light of the projector 40 can be partially blocked by the display screen 50, further reducing the influence of stray light.

[0066] Here, the display screen 50 can be the central control screen in the vehicle, and the projection screen 100 can be placed on the dashboard or on the passenger side screen, so that the picture can be displayed to the driver or passenger. Of course, the display screen 50 can also be a screen in other locations.

[0067] In some embodiments, the imaging system 200 further includes a speaker (not shown), which is located on one side of the projection screen 100 and on the side of the substrate 10 opposite to the optical structure 20, so that the projection screen 100 and the speaker can be arranged in the same direction to achieve the effect of the projection screen 100 emitting sound.

[0068] The bottom of the projection screen 100 may be provided with multiple sound-permeable holes 12, which enhances the sound transmission effect of the projection screen 100.

[0069] The following is combined Figures 1-7 A specific embodiment of the imaging system 200 according to the present invention is described.

[0070] The imaging system 200 includes a projection screen 100, a projector 40, a display screen 50, and speakers. The imaging system 200 can be installed inside a vehicle 300. The display screen 50 can be a screen in the center console of the vehicle 300. The projection screen 100 is installed on the dashboard in front of the driver's seat or on the passenger screen in front of the passenger seat. In the longitudinal direction, the projection screen 100 is located behind the display screen 50. The projector 40 is located behind the display screen 50, and the speakers are installed behind the projection screen 100.

[0071] The projection screen 100 includes a substrate 10, an optical structure 20 and an outer layer structure 30. The optical structure 20 is disposed between the substrate 10 and the outer layer structure 30 and is connected to the substrate 10. The substrate 10 has a second light-absorbing layer 11. The outer layer structure 30 is a PET film and is coated with a wear-resistant coating 31.

[0072] The optical structure 20 includes multiple optical partitions 201 arranged sequentially along the same center. Each optical partition 201 includes multiple microstructures 21 arranged along the extension direction of the optical partition 201 in which it is located. Each microstructure 21 has a side wall 211 and a top wall 212. One end of the side wall 211 is connected to the substrate 10. The side wall 211 of each microstructure 21 extends obliquely towards the center of the microstructure 21. The side wall 211 has a first light-absorbing layer 23. The top wall 212 is connected to the other end of the side wall 211. The top wall 212 is an inclined surface inclined to the surface of the substrate 10. The top wall 212 has a reflective layer 22. The reflective layer 22 of each microstructure 21 is used to project the image of the projector 40 onto the eye box area 60.

[0073] Under the action of the first light-absorbing layer 23 on the side wall 211 and the second light-absorbing layer 24 on the substrate 10, most of the ambient light incident on the side wall 211 can be absorbed by the first light-absorbing layer 23. Some of the unabsorbed ambient light can also penetrate the first light-absorbing layer 23 and be refracted in the microstructure 21. Another part of the unabsorbed ambient light is reflected to the substrate 10 and can be absorbed by the second light-absorbing layer 24. Thus, stray light in the environment can be absorbed by the light-absorbing layer, further reducing the probability of ambient light being reflected to the eye box area 60, further reducing the impact of ambient light on the projection, and improving the projection image quality and clarity.

[0074] The projection light emitted by the projector 40 behind the display screen 50 is diffusely reflected on the surface of the reflective layer 22, which enhances the light in a specific direction for the driver and co-driver's eye box area 60. Since the incident light direction is behind the display screen 50, stray ambient light parallel to the incident light direction can be physically blocked by the display screen 50, further reducing the impact of ambient light on the projection and improving the projection image quality and clarity.

[0075] The substrate 10 is also provided with sound-permeable holes 12. The sound-permeable holes 12 penetrate the substrate 10 along the thickness direction of the substrate 10. The sound-permeable holes 12 are located between multiple adjacent microstructures 21. The sound-permeable holes 12 are round holes. The sound-permeable holes 12 are evenly arranged on the substrate 10. The sound-permeable holes 12 are provided between any adjacent microstructures 21.

[0076] The size of the sound-permeable hole 12 can be designed according to the thickness of the outer layer structure 30. For example, the outer diameter of the sound-permeable hole 12 can be 0.8mm, and the outer layer structure 30 is a 0.3mm PET film material. As a result, the sound pressure level of the speaker at a distance of 1m and a reference frequency of 1kHz is about 2db, which is relatively small and can ensure the sound transmission effect of the projection screen 100.

[0077] Therefore, according to the embodiment of the present invention, the imaging system 200 enhances the reflection effect of incident light emitted by the projector 40 through the design of the optical structure 20, while reducing the influence of ambient light on the projected image; the side projection scheme and the positional arrangement of the projector 40 and the display screen 50 reduce the influence of ambient incident light; and the sound transmission hole design enhances the sound transmission rate and sound transmission, balances the sound pressure distribution, and achieves sound transmission of the projection screen 100.

[0078] like Figure 8 As shown, the vehicle 300 according to an embodiment of the present invention includes a projection screen 100 according to an embodiment of the present invention or an imaging system 200 according to an embodiment of the present invention. By using the projection screen 100, the incident light of the projector 40 can be directionally enhanced, the influence of stray light in the environment on the projection can be reduced, the projection image quality and clarity can be improved, and the user experience can be enhanced.

[0079] Other configurations and operations of the vehicle 300 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The vertical, horizontal, and front-back directions are defined as shown in the figures.

[0080] In the description of this invention, 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 not in direct contact but 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.

[0081] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0082] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A projection screen, characterized in that, include: Substrate (10); An optical structure (20) is disposed on the substrate (10) and includes multiple sets of optical partitions (201). The multiple sets of optical partitions (201) are arranged sequentially along the same center. Each optical partition (201) includes multiple microstructures (21). The multiple microstructures (21) are arranged along the extension direction of the optical partition (201) in which they are located. Each of the microstructures (21) has a side wall (211) and a top wall (212). One end of the side wall (211) is connected to the substrate (10), and the top wall (212) is connected to the other end of the side wall (211) and has a reflective layer (22). The reflective layer (22) of each microstructure (21) is used to project the image of the projector (40) onto the eye box area (60). Along the direction away from the substrate (10), the side wall (211) of each microstructure (21) extends obliquely toward the center of the microstructure (21).

2. The projection screen according to claim 1, characterized in that, Each of the microstructures (21) has a first light-absorbing layer (23) on its sidewall (211).

3. The projection screen according to claim 2, characterized in that, The sidewalls (211) of each of the microstructures (21) unfold into a wavy fan ring.

4. The projection screen according to claim 1, characterized in that, The reflective layer (22) is an anti-reflective coating.

5. The projection screen according to claim 1, characterized in that, The top wall (212) is an inclined surface that is inclined to the surface of the substrate (10). Along the direction away from the center, the top wall (212) extends inclined from the direction close to the substrate (10) toward the direction away from the substrate (10).

6. The projection screen according to claim 1, characterized in that, The substrate (10) has a second light-absorbing layer (11), which is located at least on the side of the substrate (10) near the optical structure (20).

7. The projection screen according to claim 1, characterized in that, Also includes: Multiple sound-permeable holes (12) are provided on the substrate (10) and penetrate the substrate (10) along the thickness direction of the substrate (10), wherein the sound-permeable holes (12) are located between adjacent multiple microstructures (21).

8. The projection screen according to claim 1, characterized in that, It also includes an outer layer structure (30), which is disposed on the side of the optical structure (20) away from the substrate (10), and the outer layer structure (30) is a light-transmitting element.

9. The projection screen according to claim 8, characterized in that, The outer layer (30) has a wear-resistant coating (31) on the side opposite to the optical structure (20).

10. An imaging system, characterized in that, Includes a projection screen according to any one of claims 1-9.

11. The imaging system according to claim 10, characterized in that, It also includes a projector (40) located on the side of the projection screen closer to the center.

12. The imaging system according to claim 11, characterized in that, It also includes: a display screen (50), one side of which is the display side, and the projector (40) is located on the other side of the display screen (50).

13. The imaging system according to claim 10, characterized in that, Also includes: A speaker is located on one side of the projection screen and on the side of the substrate (10) opposite to the optical structure (20).

14. A vehicle, characterized in that, Includes a projection screen according to any one of claims 1-9 or an imaging system according to any one of claims 10-13.

Images