WO2021174988A1 - Transparent rear projection screen and projection system - Google Patents

Transparent rear projection screen and projection system Download PDF

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Publication number
WO2021174988A1
WO2021174988A1 PCT/CN2020/142126 CN2020142126W WO2021174988A1 WO 2021174988 A1 WO2021174988 A1 WO 2021174988A1 CN 2020142126 W CN2020142126 W CN 2020142126W WO 2021174988 A1 WO2021174988 A1 WO 2021174988A1
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WIPO (PCT)
Prior art keywords
projection screen
transparent rear
transparent
rear projection
incident light
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PCT/CN2020/142126
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French (fr)
Chinese (zh)
Inventor
李士杰
胡飞
王霖
李屹
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Shenzhen Appotronics Corp Ltd
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Appotronics Corp Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds

Definitions

  • the utility model relates to the technical field of projection display, in particular to a transparent rear projection screen and a projection system.
  • Transparent display means that the screen is transparent when the content is not played.
  • the purpose of the utility model is to provide a transparent rear projection screen and a projection system capable of transparent display.
  • the present invention provides a transparent rear projection screen and a projection system.
  • the transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of mutually embedded in the light-transmitting layer. Diffusion layers arranged at intervals; the light-transmitting layer includes a projection surface and a viewing surface opposite to the projection surface, and the diffusion layer is tilted from top to bottom from the projection surface to the viewing surface; The projection surface is incident on the diffusion layer, and after being scattered by the diffusion layer to change the exit angle of the incident light, it is emitted from the viewing surface.
  • the diffusion layer includes a diffusion layer base surface embedded obliquely inside the light-transmitting layer and a plurality of scattering microstructures protruding and extending from the diffusion layer base surface in the direction of the projection surface; the incident light is formed by The projection surface is incident on the diffusion layer and is scattered by the scattering microstructure to change the exit angle of the incident light, and then exits from the viewing surface.
  • the scattering microstructure is a prism microstructure.
  • the cross section of the diffusion layer is zigzag.
  • the interval between two adjacent diffusion layers is the same.
  • the diffusion layer is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.
  • the light-transmitting layer is made of a transparent organic material.
  • the utility model also provides a projection system.
  • the projection system includes the transparent rear projection screen as described in any one of the above and a projector for generating incident light.
  • the projector is arranged close to the transparent rear projection screen. One side of the projection surface.
  • the projector and the transparent rear projection screen are arranged directly opposite, and the incident light enters the transparent rear projection screen in a direction perpendicular to the transparent rear projection screen.
  • the projector and the transparent rear projection screen are arranged in a staggered manner, so that the incident light crosses the transparent rear projection screen, and the incident light enters the transparent rear projection in a direction inclined from bottom to top Screen.
  • a transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of diffusion layers that are embedded in the light-transmitting layer and arranged at intervals; the light-transmitting layer includes a projection surface and A viewing surface arranged opposite to the projection surface, the diffusion layer is inclined from top to bottom from the projection surface to the viewing surface;
  • the line of sight of a person forms an elevation angle ⁇ with the horizontal plane; by setting the inclination angle of the diffusion layer and the distance between two adjacent diffusion layers, when the elevation angle ⁇ ranges from 20° to 60°
  • the transparent rear projection screen that people see is transparent.
  • the incident light enters the diffusion layer from the projection surface, and is scattered by the diffusion layer to change the exit angle of the incident light, and then exits from the viewing surface. To see the projection screen.
  • Figure 1 is a schematic diagram of the scattering and propagation of incident light after irradiating a transparent rear projection screen of the utility model
  • Figure 2 is a schematic diagram of the structure of the transparent rear projection screen of the present invention.
  • Figure 3 is a partial enlarged schematic diagram of the diffusion layer of the present invention.
  • Figure 4 is a schematic diagram of the utility model transparent rear projection screen and projection system application
  • Figure 5 shows another way of placing the projector of the utility model
  • Figure 6 is a schematic diagram of the manufacturing method of the diffusion layer of the present invention.
  • the present invention provides a transparent rear projection screen 10, including a transparent layer 1 made of transparent material and embedded in the transparent layer 1 are arranged at intervals. Diffusion layer 2; the light-transmitting layer 1 includes a projection surface 11 and a viewing surface 12 opposite to the projection surface 11, and the diffusion layer 2 is from the projection surface 11 to the viewing surface 12 from top to bottom Inclined arrangement; incident light 3 enters the diffusion layer 2 from the projection surface 11, and is scattered by the diffusion layer 2 to change the exit angle of the incident light 3, and then exits the viewing surface 12.
  • the transparent rear projection screen 10 is placed on the top of the building.
  • the person looks at the transparent rear projection screen 10 on the ground, the person’s line of sight and the horizontal plane form an elevation angle ⁇ ;
  • the incident light 3 enters the diffusion layer 2 from the projection surface 11, and is scattered by the diffusion layer 2 to change the exit angle of the incident light 3, and then exits the viewing surface 12 , People can clearly see the projection screen.
  • the light-transmitting layer 1 is made of a transparent organic material.
  • the diffusion layer 2 includes a diffusion layer base surface 21 that is obliquely embedded in the light-transmitting layer 1 and a plurality of scattering microstructures protruding and extending from the diffusion layer base surface 21 toward the projection surface 11 22;
  • the incident light 3 is incident on the diffusion layer 2 from the projection surface 11, and after being scattered by the scattering microstructure 22 to change the exit angle of the incident light 3, it is emitted from the viewing surface 12.
  • the configuration of this structure can effectively control the diffusion angle and propagation direction of the incident light 3.
  • the cross-section of the diffusion layer 2 is in a zigzag shape.
  • the scattering microstructure 22 is a prism microstructure.
  • the diffusion layer 2 is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.
  • the method of embedding the diffusion layer 2 into the transparent layer 1 is as follows: firstly, an inclined structure is made on a transparent organic material, and then the diffusion layer 2 is coated on the inclined surface, and then Gluing and filling the inclined structure, the diffusion layer 2 is embedded in the transparent layer 1 obliquely.
  • an inclined structure is made on a transparent organic material
  • the diffusion layer 2 is coated on the inclined surface
  • Gluing and filling the inclined structure the diffusion layer 2 is embedded in the transparent layer 1 obliquely.
  • the present invention also provides a projection system 100.
  • the projection system 100 includes a transparent rear projection screen 10 as described above and a projector 20 for generating incident light 3, and the projector 20 is arranged on the transparent back.
  • the projection screen 10 is close to the side of the projection surface 11.
  • the projector 20 can be placed according to actual conditions, and the projector 20 can be arranged directly opposite to the transparent rear projection screen 10. At this time, the incident light 3 is perpendicular to the transparent rear projection screen. The direction of the rear projection screen 10 is incident on the transparent rear projection screen 10.
  • the projector 20 can also be placed in a staggered arrangement with the transparent rear projection screen 10, so that the incident light 3 crosses the transparent rear projection screen 10. At this time, the incident light 3 is inclined from bottom to top. The direction incident on the transparent rear projection screen 10.
  • the incident light 3 due to the angular distribution of the incident light 3 emitted by the projector 20, the incident light 3 has different positions on the transparent rear projection screen 10, and the incident angles of the incident light 3 on the transparent rear projection screen 10 are different. , It will have an impact on the uniformity of brightness, and a software can be added to the projector 20 to normalize the projection light 3.
  • the interval between two adjacent diffusion layers is the same.
  • the distance between two adjacent diffusion layers can also be adjusted according to actual requirements.
  • the projector 20 and the transparent rear-projection screen 10 are arranged in a misaligned manner so that the incident light 3 crosses the transparent rear-projection screen 10, the incident light 3 is incident on the surface in a direction inclined from bottom to top. ⁇ Transparent rear projection screen 10.
  • the incident light 3 emitted by the projector 20 is projected onto the transparent rear-projection screen 10 through a certain incident angle.
  • the distance between two adjacent diffusion layers 2 can be increased, thereby The transparency of the transparent rear projection screen 10 is improved, and the display effect is better.
  • a transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of diffusion layers that are embedded in the light-transmitting layer and arranged at intervals; the light-transmitting layer includes a projection surface and A viewing surface arranged opposite to the projection surface, the diffusion layer is inclined from top to bottom from the projection surface to the viewing surface;
  • the line of sight of a person forms an elevation angle ⁇ with the horizontal plane; by setting the inclination angle of the diffusion layer and the distance between two adjacent diffusion layers, when the elevation angle ⁇ ranges from 20° to 60°
  • the transparent rear projection screen that people see is transparent.
  • the incident light enters the diffusion layer from the projection surface, and is scattered by the diffusion layer to change the exit angle of the incident light, and then exits from the viewing surface. To see the projection screen.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Marketing (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Overhead Projectors And Projection Screens (AREA)

Abstract

A transparent rear projection screen (10) and a projection system (100). The transparent rear projection screen (10) comprises an optically transmissive layer (1) made of a transparent material and multiple diffusion layers (2) provided in the optically transmissive layer (1) and spaced apart from one another. The optically transmissive layer (1) comprises a projection surface (11) and a viewing surface (12) arranged opposite to the projection surface (11). The diffusion layers (2) are configured inclined downwardly from the projection surface (11) to the viewing surface (12). Incident light (3) enters the diffusion layers (2) via the projection surface (11). An angle at which the incident light (3) is to exit is changed after the incident light has been scattered by the diffusion layers (3), and then the incident light exits via the viewing surface (12). Compared with the prior art, when no incident light (3) enters the transparent rear projection screen (10) and the projection system (100), the transparent rear projection screen (10) is transparent to a viewer.

Description

透明背投屏幕及投影系统Transparent rear projection screen and projection system 技术领域Technical field

本实用新型涉及投影显示技术领域，尤其涉及一种透明背投屏幕及投影系统。The utility model relates to the technical field of projection display, in particular to a transparent rear projection screen and a projection system.

背景技术Background technique

随着城市的不断扩张，城市里写字楼林立，在行人面前，一座座高楼耸立，形成了天然打广告、景观秀以及其他展示的载体。海报是常用的展示手段，晚上需要额外的照明光源。LED户外屏是另一种常见的展示手段，自发光，无需照明可以昼夜观看。With the continuous expansion of the city, there are many office buildings in the city. In front of pedestrians, tall buildings stand tall, forming a natural vehicle for advertising, landscape shows, and other displays. Posters are a common display method, and additional lighting sources are needed at night. LED outdoor screen is another common display method, which is self-luminous and can be viewed day and night without lighting.

然而，上述方案想做透明显示较难，透明显示是指，不播放内容是屏幕透明。However, it is difficult for the above solutions to make transparent display. Transparent display means that the screen is transparent when the content is not played.

因此有必要提供一种新的透明背投屏幕及投影系统解决上述问题。Therefore, it is necessary to provide a new transparent rear projection screen and projection system to solve the above-mentioned problems.

实用新型内容Utility model content

本实用新型的目的在于提供一种能够透明显示的透明背投屏幕及投影系统。The purpose of the utility model is to provide a transparent rear projection screen and a projection system capable of transparent display.

为达到上述目的，本实用新型提供了一种透明背投屏幕及投影系统，所述透明背投屏幕包括由透明材料制成的透光层和嵌入在所述透光层内部的多个呈相互间隔设置的扩散层；所述透光层包括投影面和与所述投影面相对设置的观看面，所述扩散层由所述投影面向所述观看面呈自上向下倾斜设置；入射光由所述投影面入射到所述扩散层，并经所述扩散层散射以改变所述入射光的出射角度后，由所述观看面射出。In order to achieve the above objective, the present invention provides a transparent rear projection screen and a projection system. The transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of mutually embedded in the light-transmitting layer. Diffusion layers arranged at intervals; the light-transmitting layer includes a projection surface and a viewing surface opposite to the projection surface, and the diffusion layer is tilted from top to bottom from the projection surface to the viewing surface; The projection surface is incident on the diffusion layer, and after being scattered by the diffusion layer to change the exit angle of the incident light, it is emitted from the viewing surface.

优选的，所述扩散层包括倾斜嵌入在所述透光层内部的扩散层基面和由所述扩散层基面向所述投影面方向凸出延伸的多个散射微结 构；所述入射光由所述投影面入射到所述扩散层，并经所述散射微结构散射以改变所述入射光的出射角度后，由所述观看面射出。Preferably, the diffusion layer includes a diffusion layer base surface embedded obliquely inside the light-transmitting layer and a plurality of scattering microstructures protruding and extending from the diffusion layer base surface in the direction of the projection surface; the incident light is formed by The projection surface is incident on the diffusion layer and is scattered by the scattering microstructure to change the exit angle of the incident light, and then exits from the viewing surface.

优选的，所述散射微结构为棱镜微结构。Preferably, the scattering microstructure is a prism microstructure.

优选的，所述扩散层的横截面呈锯齿形。Preferably, the cross section of the diffusion layer is zigzag.

优选的，所述多个扩散层中，相邻的两个扩散层之间的间隔相同。Preferably, in the plurality of diffusion layers, the interval between two adjacent diffusion layers is the same.

优选的，所述扩散层由聚碳酸酯、聚对苯二甲酸乙二酯、聚氯乙烯、聚氨酯以及甲基丙烯酸甲酯中的任意一种制成。Preferably, the diffusion layer is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.

优选的，所述透光层为透明有机材料制成。Preferably, the light-transmitting layer is made of a transparent organic material.

本实用新型还提供了一种投影系统，所述投影系统包括如上任意一项所述的透明背投屏幕和用以产生入射光的投影机，所述投影机设置在所述透明背投屏幕靠近所述投影面的一侧。The utility model also provides a projection system. The projection system includes the transparent rear projection screen as described in any one of the above and a projector for generating incident light. The projector is arranged close to the transparent rear projection screen. One side of the projection surface.

优选的，所述投影机与所述透明背投屏幕正对设置，且所述入射光沿垂直于所述透明背投屏幕的方向入射至所述透明背投屏幕。Preferably, the projector and the transparent rear projection screen are arranged directly opposite, and the incident light enters the transparent rear projection screen in a direction perpendicular to the transparent rear projection screen.

优选的，所述投影机与所述透明背投屏幕错位设置，使得所述入射光与所述透明背投屏幕交叉，且所述入射光沿由下向上倾斜的方向入射至所述透明背投屏幕。Preferably, the projector and the transparent rear projection screen are arranged in a staggered manner, so that the incident light crosses the transparent rear projection screen, and the incident light enters the transparent rear projection in a direction inclined from bottom to top Screen.

相较于现有技术，透明背投屏幕包括由透明材料制成的透光层和嵌入在所述透光层内部的多个呈相互间隔设置的扩散层；所述透光层包括投影面和与所述投影面相对设置的观看面，所述扩散层由所述投影面向所述观看面呈自上向下倾斜设置；透明背投屏幕放置在楼顶，人在地面上看所述透明背投屏幕时，人的视线与水平面形成一个仰视角α；通过设置所述扩散层的倾斜角度和相邻两个的所述扩散层的间距，当所述仰视角α范围在20°～60°之间且无入射光时，人看到的透明背投屏幕为透明的。有入射光时，所述入射光由所述投影面入射到所述扩散层，并经所述扩散层散射以改变所述入射光的出射角度后，由所述观看面射出，人则可以清晰的看到投影画面。Compared with the prior art, a transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of diffusion layers that are embedded in the light-transmitting layer and arranged at intervals; the light-transmitting layer includes a projection surface and A viewing surface arranged opposite to the projection surface, the diffusion layer is inclined from top to bottom from the projection surface to the viewing surface; When projecting the screen, the line of sight of a person forms an elevation angle α with the horizontal plane; by setting the inclination angle of the diffusion layer and the distance between two adjacent diffusion layers, when the elevation angle α ranges from 20° to 60° When there is no incident light, the transparent rear projection screen that people see is transparent. When there is incident light, the incident light enters the diffusion layer from the projection surface, and is scattered by the diffusion layer to change the exit angle of the incident light, and then exits from the viewing surface. To see the projection screen.

附图说明Description of the drawings

为了使本实用新型的内容更加清晰，下面将对实施例描述中所需 要使用的附图作简单的介绍，显而易见地，下面描述中的附图仅仅是本实用新型的一些实施例，对本领域的普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他附图，其中：In order to make the content of the present utility model clearer, the following will briefly introduce the drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model, which are useful to those in the field. Ordinary technicians can obtain other drawings based on these drawings without creative work, among which:

图1为本实用新型入射光照射透明背投屏幕后散射传播示意图；Figure 1 is a schematic diagram of the scattering and propagation of incident light after irradiating a transparent rear projection screen of the utility model;

图2为本实用新型透明背投屏幕的结构示意图；Figure 2 is a schematic diagram of the structure of the transparent rear projection screen of the present invention;

图3为本实用新型扩散层的局部放大示意图；Figure 3 is a partial enlarged schematic diagram of the diffusion layer of the present invention;

图4为本实用新型透明背投屏幕及投影系统应用示意图；Figure 4 is a schematic diagram of the utility model transparent rear projection screen and projection system application;

图5为本实用新型投影机的另一种摆放方式；Figure 5 shows another way of placing the projector of the utility model;

图6为本实用新型扩散层的制作方法示意图。Figure 6 is a schematic diagram of the manufacturing method of the diffusion layer of the present invention.

具体实施方式Detailed ways

下面将结合本实用新型实施例中的附图，对本实用新型实施例中实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本实用新型的一部分实施例，而不是全部的实施例。基于本实用新型中的所有其它实施例，都属于本实用新型保护的范围。In the following, in conjunction with the drawings in the embodiments of the present utility model, the technical solutions obtained by those of ordinary skill in the art without creative work will be clearly and completely described in the embodiments of the present utility model. Obviously, The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments based on the utility model belong to the protection scope of the utility model.

请参照图1-6所示，本实用新型提供一种透明背投屏幕10，包括由透明材料制成的透光层1和嵌入在所述透光层1内部的多个呈相互间隔设置的扩散层2；所述透光层1包括投影面11和与所述投影面11相对设置的观看面12，所述扩散层2由所述投影面11向所述观看面12呈自上向下倾斜设置；入射光3由所述投影面11入射到所述扩散层2，并经所述扩散层2散射以改变所述入射光3的出射角度后，由所述观看面12射出。Please refer to Figures 1-6, the present invention provides a transparent rear projection screen 10, including a transparent layer 1 made of transparent material and embedded in the transparent layer 1 are arranged at intervals. Diffusion layer 2; the light-transmitting layer 1 includes a projection surface 11 and a viewing surface 12 opposite to the projection surface 11, and the diffusion layer 2 is from the projection surface 11 to the viewing surface 12 from top to bottom Inclined arrangement; incident light 3 enters the diffusion layer 2 from the projection surface 11, and is scattered by the diffusion layer 2 to change the exit angle of the incident light 3, and then exits the viewing surface 12.

在本实施方式中，透明背投屏幕10放置在楼顶，人在地面上看所述透明背投屏幕10时，人的视线与水平面形成一个仰视角α；通过设置所述扩散层2的倾斜角度和相邻两个所述扩散层2之间的间距，当所述仰视角α范围在20°～60°之间且无入射光时，人看到的所述透明背投屏幕10为透明的。有投影时，所述入射光3由所述投影面11入射到所述扩散层2，并经所述扩散层2散射以改变所述入 射光3的出射角度后，由所述观看面12射出，人则可以清晰的看到投影画面。In this embodiment, the transparent rear projection screen 10 is placed on the top of the building. When a person looks at the transparent rear projection screen 10 on the ground, the person’s line of sight and the horizontal plane form an elevation angle α; The angle and the distance between two adjacent diffusion layers 2, when the elevation angle α ranges from 20° to 60° and there is no incident light, the transparent rear projection screen 10 seen by people is transparent of. When there is projection, the incident light 3 enters the diffusion layer 2 from the projection surface 11, and is scattered by the diffusion layer 2 to change the exit angle of the incident light 3, and then exits the viewing surface 12 , People can clearly see the projection screen.

为了使所述透明背投屏幕10的显示效果更优，在本实施方式中，所述透光层1为透明有机材料制成。In order to make the display effect of the transparent rear projection screen 10 better, in this embodiment, the light-transmitting layer 1 is made of a transparent organic material.

具体的，所述扩散层2包括倾斜嵌入在所述透光层1内部的扩散层基面21和由所述扩散层基面21向所述投影面11方向凸出延伸的多个散射微结构22；所述入射光3由所述投影面11入射到所述扩散层2，并经所述散射微结构22散射以改变所述入射光3的出射角度后，由所述观看面12射出。该结构的设置可以有效的控制所述入射光3的扩散角度和传播方向。Specifically, the diffusion layer 2 includes a diffusion layer base surface 21 that is obliquely embedded in the light-transmitting layer 1 and a plurality of scattering microstructures protruding and extending from the diffusion layer base surface 21 toward the projection surface 11 22; The incident light 3 is incident on the diffusion layer 2 from the projection surface 11, and after being scattered by the scattering microstructure 22 to change the exit angle of the incident light 3, it is emitted from the viewing surface 12. The configuration of this structure can effectively control the diffusion angle and propagation direction of the incident light 3.

在本实施方式中，所述扩散层2的横截面呈锯齿形。In this embodiment, the cross-section of the diffusion layer 2 is in a zigzag shape.

更优的，为了使所述扩散层2的散射效率更高，在本实施方式中，所述散射微结构22为棱镜微结构。More preferably, in order to make the scattering efficiency of the diffusion layer 2 higher, in this embodiment, the scattering microstructure 22 is a prism microstructure.

在本实施方式中，所述扩散层2由聚碳酸酯、聚对苯二甲酸乙二酯、聚氯乙烯、聚氨酯以及甲基丙烯酸甲酯中的任意一种制成。In this embodiment, the diffusion layer 2 is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.

进一步的，在本实施方式中，所述扩散层2嵌入所述透明层1内部的制作方式为：首先在透明有机材料上制作倾斜结构，再在倾斜面上涂覆所述扩散层2，之后胶合以及填充倾斜结构，所述扩散层2则倾斜嵌入在所述透明层1的内部。当然，不限于此种制作方式。Further, in this embodiment, the method of embedding the diffusion layer 2 into the transparent layer 1 is as follows: firstly, an inclined structure is made on a transparent organic material, and then the diffusion layer 2 is coated on the inclined surface, and then Gluing and filling the inclined structure, the diffusion layer 2 is embedded in the transparent layer 1 obliquely. Of course, it is not limited to this production method.

本实用新型还提供了一种投影系统100，所述投影系统100包括如上所述的透明背投屏幕10和用以产生入射光3的投影机20，所述投影机20设置在所述透明背投屏幕10靠近所述投影面11的一侧。The present invention also provides a projection system 100. The projection system 100 includes a transparent rear projection screen 10 as described above and a projector 20 for generating incident light 3, and the projector 20 is arranged on the transparent back. The projection screen 10 is close to the side of the projection surface 11.

值得一提的是，所述投影机20可以根据实际情况摆放，所述投影机20可以与所述透明背投屏幕10正对设置，此时，所述入射光3沿垂直于所述透明背投屏幕10的方向入射至所述透明背投屏幕10。当然，所述投影机20也可以与所述透明背投屏幕10错位设置，使得所述入射光3与所述透明背投屏幕10交叉，此时，所述入射光3沿由下向上倾斜的方向入射至所述透明背投屏幕10。另外，由于所述投影机20发出的所述入射光3存在角分布，使所述入射光3在透明 背投屏幕10上的不同位置，且入射在所述透明背投屏幕10的入射角度不同，会对亮度的均匀性有影响，可以在所述投影机20增加一个软件对所述投影光3进行归一化调整。It is worth mentioning that the projector 20 can be placed according to actual conditions, and the projector 20 can be arranged directly opposite to the transparent rear projection screen 10. At this time, the incident light 3 is perpendicular to the transparent rear projection screen. The direction of the rear projection screen 10 is incident on the transparent rear projection screen 10. Of course, the projector 20 can also be placed in a staggered arrangement with the transparent rear projection screen 10, so that the incident light 3 crosses the transparent rear projection screen 10. At this time, the incident light 3 is inclined from bottom to top. The direction incident on the transparent rear projection screen 10. In addition, due to the angular distribution of the incident light 3 emitted by the projector 20, the incident light 3 has different positions on the transparent rear projection screen 10, and the incident angles of the incident light 3 on the transparent rear projection screen 10 are different. , It will have an impact on the uniformity of brightness, and a software can be added to the projector 20 to normalize the projection light 3.

在本实施方式中，所述多个扩散层2中，相邻的两个扩散层之间的间隔相同。当然，也可以根据实际需求调整相邻两个所述扩散层之间的间距。比如，当所述投影机20与所述透明背投屏幕10错位设置，使得所述入射光3与所述透明背投屏幕10交叉，所述入射光3沿由下向上倾斜的方向入射至所述透明背投屏幕10。此时，所述投影机20发出的入射光3通过一定的入射角度投影到所述透明背投屏幕10上，这时则可以通过增加相邻两个所述扩散层2之间的间距，从而提高了所述透明背投屏幕10的透明度，显示效果更优。In this embodiment, in the plurality of diffusion layers 2, the interval between two adjacent diffusion layers is the same. Of course, the distance between two adjacent diffusion layers can also be adjusted according to actual requirements. For example, when the projector 20 and the transparent rear-projection screen 10 are arranged in a misaligned manner so that the incident light 3 crosses the transparent rear-projection screen 10, the incident light 3 is incident on the surface in a direction inclined from bottom to top.述Transparent rear projection screen 10. At this time, the incident light 3 emitted by the projector 20 is projected onto the transparent rear-projection screen 10 through a certain incident angle. At this time, the distance between two adjacent diffusion layers 2 can be increased, thereby The transparency of the transparent rear projection screen 10 is improved, and the display effect is better.

相较于现有技术，透明背投屏幕包括由透明材料制成的透光层和嵌入在所述透光层内部的多个呈相互间隔设置的扩散层；所述透光层包括投影面和与所述投影面相对设置的观看面，所述扩散层由所述投影面向所述观看面呈自上向下倾斜设置；透明背投屏幕放置在楼顶，人在地面上看所述透明背投屏幕时，人的视线与水平面形成一个仰视角α；通过设置所述扩散层的倾斜角度和相邻两个的所述扩散层的间距，当所述仰视角α范围在20°～60°之间且无入射光时，人看到的透明背投屏幕为透明的。有入射光时，所述入射光由所述投影面入射到所述扩散层，并经所述扩散层散射以改变所述入射光的出射角度后，由所述观看面射出，人则可以清晰的看到投影画面。Compared with the prior art, a transparent rear projection screen includes a light-transmitting layer made of a transparent material and a plurality of diffusion layers that are embedded in the light-transmitting layer and arranged at intervals; the light-transmitting layer includes a projection surface and A viewing surface arranged opposite to the projection surface, the diffusion layer is inclined from top to bottom from the projection surface to the viewing surface; When projecting the screen, the line of sight of a person forms an elevation angle α with the horizontal plane; by setting the inclination angle of the diffusion layer and the distance between two adjacent diffusion layers, when the elevation angle α ranges from 20° to 60° When there is no incident light, the transparent rear projection screen that people see is transparent. When there is incident light, the incident light enters the diffusion layer from the projection surface, and is scattered by the diffusion layer to change the exit angle of the incident light, and then exits from the viewing surface. To see the projection screen.

以上实施例仅为清楚说明本实用新型所作的举例，并非对实施方式的限定；本实用新型的范围包括并不限于上述实施例，凡是按照本实用新型的形状、结构所作的等效变化均包含在本实用新型的保护范围内。The above embodiments are only examples to clearly illustrate the utility model, and are not intended to limit the implementation; the scope of the utility model includes but is not limited to the above embodiments, and all equivalent changes made in accordance with the shape and structure of the utility model include Within the protection scope of the utility model.

Claims (10)

一种透明背投屏幕，其特征在于，所述透明背投屏幕包括由透明材料制成的透光层和嵌入在所述透光层内部的多个相互间隔设置的扩散层；所述透光层包括投影面和与所述投影面相对设置的观看面，所述扩散层由所述投影面向所述观看面呈自上向下倾斜设置；入射光由所述投影面入射到所述扩散层，并经所述扩散层散射以改变所述入射光的出射角度后，由所述观看面射出。A transparent rear projection screen, characterized in that, the transparent rear projection screen comprises a light-transmitting layer made of a transparent material and a plurality of diffusion layers arranged at intervals and embedded in the light-transmitting layer; the light-transmitting layer The layer includes a projection surface and a viewing surface arranged opposite to the projection surface. The diffusion layer is arranged obliquely from top to bottom from the projection surface to the viewing surface; incident light enters the diffusion layer from the projection surface , And after being scattered by the diffusion layer to change the exit angle of the incident light, it is emitted from the viewing surface. 根据权利要求1所述的透明背投屏幕，其特征在于，所述扩散层包括倾斜嵌入在所述透光层内部的扩散层基面和由所述扩散层基面向所述投影面方向凸出延伸的多个散射微结构；所述入射光由所述投影面入射到所述扩散层，并经所述散射微结构散射以改变所述入射光的出射角度后，由所述观看面射出。The transparent rear projection screen according to claim 1, wherein the diffusion layer includes a diffusion layer base surface that is obliquely embedded in the light-transmitting layer and protrudes from the diffusion layer base toward the projection surface. A plurality of extended scattering microstructures; the incident light enters the diffusion layer from the projection surface, and is scattered by the scattering microstructures to change the exit angle of the incident light, and then exits from the viewing surface. 根据权利要求2所述的透明背投屏幕，其特征在于，所述散射微结构为棱镜微结构。The transparent rear projection screen of claim 2, wherein the scattering microstructure is a prism microstructure. 根据权利要求2所述的透明背投屏幕，其特征在于，所述扩散层的横截面呈锯齿形。3. The transparent rear projection screen according to claim 2, wherein the cross section of the diffusion layer is zigzag. 根据权利要求1所述的透明背投屏幕，其特征在于，所述多个扩散层中，相邻的两个扩散层之间的间隔相同。The transparent rear projection screen according to claim 1, wherein, in the plurality of diffusion layers, the interval between two adjacent diffusion layers is the same. 根据权利要求5所述的透明背投屏幕，其特征在于，所述扩散层由聚碳酸酯、聚对苯二甲酸乙二酯、聚氯乙烯、聚氨酯以及甲基丙烯酸甲酯中的任意一种制成。The transparent rear projection screen of claim 5, wherein the diffusion layer is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate production. 根据权利要求1所述的透明背投屏幕，其特征在于，所述透光层为透明有机材料制成。The transparent rear projection screen of claim 1, wherein the light-transmitting layer is made of a transparent organic material. 一种投影系统，其特征在于，所述投影系统包括如权利要求1-7任意一项所述的透明背投屏幕和用以产生入射光的投影机，所述投影机设置在所述透明背投屏幕靠近所述投影面的一侧。A projection system, characterized in that the projection system comprises the transparent rear projection screen according to any one of claims 1-7 and a projector for generating incident light, the projector being arranged on the transparent back The projection screen is close to the side of the projection surface. 根据权利要求8所述的透明背投屏幕，其特征在于，所述投影机与所述透明背投屏幕正对设置，且所述入射光沿垂直于所述透明背投 屏幕的方向入射至所述透明背投屏幕。The transparent rear projection screen according to claim 8, wherein the projector and the transparent rear projection screen are arranged directly opposite, and the incident light enters the transparent rear projection screen in a direction perpendicular to the transparent rear projection screen. The transparent rear projection screen. 根据权利要求8所述的透明背投屏幕，其特征在于，所述投影机与所述透明背投屏幕错位设置，使得所述入射光与所述透明背投屏幕交叉，且所述入射光沿由下向上倾斜的方向入射至所述透明背投屏幕。The transparent rear-projection screen according to claim 8, wherein the projector and the transparent rear-projection screen are arranged in a staggered manner, so that the incident light crosses the transparent rear-projection screen, and the incident light is along It is incident on the transparent rear projection screen in a direction inclined from bottom to top.
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