CN211718685U - Transparent rear projection screen and projection system - Google Patents
Transparent rear projection screen and projection system Download PDFInfo
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- CN211718685U CN211718685U CN202020255351.8U CN202020255351U CN211718685U CN 211718685 U CN211718685 U CN 211718685U CN 202020255351 U CN202020255351 U CN 202020255351U CN 211718685 U CN211718685 U CN 211718685U
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- projection screen
- transparent rear
- projection
- transparent
- incident light
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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
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- 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
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- 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
The utility model provides a transparent rear projection screen and a projection system, wherein the transparent rear projection screen comprises a euphotic layer made of transparent materials and a plurality of diffusion layers which are embedded in the euphotic layer and are arranged at intervals; the euphotic layer comprises a projection surface and a viewing surface arranged opposite to the projection surface, and the diffusion layer is obliquely arranged from top to bottom from the projection surface to the viewing surface; incident light is incident to the diffusion layer from the projection surface, and is emitted from the viewing surface after being scattered by the diffusion layer to change the emergent angle of the incident light. Compared with the prior art, the transparent rear projection screen and the projection system of the utility model have the advantages that when no incident light exists, the transparent rear projection screen is transparent.
Description
Technical Field
The utility model relates to a projection display technology field especially relates to a transparent rear-projection screen and projection system.
Background
Along with the continuous expansion of cities, office buildings stand in the cities, and high buildings stand in front of pedestrians, so that natural advertising, landscape shows and other display carriers are formed. Posters are a common display means requiring additional illumination sources at night. The LED outdoor screen is another common display means, is self-luminous, and can be watched day and night without illumination.
However, it is difficult to perform transparent display in the above scheme, and transparent display means that the non-played content is transparent on the screen.
It is therefore desirable to provide a new transparent rear projection screen and projection system that addresses the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a transparent rear-projection screen and projection system that can transparent demonstration.
In order to achieve the above object, the present invention provides a transparent rear projection screen and a projection system, wherein the transparent rear projection screen comprises a light-transmitting layer made of transparent material and a plurality of diffusion layers embedded in the light-transmitting layer and spaced from each other; the euphotic layer comprises a projection surface and a viewing surface arranged opposite to the projection surface, and the diffusion layer is obliquely arranged from top to bottom from the projection surface to the viewing surface; incident light is incident to the diffusion layer from the projection surface, and is emitted from the viewing surface after being scattered by the diffusion layer to change the emergent angle of the incident light.
Preferably, the diffusion layer comprises a diffusion layer base surface obliquely embedded in the light-transmitting layer and a plurality of scattering microstructures convexly extending from the diffusion layer base surface to the projection surface direction; the incident light is incident to the diffusion layer from the projection surface, and is emitted from the viewing surface after being scattered by the scattering microstructures to change the emergent angle of the incident light.
Preferably, the scattering microstructures are prism microstructures.
Preferably, the cross section of the diffusion layer is zigzag.
Preferably, among the plurality of diffusion layers, the interval between adjacent two diffusion layers is the same.
Preferably, the diffusion layer is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.
Preferably, the light-transmitting layer is made of a transparent organic material.
The utility model also provides a projection system, projection system includes as above arbitrary transparent rear-projection screen with be used for producing the projector of incident light, the projector sets up transparent rear-projection screen is close to one side of plane of projection.
Preferably, the projector is arranged opposite to the transparent rear projection screen, and the incident light is incident to the transparent rear projection screen along a direction perpendicular to the transparent rear projection screen.
Preferably, the projector and the transparent rear projection screen are arranged in a staggered manner, so that the incident light and the transparent rear projection screen are crossed, and the incident light is incident to the transparent rear projection screen along a direction inclined from bottom to top.
Compared with the prior art, the transparent rear projection screen comprises a light-transmitting layer made of a transparent material and a plurality of diffusion layers embedded in the light-transmitting layer and arranged at intervals; the euphotic layer comprises a projection surface and a viewing surface arranged opposite to the projection surface, and the diffusion layer is obliquely arranged from top to bottom from the projection surface to the viewing surface; the transparent rear projection screen is placed on the roof, and when a person looks at the transparent rear projection screen on the ground, the sight line of the person and a horizontal plane form a supine view angle alpha; by setting the inclination angle of the diffusion layers and the distance between two adjacent diffusion layers, when the elevation angle alpha ranges from 20 degrees to 60 degrees and no incident light exists, the transparent rear projection screen seen by people is transparent. When incident light exists, the incident light is incident to the diffusion layer from the projection surface, is scattered by the diffusion layer to change the emergent angle of the incident light, and then is emitted from the viewing surface, so that people can see a projection picture clearly.
Drawings
In order to make the content of the invention clearer, the drawings needed for describing the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the invention, and other drawings can be obtained by those skilled in the art without inventive effort, wherein:
fig. 1 is a schematic diagram of the back scattering propagation of the incident light on the transparent rear projection screen according to the present invention;
fig. 2 is a schematic structural diagram of the transparent rear projection screen of the present invention;
FIG. 3 is a partially enlarged schematic view of the diffusion layer of the present invention;
FIG. 4 is a schematic view of a transparent rear projection screen and a projection system according to the present invention;
FIG. 5 shows another arrangement of the projector according to the present invention;
fig. 6 is a schematic view of a method for manufacturing a diffusion layer according to the present invention.
Detailed Description
In the following, embodiments of the present invention will be described clearly and completely by those skilled in the art without any creative work in conjunction with the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on all other embodiments in the utility model, all belong to the scope of the protection of the utility model.
Referring to fig. 1-6, the present invention provides a transparent rear projection screen 10, which includes a transparent layer 1 made of transparent material and a plurality of diffusion layers 2 embedded in the transparent layer 1 and spaced from each other; the euphotic layer 1 comprises a projection surface 11 and a viewing surface 12 arranged opposite to the projection surface 11, and the diffusion layer 2 is obliquely arranged from top to bottom from the projection surface 11 to the viewing surface 12; the incident light 3 enters the diffusion layer 2 from the projection surface 11, is scattered by the diffusion layer 2 to change the exit angle of the incident light 3, and then exits from the viewing surface 12.
In this embodiment, the transparent rear projection screen 10 is placed on the roof, and when a person looks at the transparent rear projection screen 10 on the ground, the person's sight line and the horizontal plane form a elevation angle α; by setting the inclination angle of the diffusion layers 2 and the distance between two adjacent diffusion layers 2, when the elevation angle alpha is in the range of 20-60 degrees and there is no incident light, the transparent rear projection screen 10 seen by people is transparent. When projection is performed, the incident light 3 enters the diffusion layer 2 from the projection surface 11, is scattered by the diffusion layer 2 to change the emergent angle of the incident light 3, and then is emitted from the viewing surface 12, so that people can clearly see a projection picture.
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.
Specifically, the diffusion layer 2 includes a diffusion layer base surface 21 embedded in the light-transmitting layer 1 in an inclined manner, and a plurality of scattering microstructures 22 protruding and extending from the diffusion layer base surface 21 toward the projection surface 11; the incident light 3 is incident to the diffusion layer 2 from the projection surface 11, and is scattered by the scattering microstructures 22 to change the exit angle of the incident light 3, and then is emitted from the viewing surface 12. The arrangement of the structure can effectively control the diffusion angle and the propagation direction of the incident light 3.
In the present embodiment, the diffusion layer 2 has a zigzag cross-section.
Preferably, in order to increase the scattering efficiency of the diffusion layer 2, in the present embodiment, the scattering microstructures 22 are prism microstructures.
In the present embodiment, the diffusion layer 2 is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane, and methyl methacrylate.
Further, in the present embodiment, the diffusion layer 2 is embedded in the transparent layer 1 in a manner that: firstly, an inclined structure is made on a transparent organic material, then the diffusion layer 2 is coated on the inclined surface, then the inclined structure is glued and filled, and the diffusion layer 2 is obliquely embedded in the transparent layer 1. Of course, the method is not limited to this manufacturing method.
The utility model also provides a projection system 100, projection system 100 includes as above transparent rear-projection screen 10 and the projector 20 that is used for producing incident light 3, projector 20 sets up transparent rear-projection screen 10 is close to one side of plane of projection 11.
It should be noted that the projector 20 may be placed according to actual situations, the projector 20 may be disposed opposite to the transparent rear-projection screen 10, and at this time, the incident light 3 is incident to the transparent rear-projection screen 10 along a direction perpendicular to the transparent rear-projection screen 10. Of course, the projector 20 may also be disposed in a staggered manner with respect to the transparent rear-projection screen 10, so that the incident light 3 intersects with the transparent rear-projection screen 10, and at this time, the incident light 3 enters the transparent rear-projection screen 10 along a direction inclined from bottom to top. In addition, because the incident light 3 emitted by the projector 20 has an angular distribution, different positions of the incident light 3 on the transparent rear-projection screen 10 and different incident angles of the incident light on the transparent rear-projection screen 10 have an effect on the uniformity of the brightness, and a piece of software can be added to the projector 20 to perform normalization adjustment on the projection light 3.
In the present embodiment, the intervals between two adjacent diffusion layers are the same among the plurality of diffusion layers 2. Of course, the distance between two adjacent diffusion layers can be adjusted according to actual requirements. For example, when the projector 20 and the transparent rear-projection screen 10 are disposed in a staggered manner, so that the incident light 3 intersects with the transparent rear-projection screen 10, the incident light 3 enters the transparent rear-projection screen 10 along a direction inclined from bottom to top. 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, and at this time, the distance between two adjacent diffusion layers 2 can be increased, so that the transparency of the transparent rear-projection screen 10 is improved, and the display effect is better.
Compared with the prior art, the transparent rear projection screen comprises a light-transmitting layer made of a transparent material and a plurality of diffusion layers embedded in the light-transmitting layer and arranged at intervals; the euphotic layer comprises a projection surface and a viewing surface arranged opposite to the projection surface, and the diffusion layer is obliquely arranged from top to bottom from the projection surface to the viewing surface; the transparent rear projection screen is placed on the roof, and when a person looks at the transparent rear projection screen on the ground, the sight line of the person and a horizontal plane form a supine view angle alpha; by setting the inclination angle of the diffusion layers and the distance between two adjacent diffusion layers, when the elevation angle alpha ranges from 20 degrees to 60 degrees and no incident light exists, the transparent rear projection screen seen by people is transparent. When incident light exists, the incident light is incident to the diffusion layer from the projection surface, is scattered by the diffusion layer to change the emergent angle of the incident light, and then is emitted from the viewing surface, so that people can see a projection picture clearly.
The above examples are only for clearly illustrating the present invention and are not to be construed as limiting the embodiments; the scope of the present invention includes, but is not limited to, the above embodiments, and all equivalent changes made by the shape and structure according to the present invention are included in the protection scope of the present invention.
Claims (10)
1. A transparent rear projection screen is characterized in that the transparent rear projection screen comprises a light transmitting layer made of transparent materials and a plurality of diffusion layers which are embedded in the light transmitting layer and are arranged at intervals; the euphotic layer comprises a projection surface and a viewing surface arranged opposite to the projection surface, and the diffusion layer is obliquely arranged from top to bottom from the projection surface to the viewing surface; incident light is incident to the diffusion layer from the projection surface, and is emitted from the viewing surface after being scattered by the diffusion layer to change the emergent angle of the incident light.
2. The transparent rear-projection screen according to claim 1, characterized in that the diffusion layer comprises a diffusion layer base surface embedded obliquely inside the light-transmissive layer and a plurality of scattering microstructures convexly extending from the diffusion layer base surface in the direction of the projection surface; the incident light is incident to the diffusion layer from the projection surface, and is emitted from the viewing surface after being scattered by the scattering microstructures to change the emergent angle of the incident light.
3. The transparent rear-projection screen according to claim 2, characterized in that the scattering microstructures are prismatic microstructures.
4. The transparent rear-projection screen according to claim 2, characterized in that the cross-section of the diffusing layer is saw-toothed.
5. The transparent rear-projection screen according to claim 1, wherein the spacing between adjacent ones of the plurality of diffuser layers is the same.
6. The transparent rear-projection screen according to claim 5, characterized in that the diffusion layer is made of any one of polycarbonate, polyethylene terephthalate, polyvinyl chloride, polyurethane and methyl methacrylate.
7. The transparent rear-projection screen according to claim 1, characterized in that the light-transmitting layer is made of a transparent organic material.
8. A projection system comprising a transparent rear-projection screen according to any of claims 1 to 7 and a projector for generating incident light, the projector being arranged on a side of the transparent rear-projection screen adjacent to the projection surface.
9. The transparent rear-projection screen of claim 8, wherein the projector is disposed directly opposite the transparent rear-projection screen and the incident light is incident on the transparent rear-projection screen in a direction perpendicular to the transparent rear-projection screen.
10. The transparent rear-projection screen of claim 8, wherein the projector and the transparent rear-projection screen are disposed in a staggered manner such that the incident light intersects the transparent rear-projection screen and the incident light is incident on the transparent rear-projection screen in a direction inclined from bottom to top.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255351.8U CN211718685U (en) | 2020-03-04 | 2020-03-04 | Transparent rear projection screen and projection system |
| PCT/CN2020/142126 WO2021174988A1 (en) | 2020-03-04 | 2020-12-31 | Transparent rear projection screen and projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020255351.8U CN211718685U (en) | 2020-03-04 | 2020-03-04 | Transparent rear projection screen and projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211718685U true CN211718685U (en) | 2020-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020255351.8U Active CN211718685U (en) | 2020-03-04 | 2020-03-04 | Transparent rear projection screen and projection system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN211718685U (en) |
| WO (1) | WO2021174988A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021174988A1 (en) * | 2020-03-04 | 2021-09-10 | 深圳光峰科技股份有限公司 | Transparent rear projection screen and projection system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4386249B2 (en) * | 2003-07-01 | 2009-12-16 | 三菱電機株式会社 | Diffusion structure plate for rear projection screen and rear projection screen |
| JP4487567B2 (en) * | 2004-01-05 | 2010-06-23 | 三菱電機株式会社 | Rear projection screen |
| US7852556B2 (en) * | 2004-07-06 | 2010-12-14 | Luminoz, Inc. | Total internal reflection fresnel lens systems, assemblies, and methods |
| JP4172502B2 (en) * | 2006-06-14 | 2008-10-29 | セイコーエプソン株式会社 | Screen, rear projector and image display device |
| CN104298063B (en) * | 2014-10-24 | 2017-03-29 | 苏州大学 | Transparent projection screens |
| CN205247047U (en) * | 2015-09-28 | 2016-05-18 | 厦门瑞屏电子科技有限公司 | Superstrong anti environment optical projection curtain |
| CN211718685U (en) * | 2020-03-04 | 2020-10-20 | 深圳光峰科技股份有限公司 | Transparent rear projection screen and projection system |
-
2020
- 2020-03-04 CN CN202020255351.8U patent/CN211718685U/en active Active
- 2020-12-31 WO PCT/CN2020/142126 patent/WO2021174988A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021174988A1 (en) * | 2020-03-04 | 2021-09-10 | 深圳光峰科技股份有限公司 | Transparent rear projection screen and projection system |
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| Publication number | Publication date |
|---|---|
| WO2021174988A1 (en) | 2021-09-10 |
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