Projection Screens and Projection Systems
A projection screen and projection technology, applied in the field of projection systems, can solve problems such as low yield, complicated process, and low optical efficiency, and achieve the effects of increasing yield, improving optical efficiency, and reducing costs
Active Publication Date: 2022-02-11
APPOTRONICS CORP LTD
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Problems solved by technology
However, since the size of the microstructure is very small, and the pitch is generally in the range of 25 to 250 microns, the process of selectively coating the optical functional layer on the surface of the microstructure is very complicated, the yield is low, and the optical efficiency is not high.
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[0033] Hereinafter, specific embodiments according to the present invention will be described in detail with reference to the accompanying drawings. It should be emphasized that all dimensions in the drawings are only schematic and not necessarily shown in true scale, and thus are not limiting. For example, it should be understood that the thickness, thickness ratio and angle of each layer in the multilayer structure of the screen shown in the figure are not shown according to the actual size and ratio, but are only for the convenience of illustration.
[0034] 1. Overview of projection screen and projection system
[0035] figure 2 A schematic diagram of a projection screen according to the invention is shown. The projection screen is formed by a surface microstructure layer 30 , a diffuser layer 40 and a reflective layer 50 . Wherein, the diffusion layer 40 and the reflective layer 50 can adopt any known suitable solutions. The surface microstructure layer 30 is a surfa...
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The invention discloses a projection screen and a projection system using the screen. The projection screen includes a surface microstructure layer, a light diffusion layer, and a light reflection layer arranged sequentially from the incident side of the projection light, wherein the light reflection layer is used to reflect the incident projection light to all parts of the viewer. Within the scope of the field of view, the light diffusion layer is used to increase the divergence angle of the outgoing light, and the surface microstructure layer includes a plurality of surface microstructure units, and a plurality of the surface microstructure units are formed on the projection screen. The surface microstructure units are arranged periodically in a line-symmetrical manner with respect to the vertical midline of the projection screen in the plane of , and each of the surface microstructure units includes a first inclined plane and a second inclined plane that intersect. Utilizing the angle-selective properties of the microstructure units of the reflective layer to reflect at least part of the light from the projector, while basically not reflecting ambient stray light toward the viewing area of the viewer, it has strong anti-ambient light characteristics and improves the contrast of the image .
Description
technical field [0001] The present invention relates to projection screens and projection systems. In particular, the present invention relates to a projection screen capable of reducing Fresnel loss of the screen surface and a projection system using the same. Background technique [0002] In recent years, with the continuous improvement of the brightness of projectors, the advantages of projection display systems in large-scale home theater applications have begun to emerge. Compared with LCD TVs and OLED TVs, the projection display system is small in size, easy to install, and can easily realize a display screen larger than 100 inches, and the price of the whole system is relatively low. [0003] Traditional projectors are called telephoto projectors, which usually require a distance of more than 3 meters to project an 80-inch picture on the screen, and the transmitted light is incident on the screen at a relatively small incident angle, so it is also called Become a di...
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IPC IPC(8): G03B21/60
CPCG03B21/60
Inventor 王霖胡飞李屹
Owner APPOTRONICS CORP LTD