A screen for a projector and a projection system

Abstract

The invention discloses a screen for a projector and a projection system. The screen comprises a directing layer, a beam splitting layer and a base layer which are successively stacked, wherein the directing layer is used to direct projecting beams incident in a first direction range from the outside thereof to an interface between the directing layer and the beam splitting layer, and to make the projecting beams incident to the interface at an angle that is larger than an angle of incidence at which a total reflection is formed on the interface and then reflected back to the outside of the directing layer; the directing layer also is used to direct ambient light beams incident in a second direction range from the outside thereof to the interface between the directing layer and the beam splitting layer, and to make the ambient light beams incident to the interface at an angle that is less than or equal to an angle of incidence at which a total reflection is formed on the interface and then passing through the interface into the beam splitting layer; the refraction index of the beam splitting layer is less than that of the directing layer. In the aforementioned way, the screen and the projection system can reduce a glare phenomenon caused by the ambient light beams.

Description

technical field [0001] The invention relates to the technical field of projection, in particular to a screen used for a projector and a projection system. Background technique [0002] A projector is a device that projects images or videos onto a screen. The projector can project video signals played by computers, TVs, DVDs, etc. onto the screen, so that you can watch a larger picture than the computer or TV screen. . With the development of projection technology, in recent years, ultra-short-throw projectors have attracted more and more attention from users, and have become a hot spot in the projector market. Ultra-short-throw projectors can project large-format images at an extremely short projection distance. Compared with long-throw projectors, they are more space-saving and easy to install. [0003] When using a projector to project images or videos, the projection effect on the screen is not only related to the projector itself, but also the screen will affect the pr...

AI Technical Summary

Problems solved by technology

[0003] When using a projector to project images or videos, the projection effect on the screen is not only related to the projector itself, but also the screen will affect the projection effect

At present, the common projection screens on the market are generally white plastic screens, glass screens and metal screens, etc. However, when displaying images, such projection screens are easily affected by ambient light and cause glare. The phenomenon is more serious, making it difficult for ultra-short throw projectors to achieve the best projection effect due to the limitation of the projection screen

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