Double-sided projection screen and double-sided projection system with same

Abstract

The invention relates to a double-sided projection screen. The double-sided projection screen comprises a transparent projection layer and a rear projection layer which are arranged in parallel, the transparent projection layer presents a real world environment behind the screen while performing diffuse reflection on preset reflected light to realize orthographic projection, and the rear projection layer is freely switched between a fog state and a transparent state. The invention also provides a double-sided projection system using the double-sided projection screen. The projection system canrealize double-sided projection by using one projector, the watching of personnel inside and outside is satisfied, the projection system can realize free switching between orthographic projection andrear projection as required, the fog effect of the rear projection technology can also play an anti-theft role, and the projection system can be applied to scientific and technological places such asshopping malls, museums, exhibition halls and show rooms.

Description

technical field [0001] The invention relates to a double-sided projection screen, in particular to a double-sided projection screen and a double-sided projection system with the screen. Background technique [0002] In modern society, projection technology is widely used in business, education, entertainment, family and other fields, and has become an indispensable means of information dissemination in many occasions. In order to achieve a good projection display effect, in addition to choosing a suitable projector, the choice of projection screen is also very important. At present, the common projection screens on the market can be divided into glass bead screens, white plastic screens, gray optical screens, metal screens, etc. according to the texture of the screen surface. Generally, projection screens are divided into front projection and rear projection. Front projection means that the projector and the observer are on the same side of the screen, and rear projection m...

AI Technical Summary

Problems solved by technology

This type of transparent display is expensive, and usually has a single direction, and the imaging on the other side is usually blurry or cannot be clearly imaged, which greatly limits the application scenarios

There are some opaque screens on the market that can realize double-sided projection imaging, but they cannot provide the effect of transparent display

PDLC dimming glass or PDLC film (polymer dispersed liquid crystal film), can be freely switched between transparent state and fog state, and can be used as rear projection film in fog state, but neither of them can realize transparent projection

[0004] At present, the projection screen with transparent display cannot balance the projection effect and transparency, and cannot realize double-sided projection, let alone realize free switching between front projection and rear projection and other application scenarios.

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