Projection system with forward projection optical screen

Abstract

The invention relates to a projection system with a forward projection optical screen. The projection system is composed of a forward projection screen (1) and a projection machine (2), the forward projection screen (1) comprises a substrate layer (4), a microprism array structure layer (5), a metal medium mirror surface reflective film (8) and a light diffuse reflection layer (9), the microprism array structure layer (5) is arranged on the side, facing the projection machine (2), of the substrate layer (4), and the microprism array structure layer (5) is composed of a bottom face (6), a projection machine incident ray shadow area (7) and an environment ray absorption layer (10). The projection system has the advantages that under the bright environment, the high gain and high contrast ratio are achieved, meanwhile, no surface glare exists, and the high-color reduction is achieved; a protection layer can be selectively attached to the outer side of the microprism array structure layer, and the protection layer has the advantages of being resistant to scratch, dust and aging.

Description

Technical field [0001] The invention relates to a projection system, in particular to a projection system with a forward projection optical screen. Background technique [0002] In recent years, as the brightness of the projector itself has increased, most projection screens need to be used in natural light or in a very bright environment. Due to technical problems, when using general glass bead screens, white plastic screens, gray screens, etc. to project images, the stronger the ambient light, the brighter the black pattern on the projected image will be, and the contrast of the projected image will be seriously reduced, and the color of the image will be affected by the The ambient light is superimposed and becomes lighter, resulting in unsatisfactory color reproduction. [0003] Therefore, it is very important to use projection screens in bright environments, especially forward projection screens, to solve the color reproduction performance of the projected image, especially t...

AI Technical Summary

Problems solved by technology

However, due to the inherent characteristics of the traceable reflection of the screen microbeads, if the observer 104 deviates too much from the direction of the traceable reflected light 105, the brightness of the projected image will drop sharply

Even if a light diffusion layer 103 is added on the side of the glass bead layer close to the projector to expand the viewing angle of the reflected light of the image, part of the reflected light 106 of the image will be absorbed by the blackened side wall 107 of the grating, which also reduces the The projected image shows brightness, especially at short distance forward projection, where the brightness loss is more severe

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