Fresnel anti-light projections screen for ultra-short-focus projection system

Abstract

The invention relates to the technical field of the short-focus projection, and provides a Fresnel anti-light projections screen for an ultra-short-focus projection system. The Fresnel anti-light projections screen comprises an anti-scratch layer, an upper coloring layer, an upper prism layer, a lower coloring layer, a lower prism layer, a Fresnel lens layer, a reflecting layer and a light-absorbing layer arranged in order; streaky structures towards the anti-scratch layer are arranged on the upper prism layer and the lower prism layer, and the trends of the streaky structures of the upper prism layer and the lower prism layer are in vertical arrangement. Thereby, by arranging the upper prism layer and the lower prism layer, the traditional scattering layer is substituted, the incident light can diverge to the surrounding more effectively, the divergence degree is higher, the watching visual angle is greater, the screen speckles, the narrow visual angle, the center region dazzling andlike problems are effectively solved.

Description

technical field [0001] The invention relates to the technical field of short-focus projection, in particular to a Fresnel anti-light projection screen used in an ultra-short-focus projection system. Background technique [0002] Currently, ultra-short-throw projection screens are used as home theater screens. Such as figure 1 As shown, the projection screen generally includes an anti-scratch layer 1 , a colored layer 2 , a diffusion layer 8 , a Fresnel lens layer 5 , a reflective layer 6 and a light-absorbing layer 7 . The anti-scratch layer 1 can increase the surface hardness of the screen, and prevent scratch damage of a certain force. The coloring layer 2 is generally gray, light black, etc., which can greatly improve the contrast of projection display. The diffusion layer 8 functions to scatter incident light. [0003] The existing diffusion layer is made of a resin material with a transmittance greater than 85% uniformly added with diffusion particles (nanoscale to ...

AI Technical Summary

Problems solved by technology

Therefore, the large-angle area cannot be seen clearly, and the brightness of the viewing area is too high to cause glare

[0004] Therefore, the problem of speckle and narrow viewing angle not only reduces the viewing experience, but also limits its application in auditoriums, advertising displays and other fields that require a wide range and large viewing angles.

[0005] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

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