3D rear projection screen and method for manufacturing same

Abstract

The invention provides a method for manufacturing a 3D rear projection screen. A spraying material is sprayed to a transparent or semitransparent medium, and the spraying material comprises the components of optical microparticles and light stabilizing agent. The spraying imaging material comprises 30-38 parts of diluting agent, 40-60 parts of transparent varnish, 30-50 parts of curing agent, 30-40 parts of optical microparticles, 20-30 parts of delustering powder, 5-15 parts of pigment, 10-20 parts of silver powder or metallic paint, 5-15 parts of light stabilizing agent, 5-10 parts of inorganic flame retarding agent and 0.2-3 parts of oxidation inhibiting agent. The spraying method comprises the following steps of: (1) uniformly mixing the imaging material, and pouring the mixed imaging material into a spray can of a spray gun; (2) spraying the imaging material onto a transparent or semitransparent planar, curved or spherical attachment; and (3) forming a thin film 0.8-3 mm thick. With the method provided by the invention, the display luminance, the viewing angle and the definition of the traditional 3D rear projection can be increased effectively, the maximum manufacturing size of the rear projection screen can be increased, and the manufacturing cost of the rear projection is also reduced.

Description

technical field [0001] The invention relates to the technical field of projection screen manufacture and imaging, in particular to a method for manufacturing a 3D rear projection screen and the 3D rear projection screen obtained by the method. Background technique [0002] Most of the screens used by existing projectors are front projection, and the screens are exposed in the entire hall, and the projection beams traverse the space at a certain distance. The audience often sits along the horizontal plane in the hall, and most The audience's vision is interfered and affected by the projected light beam to varying degrees, which greatly affects the vision health. Another use of a projector is rear projection, or rear projection. Rear projection screens project an image from behind the screen to the audience on the opposite side of the screen. Because it has little effect on vision, it is more suitable for viewing in various environmental conditions. Rear projection screen i...

AI Technical Summary

Problems solved by technology

Due to the refraction and reflection of the light in the rear projection equipment (generally one or more reflectors or lenses are added to the projection light path) part of the loss, and the rear projection screen itself absorbs part, resulting in the current rear projection screens generally have image defects. Important problems such as clarity and uneven brightness of the subtitle screen have affected the quality of viewing by the audience

Especially the biggest disadvantage of the general rear projection screen: the center brightness is high, and the sun effect appears in the center of the screen. At present, even the center brightness and edge brightness uniformity of the more advanced optical projection lens are about 25% different.

However, none of these screens can achieve good unity or balance of contrast, brightness and clarity, and the display effect is not as good as that of Fresnel lens screens.

[0005] Because the existing rear projection screens have the above-mentioned many defects such as brightness, viewing angle, clarity and price, however, in many fields requiring large-scale screens, such as academic exchanges, school teaching, public information release, outdoor advertising Wait, the rear projection screen plays an irreplaceable role