Screen with high luminance and wide angle

Details Screen with high luminance and wide angle Screen with high luminance and wide angle

1979-03-29

1980-11-11

Wintercorn, Richard A.

350125, G03B 2160

Patent

active

042329396

ABSTRACT:
This invention relates to a reflector type screen suitable for use in a daylight room and which provides high luminance and a wide range of diffusion, wherein a specular surface is provided by an aluminum coating formed by vacuum evaporation on one side of a base plate of a transparent thermoplastic resin, and said specular surface is lined with a thin sheet of a flexible synthetic resin such as polyvinyl chloride thereby to protect the specular surface and to facilitate the subsequent processing. A transparent diffusing specular layer having a sandblast surface is formed on the other side of the base plate, and then lenticulars having a convex surface are formed in continuous rows by rolling with due caution not to damage the sandblast surface. The diffusing layer is prepared to have relatively low diffusing performance, e.g. 10 to 20%, thereby providing high luminance for viewers and a wide range of diffusion in the transverse direction.

REFERENCES:
patent: 3811750 (1974-05-01), Coulthard
patent: 4089587 (1978-05-01), Schudel

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