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US 4,309,073 AGranted
Translucent screen assembly
AssigneeSanyo Electric Co., Ltd.
InventorsItsuro Nishimura, Yoshimasa Takahashi
Life of this patent
Estimating the term…
Abstract
A screen assembly for use in projection type color television system includes a first layer of acrylic resin having a first surface formed with Fresnel lens and its second surface integrally formed with a second layer acrylic resin containing pigment for forming a diffuser.
Claims5
A screen assembly comprising:
- (a) a first layer consisting essentially of a translucent resin, having a first surface formed with a Fresnel lens and a second surface on the opposite side of said first layer from said first surface thereof;
- (b) a second layer comprising a resin mixed with a diffusion means, said second layer having a first surface which is integrally formed on the second surface of said first layer, wherein said first layer is thicker than said second layer;
- (c) a third layer consisting essentially of a translucent resin, said third layer having a first surface which is integrally formed on a second surface of said second layer, said second surface of said second layer being on the opposite side of said second layer from said first surface thereof, and said third layer having a second surface on the opposite side of said third layer from said first surface thereof, said second surface of said third layer being polished.
Dependencies are inferred from the claim text.