Optical diffusion film and process of producing optical diffusion film
First Claim
1. An optical diffusion film for rear projection type display devices, which comprises:
- a transparent base layer, a layer of transparent microspheres disposed on said transparent base layer so that each said transparent microsphere is partly embedded in said transparent base layer; and
a light absorbing layer formed over one side of said transparent base layer so as to leave each said transparent microsphere partly bare, said light absorbing layer comprising a coloring material;
wherein the coloring material comprises silver behenite.
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Accused Products
Abstract
A process of producing an optical diffusion film which comprises at least a transparent base layer on a transparent substrate, a layer of transparent microspheres over the transparent base layer and a light absorbing layer over said transparent base layer comprises the steps of: distributing transparent microspheres in a layer over the transparent base layer so that each the transparent microsphere is partly embedded in the transparent base layer; and by coating a solution layer of coloring material that is convertible into fine metal particles and treating the solution layer of coloring material under specified conditions so as thereby to convert the solution layer of coloring material into a layer of fine metal particles that are light absorbable.
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Citations
22 Claims
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1. An optical diffusion film for rear projection type display devices, which comprises:
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a transparent base layer, a layer of transparent microspheres disposed on said transparent base layer so that each said transparent microsphere is partly embedded in said transparent base layer; and
a light absorbing layer formed over one side of said transparent base layer so as to leave each said transparent microsphere partly bare, said light absorbing layer comprising a coloring material;
wherein the coloring material comprises silver behenite. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A process of producing an optical diffusion film which comprises at least a transparent base layer, a layer of transparent microspheres over said transparent base layer so that each said transparent microsphere is partly embedded in said transparent base layer;
- and a light absorbing layer over said transparent base layer leaving each said transparent microsphere partly bare, said optical diffusing film comprising the steps of;
forming a transparent base layer on a transparent substrate;
distributing transparent microspheres in a layer over said transparent base layer so that each said transparent microsphere is partly embedded in said transparent base layer; and
forming a light absorbing layer over said transparent base layer leaving each said transparent microsphere partly bare by coating a solution layer of coloring material; and
after coating the solution layer, treating said solution layer of coloring material so as thereby to convert said solution layer of coloring material into a layer of fine metal particles as said light absorbing layer;
wherein the coloring material is silver behenite. - View Dependent Claims (9, 10, 11, 12)
- and a light absorbing layer over said transparent base layer leaving each said transparent microsphere partly bare, said optical diffusing film comprising the steps of;
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13. An optical diffusion film for rear projection type display devices, which comprises:
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a transparent base layer;
a layer of transparent microspheres disposed on said transparent base layer so that each said transparent microsphere is partly embedded in said transparent base layer; and
a light absorbing layer formed over one side of said transparent base layer so as to leave each said transparent microsphere partly bare, said light absorbing layer comprising a coloring material, wherein the coloring material comprises an organometallic salt. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification