The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 11, 2005
Filed:
Apr. 04, 2002
Makoto Murata, Shizuoka, JP;
Kensaku Higashi, Shizuoka, JP;
Makoto Murata, Shizuoka, JP;
Kensaku Higashi, Shizuoka, JP;
Tomoegawa Paper Co., Ltd., Tokyo, JP;
Abstract
The invention provides an optical sheet having and sufficiently exhibiting high light transparency and uniform light diffusivity. The optical sheet comprises transparent resin layersandand a fine particle layerconsisting of transparent fine particleswhich are arranged as a monoparticle layer between the transparent resin layersandin an embedded state, wherein the refractive indexes of said transparent resin layers are different from that of said transparent fine particle. The optical sheet is produced by a process which comprises at least a step of forming a transparent resin layer having at least temporary stickiness on a substrate, a step of forming a fine particle layer by covering said transparent resin layer with transparent fine particles so as to form a monoparticle layer and fixing them, and a step of laminating a transparent resin layer on said fine particle layer.