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:
Aug. 07, 2012
Filed:
Oct. 30, 2008
Kei Obata, Miyagi, JP;
Jun Shimizu, Miyagi, JP;
Kentaro Okuyama, Miyagi, JP;
Mitsuo Arima, Miyagi, JP;
Mitsunari Hoshi, Miyagi, JP;
Kei Obata, Miyagi, JP;
Jun Shimizu, Miyagi, JP;
Kentaro Okuyama, Miyagi, JP;
Mitsuo Arima, Miyagi, JP;
Mitsunari Hoshi, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method of manufacturing the optical sheet is provided. The method includes: a first step of heating a composition containing a liquid crystal monomer or liquid crystal prepolymer and a photopolymerization initiator at a temperature equal to or higher than a melting point of the liquid crystal monomer or liquid crystal prepolymer and pressing the composition in a state where the composition is held between a master including a plurality of solid structures disposed continuously in one surface and having shape anisotropy in the one surface and a light transmission film disposed so as to face the solid structures of the master. The method also includes a second step of irradiating the composition with ultraviolet rays at a temperature lower than a phase transmission temperature to an isotropic phase to polymerize the liquid crystal monomer or liquid crystal prepolymer and, after that, separating the light transmission film from the master.