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:
Feb. 21, 2012
Filed:
Nov. 20, 2007
Jeong-min Choi, Daejeon Metropolitan, KR;
Kyung-sik Kim, Daejeon Metropolitan, KR;
Min-hee Lee, Daejeon Metropolitan, KR;
Jun-geun Um, Suwon-si, KR;
Sang-min Kwak, Daejeon Metropolitan, KR;
Jeong-Min Choi, Daejeon Metropolitan, KR;
Kyung-Sik Kim, Daejeon Metropolitan, KR;
Min-Hee Lee, Daejeon Metropolitan, KR;
Jun-Geun Um, Suwon-si, KR;
Sang-Min Kwak, Daejeon Metropolitan, KR;
LG Chem, Ltd., Seoul, KR;
Abstract
Disclosed is an optical film that is manufactured by using longitudinal and uniaxial stretching of an unstretched cycloolefin copolymer film and has an in-plane retardation of 100 to 150 nm and a thickness retardation of 0 to −30 nm at a wavelength of 550 nm, a polarizing plate and a liquid crystal display including the same, and a method of manufacturing the optical film. The method includes longitudinally and uniaxially stretching the unstretched film while a ratio of a width to a length of a stretched portion of the film is controlled.