Optical film and method of manufacturing the same
AssigneeLG Chem, Ltd.
InventorsJeong-Min Choi, Kyung-Sik Kim, Min-Hee Lee, Jun-Geun Um, Sang-Min Kwak
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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.
Claims31
An optical film manufactured by a process comprising longitudinal and uniaxial stretching of an unstretched cycloolefin copolymer film, wherein the optical film 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.
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A layered optical film, comprising:
- a) a +C-plate;
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- b) an optical film that is disposed on the +C-plate, 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 method of manufacturing an optical film, the method comprising:
- longitudinally and uniaxially stretching an unstretched film while the ratio of a width to a length of a stretched portion of the film is controlled.
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Dependencies are inferred from the claim text.