Invention Grant
- Patent Title: Optical film, production method of optical film, optically-compensatory film, polarizing plate and liquid crystal display device
- Patent Title (中): 光学膜，光学膜的制造方法，光学补偿膜，偏振片和液晶显示装置
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Application No.: US11812317Application Date: 2007-06-18
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Publication No.: US08350995B2Publication Date: 2013-01-08
- Inventor: Hajime Nakayama , Yoji Ito
- Applicant: Hajime Nakayama , Yoji Ito
- Applicant Address: JP Minato-Ku, Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Minato-Ku, Tokyo
- Agency: Buchanan Ingersoll & Rooney PC
- Priority: JP2006-168851 20060619
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02B6/10 ; C03B37/022
Abstract:
A production method of an optical film, including: a stretching step of stretching a film, wherein the film has a longitudinal direction, a width direction and a thickness direction, wherein the stretching is in either of the longitudinal direction or the width direction of the film; and a shrinking step of shrinking the film in either of the longitudinal direction or the width direction of the film, that is not the direction in which the film is stretched, wherein the film thickness in the thickness direction is increased as compared with the film thickness before at least one of the stretching step and the shrinking step.
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