Invention Grant
- Patent Title: Cellulose acylate film, optical compensation film, polarizing plate, and liquid crystal display device
- Patent Title (中): 纤维素酰化膜,光学补偿膜,偏光板和液晶显示装置
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Application No.: US11659577Application Date: 2005-08-12
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Publication No.: US07804565B2Publication Date: 2010-09-28
- Inventor: Yukito Saitoh , Ryouta Matsubara , Yoji Ito
- Applicant: Yukito Saitoh , Ryouta Matsubara , 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: JP2004-235974 20040813; JP2004-272531 20040917
- International Application: PCT/JP2005/015101 WO 20050812
- International Announcement: WO2006/016723 WO 20060216
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
A novel optical compensation film is disclosed. The film comprises a transparent film having a ratio Re/Rth(450 nm) of Re and Rth at 450 nm of 0.4 to 0.95 times as large as Re/Rth(550 nm) at 550 nm, having Re/Rth(650 nm) at 650 nm of 1.05 to 1.93 times as large as Re/Rth(550 nm), and having Rth at 550 nm ranging from 70 nm to 400 nm, where “Re” is an in-plane retardation and “Rth” is a thickness-direction retardation; and an optically anisotropic layer having an in-plane optical anisotropy, formed of a composition comprising a liquid-crystalline compound, in which molecules of the liquid-crystalline compound are fixed in an alignment state, wherein the direction of orthogonal projection, onto a plane of the transparent film, of a mean orientation direction of molecular symmetry axes of the liquid-crystalline compound at the interface on the transparent film side is 45° with respect to the in-plane slow axis of the transparent film.
Public/Granted literature
- US20080158483A1 Cellulose Acylate Film, Optical Compensation Film, Polarizing Plate, and Liquid Crystal Display Device Public/Granted day:2008-07-03
Information query
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