Invention Grant
- Patent Title: Optical film and liquid crystal display using the same
- Patent Title (中): 光学膜和液晶显示器使用相同
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Application No.: US12202716Application Date: 2008-09-02
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Publication No.: US07791696B2Publication Date: 2010-09-07
- Inventor: Toshiaki Shibue , Makoto Honda , Nobuo Kubo , Noriyasu Kuzuhara , Hiroki Umeda , Sota Kawakami , Takatoshi Yajima
- Applicant: Toshiaki Shibue , Makoto Honda , Nobuo Kubo , Noriyasu Kuzuhara , Hiroki Umeda , Sota Kawakami , Takatoshi Yajima
- Applicant Address: JP Tokyo
- Assignee: Konica Corporation
- Current Assignee: Konica Corporation
- Current Assignee Address: JP Tokyo
- Agency: Lucas & Mercanti, LLP
- Priority: JP11-299901 19991021; JP11-316958 19991108
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
Disclosed is an optically anisotropic film used for a liquid crystal display of a vertical alignment liquid crystal mode comprising a fatty acid cellulose aster film, a retardation value (Rt value) in the thickness direction of the fatty acid cellulose ester film is from 60 to 300 nm, and the number of luminescent points having a size exceeding 50 μm is zero per 250 mm2, and the number of luminescent points having a size of 5 to 50 μm is 200 or less per 250 mm2 when the fatty acid cellulose ester film is observed with two polarizing plates being provided on both surfaces of the fatty acid cellulose ester film so as to shield transmission light.
Public/Granted literature
- US20090002616A1 OPTICAL FILM AND LIQUID CRYSTAL DISPLAY USING THE SAME Public/Granted day:2009-01-01
Information query
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