- Patent Title: Retardation film, and optical compensation layer, optical compensation polarizing plate, liquid crystal display device and organic EL display device each using said retardation film
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Application No.: US15030683Application Date: 2014-10-20
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Publication No.: US09671544B2Publication Date: 2017-06-06
- Inventor: Ryutaro Mukai , Tomohiro Abo
- Applicant: KANEKA CORPORATION
- Applicant Address: JP Osaka-shi
- Assignee: KANEKA CORPORATION
- Current Assignee: KANEKA CORPORATION
- Current Assignee Address: JP Osaka-shi
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2013-220070 20131023
- International Application: PCT/JP2014/077823 WO 20141020
- International Announcement: WO2015/060241 WO 20150430
- Main IPC: G02F1/13363
- IPC: G02F1/13363 ; G02B5/30 ; B29C55/06 ; C08J5/18 ; B29C55/04 ; B29D11/00 ; G02B1/111 ; G02F1/1335 ; B29K1/00 ; B29L11/00
Abstract:
The present invention achieves a phase difference film that is excellent in wavelength dispersion property, in-plane retardation, and film thickness, by using a polymeric material (i) which is composed of at least one type of cellulose derivative having a specific alkoxyl group substitution degree D1 and a specific 2-naphthoyl group substitution degree D2 and (ii) which has a specific total 2-naphthoyl group substitution degree D3.
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