Invention Grant
- Patent Title: Optical functional film, retardation film, composition for forming optical functional layer and producing method of optical functional film
- Patent Title (中): 光学功能膜,延迟膜,光学功能层的形成用组合物和光学功能膜的制造方法
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Application No.: US12088260Application Date: 2006-09-28
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Publication No.: US08064136B2Publication Date: 2011-11-22
- Inventor: Keiji Kashima , Kenji Shirai , Takashi Kuroda , Takeshi Haritani
- Applicant: Keiji Kashima , Kenji Shirai , Takashi Kuroda , Takeshi Haritani
- Applicant Address: JP Tokyo-to
- Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee: Dai Nippon Printing Co., Ltd.
- Current Assignee Address: JP Tokyo-to
- Agency: Ladas & Parry LLP
- Priority: JP2005-285678 20050929; JP2005-285679 20050929; JP2005-285680 20050929
- International Application: PCT/JP2006/319281 WO 20060928
- International Announcement: WO2007/037317 WO 20070405
- Main IPC: G02B5/30
- IPC: G02B5/30

Abstract:
An optical functional film which exhibits excellent optical characteristics without using an alignment film, and having the excellent adhesion property between layers. The optical functional film includes: a substrate having a property as an optically negative C-plate, and an optical functional layer formed on the substrate and having a rodlike compound. The optical functional layer is formed directly on the substrate, and the rodlike compound forms a random homogeneous alignment in the optical functional layer.
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