Invention Grant
- Patent Title: Pressure-sensitive adhesive optical film and image display
- Patent Title (中): 压敏胶片和图像显示屏
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Application No.: US11955850Application Date: 2007-12-13
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Publication No.: US08372492B2Publication Date: 2013-02-12
- Inventor: Kohei Yano , Akiko Ogasawara , Tsuyoshi Chiba , Yuusuke Toyama , Shinichi Inoue , Masayuki Satake
- Applicant: Kohei Yano , Akiko Ogasawara , Tsuyoshi Chiba , Yuusuke Toyama , Shinichi Inoue , Masayuki Satake
- Applicant Address: JP Ibaraki-shi, Osaka
- Assignee: Nitto Denko Corporation
- Current Assignee: Nitto Denko Corporation
- Current Assignee Address: JP Ibaraki-shi, Osaka
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2006-338754 20061215; JP2007-276416 20071024
- Main IPC: B32B7/12
- IPC: B32B7/12 ; B32B15/082

Abstract:
A pressure-sensitive adhesive optical film of the present invention comprises: an optical film comprising a transparent base film and a discotic liquid crystal layer on one side of the transparent base film; and a pressure-sensitive adhesive layer that is provided on the discotic liquid crystal layer, wherein the pressure-sensitive adhesive layer is made from a pressure-sensitive adhesive containing an acrylic polymer comprising an alkyl(meth)acrylate (a1) and a ring structure-containing (meth)acrylate (a2) as monomer units and having a weight average molecular weight of 1,000,000 to 3,000,000, and a crosslinking agent. The pressure-sensitive adhesive optical film has durability and can be prevented from causing display unevenness in a peripheral portion of a display screen.
Public/Granted literature
- US20080145572A1 PRESSURE-SENSITIVE ADHESIVE OPTICAL FILM AND IMAGE DISPLAY Public/Granted day:2008-06-19
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