Invention Grant
- Patent Title: Elliptical polarizer and vertical alignment type liquid crystal display device using the same
- Patent Title (中): 椭圆偏振器和使用其的垂直取向型液晶显示装置
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Application No.: US12994190Application Date: 2009-04-20
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Publication No.: US08134659B2Publication Date: 2012-03-13
- Inventor: Yuji Takahashi , Tetsuya Uesaka , Satoru Ikeda
- Applicant: Yuji Takahashi , Tetsuya Uesaka , Satoru Ikeda
- Applicant Address: JP Tokyo
- Assignee: JX Nippon Oil & Energy Corporation
- Current Assignee: JX Nippon Oil & Energy Corporation
- Current Assignee Address: JP Tokyo
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP2008-155516 20080613
- International Application: PCT/JP2009/001797 WO 20090420
- International Announcement: WO2009/150779 WO 20091217
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02B5/30

Abstract:
The present invention provides an elliptical polarizer with excellent viewing angle characteristics. The elliptical polarizer comprises at least a first polarizer, a first optically anisotropic layer, a second optically anisotropic layer, and a third optically anisotropic layer, laminated in this order, the first optically anisotropic layer satisfying [1] 50≦Re1≦500, [2] 30≦Rth1≦750, and [3] 0.6≦Rth1/Re1≦1.5, the second optically anisotropic layer satisfying [4] 0≦Re2≦20 and [5] −500≦Rth2≦−30, and the third optically anisotropic layer satisfying [6] 100≦Re3≦180, [7] 50≦Rth3≦600, and [8] 0.5≦Rth3/Re3≦3.5, wherein Re indicates the retardation value in the plane of each optically anisotropic layer and Rth indicates the retardation value in the thickness direction of each optically anisotropic layer.
Public/Granted literature
- US20110063547A1 ELLIPTICAL POLARIZER AND VERTICAL ALIGNMENT TYPE LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME Public/Granted day:2011-03-17
Information query
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