Invention Grant
US08179501B2 Liquid crystal display device having an elliptical polarizer with first and second anisotropic layers
有权
具有具有第一和第二各向异性层的椭圆偏振片的液晶显示装置
- Patent Title: Liquid crystal display device having an elliptical polarizer with first and second anisotropic layers
- Patent Title (中): 具有具有第一和第二各向异性层的椭圆偏振片的液晶显示装置
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Application No.: US12674799Application Date: 2008-08-18
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Publication No.: US08179501B2Publication Date: 2012-05-15
- Inventor: Yuji Takahashi , Satoru Ikeda , Tetsuya Uesaka
- Applicant: Yuji Takahashi , Satoru Ikeda , Tetsuya Uesaka
- Applicant Address: JP Tokyo
- Assignee: Nippon Oil Corporation
- Current Assignee: Nippon Oil Corporation
- Current Assignee Address: JP Tokyo
- Agency: Panitch Schwarze Belisario & Nadel LLP
- Priority: JP2007-225063 20070831; JP2008-013905 20080124
- International Application: PCT/JP2008/065058 WO 20080818
- International Announcement: WO2009/028428 WO 20090305
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
An elliptical polarizer is provided having excellent viewing angle improving effects. The elliptical polarizer includes a polarizer, a first optical anisotropic layer, and a second optical anisotropic layer, laminated in this order. The first optical anisotropic layer satisfies the requirements of 0.8≦NZ1≦1.6 and 120≦Re1≦250 and is disposed so that the slow axis thereof is orthogonal to the absorption axis of the polarizer. The second optical anisotropic layer is a liquid crystal film having a retardation value in the plane of 30 to 150 nm with respect to a 550 nm wavelength light and fixed in a nematic hybrid alignment wherein the average tilt angle of the liquid crystal molecules of a liquid crystalline polymer exhibiting a positive optical uniaxiality, and is disposed so that the aligned direction thereof is parallel to the absorption axis of the first polarizer. The elliptical polarizer is used in a TN type liquid crystal display device so that the second optical anisotropic layer is disposed on the liquid crystal cell side.
Public/Granted literature
- US20110116004A1 ELLIPTICAL POLARIZER AND LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2011-05-19
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