- 专利标题: Phase difference film, polarization plate, and liquid crystal display device
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申请号: US14995671申请日: 2016-01-14
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公开(公告)号: US10215899B2公开(公告)日: 2019-02-26
- 发明人: Jun Takeda , Shunya Katoh , Michio Nagai , Yoji Ito , Masaya Suzuki
- 申请人: FUJIFILM Corporation
- 申请人地址: JP Tokyo
- 专利权人: FUJIFILM Corporation
- 当前专利权人: FUJIFILM Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Edwards Neils LLC
- 代理商 Jean C. Edwards, Esq.
- 优先权: JP2013-149622 20130718; JP2014-107922 20140526
- 主分类号: G02F1/1335
- IPC分类号: G02F1/1335 ; G02B5/30 ; G02F1/13363 ; G02F1/1337 ; G02F1/1343
摘要:
A liquid crystal (LC) display device uses a phase difference film which increases front contrast of the device, and a polarization plate. The film includes a first optical anisotropic layer, and a second optical anisotropic layer thereon, the first layer formed by fixing an LC compound in a homogeneous alignment state, has an order parameter (OP) of 0.75 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the second layer formed by fixing an LC compound in a homeotropic alignment state, has an OP of 0.60 to 0.95, and layer thickness of 0.3 μm to 3.0 μm, the OP which is denoted by OP=(A∥−A⊥)/(2A⊥+A∥), “A∥” which represents absorbance of the LC compound regarding light polarized parallel to an alignment direction, and “A⊥” which represents absorbance of the LC compound regarding light polarized vertical to the alignment direction.
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