Invention Grant
- Patent Title: Phase difference film, polarization plate, and liquid crystal display device
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Application No.: US14995671Application Date: 2016-01-14
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Publication No.: US10215899B2Publication Date: 2019-02-26
- Inventor: Jun Takeda , Shunya Katoh , Michio Nagai , Yoji Ito , Masaya Suzuki
- Applicant: FUJIFILM Corporation
- Applicant Address: JP Tokyo
- Assignee: FUJIFILM Corporation
- Current Assignee: FUJIFILM Corporation
- Current Assignee Address: JP Tokyo
- Agency: Edwards Neils LLC
- Agent Jean C. Edwards, Esq.
- Priority: JP2013-149622 20130718; JP2014-107922 20140526
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02B5/30 ; G02F1/13363 ; G02F1/1337 ; G02F1/1343

Abstract:
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.
Public/Granted literature
- US20160131809A1 PHASE DIFFERENCE FILM, POLARIZATION PLATE, AND LIQUID CRYSTAL DISPLAY DEVICE Public/Granted day:2016-05-12
Information query
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