Invention Grant
- Patent Title: Retardation film, polarizing plate, and liquid crystal display
- Patent Title (中): 延迟膜,偏光板和液晶显示器
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Application No.: US14325875Application Date: 2014-07-08
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Publication No.: US09383491B2Publication Date: 2016-07-05
- Inventor: Jun Takeda , Shunya Katoh , Michio Nagai , Yoji Ito
- 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: JP2013-154641 20130725; JP2014-109781 20140528
- Main IPC: C09K19/00
- IPC: C09K19/00 ; G02B5/30 ; G02F1/13363

Abstract:
A retardation film includes a first optically anisotropic layer having liquid crystal compounds fixed in a homogeneously aligned state and a leveling agent, and having an order parameter of 0.75 to 0.95 and a thickness of 0.3 to 3.0 μm; an intermediate layer including a resin having a solubility parameter SP value of 21.5 to 24.7, calculated by Hoy's method, the intermediate layer having a thickness of 3.0 μm or less; and a second optically anisotropic layer having liquid crystal compounds fixed in a homeotropically aligned state, and having an order parameter OP of 0.6 to 0.95 and a thickness of 0.3 to 3.0 μm, wherein OP is represented by the following equation; OP=(A∥−A⊥)/(2A⊥+A∥) where A∥ is absorbance of the liquid crystal compounds for light polarized parallel to an alignment direction, and A⊥ is absorbance of the liquid crystal compounds for light polarized perpendicular to the alignment direction.
Public/Granted literature
- US20150029445A1 RETARDATION FILM, POLARIZING PLATE, AND LIQUID CRYSTAL DISPLAY Public/Granted day:2015-01-29
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