Invention Grant
- Patent Title: Phase difference film, circularly polarizing plate, and display device
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Application No.: US18511449Application Date: 2023-11-16
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Publication No.: US12032189B2Publication Date: 2024-07-09
- Inventor: Yuta Takahashi , Yusuke Furuki , Hiroki Kuwahara
- 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: JP 21092451 2021.06.01
- Main IPC: G02F1/1335
- IPC: G02F1/1335 ; G02B5/30 ; G02F1/13363

Abstract:
A phase difference film includes a small change in tint when the film is applied to a display device as a circularly polarizing plate in combination with a polarizer display device being observed from an oblique direction at all azimuthal angles. The film includes optically anisotropic layers X, Y, and Z in this order, in which layer X is an A-plate, and layers Y and Z are formed by fixing a first and second liquid crystal compound, respectively, twist-aligned along a helical axis extending in a thickness direction, one of the first and second liquid crystal compounds are rod-like liquid crystal compounds, the other first and the second liquid crystal compounds are disk-like liquid crystal compounds, and an in-plane slow axis of layer X is parallel to an in-plane slow axis on a surface of layer Y on layer X side.
Public/Granted literature
- US20240118474A1 PHASE DIFFERENCE FILM, CIRCULARLY POLARIZING PLATE, AND DISPLAY DEVICE Public/Granted day:2024-04-11
Information query
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