Invention Grant
- Patent Title: Vertical alignment type liquid crystal display device with viewing angle characteristics improved by disposing optical plates
- Patent Title (中): 通过配置光学板来改善视角特性的垂直取向型液晶显示装置
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Application No.: US13328071Application Date: 2011-12-16
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Publication No.: US08351001B2Publication Date: 2013-01-08
- Inventor: Yoshihisa Iwamoto
- Applicant: Yoshihisa Iwamoto
- Applicant Address: JP Tokyo
- Assignee: Stanley Electric Co., Ltd.
- Current Assignee: Stanley Electric Co., Ltd.
- Current Assignee Address: JP Tokyo
- Agency: Holtz, Holtz, Goodman & Chick, PC
- Priority: JP2008-046597 20080227; JP2008-046599 20080227; JP2008-081583 20080326
- Main IPC: G02F1/1335
- IPC: G02F1/1335

Abstract:
First and second polarizers are disposed in cross-Nichol configuration. A liquid crystal cell is disposed between the two polarizers and establishes vertical alignment in a state of no voltage application. An even number of optical films having optical anisotropy and disposed between the liquid crystal cell and first polarizer. A retardation of the liquid crystal cell is in a range between 300 nm and 1500 nm; and each optical film satisfies nx>n≧z, an in-plane retardation is smaller than 300 nm, a thickness direction retardation is in a range between 50 nm and 300 nm, an angle between an in-plane slow axis of the optical film disposed nearest to the first polarizer and an absorption axis of the first polarizer is smaller than 45°, and the slow axes of mutually adjacent optical films are perpendicular to each other.
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