Invention Grant
US08351001B2 Vertical alignment type liquid crystal display device with viewing angle characteristics improved by disposing optical plates 有权
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

Vertical alignment type liquid crystal display device with viewing angle characteristics improved by disposing optical plates
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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