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US 2006/0216435 A1Published application
Optical compensation film, polarizing plate and liquid crystal display
AssigneeFuji Photo Film Co., Ltd.
InventorRyo Nakamura
Life of this patent
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Abstract
An optical compensation film is provided and includes a first optically anisotropic layer and a second optically anisotropic layer. It is characterized in that the first optically anisotropic layer includes discotic liquid crystal and the second optically anisotropic layer has an Re(550) value of 15 to 150 nm and an Rth(550) value of −40 to 10 nm, and a polarizing plate using such an optical compensation film.
Claims7
An optical compensation film comprising:
- a first optically anisotropic layer formed form a discotic liquid crystalline compound;
- and
- a second optically anisotropic layer having an Re(550) of 15 to 150 nm and an Rth(550) of −40 to 10 nm, wherein Re(λ) is an in-plane retardation by nm at a wavelength of λ nm, and Rth(λ) is a thickness-direction retardation by nm at a wavelength of λ nm.
A liquid crystal display comprising:
- a polarizer;
- a liquid crystal cell driven in ECB mode;
- and
- an optical compensation film comprising:
- a first optically anisotropic layer formed form a discotic liquid crystalline compound;
- and a second optically anisotropic layer having an Re(550) of 15 to 150 nm and an Rth(550) of −40 to 10 nm, wherein Re(λ) is an in-plane retardation by nm at a wavelength of λ nm, and Rth(λ) is a thickness-direction retardation by nm at a wavelength of λ nm,
- wherein
- a transmission axis of the polarizer and a slow axis of the second optically anisotropic layer are parallel,
- the slow axis of the second optically anisotropic layer forms an angle of 45 degrees with respect to a slow axis of the first optically anisotropic layer, and
- the slow axis of the first optically anisotropic layer and a slow axis of the liquid crystal cell are orthogonal to each other.
7 more elements
Dependencies are inferred from the claim text.