Liquid crystal display device, optical film and polarizing plate
AssigneeFUJIFILM Corporation
InventorsHajime Nakayama, Nobutaka Fukagawa
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Abstract
A liquid-crystal display device comprising at least a liquid-crystal cell, a first optically anisotropic layer and a second optically anisotropic layer is disclosed. The first optically anisotropic layer satisfies the following formula (a1), the second optically anisotropic layer has at least one optical axis, and at least one of the first and second optically anisotropic layers is formed according to a coating or transferring method. 10<Rth(548)/Re(548) (a1) [wherein Rth (λ) means the retardation (nm) in the thickness direction at a wavelength λ (nm].
Claims44
A liquid-crystal display device comprising at least a liquid-crystal cell, a first optically anisotropic layer and a second optically anisotropic layer,
- wherein the first optically anisotropic layer satisfies the following formula (a1), the second optically anisotropic layer has at least one optical axis, and at least one of the first and second optically anisotropic layers is formed according to a coating or transferring method.
- 10<Rth(548)/Re(548) (a1)
- [wherein Rth(λ) means the retardation (nm) in the thickness direction at a wavelength λ (nm)].
The liquid-crystal display device of claim 2, wherein thickness-direction retardation Rth of the first optically layer is a polymer film decreases with longer wavelength within a visible light range.
A liquid-crystal display device comprising at least a liquid-crystal cell, a first optically anisotropic layer satisfying the following formula (a6), and a second optically anisotropic layer,
- wherein the first optically anisotropic layer is a layer formed according to a coating or transferring method, of which thickness-direction retardation Rth decreases with longer wavelength within a visible light range;
- and
- the second optically is a layer formed according to a coating or transferring method, of which in-plane retardation Re and thickness-direction retardation Rth do not change depending on the wavelength within a visible light range, or increase with longer wavelength within a visible light range
- 0.5<Rth(548)/Re(548) (a6)
- [wherein Rth(λ) means the retardation (nm) in the thickness direction at a wavelength λ (nm)λ.
An optical film comprising at least a first optically anisotropic layer and a second optically anisotropic layer,
- wherein the first optically anisotropic layer satisfies the following formula (a1), the second optically anisotropic layer has at least one optical axis, and at least one of the first and second optically anisotropic layers is formed according to a coating or transferring method.
- 10<Rth(548)/Re(548) (a1)
- [wherein Rth(λ) means the retardation (nm) in the thickness direction at a wavelength λ (nm)].
An optical film comprising at least a liquid-crystal cell, a first optically anisotropic layer satisfying the following formula (a6) and a second optically anisotropic layer,
- wherein the first optically anisotropic layer is a layer formed according to a coating or transferring method, of which thickness-direction retardation Rth decreases with longer wavelength within a visible light range;
- and
- the second optically is a layer formed according to a coating or transferring method, of which in-plane retardation Re and thickness-direction retardation Rth do not change depending on the wavelength within a visible light range, or increase with longer wavelength within a visible light range
- 0.5<Rth(548)/Re(548) (a6)
- [wherein Rth(λ) means the retardation (nm) in the thickness direction at a wavelength λ (nm)].
Dependencies are inferred from the claim text.