LIQUID CRYSTAL COMPOSITION, PHASE DIFFERENCE PLATE, IMAGE DISPLAY DEVICE, AND METHOD FOR CONTROLLING WAVELENGTH DISPERSION IN OPTICALLY ANISOTROPIC LAYER

摘要

A liquid crystal composition containing a polymerizable liquid crystal compound with reverse wavelength dispersion and one of an additive monomer A and an additive monomer B, wherein: the liquid crystal compound includes, in a molecule thereof, a main chain mesogen and a side chain mesogen, an optical axis of the main chain mesogen and an optical axis of the side chain mesogen being oriented in different directions when the compound is uniformly oriented, to have reverse wavelength dispersion property of birefringence Δn, and when the additive monomer is dispersed in the liquid crystal compound, the additive monomer A satisfies the following Expression (i), and the additive monomer B satisfies the following Expression (ii) within the wavelength range of λ=380 nm to 780 nm: ne>nea and nonob Expression (ii) (ne is a refractive index of the liquid crystal compound in a slow axis direction, no is a refractive index of the liquid crystal compound in a fast axis direction, nea and noa are refractive indices of the additive monomer A in the ne and no direction when dispersed in the liquid crystal compound, neb and neo are refractive indices of the additive monomer B in the ne and no direction when dispersed in the liquid crystal compound).

主权项

1. A liquid crystal composition comprising a polymerizable liquid crystal compound with reverse wavelength dispersion and one of an additive monomer A and an additive monomer B, wherein:
the polymerizable liquid crystal compound with reverse wavelength dispersion includes, in a molecule thereof, a main chain mesogen and a side chain mesogen bonded to the main chain mesogen, an optical axis of the main chain mesogen and an optical axis of the side chain mesogen being oriented in different directions when the polymerizable liquid crystal compound with reverse wavelength dispersion is uniformly oriented, whereby birefringence Δn of the polymerizable liquid crystal compound with reverse wavelength dispersion has reverse wavelength dispersion property; and when the additive monomer is dispersed in the polymerizable liquid crystal compound with reverse wavelength dispersion, the additive monomer A satisfies the following Expression (i) within the wavelength range of λ=380 nm to 780 nm, and the additive monomer B satisfies the following Expression (ii) within the wavelength range of λ=380 nm to 780 nm:
ne>nea and nonob  Expression (ii)(wherein ne is a refractive index of the polymerizable liquid crystal compound with reverse wavelength dispersion in a slow axis direction, no is a refractive index of the polymerizable liquid crystal compound with reverse wavelength dispersion in a fast axis direction,
nea is a refractive index of the additive monomer A in the ne direction when the additive monomer A is dispersed in the polymerizable liquid crystal compound with reverse wavelength dispersion, noa is a refractive index of the additive monomer A in the no direction when the additive monomer A is dispersed in the polymerizable liquid crystal compound with reverse wavelength dispersion, neb is a refractive index of the additive monomer B in the ne direction when the additive monomer B is dispersed in the polymerizable liquid crystal compound with reverse wavelength dispersion, and nob is a refractive index of the additive monomer B in the no direction when the additive monomer B is dispersed in the polymerizable liquid crystal compound with reverse wavelength dispersion).