PHASE DIFFERENCE PLATE, CIRCULARLY POLARIZING PLATE, AND IMAGE DISPLAY DEVICE

摘要

A phase difference plate including an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen are oriented in different directions, whereby a birefringence Δn of the optically anisotropic layer has reverse wavelength dispersion property; and retardations of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations of the optically anisotropic layer satisfy specific relationship; and a circularly polarizing plate and a display device including the same.

主权项

1. A phase difference plate comprising an optically anisotropic layer obtained by curing a composition (A) containing a polymerizable liquid crystal compound with reverse wavelength dispersion and a polymerizable monomer, wherein:
the polymerizable liquid crystal compound with reverse wavelength dispersion has a main chain mesogen and a side chain mesogen bonded to the main chain mesogen in the molecule thereof; the main chain mesogen and the side chain mesogen of the polymerizable liquid crystal compound with reverse wavelength dispersion are oriented in different directions in the optically anisotropic layer, whereby a birefringence Δn of the optically anisotropic layer has reverse wavelength dispersion property; and retardations Re0 (450 nm), Re0 (550 nm), and Re0 (650 nm) at wavelengths of 450 nm, 550 nm, and 650 nm of a layer obtained by curing a composition (A0) in which the polymerizable monomer in the composition (A) is replaced by the polymerizable liquid crystal compound with reverse wavelength dispersion and retardations Re (450 nm), Re (550 nm), and Re (650 nm) at wavelengths of 450 nm, 550 nm, and 650 nm of the optically anisotropic layer satisfy relationship of the following expressions (i) and (ii):
Re0 (450 nm)/Re0 (550 nm)>Re (450 nm)/Re (550 nm)  Expression (i)Re0 (650 nm)/Re0 (550 nm)