Patent ID: 8421965
Filing Date: 2013-04-16
Classification: G02F

Abstract:
1. A liquid crystal panel, comprising: a liquid crystal cell having a plurality of color filters having different colors and a liquid crystal layer which is provided in contact with the plurality of color filters, in which different thicknesses are set depending upon a region in contact with each of the plurality of color filters, and which further contains liquid crystal molecules aligned homogeneously, wherein the plurality of color filters comprise a green color filter and a blue color filter; a first polarizer which is provided on a side of the plurality of color filters of the liquid crystal cell, and whose absorption axis is directed in a direction substantially parallel to a major axis direction of the liquid crystal molecules under no voltage application; a second polarizer which is provided on a side of the liquid crystal layer of the liquid crystal cell, and whose absorption axis is directed in a direction substantially perpendicular to the major axis direction of the liquid crystal molecules; and only one retardation film, such retardation film being provided between the first polarizer and the plurality of color filters, and having an in-plane direction refractive index that is substantially uniform and a thickness direction refractive index that is smaller than the in-plane direction refractive index, wherein the second polarizer is placed on a light source side; a thickness direction retardation value Rth[550] of the retardation film with respect to light with a wavelength of 550 nm that is green light is represented by where nx 550 is a principal refractive index in a slow axis direction in a plane of the retardation film with respect to light with a wavelength of 550 nm, nz 550 is a principal refractive index in a thickness direction of the retardation film with respect to light with a wavelength of 550 nm, and d is a thickness of the retardation film; and the retardation value Rth[550] is in a range of an in-plane retardation value Re[550] of the liquid crystal cell with respect to light with a wavelength of 550 nm that is green light is represented by where nx 550 is a principal refractive index in a slow axis direction in a plane of the liquid crystal layer with respect to light with a wavelength of 550 nm, ny 550 is a principal refractive index in a fast axis direction in a plane of the liquid crystal layer with respect to light with a wavelength of 550 nm, and d G is a thickness of the liquid crystal layer in a region in contact with the green color filter; an in-plane retardation value Re[450] of the liquid crystal cell with respect to light with a wavelength of 450 nm that is blue light is represented by where nx 450 is a principal refractive index in a slow axis direction in a plane of the liquid crystal layer with respect to light with a wavelength of 450 nm, ny 450 is a principal refractive index in a fast axis direction in a plane of the liquid crystal layer with respect to light with a wavelength of 450 nm, and d B is a thickness of the liquid crystal layer in a region in contact with the blue color filter; and the in-plane retardation value Re[550] and the in-plane retardation value Re[450] satisfy a relationship of