Patent ID: 8339546
Filing Date: 2012-12-25
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: first and second polarizing plates which are arranged such that respective transmission axes thereof are perpendicular to each other; a liquid crystal cell which is arranged between the first and second polarizing plates; a first viewing angle compensating film which is arranged between the first polarizing plate and the liquid crystal cell, and which includes discotic liquid crystal; and a second viewing angle compensating film which is arranged between the second polarizing plate and the liquid crystal cell, and which includes discotic liquid crystal; wherein the liquid crystal cell includes: wherein an aligning axis of the first viewing angle compensating film extends in the first molecular aligning direction, and an aligning axis of the second viewing angle compensating film extends in the second molecular aligning direction; wherein the aligning axis of the first viewing angle compensating film is substantially perpendicular to the aligning axis of the second viewing angle compensating film; wherein an angle between the transmission axis of the first polarizing plate and the first molecular aligning direction is substantially ½ of an angle between the first and second molecular aligning directions, and an angle between the transmission axis of the first polarizing plate and the aligning axis of the first viewing angle compensating film is substantially ½ of an angle between the first and second molecular aligning directions; wherein an angle between the transmission axis of the second polarizing plate and the second molecular aligning direction is substantially ½ of the angle between the first and second molecular aligning directions, and an angle between the transmission axis of the second polarizing plate and the aligning axis of the second viewing angle compensating film is substantially ½ of the angle between the first and second molecular aligning directions; wherein, where a refractive index anisotropy of a region of the liquid crystal layer with respect to blue wavelength light is represented by Δnb, a refractive index anisotropy of a region of the liquid crystal layer with respect to green wavelength light is represented by Δng, and a refractive index anisotropy of a region of the liquid crystal layer with respect to red wavelength light is represented by Δnr, the anisotropies satisfy the following ranges: wherein, where a layer thickness of the region of the liquid crystal layer with respect to the blue wavelength light is represented by db, a layer thickness of the region of the liquid crystal layer with respect to the green wavelength light is represented by dg, and a layer thickness of the region of the liquid crystal layer with respect to the red wavelength light is represented by dr, each of Δnb·db, Δng·dg, and Δnr·dr is set within a range of 450 nm to 550 nm.