Patent ID: 7193669
Filing Date: 2007-03-20
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: a liquid crystal display element including a pair of substrates, a liquid crystal layer interposed between the pair of substrates, and an alignment film formed on a surface of at least one of the pair of substrates such that the alignment film faces the liquid crystal layer; a pair of polarizers disposed on both surfaces of the liquid crystal element to sandwich the liquid crystal element; and at least one optical phase element disposed between at least one of the pair of polarizers and the liquid crystal element, wherein an optical refractive ellipsoid of the optical phase element is tilted in a clockwise direction or a counterclockwise direction from the normal to a surface of the optical phase element, wherein a rate of variation of an ordinary refractive index no and a rate of variation of an extaordinary refractive index ne of a liquid crystal material of the liquid crystal layer with respect to a wavelength are both set in a range, wherein the rate of variation among extraordinary light refractive indices ne(450), ne(550), and ne(650) for light with wavelengths of 450 nm, 550 nm, and 650 nm, respectively, and the rate of variation among ordinary light refractive indices no(450), no(550), and no(650) for light with wavelengths of 450 nm, 550 nm, and 650 nm, respectively, have the relationship of: