Patent ID: 8477274
Filing Date: 2013-07-02
Classification: G02F

Abstract:
1. A liquid-crystal display device comprising: a liquid-crystal cell comprising a liquid-crystal layer that aligns vertically to the substrate thereof in a black state, two polarizing elements that are disposed to sandwich the liquid-crystal cell therebetween in a manner that their absorption axes are perpendicular to each other, and retardation films having equivalent optical anisotropy that are disposed between each of the two polarizing elements and the liquid-crystal cell, wherein the retardation films comprise a cellulose acylate and a liquid-crystal compound, and satisfy following formulas (I) to (VII): wherein Re(λ) means retardation [nm] in plane of each of the films measured at a wavelength λ [nm]; and Rth(λ) means retardation [nm] along thickness direction of each of the films measured at a wavelength λ [nm]; wherein the retardation films are cellulose acylate films formed of a composition comprising the cellulose acylate, the liquid-crystal compound and a plasticizer having a maximum absorption wavelength λmax of at most 250 nm.