Patent ID: 8477274

Claim:
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): 30 ≦Re (550)≦80 (I) 70 ≦Rth (550)≦140 (II) Re (450)/ Re (550)<1 (III) Re (650)/ Re (550)>1 (IV) Rth (450)/ Rth (550)<1 (V) Rth (650)/ Rth (550)>1 (VI) 1.2 ≦Rth (550)/ Re (550)<2.6 (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.