| 摘要 |
PURPOSE: Disclosed is a liquid crystal display device characterized by a wide viewing angle, high display quality and fast response by using a homogeneously aligned liquid crystal display element with fast response and improving the viewing angle dependence with an optical retardation plate of a kind and composition different from the conventional one. CONSTITUTION: The liquid crystal display device is provided with a pair of polarizers arranged on the both sides of the liquid crystal display element and a tilted optical retardation plate containing an index ellipsoid having three principal refractive indexes na, nb, nc. The liquid crystal layer contains the liquid crystal molecules. Directions and sizes of the pretilt angles of the liquid crystal molecules arranged on each of the alignment layers are mutually the same. The liquid crystal layer is aligned homogeneously. A relation na=nb>nc holds with respect to the three principal refractive indexes na, nb, nc of the index ellipsoid. The direction of the principal refractive index nc which is in parallel with the normal of the tilted optical retardation plate surface and the direction of the principal refractive index na or nb in the surface are inclined by taking the direction of the principal refractive index of either na or nb as an axis.
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