LIQUID CRYSTAL DISPLAY DEVICE AND RETARDATION FOIL

摘要

In a liquid crystal display device the number of grey levels in increased by means a compensation foil comprising a layer having a cholesteric ordering with a helix pattern, in which the pitch of the helix is smaller than (0.26-0.31. DELTA n) mu m, in which DELTA n is the optical anisotropy of the anisotropic layer. Moreover, the viewing angle dependence will be more symmetrical by patterning the cholesteric ordering.