Patent ID: 7105212

Claim:
An optical compensatory sheet which consists of a polymer film containing a rod-shaped compound, which gives an ultraviolet absorption spectrum, in which the wavelength of λmax at the maximum absortion peak is shorter than 250 nm, wherein said spectrum of the rod-shaped compound is measured when the rod-shaped compound is in the form of a solution, wherein the polymer film has an Rth retardation value of Rth450 measured at the wavelength of 450 nm in the range of 30 to 160 nm, and an Rth retardation value of Rth590 measured at the wavelength of 590 nm in the range of 50 to 200 nm, said values of the Rth450 and Rth590 satisfying the condition of Rth590-Rth450≧2 nm.