An optical compensatory sheet comprises a transparent substrate, an orientation layer and an optically anisotropic layer in order. The optically anisotropic layer comprises discotic liquid crystal molecules. The orientation layer comprises a denatured polyvinyl alcohol having a hydrocarbon group containing...http://www.google.com/patents/US6726965?utm_source=gb-gplus-sharePatent US6726965 - Optical compensatory sheet comprising substrate, orientation layer and optically anisotropic layer
