Patent ID: 9096719
Filing Date: 2015-08-04
Classification: C08G,C08J,C09D,G02F

Abstract:
1. A non-stretched, non-photopolymerized polymer film for use in positive birefringence layers in liquid crystal displays, the film being stable at ambient conditions, the film having a positive birefringence greater than 0.002 throughout the wavelength range of 400 nm<λ<800 nm, the film having been cast onto a substrate from a solution of a soluble polymer having a moiety of wherein R wherein Mesogen is a rod-like optically anisotropic subunit (OASU) attached directly to the polymer backbone via at least one covalent bond, the Mesogen being oriented perpendicular to the polymer backbone such that the higher the perpendicularity of the Mesogens, the larger the value of the positive birefringence of the polymer film.