Patent ID: 6937310
Filing Date: 2005-08-30
Classification: C08G,C09K,G02B,G02F

Abstract:
1. An optically transparent compensation film for Liquid Crystal Displays comprising an amorphous polymer layer disposed on a substrate wherein said amorphous polymer layer comprises a polymer with a glass transition temperature Tg above 180° C. and has an out-of-plane birefringence Δn th (λ) at a wavelength λ that satisfies both conditions (1) and (2): Condition (1) Δn th (λ) is more negative than −0.005 throughout the range of 370 nm<λ<700 nm; Condition (2) Δn th (λ 1 ) is more negative than Δn th (λ 2 ), for λ 1 <λ 2 throughout the range of 370 nm<λ<700 nm.