Patent ID: 8911837
Filing Date: 2014-12-16
Classification: C08J,C09K,G02B,G02F,Y10T

Abstract:
1. A retardation film comprising a thermoplastic polymer having at least a side chain component (A) oriented in a direction substantially orthogonal to a slow axis, wherein an absorption edge wavelength (λ cut-off ) of the side chain component (A) is 330 nm or more, an in-plane retardation value (Re[450]) at a wavelength of 450 nm is smaller than an in-plane retardation value (Re[650]) at a wavelength of 650 nm, and the difference (ΔRe 650-550 =Re[650]−Re[550]) between the in-plane retardation value (Re[650]) at a wavelength of 650 nm and an in-plane retardation value (Re[550]) at a wavelength of 550 nm is 10 nm or more, wherein the side chain component (A) is a substituent represented by the following general formula (b): wherein R