Patent ID: 8470413
Filing Date: 2013-06-25
Classification: C09K,G02B,G02F,Y10T

Abstract:
1. A negative C-type retardation compensator for a liquid crystal display comprising: 1) a transparent base layer; and 2) a polyarylate coating layer which is layered on the transparent base layer and has a thio group or a sulfur oxide group in a polymer main chain thereof, wherein the polyarylate having the thio group or the sulfur oxide group in the polymer main chain is represented by Formula 1: wherein, a, b, c, and d are each independently an integer of 0, or 1 to 4, m and n are molar fractions, m+n=1, 0≦m≦1, and 0.001≦n≦0.4, R R W W wherein in the polyarylate coating layer, a retardation in a thickness direction which is defined by Equation 1 is negative, and an absolute value of the retardation is 10 nm or more: wherein, n n n d is a thickness of the coating layer.