Patent ID: 9268076
Filing Date: 2016-02-23
CPC Classification: B32B,G02B,G02F

Claim Text:
1. An optical compensation layer wherein the compensation layer is a coating layer comprising an unstretched film consisting of at least one N-substituted maleimide polymer resin, wherein the at least one N-substituted maleimide polymer resin consists of one or more residue units selected from the group consisting of an N-n-butylmaleimide residue unit, an N-isobutylmaleimide residue unit, an N-s-butylmaleimide residue unit, an N-t-butylmaleimide residue unit, an N-hexylmaleimide residue unit, and an N-octylmaleimide residue unit, and wherein when two arbitrary axes perpendicular to each other in the plane of the coating layer are referred to as x-axis and y-axis, respectively, and the out-of-plane direction is referred to as z-axis, then the coating layer satisfies the three-dimensional refractive-index relationship nx≈ny>nz, wherein nx is the refractive index in the x-axis direction, ny is the refractive index in the y-axis direction, and nz is the refractive index in the z-axis direction.