Compensation film and optical film and display device

Abstract

A compensation film includes a first retardation layer including a polymer having negative birefringence, and a second retardation layer including a liquid crystal having positive birefringence, where the first retardation layer has an in-plane retardation (R) of 320 nm to 1050 nm for incident light having wavelength of 550 nm, the second retardation layer has an in-plane retardation (R) of 180 nm to 910 nm for the incident light, an entire in-plane retardation (R) of the first and second retardation layers for the incident light is a difference between the in-plane retardations of the first and second retardation layers, an angle between slow axes of the first and second retardation layers is 85 to 95 degrees, and the entire in-plane retardation (R) of the first and second retardation layers for the wavelength of 450 nm, 550 nm and 650 nm satisfies R(450 nm)<R(550 nm)<R(650 nm).