Patent ID: 9261732
Filing Date: 2016-02-16
CPC Classification: G02B,G02F

Claim Text:
1. An optical compensation film for IPS or FFS-mode liquid crystal display devices, having a tilt angle β[°] satisfying 0<|β|45═, β[°] being defined as φ giving the minimum value of retardation R[φ] which is retardation measured for incident light coming in a direction tilted by φ° from a normal line relative to the film-plane, with the in-plane slow axis of the optical compensation film as a rotation axis; having retardation in plane at a wavelength of 550 nm, Re(550), of from −10 nm to 10 nm; and having retardation along the thickness direction at a wavelength of 550 nm, Rth(550), of from −30 nm to 30 nm, provided that Rth(550) is not equal to zero.