Patent ID: 8243239

Claim:
An IPS (in-plane switching) mode liquid crystal display, comprising: 1) a first polarizing plate; 2) a liquid crystal cell; 3) a retardation film comprising a positive biaxial acryl-based film and a negative C plate; and 4) a second polarizing plate, wherein the retardation film has an in-plane retardation value represented by Equation 1, in the range of 60 to 150 nm, and a thickness retardation value represented by Equation 2, in the range of 30 to 120 nm: R in =( n x −n y )× d [Equation 1] R th =( n z −n y )× d [Equation 2] wherein n x is a refractive index in a direction in which the refractive index is highest in a plane direction of the film, n y is a refractive index in a direction that is vertical to the n x direction in the plane direction of the film, n z is a refractive index of the thickness direction, and d is the thickness of the film.