Patent ID: 7417700

Claim:
An optical film assembly for a liquid crystal display panel including a liquid crystal layer having a viewing angle of about 170 degree to about 250 degree in a clock direction with respect to a horizontal direction of the liquid crystal display panel and a twist angle of about −10 degree to about +10 degree, the optical film assembly comprising: a lower polarizer disposed under a lower substrate of the liquid crystal display panel, the lower polarizer including an absorption axis forming at an angle of about 8 degree to about 28 degree in a clockwise direction with respect to the horizontal direction of the liquid crystal display panel; a lower λ/2 retardation film disposed between the lower substrate and the lower polarizer, the lower λ/2retardation film including a first optical characteristics Δnd 1 of about 260 nm to about 280 nm, a slow axis of the lower λ/2 retardation film forming at an angle of about 113 degree to about 133 degree in the clockwise direction with respect to the horizontal direction; and a lower λ/4 retardation film disposed between the lower substrate and the lower λ/2 retardation film, the lower λ/4 retardation film including a second optical characteristics Δnd 2 of about 120 nm to about 140 nm, a slow axis of the lower λ/4 retardation film forming at an angle of about −1 degree to about 19 degree in the clockwise direction with respect to the horizontal direction, wherein ‘Δn’, ‘d 1 ’ and ‘d 2 ’ denote an anisotropy of a refractive index, a thickness of the lower λ/2 retardation film and a thickness of the lower λ/4 retardation film, respectively.