Patent ID: 6937308

Claim:
A display comprising an in-plane switching (IPS) mode liquid crystal cell, a polarizer, and a compensation film, the compensation film containing a positively birefringent material oriented with its optic axis tilted in a plane perpendicular to the liquid crystal cell plane, wherein the optic axis is, (I) in the case of homogeneous type IPS cell, tilted as follows: (a) in the case of a uniformly tilted compensation film the optic axis is tilted at an angle so that 0<θ 1 ≦10°; (b) in the case of a decreasingly tilted compensation film the optic axis is tilted at an angle so that 10≦θ 2 ≦20° and 0≦θ 3 ≦10°; (c) in the case of a increasingly tilted compensation film the optic axis is tilted at an angle so that 0≦θ 2 ≦10° and 10≦θ 3 ≦20 °; and (II) in the case of a twist type IPS cell, tilted as follows (a) in the case of a uniformly tilted compensation film the optic axis is tilted at an angle so that 0<θ 1 <6°; (b) in the case of a decreasingly tilted compensation film the optic axis is tilted at an angle so that 0<θ 2 ≦8° and 0≦θ 3 ≦4°; (c) in the case of a increasingly tilted compensation film the optic axis is tilted at an angle so that 0≦θ 2 ≦4° and 0<θ 3 ≦8°.