Patent ID: 6784960
Filing Date: 2004-08-31
Classification: G02B,G02F

Abstract:
A liquid-crystal display device having a display cell comprising;a layer of a nematic, liquid-crystal material disposed between two substantially parallel substrates, the nematic, liquid-crystal material having a twist angle which lies in a range of 60-120 degrees; first and second polarizers disposed with the substrates, the first and second polarizers having first and second polarizing directions; and first and second retardation foils disposed in a predetermined relationship with the first and second polarizers, wherein the first and second retardation foils respectively comprise polymerized or vitrified liquid-crystalline material comprising liquid-crystal molecules which respectively: a) have average orientations which respectively extend in first and second directions which directions are respectively parallel to first and second planes that are normal to the substrates, the first and second planes being oriented with respect to one another at an angle in a range of 60 to 120 degrees; and b) exhibit first and second average tilt angles relative to the substrates.