Patent ID: 6320634
Filing Date: 2001-11-20
Classification: G02B,G02F

Abstract:
A liquid crystal display adapted to be viewed at various angles with respect to a normal axis perpendicular to a major surface of the display, comprising:a polarizer layer;an analyzer layer;a liquid crystal layer disposed between the polarizer layer and the analyzer layer;a first electrode disposed between the polarizer layer and the analyzer layer and proximate to a first major surface of the liquid crystal layer;a second electrode disposed between the polarizer layer and the analyzer layer and proximate to a second major surface of the liquid crystal layer opposing the first major surface, the first and second electrodes being adapted to apply a voltage across the liquid crystal layer when the electrodes are connected to a source of electrical potential;a first positively birefringent O-plate compensator layer disposed between the polarizer layer and the analyzer layer, wherein the first O-plate layer comprises a liquid crystal polymer with its optical symmetry axis oriented at an oblique tilt angle with respect to a major surface of the first O-plate layer; anda second positively birefringent O-plate compensator layer disposed between the polarizer layer and the analyzer layer, wherein the second O-plate layer comprises a liquid crystal polymer with its optical symmetry axis oriented at an oblique tilt angle with respect to a major surface of the second O-plate layer,wherein the projections of the optical symmetry axes of the first and second O-plate layers, respectively, onto the major surface of the display are crossed with respect to each other.