Patent ID: 6587179
Filing Date: 2003-07-01
Classification: G02F

Abstract:
A high contrast ratio reflective STN LCD structure comprising an upper glass substrate panel, a liquid crystal layer and a lower glass substrate panel, wherein:the upper glass substrate panel includes: an optical deflector laid on an uppermost side of the upper glass panel, the optical deflector having a horizontal penetration axis and a horizontal absorption axis normal to the penetration axis; a phase compensating film disposed under the optical deflector and having a quarter of wavelength and a slow axis; an upper glass panel laid under the phase compensating film; an upper electrode laid under the upper glass panel; and an upper alignment layer laid under the upper electrode; the liquid crystal layer is disposed under the upper alignment layer, a top portion of the liquid crystal layer being aligned by the upper alignment layer, the liquid crystal layer including numerous spacers connected with a bottom of the upper alignment layer, the liquid crystal layer being composed of numerous liquid crystal molecules; and the lower glass substrate panel is disposed under the liquid crystal layer, including: a lower alignment layer laid under the liquid crystal layer, a bottom of the liquid crystal layer being aligned by the lower alignment layer; a color-filter laid under the lower alignment layer and having numerous pixels, each pixel being composed of a red block, a green block and a blue block; a reflector laid under the color-filter; a lower electrode laid under the reflector; and a lower glass panel laid under the lower electrode, the liquid crystal molecules of the liquid crystal layer having torsion angle within 180Â° to 210Â°, the retardation value of the liquid crystal molecules being within 580 nm to 650 nm.