High contrast ratio reflective STN LCD structure

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 180° to 210°, the retardation value of the liquid crystal molecules being within 580 nm to 650 nm.