Patent ID: 6661483
Filing Date: 2003-12-09
Classification: G02F

Abstract:
A liquid crystal display device comprising:a polarization layer for transmitting therethrough only a linearly polarized component of incident light, which is polarized in a predetermined direction; a reflective layer for reflecting light; a single phase retardation layer disposed between the polarization layer and the reflective layer; and a super-twisted nematic liquid crystal layer disposed between the polarization layer and the reflective layer, wherein retardation value ReF of the phase retardation layer is selected to be approximately equal to a (1/4+K/2)th multiple of wavelength &lgr; of the incident light (where K is an integer not smaller than 0); product d1Ã—&Dgr;n1 of thickness d1 and optical anisotropy &Dgr;n1 of the liquid crystal layer is selected to be approximately equal to a (1/2+L/2)th multiple of the wavelength &lgr; of the incident light (where L is an integer not smaller than 0); and crossing angle &Dgr;&phgr; between an absorption axis of the polarization layer and a retardation axis of the phase retardation layer is selected to be larger than 0Â° and smaller than 45Â°, or larger than 45Â° and smaller than 90Â° to deviate from 45Â° by a small amount to provide an improved contrast.