Patent ID: 6295108
Filing Date: 2001-09-25
Classification: G02F

Abstract:
A liquid crystal display device comprising:an STN liquid crystal element arranged to sandwich a nematic liquid crystal twist-aligned at an angle ranging from 180 degrees to 270 degrees between a first substrate having a first electrode and a second substrate having a second electrode;a retardation film provided outside of said second substrate;a polarizing film provided outside said retardation film;a quarter-wave film provided outside said first substrate and adapted to chance a linearly polarized light coming out of said first substrate into a circularly polarized light;a first cholesteric liquid crystal polymer sheet provided outside said quarter-wave film;a half-wavelength retardation film provided outside said first cholesteric liquid crystal polymer sheet;a second cholesteric liquid crystal polymer sheet provided outside said half-wavelength retardation film; anda light absorbing film provided outside said second cholesteric liquid crystal polymer sheet, whereinsaid first cholesteric liquid crystal polymer sheet and said second cholesteric liquid crystal polymer sheet have scattering center wavelengths different from each other and have twist directions in the same direction.