Patent ID: 6416182
Filing Date: 2002-07-09
Classification: G02B,G02F,H04N

Abstract:
A projection type liquid crystal display device, including:irradiation means having a function of irradiating light emitted from a light source upon an irradiated surface; a liquid crystal display element for modulating the light; and projection means for projecting the light emitted from said liquid crystal display element, wherein said irradiation means comprises: at least one reflection mirror for reflecting the light from said light source to be collimated; a polarization beam splitter for dividing the light from the light source into P polarization light and S polarization light; reflection means being constructed with a reflection mirror for reflecting either one of the P polarization and S polarization lights in a same direction as the other; a first lens array, being constructed with a plurality of condenser lenses and being divided along an optical path between the P polarization and S polarization lights, for collecting the light emitted from said polarization means so as to form a plurality of secondary light source images of the P polarization and S polarization lights, respectively; and a second lens array, being constructed with a plurality of condenser lenses and being divided along an optical path between the P polarization and S polarization lights, and positioned in vicinity of where the plurality of secondary light source images of the P polarization and S polarization lights are formed respectively, wherein said first lens array is formed with a &lgr;/2 phase shifting plate for rotating a direction of polarization of either one of the P polarization and S polarization lights in a part thereof where either one of the P polarization and S polarization lights passes therethrough.