Optics: image projectors – Unitary plural refracting surfaces
Patent
1998-06-02
2000-05-16
Dowling, William
Optics: image projectors
Unitary plural refracting surfaces
353 20, 349 9, G03B 2114
Patent
active
06062695&
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; a polarization beam splitter for dividing the light from the light source into P polarization light and S polarization light; a .lambda./2 phase shifting plate for rotating a direction of polarization of either one of the P polarization and S polarization lights; polarization means being constructed with a reflection mirror for reflecting either one of the P polarization and S polarization lights; a first lens array being constructed with a plurality of condenser lenses, for collecting the light emitted from said polarization means so as to form a plurality of secondary light source images; and a second lens array being constructed with a plurality of condenser lenses and positioned in vicinity of where the plurality of secondary light source images are formed.
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Kakuda Takashi
Matsuda Yutaka
Ouchi Satoshi
Ozawa Naohiro
Shiaki Takuya
Beard, Jr. R. William
Dowling William
Hitachi , Ltd.
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