Liquid crystal cells – elements and systems – Liquid crystal system – Projector including liquid crystal cell
Patent
1997-02-13
1998-09-22
Sikes, William L.
Liquid crystal cells, elements and systems
Liquid crystal system
Projector including liquid crystal cell
349 8, 353 31, G02F 11335, G03B 2100
Patent
active
058122230
ABSTRACT:
An LCD projector which has a white light source for emitting a randomly polarized luminous flux, and a plurality of LCD panels for modulating luminous fluxes that are transmitted through the LCD panels. The LCD projector also includes four reflecting devices. The first reflecting device reflects a first portion of the luminous flux having a first polarization characteristic and a wavelength which is within a first predetermined range of wavelengths, to the first LCD panel. The second reflecting device reflects a second portion of the luminous flux that is not reflected to the first LCD panel, to the second LCD panel. The second portion of the luminous flux has the first polarization characteristic and a wavelength which is within a second predetermined range of wavelengths. The third reflecting device reflects a third portion of the luminous flux that is not reflected to the second LCD panel, to the third LCD panel. The third portion of the luminous flux has the first polarization characteristic and a wavelength which is within a third predetermined range of wavelengths. The fourth reflecting device reflects a fourth portion of the luminous flux that is not reflected to the third LCD panel, to the fourth LCD panel. The fourth portion of the luminous flux has a second polarization characteristic.
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Asahi Kogaku Kogyo Kabushiki Kaisha
Sikes William L.
Ton Toan
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