Projection type liquid crystal display apparatus with green pola

Details Projection type liquid crystal display apparatus with green pola Projection type liquid crystal display apparatus with green pola

1997-05-15

1999-06-01

Gross, Anita Pellman

Liquid crystal cells, elements and systems

Liquid crystal system

Projector including liquid crystal cell

359498, 353 33, G02F 11335, G02B 530

Patent

active

059092599

ABSTRACT:
A projection type liquid crystal display apparatus includes at least three transmission type liquid crystal display panels and a four-division dichroic prism. The three liquid crystal display panels are driven by image signals of three primary colors respectively and the three liquid crystal display panels are illuminated by three primary color lights respectively so as to obtain transmission image lights having three channels whose luminances are modulated. The dichroic prism is used so as to synthesize the transmission image lights and the synthesized image light is projected via a projecting lens. One channel of the transmission image lights passes through the dichroic prism, and the other two channels are reflected by the dichroic prism, so that the transmission image lights are synthesized, and a polarization axis of the transmission image light of one channel passing through the dichroic prism is set to a first axis, the polarization axes of the transmission image lights of the other two channels reflected by the dichroic prism are set to a second axis, and the first and second polarization axes are made perpendicular to each other.

REFERENCES:
patent: 5098183 (1992-03-01), Sonehara
patent: 5105265 (1992-04-01), Sato et al.

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