Optics: image projectors – Composite projected image – Multicolor picture
Reexamination Certificate
2006-09-26
2006-09-26
Perkey, W. B. (Department: 2851)
Optics: image projectors
Composite projected image
Multicolor picture
C353S081000, C353S020000, C348S750000, C348S758000, C349S009000
Reexamination Certificate
active
07111942
ABSTRACT:
In a reflection-type image projecting unit, being applicable into a reflection-type image display apparatus, being superior in contrast and achieving small-sizing of the apparatus, together with a light source for use therein, a light flux including three (3) color components, R, G and B, emitted from a light source portion100, are modulated and synthesized by means of reflection-type liquid crystal panels221, 222and223in an optical engine200, which is constructed with three (3) prism-like polarization light beam splitters, to be emitted therefrom, wherein those three (3) prism-like polarization light beam splitters are so disposed, that the G-component light of the three component lights R, G and B modulated on the reflection-type liquid crystal panel elements penetrates through two (2) of the prism-like polarization light beam splitters231and232, to be emitted therefrom, while the others, the B-component light and the R-component light penetrate therethrough after being reflected thereupon, or they are reflected after penetrating therethrough, while taking the planes of polarization lights of the propagating lights into the consideration.
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Hirata Koji
Masuoka Nobuo
Ogura Naoyuki
Yatsu Masahiko
Hitachi , Ltd.
Perkey W. B.
Sever Andrew
Townsend and Townsend / and Crew LLP
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