Optics: image projectors – Composite projected image – Multicolor picture
Reexamination Certificate
2005-01-11
2005-01-11
Nguyen, Judy (Department: 2851)
Optics: image projectors
Composite projected image
Multicolor picture
C353S031000, C353S081000
Reexamination Certificate
active
06840626
ABSTRACT:
A color separating/recombining unit used in liquid crystal projector using three reflection type liquid crystal panels. The color separating/recombining unit (20) has a cubic form comprising a light incidence surface (21) facing the light source unit (10), three light incidence/output surfaces (23), (24), (25) respectively facing liquid crystal panels (31), (32), (33), a light output surface (22) facing a projection optical system (40), and another surface (26). The color separating/recombining unit has thereinside a color separating/recombining means (50) that spectrally separates light shone from the light source (10) into three-primary-color components to allow them emit from corresponding light incidence/output surfaces (23), (24), (25) and to be reflected with their polarization directions rotated 90 degrees by the liquid crystal panels (31), (32), (33) disposed respectively facing the light incidence/output surfaces (23), (24), (25), then recombines them, and emits them from the light output surface (22) to the projection optical system (40).
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Ikeda Takashi
Konishi Kensuke
Kurosaka Yoshitaka
Obase Toshio
Nguyen Judy
Sanyo Electric Co,. Ltd.
Sever Andrew
Westerman Hattori Daniels & Adrian LLP
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