Optics: image projectors – Composite projected image – Multicolor picture
Reexamination Certificate
2004-06-04
2008-08-26
Blackman, Rochelle (Department: 2862)
Optics: image projectors
Composite projected image
Multicolor picture
C353S037000, C353S084000, C353S098000, C359S003000, C359S015000, C359S027000, C359S028000, C359S449000, C359S634000, C348S750000, C348S758000, C349S008000
Reexamination Certificate
active
07416306
ABSTRACT:
A reflection-type laser projector (100) projects modulated laser beams outputted from a laser projection unit (40), on a screen, wherein a reflector (112) as a constituent of the screen (110) has reflection characteristics of reflecting, among the incident light, only laser beams of three colors of red, blue, and green, which are projected from the laser projection unit (40) and light in the neighboring wavelength band, and transmitting light in other wavelength bands, thereby preventing pictures on the screen (110) from becoming hard to be seen due to effects of indoor illumination or light from outdoors.
REFERENCES:
patent: 6392766 (2002-05-01), Gnaedig et al.
patent: 2000-197069 (2000-07-01), None
patent: 2001-507819 (2001-06-01), None
patent: 96/038757 (1996-12-01), None
Translation of JP 2000-197069, Jul. 14, 2000.
Kasazumi Ken'ichi
Kitaoka Yasuo
Mizuuchi Kiminori
Yamamoto Kazuhisa
Blackman Rochelle
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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