Optics: image projectors – Light shield – mask – hood – or diaphragm
Reexamination Certificate
2006-11-07
2006-11-07
Perkey, W. B. (Department: 2851)
Optics: image projectors
Light shield, mask, hood, or diaphragm
C353S031000, C353S088000, C348S742000
Reexamination Certificate
active
07131734
ABSTRACT:
A projection system that can adjust color balance of incident light is provided. The projection system includes a light source, a spatial filter, an optical separator, a scrolling unit, a light valve, and a projecting lens unit. The spatial filter has a slit to adjust a divergent angle or etendue of light emitted from the light source. The optical separator separates light passing through the spatial filter according to color of incident light. The scrolling unit has one or more spiral lens discs, which are formed by spirally arranging cylindrical lens cells, rotate, and scroll color beams separated by the optical separator. The light valve processes light passing through the scrolling unit according to an image signal and forms an image. The projecting lens unit magnifies the image formed on the light valve and projects the magnified image onto a screen.
REFERENCES:
patent: 5053934 (1991-10-01), Krebs
patent: 6288815 (2001-09-01), Lambert
patent: 6648476 (2003-11-01), Watanabe et al.
patent: 6765705 (2004-07-01), Ouchi
patent: 6854851 (2005-02-01), Yamasaki et al.
patent: 6877861 (2005-04-01), Cho et al.
patent: 6877865 (2005-04-01), English et al.
patent: 6921171 (2005-07-01), Lee et al.
patent: 2001/0038483 (2001-11-01), Lambert
patent: 2003/0030776 (2003-02-01), Jeon
patent: 2004/0196644 (2004-10-01), Kim et al.
patent: 2005/0012904 (2005-01-01), Kim et al.
patent: 0 653 658 (1995-05-01), None
patent: 0 723 174 (1996-07-01), None
patent: 1 253 787 (2002-10-01), None
English Language Abstract JP 2001324760; Published Nov. 22, 2001; Minolta Co. Ltd.
English Language Abstract JP 11125776; Published Oct. 21, 1997; Fuji Xerox Co. Ltd.
Cho Kun-ho
Kim Dae-sik
Kim Sung-ha
Lee Hee-joong
Perkey W. B.
Samsung Electronics Co,. Ltd.
Sever Andrew
Sughrue & Mion, PLLC
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