Optics: image projectors – Color filter
Reexamination Certificate
2004-07-14
2009-10-06
Dowling, William C (Department: 2851)
Optics: image projectors
Color filter
C359S443000
Reexamination Certificate
active
07597447
ABSTRACT:
Methods and apparatus are provided for color correction and contrast enhancement of projection displays. A visual display system includes a projector having a light source with a fixed spectral output, a display screen receiving the output of the projector and emitting a diffused output, and a color correction contrast enhancement filter positioned between the diffusing screen and a viewer. The filter differentially attenuates primary colors of the emission from the diffusing screen. The method includes projecting a light output from a light source having a fixed spectral output onto a diffusing screen, and attenuating primary colors of the emission from the diffusing screen with a light filter positioned adjacent to the diffusing screen.
REFERENCES:
patent: 4354739 (1982-10-01), Scanlon et al.
patent: 5037196 (1991-08-01), Takafuji et al.
patent: 5066099 (1991-11-01), Yoshida et al.
patent: 5193015 (1993-03-01), Shanks
patent: 5715083 (1998-02-01), Takayama
patent: 6428169 (2002-08-01), Deter et al.
patent: 6769774 (2004-08-01), McDowell
patent: 6847483 (2005-01-01), Lippey et al.
patent: 7040764 (2006-05-01), Przybyla et al.
patent: 7416306 (2008-08-01), Yamamoto et al.
patent: 2004/0233524 (2004-11-01), Lippey et al.
patent: 2005/0030480 (2005-02-01), Lippey et al.
patent: 2005/0141084 (2005-06-01), Waters
patent: 2006/0256292 (2006-11-01), Lippey et al.
patent: 2006/0279477 (2006-12-01), Allen et al.
patent: 2007/0081130 (2007-04-01), May et al.
patent: 2007/0085977 (2007-04-01), Fricke et al.
patent: 2007/0206280 (2007-09-01), May et al.
patent: 2007/0296875 (2007-12-01), Allen et al.
patent: 1152286 (2001-11-01), None
patent: WO96/21883 (1996-07-01), None
PCT International Search Report: PCT/US2005/024878, Applicant Reference No. H0006048.66722, Dec. 28, 2005, EP International Search Authority, 6 pages.
Dubin Matthew B.
Larson Brent D.
Dowling William C
Honeywell International , Inc.
Ingrassia Fisher & Lorenz P.C.
LandOfFree
Color correcting contrast enhancement of displays does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Color correcting contrast enhancement of displays, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Color correcting contrast enhancement of displays will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4082352