Computer graphics processing and selective visual display system – Image superposition by optical means
Reexamination Certificate
2008-09-16
2008-09-16
Nguyen, Chanh (Department: 2629)
Computer graphics processing and selective visual display system
Image superposition by optical means
C353S081000
Reexamination Certificate
active
10521257
ABSTRACT:
A projection system having a projection display (20), at least one light source (10), and a sensor means for sensing and compensating for changes in the luminous flux emitted by the at least one light source (10) is described. The sensor means comprises in this case at least one sensor arrangement (30; 31, 32; 33, 34) for sensing components (M) of the light from the light source (10) that are directed into a region surrounding an entering face of an optical component (11) of the projection system. It has been found that there is a very good correlation between these components (M) of the light from the light source (10) and those other components (I) of the light that actually reach the projection display (20), which means that by controlling a power supply unit (10c) for the light source (10) and/or a driver unit (20a) driving the projection display (20) in a suitable manner it is possible very effectively to suppress fluctuations in brightness that occur as a result of, for example, unstable arc discharges.
REFERENCES:
patent: 5706061 (1998-01-01), Marshall et al.
patent: 6188427 (2001-02-01), Anderson et al.
patent: 2003/0020412 (2003-01-01), Luerkens et al.
patent: 2003/0179192 (2003-09-01), Allen et al.
patent: 2003/0227465 (2003-12-01), Morgan et al.
patent: 29914555 (1999-10-01), None
patent: 1280387 (2003-01-01), None
patent: 1280387 (2003-01-01), None
patent: WO 94/10675 (1994-05-01), None
patent: WO9410675 (1994-05-01), None
Shimizu “Scrolling Color LCOS for HDTV Rear Projection” in SID 01 Digest of Technical Papers, vol. XXXII, pp. 1072 to 1075, 2001.
Dewald, Penn, Davis “Sequential Color Recapture and Dynamic Filtering: A Method of Scrolling Color” in SID 01 Digest of Technical Papers, vol. XXXII, pp. 1076 to 1079, 2001.
Karimi Pegeman
Koninklijke Philips Electronics , N.V.
LandOfFree
Projection system featuring light source luminuous flux... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Projection system featuring light source luminuous flux..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projection system featuring light source luminuous flux... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3958538