Optics: image projectors – Color filter
Reexamination Certificate
2006-05-09
2006-05-09
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Color filter
C353S122000, C359S443000
Reexamination Certificate
active
07040764
ABSTRACT:
Ambient light that is modified for use in a projection system is described. In an embodiment of the present invention, a projection system includes a projection screen and an ambient light source. The projection screen reflects and/or emits one or more ranges of wavelengths of visible light. The projection screen also absorbs visible wavelengths of light in at least one other range that is not included in the one or more ranges. The ambient light source outputs visible wavelengths of light in the at least one other range. The at least one other range of wavelengths have a greater intensity as weighted by the sensitivity of a human eye than that of the wavelengths of light output by the ambient light source in the one or more ranges.
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Piehl Arthur
Przybyla James R.
Hewlett--Packard Development Company, L.P.
Koval Melissa Jan
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