Optics: image projectors – Light shield – mask – hood – or diaphragm
Reexamination Certificate
2006-05-23
2006-05-23
Koval, Melissa Jan (Department: 2851)
Optics: image projectors
Light shield, mask, hood, or diaphragm
C353S020000, C353S031000, C353S084000, C353S098000, C353S102000, C349S005000, C349S008000, C349S009000, C348S742000, C348S743000, C348S744000, C313S113000, C313S498000, C362S247000, C362S545000
Reexamination Certificate
active
07048385
ABSTRACT:
A projection display system has at least one light-recycling illumination system, a color scroller and an imaging light modulator. The light-recycling illumination system includes a light source that is enclosed within a light-recycling envelope. The light source is a light-emitting diode that emits light, and a fraction of that light will exit the light-recycling envelope through an aperture. The light-recycling envelope recycles a portion of the light emitted by the light source back to the light source in order to enhance the luminance of the light exiting the aperture. The fraction of the light that exits the aperture is partially collimated and is directed to a color scrolling means. The color scroller scans the partially collimated light across the face of the imaging light modulator. The imaging light modulator spatially modulates the scrolled beam of light to form an image.
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Ryer, Alex, Light Measurement Handbook, 1997, p. 32, International Light, Inc., Newburyport, Massachusetts, USA.
Beeson Karl W.
Zimmerman Scott M.
Goldeneye, Inc.
Koval Melissa Jan
Propp, Esq. William
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