Reflective projection screen and projection system
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United States of America Patent
Stats
-
Apr 30, 2002
Grant Date -
N/A
app pub date -
Mar 19, 1999
filing date -
Mar 19, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Reflective front projection screens capable of projecting an image with enhanced contrast and a wide viewing angle in the presence of relatively high levels of ambient light are disclosed along with projection systems using the screens. The projection screens include a reflective polarizing element in combination with a diffusing element and/or glare suppressing element. The reflective polarizing element transmits light of one polarization state and reflects light of a different polarization state. The reflective polarizing element may be diffusely reflective or specularly reflective and the optical properties of the diffusing element and/or glare suppressing element may be selected based on the optical properties of the reflective polarizing element to further enhance image brightness and contrast. The projection systems preferably project an image using light of the polarization state that is reflected by the reflective polarizing element in the screen to further enhance brightness and contrast of the image.
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Cited Art Landscape
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