Rear projection screen with enhanced contrast
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United States of America Patent
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Sep 10, 2002
Issued Date -
N/A
app pub date -
Mar 23, 1999
filing date -
Mar 30, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Projection screen assemblies include one or more birefringent retarding layers and one or more polarizing layers. The retarding and polarizing layers reduce the unwanted reflection of ambient and image light. One embodiment of a screen assembly includes a dispersing layer having an input side to receive light from a light source and a first retarding layer disposed to alter the polarization of the light transmitted by the dispersing film. A first polarizer substantially transmits light received from the first retarding layer in a first polarization state and absorbs light received from the first retarding layer in a second polarization state orthogonal to the first polarization state.
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