Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 31, 2012
Patent Application Number
12945080
Date Filed
November 12, 2010
Patent Citations Received
Patent Primary Examiner
Patent abstract
A display system includes a projection screen and a projector. The projection screen includes a retarder plate between a polarizer and a transparent screen. The projector projects an image through the polarizer and the retarder plate onto the transparent screen. The image is visible from a first side of the transparent screen but invisible from a second side of the transparent screen because any light passing twice through the retarder plate is blocked by the polarizer.
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