Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kevin G. Donahue0
Date of Patent
January 24, 2012
Patent Application Number
12419284
Date Filed
April 6, 2009
Patent Citations Received
Patent Primary Examiner
Patent abstract
A one-way see-through illumination system is constructed from a light guide panel, a front-illuminable image film, and a light injector. The light injector injects light into the light guide panel at a suitable angle for total internal reflection of the injected light at the surfaces of the light guide panel. The image film includes a half-toned front-illuminable image pattern that extracts light from the light guide panel. When active, light from the light guide panel front illuminates the image pattern for viewing by a front-side view, while a back-side viewer can see through the image pattern.
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