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Light emitting device having peripheral emissive region

United States Patent

May 28, 2013
View the Complete Patent at the US Patent & Trademark Office
Light emitting devices are provided that include one or more OLEDs disposed only on a peripheral region of the substrate. An OLED may be disposed only on a peripheral region of a substantially transparent substrate and configured to emit light into the substrate. Another surface of the substrate may be roughened or include other features to outcouple light from the substrate. The edges of the substrate may be beveled and/or reflective. The area of the OLED(s) may be relatively small compared to the substrate surface area through which light is emitted from the device. One or more OLEDs also or alternatively may be disposed on an edge of the substrate about perpendicular to the surface of the substrate through which light is emitted, such that they emit light into the substrate. A mode expanding region may be included between each such OLED and the substrate.
Forrest; Stephen R. (Ann Arbor, MI)
The Regents of the University of Michigan (Ann Arbor, MI)
13/ 019,753
February 2, 2011
This invention was made with government support under Contract No. SBIR DE-FG02-08ER85082, awarded by the Department of Energy. The government has certain rights in the invention.