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Increased Efficiency LEDIn an LED a large portion of the light produced is lost due to total internal reflection at the air-semiconductor interface. A reverse taper of the semiconductor is used to change the angle at which light strikes the interface so that a greater portion of the light is transmitted.
Document ID
19980038163
Acquisition Source
Langley Research Center
Document Type
Other - Patent
Authors
Egalon, Claudio O. (NASA Langley Research Center Hampton, VA United States)
Rogowski, Robert S. (NASA Langley Research Center Hampton, VA United States)
Date Acquired
August 18, 2013
Publication Date
January 6, 1998
Subject Category
Electronics And Electrical Engineering
Report/Patent Number
Patent Number: NASA-Case-LAR-15184-1-SB
Patent Application Number: US-Patent-Appl-SN-644654
Patent Number: US-Patent-5,705,834
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-Case-LAR-15184-1-SB|US-Patent-5,705,834
Patent Application
US-Patent-Appl-SN-644654

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