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61.5: LED‐Based Light‐Recycling Light Sources for Projection Displays
Author(s) -
Beeson Karl,
Zimmerman Scott,
Livesay William,
Ross Richard,
Livesay Chad,
Livesay Ken
Publication year - 2006
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2433395
Subject(s) - projection (relational algebra) , light emitting diode , light pollution , computer graphics (images) , materials science , computer science , optics , optoelectronics , physics , algorithm
Abstract LED‐based light sources utilizing novel light‐recycling cavities have been developed that have small output etendue. A portion of the light emitted by the LED source is recycled back to the LEDs to enhance both the average brightness of the source and the brightness of the cavity output. Experimentally, we have achieved brightness enhancement factors of approximately 1.3x–2.0x.