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High-brightness white-light source based on up-conversion phosphors

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5 Author(s)
J. Milliez ; Coll. of Opt. & Photonics/CREOL, Univ. of Central Florida, Orlando, FL, USA ; A. Rapaport ; M. Bass ; A. Cassanho
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We report the implementation of a new, high brightness, high efficiency white-light source based on up-conversion phosphors. Up-conversion materials absorb near infrared light and re-emit in red, green, and blue. It is possible to combine these colors to create a white-light source. Such a source has the same appealing characteristics as those reported for up-conversion displays: very high brightness operation without damage to the emitters, long lifetimes, and efficiencies comparable to those of existing technologies. In addition, they offer simplicity of fabrication and a variety of operating modes. Here we demonstrate a 7-lm/W D65 white light emitter yielding 2 kcd/m 2 on a simple diffuser

Published in:

Journal of Display Technology  (Volume:2 ,  Issue: 3 )