Abstract
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<sup>2</sup> on a simple diffuser.
© 2006 IEEE
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