Title :
High-brightness white-light source based on up-conversion phosphors
Author :
Milliez, Janet ; Rapaport, Alexandra ; Bass, Michael ; Cassanho, Arlete ; Jenssen, Hans P.
Author_Institution :
Coll. of Opt. & Photonics/CREOL, Univ. of Central Florida, Orlando, FL
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 2 on a simple diffuser
Keywords :
absorbing media; brightness; display devices; infrared sources; light absorption; high-brightness white-light source; near infrared light absorption; up-conversion displays; up-conversion materials; up-conversion phosphors; Brightness; Diode lasers; Displays; Frequency; Light sources; Optical materials; Optical pumping; Optical scattering; Phosphors; Stimulated emission; Displays; fluorescence spectroscopy; light sources; luminescence; optical frequency up-conversion (UC); optical scattering; rare earth (RE) compounds;
Journal_Title :
Display Technology, Journal of
DOI :
10.1109/JDT.2006.879183
