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

Volume

2

Issue

3

fYear

2006

Firstpage

307

Lastpage

311

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;

fLanguage

English

Journal_Title

Display Technology, Journal of

Publisher

ieee

ISSN

1551-319X

Type

jour

DOI

10.1109/JDT.2006.879183

Filename

1677557