Patent Number: 7,088,040

Title: Light source using emitting particles to provide visible light

Abstract: Upconversion methods and devices that converts near-infrared light to the visible spectrum using a rare-earth-doped crystalline host for use as general and decorative lighting. The pseudo-monochromatic output of the processes can be specified by altering the amount and type of rare-earth material used and by selection of an appropriate host. Using rare-earth materials such as ytterbium-erbium or ytterbium-thulium can produce red, green and blue emissions, where the additive mixture of these colors yields a high-quality white light. The materials can be adjusted to achieve white light with any color temperature and high color-rendering index (CRI) for any general and decorative lighting applications both indoors and outdoors.

Inventors: Ducharme; Alfred D. (Orlando, FL), Bass; Michael (Orlando, FL), Rapaport; Alexandra (Orlando, FL)

Assignee: University of Central Florida Research Foundation, Inc.

International Classification: H01J 1/62 (20060101); H05B 33/00 (20060101)

Expiration Date: 8/08/02018