Phosphor for use in white semiconductor light sources and a...

Details Phosphor for use in white semiconductor light sources and a... Phosphor for use in white semiconductor light sources and a...

2007-02-27

2007-02-27

Nguyen, Dung T. (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Particular illumination

C349S069000, C349S070000, C313S503000, C362S231000, C362S800000

Reexamination Certificate

active

10425860

ABSTRACT:
A light source having an LED that is covered by a layer containing a phosphor is disclosed. The LED emits light in a first wavelength band. The phosphor containing layer includes particles that contain a phosphor having the formula Dy3A5O12, where A is at least one of the elements aluminum, gallium, indium, magnesium or silicon. The layer is positioned to receive a portion of the light from the LED and convert the light to light in a second wavelength band. The phosphor may be doped with Ce. Eu, and Tb, or a combination thereof.

REFERENCES:
patent: 6252254 (2001-06-01), Soules et al.
patent: 6596195 (2003-07-01), Srivastava et al.
patent: 6720584 (2004-04-01), Hata et al.
patent: 2003/0078156 (2003-04-01), Lowden et al.

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