Red phosphor and white light illumination device utilizing...

Details Red phosphor and white light illumination device utilizing... Red phosphor and white light illumination device utilizing...

2007-07-05

2009-12-15

Patel, Vip (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C252S30140F

Reexamination Certificate

active

07633219

ABSTRACT:
The invention provides a red phosphor composed of M(Eu1-x-yLaxBiy)4Si3O13, wherein M is Ca, Sr, Ba, or combinations thereof, 0<x<1, and 0<y<1. Under excitation of blue light or ultraviolet light, the red phosphor emits red light having a major emission peak of about 613 nm. The red phosphor of the invention may be collocated with green and blue phosphors to provide a white light illumination device.

REFERENCES:
patent: 6501100 (2002-12-01), Srivastava et al.
patent: 6616862 (2003-09-01), Srivastava et al.
K. Yamada et al., J. Ilium. Engng. Inst. Jpn. vol. 88 No. 5 2004 pp. 297-303.

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