Light-emitting apparatus, phosphor, and method of producing it

Details Light-emitting apparatus, phosphor, and method of producing it Light-emitting apparatus, phosphor, and method of producing it

2006-06-06

2006-06-06

Vannucci, James (Department: 2828)

Coherent light generators

Particular active media

Semiconductor

C372S108000, C435S006120, C313S512000

Reexamination Certificate

active

07058103

ABSTRACT:
A light-emitting apparatus composed of a light source that emits primary light and a phosphor that absorbs the primary light and emits secondary light offers high brightness, low power consumption, and a long lifetime while minimizing adverse effects on the environment. The phosphor is formed of a III–V group semiconductor in the form of fine-particle crystals each having a volume of 2 800 nm3or less. The light emitted from the fine-particle crystals depends on their volume, and therefore giving the fine-particle crystals a predetermined volume distribution makes it possible to adjust the wavelength range of the secondary light.

REFERENCES:
patent: 5455489 (1995-10-01), Bhargava
patent: 6337035 (2002-01-01), Itoh et al.
patent: 6791259 (2004-09-01), Stokes et al.
patent: 08-063119 (1996-03-01), None
patent: 11-340516 (1999-12-01), None
R.N. Bhargava et al, “Optical Properties of Manganese-Doped Nanocrystals of ZnS,”Physical Review Letters, vol. 72, No. 3, pp. 416-419, 1994.

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