Phosphor and fluorescent display device

Details Phosphor and fluorescent display device Phosphor and fluorescent display device

2006-03-28

2008-08-19

Koslow, C. Melissa (Department: 1793)

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

C313S467000, C313S486000

Reexamination Certificate

active

07413680

ABSTRACT:
A phosphor including a matrix in the form of titanate expressed by Ca1-xSrxTiO3(0<x≦0.5), and Pr (praseodymium) and Li (lithium) that are added to the matrix. The phosphor may further include Zn (zinc) that is added as well as the Pr and Li to the matrix. Also disposed is a process of manufacturing the phosphor, including: a mixing step of mixing a matrix material, a first additive material including Pr, and a second additive material including Li, so as to obtain a mixture; and a firing step of firing the obtained mixture at a firing temperature of from 1050 to 1250° C.

REFERENCES:
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patent: 6669868 (2003-12-01), Yu et al.
patent: 6673269 (2004-01-01), Suzuki et al.
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patent: A 2003-41246 (2003-02-01), None
patent: A 2004-238549 (2004-08-01), None
patent: A 2005-8674 (2005-01-01), None
Kang et al., “P-102: The Influence of Li Addition on Cathodoluminescence for CaTiO3:Pr3+,” Europdisplay, pp. 777-779, 2002.
Diallo et al., “Improvement of the optical performances of Pr3+in CaTiO3,” Journal of Alloys and Compounds, 323-324, pp. 218-222, 2001.
Vecht et al., “New electron excited light emitting materials,” J. Vac. Sci. Technol. B 12(2), pp. 781-784, 1994.

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