Yellow ZnS-based phosphor, process of preparing the same and...

Details Yellow ZnS-based phosphor, process of preparing the same and... Yellow ZnS-based phosphor, process of preparing the same and...

2006-06-27

2006-06-27

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

Zinc or cadmium containing

C313S582000, C313S584000, C313S467000, C313S486000

Reexamination Certificate

active

07067073

ABSTRACT:
A yellow ZnS-based phosphor which has improved color coordinates and luminance for use in intermediate- and low-voltage display devices using improved activators and coactivators is a (ZnS: Mn, Cu) phosphor which has color coordinates (x, y) shifting to a yellow emission as the amount copper added as an activator is increased. The phosphor has enhanced luminance by adding a trivalent metal as a coactivator. Therefore, the (ZnS: Mn, Cu) phosphor can be advantageously utilized for various display applications including vacuum fluorescent displays (VFDs) and field emission displays (FEDs).

REFERENCES:
patent: 4377769 (1983-03-01), Beatty et al.
patent: 6682664 (2004-01-01), Chen et al.
patent: 6702959 (2004-03-01), Fan et al.
patent: 2-20590 (1990-01-01), None
patent: 2000-17450 (2000-03-01), None
U.S. Appl. No. 10/368,385, filed Feb. 20, 2003, Lee et al., Samsung SDI Co., Ltd.

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