Image display device having a long-life phosphor layer

Details Image display device having a long-life phosphor layer Image display device having a long-life phosphor layer

2008-07-01

2008-07-01

Roy, Sikha (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

With gaseous discharge medium

C313S495000, C313S467000, C252S30140R, C252S30160S

Reexamination Certificate

active

10872591

ABSTRACT:
The disclosed method can improve the luminescence life of an image display device. By using a blue luminescent phosphor having the phosphor component ZnS:M, N (where M is one or more elements selected from Cu, Ag, and Au, and N is one or more elements selected from Al, Ga, In, and Cl); wherein a shoulder is observed at around 400 nm (3.10 eV) of a cathode-luminescence spectrum of a field-emission display. A phosphor of a field-emission display of the present invention has improved characteristics against deterioration by electron-beam irradiation and an excellent luminescence maintenance factor, therefore, the luminescence life characteristics of a display are improved.

REFERENCES:
patent: 6812636 (2004-11-01), Porter et al.
patent: 6876142 (2005-04-01), Komatsu et al.
patent: 2003/0102797 (2003-06-01), Kajiwara
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patent: 2002265942 (2002-09-01), None
K. Kajiwara, “Cross-Sectional Transmission Electron Microscopy Investigation of the Dead Layer of ZnS:AgAl Phosphors in Field Emission Displays”, J. Vac. Sci. Technol. (Jul./Aug. 2001), vol. 19, No. 4, pp. 1083-1089.
Swart et al., “Degradation of Zinc Sulfide Phosphors Under Electron Bombardment”, J. Vac. Sci. Technol. (May/Jun. 1996), vol. 14, No. 3, pp. 1697-1703.

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