Electric lamp and discharge devices – With luminescent solid or liquid material – With gaseous discharge medium
Reexamination Certificate
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
07394191
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.
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Inoue Ryo
Komatsu Masaaki
Shiiki Masatoshi
A. Marquez, Esq. Juan Carlos
Fischer, Esq. Stanley P.
Hitachi Displays Ltd.
Reed Smith LLP
Roy Sikha
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