Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2006-12-12
2006-12-12
Koslow, C. Melissa (Department: 1755)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C313S582000, C313S584000, C313S486000
Reexamination Certificate
active
07147802
ABSTRACT:
The present invention relates to a plasma display device apt to increase luminance of a phosphor layer and prevent degradation of a discharge characteristic, and to a phosphor used for the device. This plasma display device has a green phosphor having a crystal structure of Zn2SiO4:Mn, and a monovalent oxide is substituted for part of the green phosphor. The monovalent oxide is one or more of lithium oxide (Li2O), sodium oxide (Na2O), potassium oxide (K2O), cesium oxide (Cs2O), rubidium oxide (Rb2O), copper oxide (Cu2O), and silver oxide (Ag2O). This structure allows reduction of oxygen defects occurring in the green phosphor, suppression of the luminance decrease of the green phosphor, and improvement of a discharge characteristic.
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Phosphor Handbook, p. 219-220, published from Ohm Co., Ltd., Dec. 25, 1987 with a partial translation.
M. Shiiki et al., “Thermal degradation of PDP phosphors”, Technical Report of IEICE. EID99-94, Jan. 2000.
Aoki Masaki
Hibino Junichi
Kawamura Hiroyuki
Otani Mitsuhiro
Sugimoto Kazuhiko
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