Plasma display unit, phosphor and process for producing...

Details Plasma display unit, phosphor and process for producing... Plasma display unit, phosphor and process for producing...

2007-04-24

2007-04-24

Koslow, C. Melissa (Department: 1755)

Compositions

Inorganic luminescent compositions

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

C313S582000, C313S584000

Reexamination Certificate

active

10485305

ABSTRACT:
A plasma display device exhibits suppressed luminance degradation of a phosphor, a suppressed change in chromaticity and improved discharge characteristics as a result of suppression of adsorption of water or hydrocarbon-containing gas on a surface of a blue phosphor. A blue phosphor layer used in the plasma display device is formed of a compound expressed by Ba1−XMgAl10O17:EuXor Ba1−x−ySryMgAl10O17:EuXand includes at least one element that is selected from Nb, Ta, Pr, P, As, Sb, Bi and Tm which substitutes for a part of its Al or Mg element.

REFERENCES:
patent: 5611959 (1997-03-01), Kijima et al.
patent: 6617788 (2003-09-01), Shiiki et al.
patent: 4-270782 (1992-09-01), None
patent: 2001-55567 (2001-02-01), None
“Phosphor Handbook”, p. 219-220, published from Ohm Co., Ltd. on Dec. 25, 1987 with partial translation.
N. Kijima, “Crystal Structure and Degradation Mechanism of Blue Phosphor”, Display and Imaging, 1999, vol. 7, pp. 225-234.
Hajime Yamamoto, “Phosphors For Next-Generation Display Devices”, Applied Physics, vol. 70, No. 3 (2001), pp. 309-312 with partial translation.
M. Shiiki et al., “Thermal degradation of PDP phosphors”, Technical Report of IEICE. EID99-94 (Jan. 2001), pp. 117-122.

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