Electric lamp and discharge devices – With gas or vapor – Three or more electrode discharge device
Reexamination Certificate
2007-01-09
2007-01-09
Patel, Nimeshkumar D. (Department: 2879)
Electric lamp and discharge devices
With gas or vapor
Three or more electrode discharge device
C313S483000, C313S484000, C313S485000, C313S486000, C313S487000, C252S30140R, C252S30140P, C252S30160R, C252S30160P, C427S066000
Reexamination Certificate
active
10489326
ABSTRACT:
A plasma display device includes a blue phosphor composed of a compound represented by Me3MgSi2O8:Eu (where, Me is at least calcium (Ca), strontium (Sr), or barium (Ba)). Concentration of bivalent Eu ions is 45 to 95% and concentration of trivalent Eu ions is 5 to 55%, of the europium (Eu) atoms contained in the blue phosphor layer. The plasma display device has less luminance degradation in a panel manufacturing process, high luminance, and long lifetime.
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M. Shiki et al., “Thermal degradation of PDP phosphors”, Technical Report of IEICE. EID99-94 (Jan. 2000), pp. 117-122.
Aoki Masaki
Hibino Junichi
Kawamura Hiroyuki
Otani Mitsuhiro
Setoguchi Hiroshi
Matsushita Electric - Industrial Co., Ltd.
Olander Gabriel
Patel Nimeshkumar D.
Wenderoth , Lind & Ponack, L.L.P.
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