Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2006-04-11
2006-04-11
Koslow, C. Melissa (Department: 1755)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C313S582000, C313S584000
Reexamination Certificate
active
07025902
ABSTRACT:
A green emitting lanthanum aluminate phosphors activated with manganese and alkali for plasma display panels (PDP) having an empirical formula:in-line-formulae description="In-line Formulae" end="lead"?La2−x−y−B22O36:Mnx.Ayin-line-formulae description="In-line Formulae" end="tail"?wherein: A=Li, Na or K; B=Al or Al+Ga; and 0.01≦x≦0.1 and 0.01≦y≦0.1 is provided. The phosphor has a band emission in green region, peaking at 515 nm when excited by 147 and 173 nm radiation from Xenon gas mixture, a uniform particle size distribution (0.01 to 10 microns), which is a size distribution appropriate for thin phosphor screens required for a variety of flat panel display and lamp applications. They exhibit high brightness, good color saturation, good stability and shorter persistence under VUV excitation.
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Koslow C. Melissa
Ohlandt, Greeley, Ruggiero & Perle LLP.
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