Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Reexamination Certificate
2008-06-18
2010-10-12
Koslow, C. Melissa (Department: 1793)
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
C252S30140R, C252S30160R, C257S098000, C313S503000
Reexamination Certificate
active
07811472
ABSTRACT:
A light-emitting device includes a phosphor layer containing a phosphor and a light-emitting element. The light-emitting element has an emission peak at 360 nm to less than 500 nm, and the phosphor is excited with light emitted by the light-emitting element. The light emitting device contains light-emitting component light emitted by the phosphor as output light. The phosphor contains a nitride phosphor or an oxynitride phosphor and alkaline-earth metal orthosilicate phosphor that are activated with Eu2+. The nitride phosphor or the oxynitride phosphor has an emission peak at 600 nm to less than 660 nm, and the alkaline-earth metal orthosilicate phosphor has the emission peak at 500 nm to less than 600 nm. An internal quantum efficiency of each phosphor is at least 80% under the excitation with light emitted by the light-emitting element.
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Hamre Schumann Mueller & Larson P.C.
Koslow C. Melissa
Panasonic Corporation
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