Light emitting element, light emitting device, and lighting...

Details Light emitting element, light emitting device, and lighting... Light emitting element, light emitting device, and lighting...

2011-05-31

2011-05-31

Garrett, Dawn L (Department: 1786)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S917000, C313S504000, C313S506000

Reexamination Certificate

active

07951470

ABSTRACT:
According to the present invention, a light-emitting element, a light-emitting device, and a lighting system, each of which has a broad spectrum like sunlight and has high color rendering properties, can be obtained. One embodiment of the present invention has a light-emitting device which includes at least two kinds of luminescence center materials, and at least one kind of the luminescence center materials is a quinoxaline derivative represented by the following general formula (1):wherein R1 to R4 are individually hydrogen or an alkyl group having 4 carbon atoms (a straight-chain structure or a branch structure).

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