Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2011-03-01
2011-03-01
Chu, Yong (Department: 1626)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C548S440000
Reexamination Certificate
active
07898171
ABSTRACT:
The present invention provides a novel substance having an excellent color purity of blue, a light-emitting element and a light-emitting device using the novel substance. A stilbene derivative has a structure shown by the general formula (1). In the general formula (1), R1is hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 25 carbon atoms. R2is an alkyl group having 1 to 4 carbon atoms or an aryl group having 6 to 25 carbon atoms. Each of R3to R5is hydrogen or an alkyl group having 1 to 4 carbon atoms. Ar1is an aryl group having 6 to 25 carbon atoms.
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Egawa Masakazu
Kawakami Sachiko
Nakashima Harue
Nomura Ryoji
Ohsawa Nobuharu
Chu Yong
Husch & Blackwell LLP
Semiconductor Energy Laboratory Co,. Ltd.
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