Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2006-01-23
2010-06-15
Tarazano, D. Lawrence (Department: 1794)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000, C257S040000, C257SE51051, C428S690000, C428S917000, C564S308000
Reexamination Certificate
active
07737628
ABSTRACT:
An aromatic amine derivative with a specified structure whose benzene ring is bonded with a cycloalkyl group. An organic electroluminescence device which comprises at least one organic thin film layer comprising a light emitting layer sandwiched between a pair of electrode consisting of an anode and a cathode, wherein at least one of the organic thin film layer comprises the aromatic amine derivative singly or in combination. The organic EL device employing the aromatic amine derivative reveals practically sufficient luminance even under low applied voltage, exhibits an enhanced efficiency of light emission, and is resistant to degrade even after a long time usage demonstrating a prolonged lifetime.
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Crouse Brett A
Idemitsu Kosan Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Tarazano D. Lawrence
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