Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2004-04-26
2009-10-06
Tarazano, D. Lawrence (Department: 1794)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000, C428S690000, C428S917000, C564S308000, C257S040000, C257SE51047
Reexamination Certificate
active
07598667
ABSTRACT:
Arylamine compounds having at least one spiro bond are provided to the layers of an electroluminescent device. The compounds act as hole transporting and luminescent host materials for both fluorescent and phosphorescent emission. Electroluminescent devices employing the arylamine compounds exhibit excellent luminous efficiency, heat resistance and device life.
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Hosokawa Chishio
Inoue Tetsuya
Kawamura Hisayuki
Crouse Brett A
Idemitsu Kosan Co. Ltd.
Steptoe & Johnson LLP
Tarazano D. Lawrence
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