Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2005-08-30
2005-08-30
Patel, Vip (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S498000, C313S503000
Reexamination Certificate
active
06936962
ABSTRACT:
A light-emitting device including a plurality of emission layers, which has improved luminous efficiency and improved reliability (or device lifetime), is provided. The light-emitting device includes a first emission layer formed on a substrate, and a second emission layer formed on the first emission layer to provide a laminated structure, for emitting light having a different wavelength from that of light emitted by the first emission layer. At least one of the first emission layer and the second emission layer includes a host material, a luminescent first dopant material and a non-luminescent second dopant material.
REFERENCES:
patent: 2000-164362 (2000-06-01), None
patent: 3287344 (2002-03-01), None
patent: 2002-108285 (2002-04-01), None
patent: 2002-216971 (2002-08-01), None
Reference No. NPA 1030048, Dispatch No. 149482, Dispatch Date Apr. 22, 2005, Patent Application No. 2003-144278, Drafting Date Apr. 20, 2005, Examiner of JPO: Toshimitsu Satomura 9314 2V00, Title of Invention:Light Emitting Device, Applicant:Sanyo Electric Co., Ltd.
Hamada Yuji
Kanno Hiroshi
Nishimura Kazuki
McDermott Will & Emery LLP
Patel Vip
Sanyo Electric Co,. Ltd.
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