Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Reexamination Certificate
2005-09-14
2011-11-01
Hines, Anne (Department: 2879)
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
C313S506000, C428S690000, C428S917000
Reexamination Certificate
active
08049407
ABSTRACT:
The present invention provides an organic electroluminescent element that includes a pair of electrodes and a plurality of organic compound layers being disposed between the pair of electrodes. The organic compound layers include a luminescent layer containing a blue phosphorescent luminescent material and a host material having the lowest excited triplet energy (T1) of 272 kJ/mol (65 kcal/mol) or more, and hole transport layers. One of the hole transport layers is a layer adjacent to the luminescent layer, and when the ionization potentials of the luminescent layer, the hole transport layer adjacent to the luminescent layer, and another of the hole transport layers, respectively, designated to Ip1, Ip2and Ip3, the relationship Ip1>Ip2>Ip3is satisfied.
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Igarashi et al. , JP 2004-221063, Aug. 2004, machine translation.
Japanese Office Action (Notice of Reasons for Rejection) dated Jul. 6, 2010 for Application No. 2005-267288.
JPO Notice of Reasons for Rejection, Appl. No. 2005-267288, May 31, 2011, pp. 1-3 (w/ English translation).
Igarashi Tatsuya
Ise Toshihiro
Kitamura Yoshitaka
Tsukahara Jiro
Birch & Stewart Kolasch & Birch, LLP
Fujifilm Corporation
Green Tracie
Hines Anne
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