Light-emitting device that includes a plurality of...

Details Light-emitting device that includes a plurality of... Light-emitting device that includes a plurality of...

2011-06-14

2011-06-14

Patel, Nimeshkumar D (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S501000, C313S507000, C345S076000, C428S690000, C428S917000

Reexamination Certificate

active

07960912

ABSTRACT:
A light-emitting device includes a cathode, an anode, a first light-emitting layer that is disposed between the cathode and the anode and that emits light of a first color, a second light-emitting layer that is disposed between the first light-emitting layer and the cathode and that emits light of a second color different from the first color, and an intermediate layer that is disposed between and in contact with the first light-emitting layer and the second light-emitting layer and that functions to prevent energy transfer of excitons between the first light-emitting layer and the second light-emitting layer. The intermediate layer includes a first intermediate layer disposed in contact with the first light-emitting layer and mainly containing a first intermediate material and a second intermediate layer disposed in contact with the second light-emitting layer and mainly containing a second intermediate material different from the first intermediate material.

REFERENCES:
patent: 2001/0031509 (2001-10-01), Yamazaki
patent: 2005/0077817 (2005-04-01), Yamazaki et al.
patent: 2005/0118456 (2005-06-01), Hamada et al.
patent: 2005/0264174 (2005-12-01), Liao et al.
patent: 2006/0227079 (2006-10-01), Kashiwabara
patent: 2007/0241676 (2007-10-01), Park et al.
patent: 1786242 (2007-05-01), None
patent: A-2005-100921 (2005-04-01), None

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