Light emitting element with light-emitting material in...

Details Light emitting element with light-emitting material in... Light emitting element with light-emitting material in...

2005-01-13

2008-11-18

Guharay, Karabi (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S498000, C313S512000

Reexamination Certificate

active

07453204

ABSTRACT:
The present invention provides a light emitting element comprising a pair of electrodes and one or more organic compound layers including a luminescent layer disposed between the pair of electrodes. In this structure, the luminescent layer includes at least one charge transport material and at least one light emitting material, and comprises a laminated structure having two or more laminates including a plurality of layers including the light emitting material in different concentrations.

REFERENCES:
patent: 5935720 (1999-08-01), Chen et al.
patent: 2003/0068525 (2003-04-01), Bellmann et al.
patent: 10-308281 (1998-11-01), None
patent: 2003-187977 (2003-07-01), None
patent: WO-01/08230 (2001-02-01), None

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