Light emitting element, display device and electronic...

Details Light emitting element, display device and electronic... Light emitting element, display device and electronic...

2008-07-01

2008-07-01

Guharay, Karabii (Department: 2889)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S503000, C313S504000

Reexamination Certificate

active

07394196

ABSTRACT:
A light emitting element, including an anode, a cathode, a hole transport layer disposed between the anode and the cathode and in the side of the anode, and a light emitting layer disposed between the anode and the cathode and in the side of the cathode, wherein the hole transport layer includes, a first region disposed in the side of the anode and composed of a first organic polymer, and a second region disposed in the side of the light emitting layer and composed of a second organic polymer having a weight-average molecular weight different from the weight-average molecular weight of the first organic polymer.

REFERENCES:
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patent: 2005/0035710 (2005-02-01), Tanase et al.
patent: 2005/0253503 (2005-11-01), Stegamat et al.
patent: A-10-012377 (1998-01-01), None
patent: A-10-153967 (1998-06-01), None
patent: A-11-040358 (1999-02-01), None
C. W. Tang et al., “Organic electroluminescent diodes,” Appl. Phys Lett. 51 (12), Sep. 21, 1987, pp. 913-915.
J. C. Carter et al., “Operating stability of light-emitting polymer diodes based on poly (p-phenylene vinylene)”, Appl. Phys. Lett. 71 (1), Jul. 7, 1997, pp. 34.36.
G. Gustafsson et al., “Flexible light-emitting diodes made from soluble conducting polymers,” Nature, vol. 357, Jun. 11, 1992, pp. 477-479.

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