Organic EL display element

Details Organic EL display element Organic EL display element

2006-04-04

2006-04-04

Santiago, Mariceli (Department: 2879)

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

C313S503000, C313S509000

Reexamination Certificate

active

07023132

ABSTRACT:
In conventional organic EL display elements of this type, unevenness of brightness surely occurs at high temperatures. These conventional organic elements cannot be used in, for example, display devices to be mounted on vehicles, giving rise to the problem of inferior generalities. An organic EL display element1according to the present invention comprises a stress relaxation layer on a cathode after the cathode is formed, the stress relaxation layer being a film which exhibits tensile stress when the film stress of the cathode is compressive stress or exhibits compressive stress when the film stress of the cathode is tensile stress. This structure allows the organic EL display element to prevent the occurrence of unevenness of brightness caused by the film stress of the cathode to solve the problem and makes it possible to give generalities to organic EL display elements of this type.

REFERENCES:
patent: 5343050 (1994-08-01), Egusa et al.
patent: 2003/0011301 (2003-01-01), Sasaoka et al.
patent: 11339969 (1999-12-01), None
patent: 2000133462 (2000-05-01), None

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