Tdk Corporation

Akira Ebisawa

Osamu Onitsuka

Hiroyuki Endo

Masahiro Shinkai

Emiko Kambe

Tetsushi Inoue

Satoshi Shirai

Kouji Yasukawa

Michio Arai

Hiroshi Yamamoto

Toshio Hayakawa

Mitsunari Suzuki

Mutsuko Nakano

Masayuki Kawashima

Taku Someya

Junichi Shimamura

Hideo Kato

Organic EL elements provided with a substrate, a first electrode layerand a second electrode layersituated in a mutually opposing manner on one side of the substrate, and a luminescent layersituated between the electrode layers, wherein one of the first electrode layerand the second electrode layeris a hole injection electrode layer and the other is an electron injection electrode layer, and there is formed in the luminescent layera modified sectionwhich contains an organic polymer compound different from the organic compound composing the luminescent layer, in bias toward the electron injection electrode layer.

Organic EL elements and process for fabrication thereof

An organic EL element of the present invention comprises a substrate, an electrode layer, an organic layer, and an electrode layer, whereas the organic layercontains a vinyl polymer obtained by polymerizing a polymerizable monomer containing a compound represented by formula (1) or (2): wherein each of Land Lis a bivalent group; each of X, X, X, X, X, and Xis alkyl group or the like; each of a and e is 0 or 1; each of b, f, g, and h is an integer of 0 to 3; c is an integer of 0 to 2; and d is an integer of 0 to 4.

Organic EL element and organic EL display

A vinyl polymer having a 9,10-substituted anthracene structure which is a stable structure with a high solid quantum efficiency is obtained from a vinyl monomer having a group derived from the structure of formula (1) wherein nis an integer of 1 to 3, each of X, X, Xand Xis a substituent group, kand kare integers of 0 to 5, and kand kare integers of 0 to 4. An organic EL device comprising an organic layer containing the vinyl polymer becomes a molecule dispersed type organic EL device featuring a high efficiency and a long life. 

Organic electroluminescent device

An organic EL structure is received in a gas-tight casing to construct an organic EL display assembly. The organic EL structure includes a hole injecting electrode, an electron injecting electrode, and at least one organic layer disposed between the electrodes. A desiccant selected from calcium hydride, strontium hydride and a mixture thereof is disposed in the casing out of contact with the organic EL structure. This EL display assembly substantially eliminates the influence of moisture and has a long lifetime.

Organic EL display assembly

An organic EL device comprises a substrate, an organic EL structure stacked on the substrate, a sealing plate located on the organic EL structure with a predetermined space therebetween, and a sealing adhesive agent for fixing the sealing plate on the substrate and thereby closing up the organic EL structure. The sealing adhesive agent is a photo-curing type adhesive agent which, upon photo-curing, generates gases under heating conditions of 85&deg; C. and 60 minutes. In these gases, the total amount of a low-molecular straight-chain aliphatic hydrocarbon which may have a substituent, an aromatic hydrocarbon which may have a substituent, an alicyclic hydrocarbon which may have a substituent, and a heterocyclic compound and a siloxane which may have a substituent is 200 &mgr;g/g or lower calculated as benzene. The organic EL device of the invention is reduced as much as possible in terms of a deterioration with time, and can maintain its initial performance over a long period of time, so that it can have an ever longer service life.

An organic EL structure is formed on a substrate,and a sealing sheet is located at a position above the substrate, where the sealing sheet comes in no contact with the organic EL structure. A height from the surface of the substrate, on which an organic EL device structure in a film form is provided, to a junction of the sealing sheet with the substrate has a value larger than the value obtained by adding the size of an irregularity or undulation of the sealing sheet to the height of the organic EL structure.

In an organic EL display device, an organic EL multilayer structure is disposed in a gastight space defined between a substrate and a shield member and filled with an inert gas. The organic EL multilayer structure includes organic materials having a Tg of at most 140.degree. C. The shield member is a continuous member free of a filling port. The shield member is joined to the substrate with a UV-curing epoxy resin adhesive of the cationic curing type. The inert gas in the space has a water content of at most 100 ppm. The steps of forming layers on substrates to form organic EL multilayer structures and the steps of adhesively joining shield members to the substrates are carried out in inert gas atmospheres.

Organic electroluminescent display device, and method and system for

A color conversion material comprises a high-molecular material having a light transmittance of at least 90% in a visible light region, a fluorescent dye contained therein, and a fluorescent pigment particle dispersed therein. The wavelength of unconverted light incident on the color conversion material is up to 520 nm, the light emission maximum wavelength of the conversion material is at least 580 nm upon incident light conversion, and the conversion efficiency of at least 10% is obtained.

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Tokyo, Japan

Akira Ebisawa