Minolta Company, Ltd.

Yoshihisa Terasaka

Hideaki Ueda

Keiichi Furukawa

Masami Yamada

Masahiko Matsuura

Eiichi Sano

Atsuto Hirai

Tomoo Izumi

Masahide Ueda

Hiroyuki Yamasaki

Akihito Hisamitsu

Takeshi Kitahora

Satoshi Yoshida

The purpose of the invention is to provide an organic electroluminescent element having stable luminescent characteristics with a low luminescence starting voltage and without non-luminescing black spots in the luminescing surface. The invention relates to a method of manufacturing an organic electroluminescent element and an organic electroluminescent element produced by said method, said method of manufacturing an organic electroluminescent element comprising a process for forming a positive electrode substrate by dry etching a transparent electrode in a vacuum, a process for dry washing said positive electrode substrate in a continuous vacuum without exposure to air, a process for forming an organic layer incorporating an organic luminescing layer on said positive electrode substrate, and a process for forming a negative electrode on said organic layer.

Organic electroluminescent element and method of manufacturing same

An organic electro-luminescence display element comprising at least a positive electrode, an organic luminescent film and a negative electrode, wherein the positive electrode is formed of an electrically conductive film having transparency, the negative electrode is formed of a metal film containing metal having a low work function, and the negative electrode is connected to a power supply lead portion made of a transparent and conductive film.

Organic electro-luminescence display element, finder screen display device, finder and optical device

An organic electroluminescent display element has at least a positive electrode, an organic luminescent film, an electron injection layer and a negative electrode. Each of the positive and negative electrodes is formed of a transparent conductive film, the electron injection layer is formed of a thin transparent film made of a halogenide of an alkali metal or an alkaline earth metal, or an organic metal complex containing an alkali metal or an alkaline earth metal as a metal, and the organic metal complex is at least one complex selected from the group consisting of acetylacetonate complexes, &agr;-nitroso-&bgr;-naphthol complexes, salicylaldoxime complexes, cupferron complexes, benzoinoxime complexes, bipyridine complexes, phenanthroline complexes, crown complexes, proline complexes and benzoylacetone complexes.

Organic electroluminescent display element, finder screen display device, finder and optical device

The object of the invention is to provide an organic electroluminescent element which reduces the luminescence starting voltage, increases the luminescence brightness, and has excellent stability with repeated use. The organic electroluminescent element includes at least a positive electrode, a luminescing layer and a negative electrode, which includes a compound layer of magnesium and a metal having a higher work function than magnesium. The exterior side of the compound layer has a higher percentage of the metal than magnesium and the interior side of the compound layer has a higher percentage of magnesium than the metal.

Organic electroluminescent element

The present invention relates to an organic eletroluminescent element comprising an anode, an organic luminous layer, an electron-injection layer and a cathode, in which the electron-injection layer comprises a metal oxide or a metal halide, and a material different from the metal halide or metal oxide.

An organic electroluminescent element having excellent durability with increased luminescence intensity, low luminescence starting voltage, and excellent stability with repeated use. An organic electroluminescent element having at least a positive electrode, hole-injection layer, hole-transporting layer, luminescent layer, and negative electrode, wherein the positive electrode has an ionization potential of 5.18-5.35 eV, the hole-injection layer has an ionization potential of 4.80-5.18 eV, and the hole-transporting layer has an ionization potential of 5.20-5.70 eV.

The purpose of the present invention is to provide an organic electroluminescent element having uniform surface luminescence, large luminescence intensity, and excellent stability over repeated use. The present invention provides a method of manufacturing an organic electroluminescent element using a positive electrode irradiated by excimer light when manufacturing an organic electroluminescent element comprising at least a substrate on which is sequentially formed a positive electrode, organic layer including an organic luminescent layer, and negative electrode, and an organic electroluminescent element manufactured by said method.

Organic electroluminescent element having an excimer light irradiated

An image forming apparatus includes a first developing device, accommodating a first kind of toner without an offset preventing agent, a second developing device accommodating a second kind of toner containing an offset preventing agent, and a roller fixing device having a supply portion for supplying an offset preventing agent. The image forming apparatus changes the amount of the offset preventing agent to be supplied to the fixing roller between the case of fixing a copy image formed with the first kind of toner and the case of fixing a copy image formed with the second kind of toner.

Image forming apparatus provided with mold releasing agent coating

An image forming apparatus for forming an image onto a sheet includes a sheet supporting member; a charger which is positioned in a vicinity of the sheet supporting member; and a device for controlling the charger so that the charger charges a specific portion of the sheet supporting member corresponding to a leading edge portion of the sheet to an electrostatic potential higher than that of a remaining portion of the sheet supporting member. A method of adhering a sheet to a sheet supporting member during an image forming process includes charging a specific portion of the sheet supporting member corresponding to a leading edge portion of the sheet to a first electrostatic potential; charging a remaining portion of the sheet supporting member to a second electrostatic potential that is lower than the first electrostatic potential; and delivering the sheet to the sheet supporting member so that a leading edge portion of the sheet is aligned with the specific portion of the sheet supporting member.

Image forming apparatus including an endless transfer member

The present invention relates to a method of producing a plurality sets of prints from a plural-page original in an image forming apparatus having an endless transfer member onto which images are transferred from an image retaining member. The endless transfer member is operable to support a predetermined number (X) of images during one cyclic movement thereof. In this method, a first printing operation is executed in which the predetermined number (X) of images of a first page of the original are formed on the endless transfer member during one cyclic movement thereof when a desired number (Y) of sets of prints exceeds said predetermined number (X). Second, the first printing operation is repeated until a remaining number (M) of image(s) of the first page becomes less than said predetermined number (X). Third, a second printing operation is executed in which the remaining number (M) of image(s) of the first page and a calculated number (X-M) of image(s) of a second page of the original are formed on said endless transfer member during one cyclic movement thereof after the remaining number (M) of image(s) of the first page becomes less than the predetermined number (X).

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Suita, Japan

Yoshihisa Terasaka