Joled Inc.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Sumitomo Chemical Company, Limited

Hirotaka Nanno

Noriyuki Matsusue

Shinichiro Ishino

Tomoki Masuda

Yuko Kawanami

Masakazu Takata

Jiro Yamada

Hideki Kobayashi

Masaki Nishimura

Kenichi Nendai

Masashi Goto

Kaoru Abe

Masashi Komatsu

Kazuma Teramoto

Yoshie Takahashi

Mituru Harada

Sadamu Yoshida

An organic electroluminescence (EL) display panel includes pixels arranged in a matrix of rows and columns, and includes: a substrate; pixel electrode layers that are arranged on the substrate in the matrix; an insulating layer that is provided above the substrate and the pixel electrode layers, and has elongated openings and a grooved portion for each of the pixels, the openings extending in a column direction and being arranged in a row direction, the grooved portion having an upper opening and a bottom and being communicated with at least one of the openings in plan view; organic functional layers that are provided above the pixel electrode layers, and include light emitting layers in which organic electroluminescence occurs in the openings; and a light-transmissive counter electrode layer that is provided above the organic functional layers. Cross-sectional profiles of the openings taken along the row direction are uniform in the column direction.

Organic EL display panel and method for producing same

Organic light-emitting device manufacturing method performed by using a manufacturing apparatus placed where light from outside is blocked and a lighting device emitting light constituted of light components with wavelengths of 500 nm or longer is placed. The manufacturing apparatus includes a main body having an ejector ejecting ink containing organic light-emitting material and a light-transmissive tube forming at least part of a transport path connecting a tank containing the ink and the ejector. The method includes: removing the ink inside the transport path when a total exposure amount ET (lux&#xd7;hours) satisfies ET&#x2265;&#x3b1;&#xd7;17500 where &#x3b1; is a constant satisfying &#x3b1;&#x2265;1. ET is a product of E denoting light amount (lux) from the lighting device to which the tube is exposed and T denoting time amount (hours) over which the tube is exposed to the light from the lighting device.

Organic light-emitting device production method, production system therefor, and production device therefor

A solution contains a functional material for constituting a function layer, and a solvent. The solvent contains a high-boiling-point solvent composed of one or more solvent components having a boiling point of not less than 200&#xb0; C. The high-boiling-point solvent has a viscosity of from 13 mPa&#xb7;s to 25 mPa&#xb7;s, inclusive, and a surface tension of from 33 mN/m to 37 mN/m, inclusive.

Solution for forming function layer contained in organic light emitting element and method for manufacturing organic light emitting element

An ink jet device includes a plurality of ink jet heads each including an ink housing unit that houses therein ink, a pressure application unit that ejects a droplet of the ink by applying pressure to the ink, and a nozzle through which the droplet of the ink is ejected, wherein with respect to at least one of the plurality of ink jet heads, a preliminary drive operation and a main drive operation are performed, the preliminary drive operation is an operation of pushing the ink toward an outer edge of the nozzle to the extent that the droplet of the ink is not ejected through the nozzle, and the main drive operation is an operation of ejecting the droplet of the ink through the nozzle after performance of the preliminary drive operation.

Inkjet device, and method for manufacturing organic EL device

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

Method for producing organic light-emitting element, organic display panel, organic light-emitting device, method for forming functional layer, ink, substrate, organic light-emitting element, organic display device, and inkjet device

A method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics is provided. The method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; positioning the inkjet device above the substrate; and causing the inkjet device to eject a drop of the ink onto the base layer. In the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

An ink jet device includes: an ink jet head including a nozzle through which ink droplet is ejected by applying voltage to piezoelectric element; and an ejection control unit controlling ink droplet ejection amount by varying voltage, voltage waveform of the voltage includes: preliminary vibration wave form part for preliminary drive operation of pushing ink toward outer edge of the nozzle to the extent that the droplet is not ejected; and main vibration waveform part for main drive operation of ejecting the droplet through the nozzle after the preliminary drive operation, the ejection control unit performs the preliminary and main drive operations according to the preliminary vibration waveform part and the main vibration waveform part, respectively, and proportion of displacement amount X of the voltage for the preliminary drive operation to displacement amount Y of the voltage for the main drive operation is set to 20%&#x2266;X/Y&#x2266;40%.

Inkjet device and manufacturing method for organic el device

An inkjet device includes an inkjet head having a pressure applier applying voltage to ink contained in a ink reservoir, by executing a standby drive operation of applying a standby oscillation to the ink and a main drive operation of applying a main oscillation to cause the ink to be discharged from nozzles, such that the start of main drive operation execution is within a period where the displacement in the standby oscillation is oriented toward the interior of the nozzles in order to produce interference between the standby oscillation.

Inkjet apparatus and method for manufacturing organic EL device

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/dm), surface tension &#x3b3; (mN/m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

An ink for an organic light-emitting element includes a first solvent, a second solvent, and a functional material. The first and second solvents have equal or similar boiling points. The first solvent is such that an imitatively formed functional layer formed by replacing the second solvent with the first solvent, in a light-emitting region of an organic light-emitting element, is thicker at both end portions than at a central portion and the top surfaces of the end portions are positioned higher than the top surface of the central portion. The second solvent is such that an imitatively formed functional layer formed by replacing the first solvent with the second solvent, in a light-emitting region of an organic light-emitting element, is thicker at a central portion than at both end portions and the top surface of the central portion is positioned higher than the top surfaces of the end portions.

Ink for organic light-emitting element and a method for producing the same

To provide a method of efficiently manufacturing an organic light-emitting element with excellent light-emitting characteristics by application, the method includes: preparing ink and filling an inkjet device having an ink ejection nozzle with the ink; preparing a substrate having a base layer including a first electrode; and positioning the inkjet device above the substrate, and causing the inkjet device to eject a drop of the ink onto the base layer, wherein, in the preparation of the ink, a value Z denoting a reciprocal of the Ohnesorge number Oh determined by density &#x3c1; (g/m), surface tension &#x3b3; (mN&#xb7;m), and viscosity &#x3b7; (mPa&#xb7;s) of the ink and a diameter r (mm) of the ink ejection nozzle satisfies Formula 1, in the ejection of the drop of the ink, speed V (m/s) of the ejected drop satisfies Formula 2, and the value Z and the speed V (m/s) satisfy Formula 3.

A functional layer of an organic light-emitting element is formed by using an ink including a first solvent and a second solvent having equal or similar boiling points, and a functional material. The first solvent is such that an imitatively formed functional layer formed by replacing the second solvent with the first solvent, in a light-emitting region of an organic light-emitting element, is thicker at both end portions than at a central portion and top surfaces of the end portions are positioned higher than a top surface of the central portion. The second solvent is such that an imitatively formed functional layer formed by replacing the first solvent with the second solvent, in a light-emitting region of an organic light-emitting element, is thicker at a central portion than at both end portions and a top surface of the central portion is positioned higher than top surfaces of the end portions.

Method for manufacturing organic light-emitting element, organic light-emitting element, organic display device, organic light-emitting device, method for forming functional layer, functional member, display device, and light-emitting device

An ink for an organic electroluminescent device includes a functional material, a first solvent, a second solvent, and a third solvent. The functional material is for forming a functional layer of the organic electroluminescent device. The first solvent is for dissolving the functional material. The second solvent has a diester backbone and a second boiling point that is at most equal to a first boiling point of the first solvent or greater than the first boiling point of the first solvent by at most 20&#xb0; C. The third solvent is an aliphatic alcohol and has a third boiling point that is less than the first boiling point of the first solvent and less than the second boiling point of the second solvent.

Ink for organic electroluminescent device, manufacturing method of organic electroluminescent device, organic display panel, organic display apparatus, organic electroluminescent apparatus, ink, forming method of functional layer, and organic electroluminescent device

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Kyoto, Japan

Hirotaka Nanno