Patents by Inventor Yoshihisa Terasaka
Yoshihisa Terasaka has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6908638Abstract: 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.Type: GrantFiled: April 28, 1998Date of Patent: June 21, 2005Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Keiichi Furukawa, Yoshihisa Terasaka
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Patent number: 6809473Abstract: 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.Type: GrantFiled: May 3, 2002Date of Patent: October 26, 2004Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Akihito Hisamitsu, Takeshi Kitahora, Yoshihisa Terasaka, Keiichi Furukawa
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Publication number: 20030091912Abstract: Disclosed is a reversible thermosensible recording medium comprising a base board, a rewritable thermosensible recording layer which contains a liquid crystal compound showing a cholesteric liquid crystal phase and is provided on the base board, and a protective layer which is provided on the recording layer and contains an ultraviolet curing resin and at least one of a lubricant and an ultraviolet stabilizer.Type: ApplicationFiled: November 7, 2002Publication date: May 15, 2003Inventors: Hideaki Ueda, Yoshihisa Terasaka, Mitsutoshi Nakamura, Yasumitsu Fujino, Tatsuhiko Miyoshi
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Patent number: 6468676Abstract: 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.Type: GrantFiled: February 1, 2000Date of Patent: October 22, 2002Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Akihito Hisamitsu, Takeshi Kitahora, Yoshihisa Terasaka, Keiichi Furukawa
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Publication number: 20020127431Abstract: An organic electro-luminescence display element comprising: at least a positive electrode; an organic luminescent film; an electron injection layer and a negative electrode, wherein: each of the positive and negative electrodes is formed of a transparent conductive film; the electron injection layer is formed of a thin film having transparency and made of organic metal salt containing alkali metal or alkaline earth metal as the metal, halogenide of alkali metal or alkaline earth metal, or organic metal complex containing alkali metal or alkaline earth metal as the metal; and the organic metal complex is at least one selected from the group consisting of acetylacetonate complex, &agr;-nitroso-&bgr;-naphthol complex, salicylaldoxime complex, cupferron complex, benzoinoxime complex, bipyridine complex, phenanthroline complex, crown complex, proline complex and benzoylacetone complex.Type: ApplicationFiled: May 3, 2002Publication date: September 12, 2002Inventors: Hideaki Ueda, Akihito Hisamitsu, Takeshi Kitahora, Yoshihisa Terasaka, Keiichi Furukawa
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Patent number: 6420055Abstract: 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.Type: GrantFiled: September 29, 1998Date of Patent: July 16, 2002Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Keiichi Furukawa, Yoshihisa Terasaka
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Patent number: 6395409Abstract: 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.Type: GrantFiled: September 28, 1998Date of Patent: May 28, 2002Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Keiichi Furukawa, Yoshihisa Terasaka
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Publication number: 20020041975Abstract: 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.Type: ApplicationFiled: September 29, 1998Publication date: April 11, 2002Inventors: HIDEAKI UEDA, KEIICHI FURUKAWA, YOSHIHISA TERASAKA
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Publication number: 20010051284Abstract: The present invention relates to an organic electroluminescence 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 different material therefrom.Type: ApplicationFiled: September 28, 1998Publication date: December 13, 2001Inventors: HIDEAKI UEDA, KEIICHI FURUKAWA, YOSHIHISA TERASAKA
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Patent number: 6280860Abstract: 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 invention achieves these objects by providing an organic electroluminescent element comprising at least a positive electrode, luminescing layer, electron injecting layer, and negative electrode, wherein said electron injecting layer is a compound layer comprising an electron transporting material and metal, and the negative electrode side of said compound layer has a higher percentage of metal.Type: GrantFiled: September 28, 1998Date of Patent: August 28, 2001Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Yoshihisa Terasaka, Keiichi Furukawa
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Publication number: 20010003601Abstract: 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.Type: ApplicationFiled: April 28, 1998Publication date: June 14, 2001Inventors: HIDEAKI UEDA, KEIICHI FURUKAWA, YOSHIHISA TERASAKA
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Patent number: 6180217Abstract: 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.Type: GrantFiled: March 16, 1998Date of Patent: January 30, 2001Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Keiichi Furukawa, Yoshihisa Terasaka
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Patent number: 6060826Abstract: 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.Type: GrantFiled: March 4, 1998Date of Patent: May 9, 2000Assignee: Minolta Co., Ltd.Inventors: Hideaki Ueda, Keiichi Furukawa, Yoshihisa Terasaka
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Patent number: 5732316Abstract: 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.Type: GrantFiled: December 27, 1994Date of Patent: March 24, 1998Assignee: Minolta Co., Ltd.Inventors: Hiroyuki Yamasaki, Masahide Ueda, Yoshihisa Terasaka, Eiichi Sano, Masahiko Matsuura, Atsuto Hirai, Tomoo Izumi, Masami Yamada
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Patent number: 5568244Abstract: 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.Type: GrantFiled: December 12, 1994Date of Patent: October 22, 1996Assignee: Minolta Co., Ltd.Inventors: Atsuto Hirai, Masahide Ueda, Yoshihisa Terasaka, Eiichi Sano, Masahiko Matsuura, Hiroyuki Yamasaki, Masami Yamada, Tomoo Izumi
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Patent number: 5485257Abstract: 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).Type: GrantFiled: October 19, 1994Date of Patent: January 16, 1996Assignee: Minolta Co., Ltd.Inventors: Masahide Ueda, Tomoo Izumi, Hiroyuki Yamasaki, Atsuto Hirai, Masahiko Matsuura, Eiichi Sano, Yoshihisa Terasaka, Masami Yamada, Satoshi Yoshida
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Patent number: 5427884Abstract: This invention relates to a two-component developer composed of at least a toner and a carrier, in which the toner contains a quaternary ammonium salt and/or a nitrogen-containing polymer and the carrier is coated with a polyolefinic resin layer.Type: GrantFiled: July 30, 1993Date of Patent: June 27, 1995Assignee: Minolta Camera Kabushiki KaishaInventors: Junji Ohtani, Junji Machida, Yoshihisa Terasaka
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Patent number: 5385801Abstract: This invention relates to a method of developing electrostatic latent images which comprises the steps of;mixing a developer including toners having a mean particle size of 3 to 20 .mu.m and resin-coated carriers with a large number of pores having a pore size distribution of 0.001 to 3 .mu.m and a mean pore size of 0.1 to 0.5 .mu.Type: GrantFiled: August 20, 1993Date of Patent: January 31, 1995Assignee: Minolta Camera Kabushiki KaishaInventors: Yoshihisa Terasaka, Junji Ohtani, Junji Machida, Tamotsu Shimizu, Hiroshi Murasaki, Hiroshi Mizuno
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Patent number: 5260159Abstract: This invention relates to a two-component developer for full color copy in the combination of small toner particles which are light-transmittable and composed of a specified resin with carrier particles having pores and/or irregularities.Type: GrantFiled: July 10, 1991Date of Patent: November 9, 1993Assignee: Minolta Camera Kabushiki KaishaInventors: Junji Ohtani, Junji Machida, Yoshihisa Terasaka
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Patent number: 5252398Abstract: The present invention provides a carrier of a two component developer for developing electrostatic latent images comprising;a carrier core material comprising a magnetic particle,an irregular surface-coating layer formed by coating the carrier core material with polyolefinic resin, followed by heat treatment.Type: GrantFiled: January 10, 1991Date of Patent: October 12, 1993Assignees: Minolta Camera Kabushiki Kaisha, Idemitsu Kosan Company LimitedInventors: Junji Ohtani, Yoshihisa Terasaka, Junji Machida, Satoshi Asahi, Hiroshi Hayashi, Kouichi Matono