Patents by Inventor Kenichi Onaka
Kenichi Onaka 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: 10534121Abstract: The present invention provides a means for suppressing an occurrence of a ghost by enhancing diffraction efficiency of a holographic optical element having a volume hologram recording layer. The present invention is a holographic optical element including: a volume hologram recording layer containing a photopolymer; and at least one adjacent layer which is in contact with the volume hologram recording layer and contains a resin, wherein a diffraction grating is formed so as to extend from the volume hologram recording layer to the adjacent layer.Type: GrantFiled: July 12, 2016Date of Patent: January 14, 2020Assignee: KONICA MINOLTA, INC.Inventors: Saburou Hiraoka, Kenichi Onaka, Daisuke Watanabe, Yuya Kubo, Kishio Tamura
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Publication number: 20180217312Abstract: The present invention relates to a holographic optical element having a volume hologram recording layer containing a photopolymer, and at least one adjacent layer that is in contact with the volume hologram recording layer and contains a resin and a thiol compound. According to the present invention, a means for improving the diffraction efficiency of a holographic optical element having a volume hologram recording layer is provided.Type: ApplicationFiled: July 12, 2016Publication date: August 2, 2018Inventors: Saburou HIRAOKA, Kenichi ONAKA, Daisuke WATANABE, Yuya KUBO, Kishio TAMURA
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Publication number: 20180217311Abstract: The present invention provides a means for suppressing an occurrence of a ghost by enhancing diffraction efficiency of a holographic optical element having a volume hologram recording layer. The present invention is a holographic optical element including: a volume hologram recording layer containing a photopolymer, and at least one adjacent layer which is in contact with the volume hologram recording layer and contains a resin, wherein a diffraction grating is formed so as to extend from the volume hologram recording layer to the adjacent layer.Type: ApplicationFiled: July 12, 2016Publication date: August 2, 2018Inventors: SABUROU HIRAOKA, KENICHI ONAKA, DAISUKE WATANABE, YUYA KUBO, KISHIO TAMURA
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Patent number: 9099657Abstract: Provided is a photoelectric conversion element containing at least: a semiconductor layer containing a semiconductor and a dye which is supported by the semiconductor, and a hole transport layer containing a hole transport compound, wherein the dye is a compound represented by Formula (1), and the hole transport compound is a polymer made from 3,4-ethylenedioxythiophene:Type: GrantFiled: September 27, 2011Date of Patent: August 4, 2015Assignee: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazuya Isobe, Kenichi Onaka, Hidekazu Kawasaki
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Patent number: 9029694Abstract: A photoelectric conversion element comprising a substrate, a first electrode, a photoelectric conversion layer comprising a semiconductor and a sensitizing dye, a hole transport layer and a second electrode, wherein the hole transport layer comprises a polymer having a repeat unit represented by Formula (1) or (2),Type: GrantFiled: July 29, 2011Date of Patent: May 12, 2015Assignee: Konica Minolta, Inc.Inventors: Kazukuni Nishimura, Kazuya Isobe, Kenichi Onaka
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Patent number: 8642720Abstract: The present invention provides a photoelectric conversion element exhibiting excellent photoelectric conversion efficiency and excellent stability in photoelectric conversion function; a method of manufacturing the photoelectric conversion element; and a solar cell thereof in order to solve the current problems.Type: GrantFiled: September 9, 2011Date of Patent: February 4, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kenichi Onaka, Kazuya Isobe, Kazukumi Nishimura
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Patent number: 8455164Abstract: The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.Type: GrantFiled: July 3, 2009Date of Patent: June 4, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Tsuyoshi Uchida, Masahiko Nakamura, Kenichi Onaka, Junya Onishi, Naoya Tonegawa
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Patent number: 8431298Abstract: Provided are a toner and a toner manufacturing method with which high image density and a broad range of color reproduction are obtained, and with which high-quality images are also obtained. The toner is composed of toner particles that comprise a binding resin containing a polyester resin and a colorant, and contains 10-1,500 ppm of a metal element selected from titanium, germanium, and aluminum, and a cyclic phenol sulfide represented by general formula (1) selected from thiacalixarene, sulfinyl thiacalixarene and sulfonyl thiacalixarene.Type: GrantFiled: June 26, 2009Date of Patent: April 30, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Masahiko Nakamura, Tsuyoshi Uchida, Kouichi Sugama, Kenichi Onaka, Junya Onishi
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Publication number: 20130056074Abstract: Disclosed is a dye-sensitized solar cell having at least a substrate, a first electrode, a photoelectric conversion layer containing a semiconductor and a sensitizing dye, a positive hole transporting layer containing a solid positive hole transporting material, and a second electrode, in which the positive hole transporting material contains a polythiophene-based polymer which is a conductive polymer formed via copolymerization of at least 2 compounds having a structure represented by Formula (1), (2), or (3) described in the specification.Type: ApplicationFiled: August 28, 2012Publication date: March 7, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazuya ISOBE, Kenichi ONAKA, Takayuki ISHIKAWA
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Publication number: 20130048076Abstract: In the present invention, a dye-sensitizing solar cell with which high open voltage (Voc) and high short-circuit current (Jsc) are obtained is provided even though a conductive polymer is used as a hole transport material, whereby high photoelectric conversion efficiency can be obtained. Disclosed is a dye-sensitized solar cell comprising a substrate, a first electrode, a photoelectric conversion layer comprising a semiconductor and a sensitizing dye, a hole transport layer comprising a solid stale hole transport material, and a second electrode, wherein the solid state hole transport material contained in the hole transport layer comprises a conductive polymer formed by polymerizing a compound having a thiophene structure, and the hole transport layer has an ionization potential of 5.0-5.5 eV.Type: ApplicationFiled: August 8, 2012Publication date: February 28, 2013Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazuya ISOBE, Kenichi ONAKA
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Publication number: 20120325319Abstract: A photoelectric conversion element excellent in photoelectric conversion efficiency and stability of photoelectric conversion function, a method for producing the photoelectric conversion element, and a solar cell comprising the photoelectric conversion element are provided. The present invention relates to a photoelectric conversion element comprising a substrate, a first electrode, a photoelectric conversion layer containing a semiconductor and a sensitizing dye, and a hole transport layer, and a second electrode, wherein the hole transport layer comprises a polymer having a repeating unit represented by the general formula (1) or (2), and the sensitizing dye is represented by any of the general formulas (3A) to (3C).Type: ApplicationFiled: June 12, 2012Publication date: December 27, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazukuni NISHIMURA, Kenichi ONAKA, Kazuya ISOBE
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Patent number: 8278019Abstract: Provided is a method of manufacturing an electrostatic charge image developing toner exhibiting reduced variation in charging amount among manufacturing lots, which is capable of generating no fog, and acquiring high density print images. Disclosed is a method of manufacturing an electrostatic charge image developing toner, possessing the step of washing toner mother particles having been formed in an aqueous medium with washing water, wherein the washing water has a total dissolution component amount of at least 0.05 mg/liter and less than 0.5 mg/liter.Type: GrantFiled: February 22, 2010Date of Patent: October 2, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Eiichi Yoshida, Kenichi Onaka
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Publication number: 20120085411Abstract: Provided is a photoelectric conversion element containing at least: a semiconductor layer containing a semiconductor and a dye which is supported by the semiconductor, and a hole transport layer containing a hole transport compound, wherein the dye is a compound represented by Formula (1), and the hole transport compound is a polymer made from 3,4-ethylenedioxythiophene:Type: ApplicationFiled: September 27, 2011Publication date: April 12, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazuya ISOBE, Kenichi ONAKA, Hidekazu KAWASAKI
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Publication number: 20120073661Abstract: Provided is a photoelectric conversion element composed of a highly durable sensitizing dye, exhibiting high photoelectric conversion efficiency, and also a solar cell fitted with the photoelectric conversion element.Type: ApplicationFiled: September 20, 2011Publication date: March 29, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenichi ONAKA, Kazuya ISOBE, Hideya MIWA, Kazukuni NISHIMURA
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Publication number: 20120060927Abstract: The present invention provides a photoelectric conversion element exhibiting excellent photoelectric conversion efficiency and excellent stability in photoelectric conversion function; a method of manufacturing the photoelectric conversion element; and a solar cell thereof in order to solve the current problems.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kenichi ONAKA, Kazuya ISOBE, Kazukuni NISHIMURA
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Patent number: 8133646Abstract: It is to provide a toner which can form an image of high image quality exhibiting high resolution wherein a final visible image exhibits high image density and high thin-line reproducibility even in long-term use. In a toner incorporating at least a colored particle containing a binder resin composed of a polyester resin and a colorant, and external additive particles, the toner has a degree of average circularity of 0.950-0.990, a volume based median diameter of 4.5-8.0 ?m, a volume based particle diameter dispersibility (CVVOL value) of 15-25; a metal selected from titanium, germanium, and aluminum is incorporated at a ratio of 10-1500 ppm; the above external additive particles is composed of a composite oxide incorporating a silicon atom and at least either of a titanium atom and an aluminum atom; and the existence ratio of silicon atoms in the surface thereof is higher than the existence ratio of silicon atoms in the entire part thereof.Type: GrantFiled: March 18, 2009Date of Patent: March 13, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Masahiko Nakamura, Tsuyoshi Uchida, Kenichi Onaka, Junya Onishi, Naoya Tonegawa
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Publication number: 20120042953Abstract: A photoelectric conversion element comprising a substrate, a first electrode, a photoelectric conversion layer comprising a semiconductor and a sensitizing dye, a hole transport layer and a second electrode, wherein the hole transport layer comprises a polymer having a repeat unit represented by Formula (1) or (2),Type: ApplicationFiled: July 29, 2011Publication date: February 23, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Kazukuni NISHIMURA, Kazuya ISOBE, Kenichi ONAKA
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Patent number: 8101330Abstract: A two component developer comprising a toner and a carrier, wherein the toner includes: colored particles; and external additive particles comprising a complex oxide incorporating silicon atoms and at least one of titanium atoms and aluminum atoms, and a surface existing ratio of the silicon atoms (R2) in a surface of the external additive particles being larger than an average existing ratio of the silicon atoms (R1) in an entirety of the external additive particles, and carrier particles comprise magnetic material powder dispersed in a phenol-formaldehyde resin, and have an average of the shape coefficient SF-1 of 1.0 to 12 and an average of the shape coefficient SF-2 of 1.1 to 2.5, and a volume based median diameter of from 10 to 100 ?m.Type: GrantFiled: March 4, 2009Date of Patent: January 24, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Masahiko Nakamura, Tsuyoshi Uchida, Kenichi Onaka, Junya Onishi, Naoya Tonegawa
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Publication number: 20120009515Abstract: The present invention provides a developer for electrophotography which is superior in property of build up of electrification and in charge stability even in environments of high temperature and high humidity or in an environment of low temperature and low humidity where it is difficult for a developer to retain its electrostatic charge performance, and which can provide an image free from fogging and decrease in density for a long term, that is, a developer for electrophotography containing composite oxide particles which include metal titanate particles containing titanium as a first metal atom and a second metal atom and containing therein 0.009 to 0.350% by weight of a third metal atom selected from the group consisting of the metal atoms belonging to Group 5A of the long form of the periodic table of elements.Type: ApplicationFiled: July 3, 2009Publication date: January 12, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Masahiro Anno, Tsuyoshi Uchida, Masahiko Nakamura, Kenichi Onaka, Junya Onishi, Naoya Tonegawa
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Patent number: 8092965Abstract: Provided is a method for forming an image containing the steps of: (a) forming an electrostatic latent image on an electrostatic latent image carrier; and (b) developing the electrostatic latent image by a two component developer comprising a toner and a carrier, wherein the two component developer is continually replenished in the developing step (b); and the toner includes: colored particles; and external additive particles comprising a complex oxide incorporating silicon atoms and at least one of titanium atoms and aluminum atoms, and a surface existing ratio of the silicon atoms (R2) in a surface of the external additive particles being larger than an average existing ratio of the silicon atoms (R1) in an entirety of the external additive particles.Type: GrantFiled: February 17, 2009Date of Patent: January 10, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Masahiro Anno, Masahiko Nakamura, Tsuyoshi Uchida, Kenichi Onaka, Junya Onishi, Naoya Tonegawa