Patents by Inventor Kota Yoshikawa

Kota Yoshikawa 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).

  • Patent number: 9989898
    Abstract: A polishing unit is attached to an opening/closing cover included in a fixing device so as to polish a fixing belt. The polishing unit includes: a polishing unit body support member that is detachably attached to the opening/closing cover; and a polishing section that is held by the polishing unit body support member and that makes contact with the fixing belt so as to polish the fixing belt when the opening/closing cover is closed.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: June 5, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Motoki Ohta, Kota Yoshikawa
  • Publication number: 20170212456
    Abstract: A polishing unit is attached to an opening/closing cover included in a fixing device so as to polish a fixing belt. The polishing unit includes: a polishing unit body support member that is detachably attached to the opening/closing cover; and a polishing section that is held by the polishing unit body support member and that makes contact with the fixing belt so as to polish the fixing belt when the opening/closing cover is closed.
    Type: Application
    Filed: January 24, 2017
    Publication date: July 27, 2017
    Inventors: Motoki OHTA, Kota YOSHIKAWA
  • Publication number: 20160197281
    Abstract: In order to form a photoelectric conversion layer of a photoelectric conversion element, mixed liquid including poly-[N-9?-heptadecanyl-2,7-carbazole-alt-5,5-(4?,7?-di-2-thienyl2?,1?,3?-benzothiadiazle)] as a p-type organic semiconductor material and a fullerene derivative as an n-type organic semiconductor material, which configure a bulk heterojunction are applied and dried. The dried substance is exposed in an atmosphere including vapor of a solvent that dissolves the p-type organic semiconductor material preferentially to the n-type organic semiconductor material.
    Type: Application
    Filed: March 15, 2016
    Publication date: July 7, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Satoru MOMOSE, Kota YOSHIKAWA, Shuuichi DOI
  • Publication number: 20150221885
    Abstract: A photoelectric conversion device includes a positive electrode, a negative electrode, and a photoelectric conversion layer including a p-type organic semiconductor material and an n-type organic semiconductor material that configure a bulk heterojunction. The photoelectric conversion layer includes an amorphous polymer compound including a carbazole ring, a fluorene ring or a cyclopentadithiopene ring in a main chain as the p-type organic semiconductor material, and includes an amorphous fullerene derivative as the n-type organic semiconductor material. The photoelectric conversion layer has a diffraction peak corresponding to a plane spacing d=1.6 nm to 2.0 nm in an X-ray diffraction profile.
    Type: Application
    Filed: April 13, 2015
    Publication date: August 6, 2015
    Inventors: Satoru MOMOSE, Kota YOSHIKAWA, Shuuichi DOI
  • Publication number: 20120148755
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film. The first conductive film contains any one of an alkaline metal and an alkaline earth metal. The second conductive film contains any one of at least one type metal selected from a group consisting of Ru (ruthenium), Rh (rhodium), Ir (iridium), Os (osmium) and Re (rhenium) and its oxide.
    Type: Application
    Filed: January 4, 2012
    Publication date: June 14, 2012
    Applicant: FUJITSU LIMITED
    Inventor: Kota YOSHIKAWA
  • Patent number: 7208234
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film. The first conductive film contains any one of an alkaline metal and an alkaline earth metal. The second conductive film contains any one of at least one type metal selected from a group consisting of Ru (ruthenium), Rh (rhodium), Jr (iridium), Os (osmium) and Re (rhenium) and its oxide.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: April 24, 2007
    Assignee: Fujitsu Limited
    Inventor: Kota Yoshikawa
  • Patent number: 7153592
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film. The first conductive film contains any one of an alkaline metal and an alkaline earth metal. The second conductive film contains any one of at least one type metal selected from a group consisting of Ru (ruthenium), Rh (rhodium), Ir (iridium), Os (osmium) and Re (rhenium) and its oxide.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: December 26, 2006
    Assignee: Fujitsu Limited
    Inventor: Kota Yoshikawa
  • Publication number: 20060204788
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film. The first conductive film contains any one of an alkaline metal and an alkaline earth metal. The second conductive film contains any one of at least one type metal selected from a group consisting of Ru (ruthenium), Rh (rhodium), Ir (iridium), Os (osmium) and Re (rhenium) and its oxide.
    Type: Application
    Filed: May 17, 2006
    Publication date: September 14, 2006
    Applicant: FUJITSU LIMITED
    Inventor: Kota Yoshikawa
  • Patent number: 6977464
    Abstract: The present invention provides an organic EL device including a pair of electrodes consisting of a positive electrode and a negative electrode; a plurality of banks which is disposed between the pair of electrodes and insulates the positive electrode and the negative electrode; and an organic EL light-emitting material in a plurality of gaps formed by bank partitions, wherein if the distance between the bank partitions in the gap at one electrode side is d, the distance between the bank partitions except at the one electrode side is d? and the distance between the bank partitions at the other electrode side to the one electrode side is d?, then at least one of the gaps satisfies d>d?, and the distance between the bank partitions in the gap progressively satisfies d?d??0 from the one electrode side to the other electrode side. The present invention also provides an efficient method of manufacturing the organic EL device.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: December 20, 2005
    Assignee: Fujitsu Limited
    Inventor: Kota Yoshikawa
  • Publication number: 20050208206
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film. The first conductive film contains any one of an alkaline metal and an alkaline earth metal. The second conductive film contains any one of at least one type metal selected from a group consisting of Ru (ruthenium), Rh (rhodium), Ir (iridium), Os (osmium) and Re (rhenium) and its oxide.
    Type: Application
    Filed: May 20, 2005
    Publication date: September 22, 2005
    Applicant: FUJITSU LIMITED
    Inventor: Kota Yoshikawa
  • Publication number: 20050134172
    Abstract: The present invention provides an organic EL device including a pair of electrodes consisting of a positive electrode and a negative electrode; a plurality of banks which is disposed between the pair of electrodes and insulates the positive electrode and the negative electrode; and an organic EL light-emitting material in a plurality of gaps formed by bank partitions, wherein if the distance between the bank partitions in the gap at one electrode side is d, the distance between the bank partitions except at the one electrode side is d? and the distance between the bank partitions at the other electrode side to the one electrode side is d?, then at least one of the gaps satisfies d>d?, and the distance between the bank partitions in the gap progressively satisfies d?d??0 from the one electrode side to the other electrode side. The present invention also provides an efficient method of manufacturing the organic EL device.
    Type: Application
    Filed: February 18, 2005
    Publication date: June 23, 2005
    Inventor: Kota Yoshikawa
  • Patent number: 6846580
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by is put between a lower electrode and an upper electrode. Where, in the above chemical formula, Ar1, Ar2 denote a allylene group respectively, R1, R2, R3, R4 denote a substituent respectively, and n denotes a copolymerization ratio. Accordingly, the flatness of the luminous layer can be improved and the solubility of the luminous layer constituent material can be enhanced.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: January 25, 2005
    Assignee: Fujitsu Limited
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita
  • Publication number: 20040155577
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by 1
    Type: Application
    Filed: February 9, 2004
    Publication date: August 12, 2004
    Applicant: Fujitsu Limited
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita
  • Publication number: 20020051894
    Abstract: In an organic EL element, an organic EL layer is interposed between anodes and cathodes formed on a substrate. Each of the cathodes is made of a first conductive film that comes into contact with the organic EL layer and a second conductive film that constitutes a laminated structure together with the first conductive film.
    Type: Application
    Filed: July 30, 2001
    Publication date: May 2, 2002
    Applicant: FUJITSU LIMITED
    Inventor: Kota Yoshikawa
  • Publication number: 20020001734
    Abstract: An organic EL device employing polymer material includes a structure in which a luminous layer formed of a polymer indicated by 1
    Type: Application
    Filed: April 26, 2001
    Publication date: January 3, 2002
    Inventors: Kota Yoshikawa, Masashi Kijima, Hideki Shirakawa, Ikuo Kinoshita