Patents by Inventor Naotsugu Yamamura

Naotsugu Yamamura 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: 11459276
    Abstract: The present invention provides an alumina-based thermally conductive oxide that is excellent not only in thermal conductivity but also in chemical resistance, water resistance, and electrical insulation, that has a good kneadability (miscibility) into resins, and that enables to produce a material or an article, such as a resin composition, which is excellent in shapability. The present invention is an alumina-based thermally conductive oxide obtained by firing a starting material mixture containing an aluminum starting material.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: October 4, 2022
    Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.
    Inventors: Akira Nishio, Kenichi Yamane, Naotsugu Yamamura, Shingo Tominaga, Hiroya Oniduka
  • Publication number: 20190359875
    Abstract: Provided is an alumina-based thermally conductive oxide which has not only an excellent thermal conductivity but also excellent chemical resistance, water-fastness, and electrical insulation property, while exhibiting a satisfactory kneadability (miscibility) into a resin and being capable of producing materials and articles, such as a resin composition, having an excellent shapability. Specifically, the present invention is an alumina-based thermally conductive oxide which is obtained by firing a starting material mixture that contains an aluminum starting material. The aluminum starting material is at least one selected from the group consisting of boehmite, aluminum hydroxide, and alumina; the starting material mixture further contains a boric acid compound and an oxide starting material such as a tungsten compound; and the content of the boric acid compound in the starting material mixture is 0.1 to 5 parts by mass, and the content of the oxide starting material in the starting material mixture is 0.
    Type: Application
    Filed: February 27, 2018
    Publication date: November 28, 2019
    Inventors: Akira NISHIO, Kenichi YAMANE, Naotsugu YAMAMURA, Shingo TOMINAGA, Hiroya ONIDUKA
  • Patent number: 10327009
    Abstract: In an earliest vertical synchronization period after sending an encoded image data is restarted, a first reference image determination circuit determines to employ a local decoded image generated in a vertical synchronization period immediately preceding a vertical synchronization period in which an error occurs among multiple local decoded images stored in a first DRAM as a reference image. In an earliest vertical synchronization period after a decoding circuit is reset, a second reference image determination circuit determines to employ a decoded image generated in the vertical synchronization period immediately preceding the vertical synchronization period in which the error occurs among multiple decoded images stored in a second DRAM as a reference image.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: June 18, 2019
    Assignee: MegaChips Corporation
    Inventors: Naotsugu Yamamura, Akira Okamoto, Nobuyuki Takasu
  • Patent number: 10072195
    Abstract: The thermally conductive composite oxide of the present invention has excellent physical properties, such as high thermal conductivity, water resistance, acid resistance, electric resistance, and electric insulation, required for coating films, films, and articles thereof. Paints or resins including the composite oxide can provide coating films, films, and articles having such properties without treating of a surface, etc. The composite oxide has a spinel structure and contains aluminum as a main metal component and at least one metal other than aluminum, which is magnesium, zinc, calcium, and/or strontium, and has a ratio (b mol)/(a mol) in a range of 0.1 or more and 1.0 or less, where the ratio (b mol)/(a mol) is a number of moles (b) of the metal other than aluminum to that of moles (a) of an aluminum element derived from an alumina-based compound. The thermally conductive composite oxide has Mohs hardness of less than 9.
    Type: Grant
    Filed: March 12, 2015
    Date of Patent: September 11, 2018
    Assignee: DAINICHISEIKA COLOR & CHEMICALS MFG. CO., LTD.
    Inventors: Akira Nishio, Toru Kawakami, Kenichi Yamane, Naotsugu Yamamura, Shingo Tominaga
  • Publication number: 20180244578
    Abstract: The present invention provides an alumina-based thermally conductive oxide that is excellent not only in thermal conductivity but also in chemical resistance, water resistance, and electrical insulation, that has a good kneadability (miscibility) into resins, and that enables to produce a material or an article, such as a resin composition, which is excellent in shapability. The present invention is an alumina-based thermally conductive oxide obtained by firing a starting material mixture containing an aluminum starting material.
    Type: Application
    Filed: September 6, 2016
    Publication date: August 30, 2018
    Inventors: Akira NISHIO, Kenichi YAMANE, Naotsugu YAMAMURA, Shingo TOMINAGA, Hiroya ONIDUKA
  • Publication number: 20170134755
    Abstract: In an earliest vertical synchronization period after sending an encoded image data is restarted, a first reference image determination circuit determines to employ a local decoded image generated in a vertical synchronization period immediately preceding a vertical synchronization period in which an error occurs among multiple local decoded images stored in a first DRAM as a reference image. In an earliest vertical synchronization period after a decoding circuit is reset, a second reference image determination circuit determines to employ a decoded image generated in the vertical synchronization period immediately preceding the vertical synchronization period in which the error occurs among multiple decoded images stored in a second DRAM as a reference image.
    Type: Application
    Filed: January 13, 2017
    Publication date: May 11, 2017
    Applicant: MegaChips Corporation
    Inventors: Naotsugu YAMAMURA, Akira Okamoto, Nobuyuki Takasu
  • Patent number: 9641867
    Abstract: In an earliest vertical synchronization period after sending an encoded image data is restarted, a first reference image determination circuit determines to employ a local decoded image generated in a vertical synchronization period immediately preceding a vertical synchronization period in which an error occurs among multiple local decoded images stored in a first DRAM as a reference image. In an earliest vertical synchronization period after a decoding circuit is reset, a second reference image determination circuit determines to employ a decoded image generated in the vertical synchronization period immediately preceding the vertical synchronization period in which the error occurs among multiple decoded images stored in a second DRAM as a reference image.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: May 2, 2017
    Assignee: MegaChips Corporation
    Inventors: Naotsugu Yamamura, Akira Okamoto, Nobuyuki Takasu
  • Publication number: 20160369148
    Abstract: An object of the present invention is to provide a thermally conductive composite oxide that can realize physical properties required for coating films, films, and molded products obtained by single use of the thermally conductive composite oxide blended into paints and resin compositions without the need for an improvement measure such as surface treatment and that is excellent in thermal conductivity, water resistance, acid resistance, and electric insulation.
    Type: Application
    Filed: March 12, 2015
    Publication date: December 22, 2016
    Inventors: Akira NISHIO, Toru KAWAKAMI, Kenichi YAMANE, Naotsugu YAMAMURA, Shingo TOMINAGA
  • Patent number: 9407919
    Abstract: In an image coding apparatus (1), a Hadamard transform unit (11) performs horizontal Hadamard transform on a picture of uncompressed image data (21). The sum total of absolute values of AC component values obtained by the Hadamard transform is calculated as a Hadamard value (23) of the picture. A scene change determination unit (12) determines whether a scene change occurs or not in the picture on the basis of the Hadamard value (23). In a case where a scene change occurs in the picture or where a differential absolute value between the amount of generated codes in a coded GOP and the ideal amount of codes in a GOP is larger than a predetermined reference value, a quantization parameter determination unit (13) determines a quantization parameter (24) of the picture on the basis of the Hadamard value (23) and the target amount of codes of the picture. A coding unit (14) codes the picture by using the determined quantization parameter (24).
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: August 2, 2016
    Assignee: MegaChips Corporation
    Inventors: Naotsugu Yamamura, Akira Okamoto, Makoto Saito, Takuya Hiraoka
  • Publication number: 20160119648
    Abstract: In an earliest vertical synchronization period after sending an encoded image data is restarted, a first reference image determination circuit determines to employ a local decoded image generated in a vertical synchronization period immediately preceding a vertical synchronization period in which an error occurs among multiple local decoded images stored in a first DRAM as a reference image. In an earliest vertical synchronization period after a decoding circuit is reset, a second reference image determination circuit determines to employ a decoded image generated in the vertical synchronization period immediately preceding the vertical synchronization period in which the error occurs among multiple decoded images stored in a second DRAM as a reference image.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 28, 2016
    Applicant: MegaChips Corporation
    Inventors: Naotsugu YAMAMURA, Akira Okamoto, Nobuyuki Takasu
  • Publication number: 20150163495
    Abstract: In an image coding apparatus (1), a Hadamard transform unit (11) performs horizontal Hadamard transform on a picture of uncompressed image data (21). The sum total of absolute values of AC component values obtained by the Hadamard transform is calculated as a Hadamard value (23) of the picture. A scene change determination unit (12) determines whether a scene change occurs or not in the picture on the basis of the Hadamard value (23). In a case where a scene change occurs in the picture or where a differential absolute value between the amount of generated codes in a coded GOP and the ideal amount of codes in a GOP is larger than a predetermined reference value, a quantization parameter determination unit (13) determines a quantization parameter (24) of the picture on the basis of the Hadamard value (23) and the target amount of codes of the picture. A coding unit (14) codes the picture by using the determined quantization parameter (24).
    Type: Application
    Filed: February 18, 2015
    Publication date: June 11, 2015
    Applicant: MegaChips Corporation
    Inventors: Naotsugu YAMAMURA, Akira OKAMOTO, Makoto SAITO, Takuya HIRAOKA
  • Patent number: 9053387
    Abstract: Each second selection circuit selects, out of a plurality of evaluation values, an evaluation value being in a predetermined relative positional relation with a first evaluation value as an evaluation value outputted from a first selection circuit, and outputs the selected value. The predetermined relative positional relations are different from one another among a plurality of second selection circuits. Every time a second evaluation value is outputted from the second selection circuit corresponding to the integration circuit, the integration circuit reads a weigh value corresponding to a combination of the second evaluation value and the first evaluation, which makes a pair with the second evaluation and is outputted from the first selection circuit, from a storage circuit corresponding to the second selection circuit and integrates the read values.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: June 9, 2015
    Assignee: MegaChips Corporation
    Inventor: Naotsugu Yamamura
  • Patent number: 9031341
    Abstract: In an image coding apparatus (1), a Hadamard transform unit (11) performs horizontal Hadamard transform on a picture of uncompressed image data (21). The sum total of absolute values of AC component values obtained by the Hadamard transform is calculated as a Hadamard value (23) of the picture. A scene change determination unit (12) determines whether a scene change occurs or not in the picture on the basis of the Hadamard value (23). In a case where a scene change occurs in the picture or where a differential absolute value between the amount of generated codes in a coded GOP and the ideal amount of codes in a GOP is larger than a predetermined reference value, a quantization parameter determination unit (13) determines a quantization parameter (24) of the picture on the basis of the Hadamard value (23) and the target amount of codes of the picture. A coding unit (14) codes the picture by using the determined quantization parameter (24).
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: May 12, 2015
    Assignee: MegaChips Corporation
    Inventors: Naotsugu Yamamura, Akira Okamoto, Makoto Saito, Takuya Hiraoka
  • Publication number: 20140294293
    Abstract: Each second selection circuit selects, out of a plurality of evaluation values, an evaluation value being in a predetermined relative positional relation with a first evaluation value as an evaluation value outputted from a first selection circuit, and outputs the selected value. The predetermined relative positional relations are different from one another among a plurality of second selection circuits. Every time a second evaluation value is outputted from the second selection circuit corresponding to the integration circuit, the integration circuit reads a weigh value corresponding to a combination of the second evaluation value and the first evaluation, which makes a pair with the second evaluation and is outputted from the first selection circuit, from a storage circuit corresponding to the second selection circuit and integrates the read values.
    Type: Application
    Filed: March 19, 2014
    Publication date: October 2, 2014
    Applicant: MegaChips Corporation
    Inventor: Naotsugu YAMAMURA
  • Publication number: 20130336593
    Abstract: In an image coding apparatus (1), a Hadamard transform unit (11) performs horizontal Hadamard transform on a picture of uncompressed image data (21). The sum total of absolute values of AC component values obtained by the Hadamard transform is calculated as a Hadamard value (23) of the picture. A scene change determination unit (12) determines whether a scene change occurs or not in the picture on the basis of the Hadamard value (23). In a case where a scene change occurs in the picture or where a differential absolute value between the amount of generated codes in a coded GOP and the ideal amount of codes in a GOP is larger than a predetermined reference value, a quantization parameter determination unit (13) determines a quantization parameter (24) of the picture on the basis of the Hadamard value (23) and the target amount of codes of the picture. A coding unit (14) codes the picture by using the determined quantization parameter (24).
    Type: Application
    Filed: February 24, 2012
    Publication date: December 19, 2013
    Applicant: MegaChips Corporation
    Inventors: Naotsugu Yamamura, Akira Okamoto, Makoto Saito, Takuya Hiraoka