Patents by Inventor Kouji Miyamoto

Kouji Miyamoto 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: 10876485
    Abstract: An engine control device is provided, which includes an ignition plug configured to ignite mixture gas inside a cylinder of the engine, an injector configured to change an air-fuel ratio inside the cylinder, a NOx sensor, and a controller including a processor. The controller performs a first control to control the ignition plug so that ignition is performed at a basic ignition timing or an ignition timing after the basic timing is corrected based on a combustion state of the mixture gas, and a second control to control the injector so that a NOx concentration approaches a given target value. When the ignition timing is corrected by the first control to a retarding side, the controller suspends a correction to a richer side even if the NOx concentration is a concentration at which the air-fuel ratio is corrected to the richer side by the second control.
    Type: Grant
    Filed: October 2, 2019
    Date of Patent: December 29, 2020
    Assignee: Mazda Motor Corporation
    Inventors: Kota Maekawa, Takeatsu Ito, Kouji Miyamoto
  • Patent number: 10820385
    Abstract: An LED drive circuit drives an LED module. The LED module has a light-emitting diode, and an identification unit having characteristic information relating to light-emitting characteristics of the light-emitting diode. The LED drive circuit includes a detection unit and a drive circuit. The detection unit is provided for detecting characteristic information, and generates a detection signal that corresponds to the characteristic information. The drive circuit generates drive current by a drive signal supplied according to the characteristic information based on the detection signal, and supplies the drive current to drive the light-emitting diode.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: October 27, 2020
    Assignee: Rohm Co., Ltd.
    Inventors: Kenichi Fukumoto, Koji Katsura, Ryosuke Kanemitsu, Junichi Itai, Nobuaki Matsui, Seiji Nakashima, Kouji Miyamoto
  • Publication number: 20200141344
    Abstract: An engine control device is provided, which includes an ignition plug configured to ignite mixture gas inside a cylinder of the engine, an injector configured to change an air-fuel ratio inside the cylinder, a NOx sensor, and a controller including a processor. The controller performs a first control to control the ignition plug so that ignition is performed at a basic ignition timing or an ignition timing after the basic timing is corrected based on a combustion state of the mixture gas, and a second control to control the injector so that a NOx concentration approaches a given target value. When the ignition timing is corrected by the first control to a retarding side, the controller suspends a correction to a richer side even if the NOx concentration is a concentration at which the air-fuel ratio is corrected to the richer side by the second control.
    Type: Application
    Filed: October 2, 2019
    Publication date: May 7, 2020
    Inventors: Kota Maekawa, Takeatsu Ito, Kouji Miyamoto
  • Publication number: 20190387591
    Abstract: An LED drive circuit drives an LED module. The LED module has a light-emitting diode, and an identification unit having characteristic information relating to light-emitting characteristics of the light-emitting diode. The LED drive circuit includes a detection unit and a drive circuit. The detection unit is provided for detecting characteristic information, and generates a detection signal that corresponds to the characteristic information. The drive circuit generates drive current by a drive signal supplied according to the characteristic information based on the detection signal, and supplies the drive current to drive the light-emitting diode.
    Type: Application
    Filed: January 31, 2018
    Publication date: December 19, 2019
    Applicant: ROHM CO., LTD.
    Inventors: Kenichi FUKUMOTO, Koji Katsura, Ryosuke Kanemitsu, Junichi ITAI, Nobuaki MATSUI, Seiji NAKASHIMA, Kouji Miyamoto
  • Patent number: 10151045
    Abstract: A method for producing a crystal, according to the present invention, where the lower surface 4B of a seed crystal 4 which is rotatably arranged and made of silicon carbide is brought into contact with a solution 5 of silicon solvent containing carbon in a crucible 6 which is rotatably arranged and the seed crystal 4 is pulled up and a crystal of silicon carbide is grown from the solution 5 on the lower surface 4B of the seed crystal 4, comprising the steps of bringing the lower surface 4B of the seed crystal 4 into contact with the solution 5 in a contact step, rotating the seed crystal 4 in a seed crystal rotation step, rotating the crucible 6 in a crucible rotation step, and stopping rotation of the crucible 6, while the seed crystal 4 is rotated in the state in which the lower surface 4B of the seed crystal 4 is in contact with the solution 5, in a deceleration step.
    Type: Grant
    Filed: July 13, 2017
    Date of Patent: December 11, 2018
    Assignee: KYOCERA CORPORATION
    Inventors: Chiaki Domoto, Katsuaki Masaki, Yutaka Kuba, Daisuke Ueyama, Kouji Miyamoto, Yuuichiro Hayashi
  • Publication number: 20170342592
    Abstract: A method for producing a crystal, according to the present invention, where the lower surface 4B of a seed crystal 4 which is rotatably arranged and made of silicon carbide is brought into contact with a solution 5 of silicon solvent containing carbon in a crucible 6 which is rotatably arranged and the seed crystal 4 is pulled up and a crystal of silicon carbide is grown from the solution 5 on the lower surface 4B of the seed crystal 4, comprising the steps of bringing the lower surface 4B of the seed crystal 4 into contact with the solution 5 in a contact step, rotating the seed crystal 4 in a seed crystal rotation step, rotating the crucible 6 in a crucible rotation step, and stopping rotation of the crucible 6, while the seed crystal 4 is rotated in the state in which the lower surface 4B of the seed crystal 4 is in contact with the solution 5, in a deceleration step.
    Type: Application
    Filed: July 13, 2017
    Publication date: November 30, 2017
    Applicant: KYOCERA Corporation
    Inventors: Chiaki DOMOTO, Katsuaki MASAKI, Yutaka KUBA, Daisuke UEYAMA, Kouji MIYAMOTO, Yuuichiro HAYASHI
  • Patent number: 9777396
    Abstract: A method for producing a crystal, according to the present invention, where the lower surface of a seed crystal which is rotatably arranged and made of silicon carbide is brought into contact with a solution of silicon solvent containing carbon in a crucible which is rotatably arranged and the seed crystal is pulled up and a crystal of silicon carbide is grown from the solution on the lower surface of the seed crystal, comprising the steps of bringing the lower surface of the seed crystal into contact with the solution in a contact step, rotating the seed crystal in a seed crystal rotation step, rotating the crucible in a crucible rotation step, and stopping rotation of the crucible, while the seed crystal is rotated in the state in which the lower surface of the seed crystal is in contact with the solution, in a deceleration step.
    Type: Grant
    Filed: October 29, 2012
    Date of Patent: October 3, 2017
    Assignee: KYOCERA CORPORATION
    Inventors: Chiaki Domoto, Katsuaki Masaki, Yutaka Kuba, Daisuke Ueyama, Kouji Miyamoto, Yuuichiro Hayashi
  • Patent number: 9735293
    Abstract: This solar cell element, which is increased in the conversion efficiency due to improved effect of passivation, includes a semiconductor substrate in which a p-type first semiconductor region and an n-type second semiconductor region are stacked such that the first semiconductor region is located nearmost a first principal surface side and the second semiconductor region is located nearmost a second principal surface side; and a first passivation film containing aluminum oxide and arranged on the first principal surface side of the first semiconductor region. In the inside of the first passivation film of the solar cell element, the first ratio obtained by dividing the aluminum atomic density by the oxygen atomic density is 0.613 or more and less than 0.667 and the second ratio obtained by dividing the sum of the aluminum atomic density and the hydrogen atomic density by the oxygen atomic density is 0.667 or more and less than 0.786.
    Type: Grant
    Filed: March 28, 2013
    Date of Patent: August 15, 2017
    Assignee: Kyocera Corporation
    Inventors: Kouji Miyamoto, Shigeo Aono, Tomofumi Honjo, Shiro Miyazaki, Masahiro Tanaka, Koichiro Niira, Kenichi Kurobe
  • Patent number: 9351369
    Abstract: A leakage current detection circuit detects a switch current flowing in a switch which is targeted for leakage monitoring, and generates a detection signal to prohibit operation of a control target circuit which is targeted for control when the switch current does not reach a predetermined threshold value.
    Type: Grant
    Filed: August 20, 2013
    Date of Patent: May 24, 2016
    Assignees: Rohm Co., Ltd., Honda Motor Co., Ltd.
    Inventors: Kouji Miyamoto, Masaaki Nakayama, Akira Aoki, Koji Okamoto, Masaharu Ando, Yosuke Tsuchiya
  • Publication number: 20150362463
    Abstract: A sensor which uses a detection element such as a surface acoustic wave element, and includes a flow passage for a specimen is provided. A sensor includes a substrate; a detection element located on the substrate and having a detection portion which detects an object to be detected contained in a specimen, in an upper surface thereof; and a flow passage structure located on the substrate and covering the detection portion with a space. The flow passage structure has an inlet for the specimen, a flow passage continuing from the inlet, and a space which continues from an end portion of the flow passage closer to the detection element and is located above the detection portion, and a bottom surface of the flow passage has, on the end portion of the flow passage closer to the detection element, a notched portion whose width gradually decreases toward an upstream of the flow passage.
    Type: Application
    Filed: December 19, 2013
    Publication date: December 17, 2015
    Inventors: Yasutaka OHASHI, Atsuomi FUKUURA, Tetsuro UMEMURA, Kouji MIYAMOTO, Hiroyasu TANAKA, Hiroyuki YAMAJI
  • Patent number: 9096272
    Abstract: A cowl panel comprises an upper face portion, a protrusion portion, a vertical wall portion, and a lower face portion. A front end of the protrusion portion is configured in a curve shape in a plan view such that a central portion, in the vehicle width direction, of the front end is positioned forward the most. A lower end of the vertical wall portion is configured such that at least a central portion, in the vehicle width direction, of the lower end extends substantially straightly in the vehicle width direction. Accordingly, the flexibility of interior design can be improved, and also both the NVH performance and the pedestrian protection performance can be ensured.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: August 4, 2015
    Assignee: Mazda Motor Corporation
    Inventors: Kouji Miyamoto, Noriyoshi Sahasi, Yasuhiko Nishida
  • Publication number: 20150075605
    Abstract: This solar cell element, which is increased in the conversion efficiency due to improved effect of passivation, includes a semiconductor substrate in which a p-type first semiconductor region and an n-type second semiconductor region are stacked such that the first semiconductor region is located nearmost a first principal surface side and the second semiconductor region is located nearmost a second principal surface side; and a first passivation film containing aluminum oxide and arranged on the first principal surface side of the first semiconductor region. In the inside of the first passivation film of the solar cell element, the first ratio obtained by dividing the aluminum atomic density by the oxygen atomic density is 0.613 or more and less than 0.667 and the second ratio obtained by dividing the sum of the aluminum atomic density and the hydrogen atomic density by the oxygen atomic density is 0.667 or more and less than 0.786.
    Type: Application
    Filed: March 28, 2013
    Publication date: March 19, 2015
    Inventors: Kouji Miyamoto, Shigeo Aono, Tomofumi Honjo, Shiro Miyazaki, Masahiro Tanaka, Koichiro Niira, Kenichi Kurobe
  • Publication number: 20140299046
    Abstract: A method for producing a crystal, according to the present invention, where the lower surface of a seed crystal which is rotatably arranged and made of silicon carbide is brought into contact with a solution of silicon solvent containing carbon in a crucible which is rotatably arranged and the seed crystal is pulled up and a crystal of silicon carbide is grown from the solution on the lower surface of the seed crystal, comprising the steps of bringing the lower surface of the seed crystal into contact with the solution in a contact step, rotating the seed crystal in a seed crystal rotation step, rotating the crucible in a crucible rotation step, and stopping rotation of the crucible, while the seed crystal is rotated in the state in which the lower surface of the seed crystal is in contact with the solution, in a deceleration step.
    Type: Application
    Filed: October 29, 2012
    Publication date: October 9, 2014
    Applicant: KYOCERA Corporation
    Inventors: Chiaki Domoto, Katsuaki Masaki, Yutaka Kuba, Daisuke Ueyama, Kouji Miyamoto, Yuuichiro Hayashi
  • Publication number: 20140175835
    Abstract: A cowl panel comprises an upper face portion, a protrusion portion, a vertical wall portion, and a lower face portion. A front end of the protrusion portion is configured in a curve shape in a plan view such that a central portion, in the vehicle width direction, of the front end is positioned forward the most. A lower end of the vertical wall portion is configured such that at least a central portion, in the vehicle width direction, of the lower end extends substantially straightly in the vehicle width direction. Accordingly, the flexibility of interior design can be improved, and also both the NVH performance and the pedestrian protection performance can be ensured.
    Type: Application
    Filed: December 18, 2013
    Publication date: June 26, 2014
    Applicant: MAZDA MOTOR CORPORATION
    Inventors: Kouji MIYAMOTO, Noriyoshi SAHASI, Yasuhiko NISHIDA
  • Publication number: 20140055031
    Abstract: A leakage current detection circuit detects a switch current flowing in a switch which is targeted for leakage monitoring, and generates a detection signal to prohibit operation of a control target circuit which is targeted for control when the switch current does not reach a predetermined threshold value.
    Type: Application
    Filed: August 20, 2013
    Publication date: February 27, 2014
    Applicants: HONDA MOTOR CO., LTD., Rohm Co., Ltd.
    Inventors: Kouji MIYAMOTO, Masaaki NAKAYAMA, Akira AOKI, Koji OKAMOTO, Masaharu ANDO, Yosuke TSUCHIYA
  • Patent number: 6152105
    Abstract: An engine control device has an idle speed control of an engine by an ignition timing control and an idle speed control by air-by-fuel ratio feedback. This engine control device detects roughness caused by a torque change on the basis of a change in angular velocity of a crank shaft, sets a control gain depending on the roughness, reflects the control gain on the idle speed control by the ignition timing control, thereby harmonizing the idle speed control of the engine by the ignition timing control with the idle speed control by the air-by-fuel ratio feedback.
    Type: Grant
    Filed: February 26, 1999
    Date of Patent: November 28, 2000
    Assignee: Mazda Motor Corporation
    Inventors: Eiji Nishimura, Takahisa Ishihara, Kouji Miyamoto
  • Patent number: D455693
    Type: Grant
    Filed: June 29, 2000
    Date of Patent: April 16, 2002
    Assignee: Mazda Motor Corporation
    Inventors: Youichi Sato, Kouji Tabata, Kouji Miyamoto, Norihito Iwao