Patents by Inventor Taku Yokozawa

Taku Yokozawa 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: 9895894
    Abstract: After printing is performed by driving only some printing elements, the other printing elements are driven so that kogation is deposited on the surface of the other printing elements.
    Type: Grant
    Filed: May 17, 2016
    Date of Patent: February 20, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Taira, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Satoshi Azuma, Yosuke Ishii, Hiroaki Komatsu
  • Patent number: 9873247
    Abstract: A driving pulse to be applied is changed when an overlapped level of invert timing of driving pulse is large.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: January 23, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuhei Oikawa, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Hiroshi Taira, Satoshi Azuma, Yosuke Ishii, Hiroaki Komatsu
  • Patent number: 9855743
    Abstract: Recording elements are driven by changing a driving pulse applied thereto in accordance with information regarding a total number of times the recording elements have been driven.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: January 2, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Hiroshi Taira, Kazuhiko Sato, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Satoshi Azuma, Hiroaki Komatsu
  • Patent number: 9738069
    Abstract: A driving pulse to be applied to a plurality of print elements in a print element array is decided based on the deviation of the discharge amount from the print elements.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: August 22, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yuhei Oikawa, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Hiroshi Taira, Yosuke Ishii, Satoshi Azuma, Hiroaki Komatsu, Kazuhiko Sato
  • Publication number: 20170225459
    Abstract: A recording apparatus is capable of executing multiple types of different temperature control. A recording head of the recording apparatus has multiple temperature sensors disposed at different positions from each other in the recording head. Each of the multiple types of different temperature control is performed based on representative temperatures acquired using different combinations of the temperature sensors.
    Type: Application
    Filed: April 24, 2017
    Publication date: August 10, 2017
    Inventors: Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Hiroaki Komatsu, Satoshi Azuma, Hiroshi Taira
  • Patent number: 9656465
    Abstract: A recording apparatus is capable of executing multiple types of different temperature control. A recording head of the recording apparatus has multiple temperature sensors disposed at different positions from each other in the recording head. Each of the multiple types of different temperature control is performed based on representative temperatures acquired using different combinations of the temperature sensors.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: May 23, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Hiroaki Komatsu, Satoshi Azuma, Hiroshi Taira
  • Publication number: 20170087826
    Abstract: Recording elements are driven by changing a driving pulse applied thereto in accordance with information regarding a total number of times the recording elements have been driven.
    Type: Application
    Filed: September 28, 2016
    Publication date: March 30, 2017
    Inventors: Hiroshi Taira, Kazuhiko Sato, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Satoshi Azuma, Hiroaki Komatsu
  • Patent number: 9522529
    Abstract: A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: December 20, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takaaki Yamaguchi, Toshio Negishi, Taku Yokozawa, Hiroaki Shirakawa, Kazunari Fujii
  • Publication number: 20160347057
    Abstract: A driving pulse to be applied to a plurality of print elements in a print element array is decided based on the deviation of the discharge amount from the print elements.
    Type: Application
    Filed: May 24, 2016
    Publication date: December 1, 2016
    Inventors: Yuhei Oikawa, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Hiroshi Taira, Yosuke Ishii, Satoshi Azuma, Hiroaki Komatsu, Kazuhiko Sato
  • Publication number: 20160339692
    Abstract: After printing is performed by driving only some printing elements, the other printing elements are driven so that kogation is deposited on the surface of the other printing elements.
    Type: Application
    Filed: May 17, 2016
    Publication date: November 24, 2016
    Inventors: Hiroshi Taira, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Satoshi Azuma, Yosuke Ishii, Hiroaki Komatsu
  • Publication number: 20160288494
    Abstract: A substrate includes an AND circuit and an LVC. The AND circuit generates a control signal for switching an NMOS transistor. The LVC controls the gate voltage of the NMOS transistor on the basis of the control signal. The substrate applies a constant gate voltage to a PMOS transistor without using the AND circuit and the LVC.
    Type: Application
    Filed: March 24, 2016
    Publication date: October 6, 2016
    Inventors: Takaaki Yamaguchi, Toshio Negishi, Taku Yokozawa, Hiroaki Shirakawa, Kazunari Fujii
  • Publication number: 20160263885
    Abstract: A driving pulse to be applied is changed when an overlapped level of invert timing of driving pulse is large.
    Type: Application
    Filed: March 8, 2016
    Publication date: September 15, 2016
    Inventors: Yuhei Oikawa, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Hiroshi Taira, Satoshi Azuma, Yosuke Ishii, Hiroaki Komatsu
  • Publication number: 20160257115
    Abstract: In a case where the temperature difference between first and second time points detected by a first temperature sensor provided in a print head is lower than a threshold temperature, a temperature correction for the first temperature sensor is performed based on a temperature detected by a second temperature sensor provided within a printing apparatus thereof. In a case where the temperature difference is higher than the threshold temperature, a temperature correction for the first temperature sensor is performed without using the temperature detected by the second temperature sensor.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 8, 2016
    Inventors: Satoshi Azuma, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Hiroshi Taira, Yosuke Ishii, Hiroaki Komatsu
  • Publication number: 20160257114
    Abstract: A recording apparatus is capable of executing multiple types of different temperature control. A recording head of the recording apparatus has multiple temperature sensors disposed at different positions from each other in the recording head. Each of the multiple types of different temperature control is performed based on representative temperatures acquired using different combinations of the temperature sensors.
    Type: Application
    Filed: March 2, 2016
    Publication date: September 8, 2016
    Inventors: Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Hiroaki Komatsu, Satoshi Azuma, Hiroshi Taira
  • Patent number: 9415588
    Abstract: In a case where the temperature difference between first and second time points detected by a first temperature sensor provided in a print head is lower than a threshold temperature, a temperature correction for the first temperature sensor is performed based on a temperature detected by a second temperature sensor provided within a printing apparatus thereof. In a case where the temperature difference is higher than the threshold temperature, a temperature correction for the first temperature sensor is performed without using the temperature detected by the second temperature sensor.
    Type: Grant
    Filed: March 2, 2016
    Date of Patent: August 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Satoshi Azuma, Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Hiroshi Taira, Yosuke Ishii, Hiroaki Komatsu
  • Patent number: 9315058
    Abstract: According to an aspect of the present invention, temperatures at a plurality of different positions in an array direction in an ejection opening array are detected, and heating by a heating element is executed in a case where a temperature difference between the temperatures is higher than a predetermined threshold.
    Type: Grant
    Filed: May 26, 2015
    Date of Patent: April 19, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Hiroaki Komatsu
  • Patent number: 9259921
    Abstract: First heating is started at a first time point, and a second heating having higher heating energy than the first heating is started at a second time point subsequent to the first time point.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: February 16, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroaki Shirakawa, Yosuke Ishii, Taku Yokozawa, Mitsutoshi Nagamura, Yuhei Oikawa, Hiroaki Komatsu
  • Publication number: 20150367632
    Abstract: First heating is started at a first time point, and a second heating having higher heating energy than the first heating is started at a second time point subsequent to the first time point.
    Type: Application
    Filed: June 15, 2015
    Publication date: December 24, 2015
    Inventors: Hiroaki Shirakawa, Yosuke Ishii, Taku Yokozawa, Mitsutoshi Nagamura, Yuhei Oikawa, Hiroaki Komatsu
  • Publication number: 20150343817
    Abstract: According to an aspect of the present invention, temperatures at a plurality of different positions in an array direction in an ejection opening array are detected, and heating by a heating element is executed in a case where a temperature difference between the temperatures is higher than a predetermined threshold.
    Type: Application
    Filed: May 26, 2015
    Publication date: December 3, 2015
    Inventors: Taku Yokozawa, Hiroaki Shirakawa, Mitsutoshi Nagamura, Yuhei Oikawa, Yosuke Ishii, Hiroaki Komatsu
  • Patent number: RE46517
    Abstract: A method and recording apparatus including discharging ink to record an image, storing a parameter relating to a cumulative recording amount of the recording apparatus, setting a detection interval based on the parameter relating to the cumulative recording amount, and detecting a discharge state of the ink discharged from the recording head based on the set interval.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: August 22, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventors: Taku Yokozawa, Nobumori Shimizu