Patents by Inventor Tae Matsumoto

Tae Matsumoto 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: 9075369
    Abstract: An apparatus includes an image formation unit including a photosensitive drum and a motor for driving the image formation unit. The apparatus acquires a frequency generator signal, which is phase information output from the motor as the motor rotates. In addition, the apparatus corrects unevenness of the density that may occur due to the rotation of the motor according to the acquired phase information.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: July 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takayuki Fukutani, Yuuji Takayama, Tomoyuki Saiki, Tae Matsumoto, Yuichi Ogawa
  • Patent number: 8891981
    Abstract: An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.
    Type: Grant
    Filed: March 30, 2011
    Date of Patent: November 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tae Matsumoto, Tomoyuki Saiki, Takayuki Fukutani, Yuuji Takayama, Yuichi Ogawa
  • Patent number: 8849134
    Abstract: The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: September 30, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yuichi Ogawa, Takayuki Fukutani, Yuuji Takayama, Tomoyuki Saiki, Tae Matsumoto
  • Patent number: 8737855
    Abstract: A plurality of test patches each including a dark and light image which has density unevenness of a predetermined period in which the plurality of test patches are differentiated in phase difference relative to a phase of density unevenness induced by rotational unevenness occurring at a predetermined period in the motor for driving a photosensitive drum is formed. Then, density information of the plurality of test patches with is detected by a density sensor 41, and the phase of the density unevenness is obtained based on detection results (density information) of the plurality of test patches as well as based on a phase difference corresponding to a test patch whose density unevenness is a predetermined value in amplitude.
    Type: Grant
    Filed: September 27, 2010
    Date of Patent: May 27, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hikaru Uchidate, Tomoyuki Saiki, Tae Matsumoto
  • Publication number: 20110299861
    Abstract: The image forming apparatus includes a CPU that performs control to form an inspection image for determining whether or not banding is suppressed to be smaller than a predetermined threshold value; and a density sensor that detects an intensity of banding periodically occurring in a sub-scanning direction of the formed inspection image. If based the detected banding intensity, the CPU has determined that the banding is not suppressed to be smaller than the predetermined threshold value, the CPU performs control to not perform banding correction or performs control to re-set a relationship between a phase of a rotary member and correction information.
    Type: Application
    Filed: May 27, 2011
    Publication date: December 8, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yuichi Ogawa, Takayuki Fukutani, Yuuji Takayama, Tomoyuki Saiki, Tae Matsumoto
  • Publication number: 20110243582
    Abstract: An image forming apparatus executes banding correction at a level determined according to variation of the density characteristic of the image forming apparatus to achieve a high quality image. In the image forming apparatus, a banding correction unit acquires information about a cause of density variation that may occur in a sub scanning direction of a rotation member, which is used for forming a toner image on an image carrier based on input image information and sets, based on the acquired information, the level of the density correction, which is determined according to the density variation cause information.
    Type: Application
    Filed: March 30, 2011
    Publication date: October 6, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Tae Matsumoto, Tomoyuki Saiki, Takayuki Fukutani, Yuuji Takayama, Yuichi Ogawa
  • Publication number: 20110076040
    Abstract: A plurality of test patches each including a dark and light image which has density unevenness of a predetermined period in which the plurality of test patches are differentiated in phase difference relative to a phase of density unevenness induced by rotational unevenness occurring at a predetermined period in the motor for driving a photosensitive drum is formed. Then, density information of the plurality of test patches with is detected by a density sensor 41, and the phase of the density unevenness is obtained based on detection results (density information) of the plurality of test patches as well as based on a phase difference corresponding to a test patch whose density unevenness is a predetermined value in amplitude.
    Type: Application
    Filed: September 27, 2010
    Publication date: March 31, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Hikaru Uchidate, Tomoyuki Saiki, Tae Matsumoto