Patents by Inventor Keiichi Yoshida

Keiichi Yoshida 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: 11393070
    Abstract: An image processing apparatus: obtains a first image in a first projection, a second image in a second projection, and location information indicating locations of a plurality of points in the first image that are respectively associated with a plurality of points in the second image; generates, as an image to be superimposed on the first image, a superimposed image based on the second image, the superimposed image having the plurality of points in the second image at respective locations as indicated by the location information; and superimposes the superimposed image on the first image.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: July 19, 2022
    Assignee: RICOH COMPANY, LTD.
    Inventors: Keiichi Kawaguchi, Takahiro Asai, Hiroshi Suitoh, Kazuhiro Yoshida
  • Patent number: 11373807
    Abstract: An electronic component device includes: an electronic component having: a base body having a pair of end surfaces facing each other and four side surfaces connecting the pair of end surfaces; and a pair of outer electrodes disposed on respective sides of the pair of end surfaces; metal terminals respectively electrically connected to the pair of outer electrodes; and joint portions joining and electrically connecting the outer electrodes to the metal terminals respectively, wherein the electronic component has a metal portion disposed on at least one surface of the four side surfaces, and the metal portion has a baked metal layer.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: June 28, 2022
    Assignee: TDK CORPORATION
    Inventors: Keiichi Takizawa, Naoto Imaizumi, Shogo Murosawa, Takeru Yoshida
  • Patent number: 11335295
    Abstract: A processing system includes a timing controller and source driver circuitry. The timing controller is configured to stop scanning of a plurality of gate lines of a display panel in response to a detection of a communication failure between the processing system and a controller. The source driver circuitry is configured to update a plurality of display elements of the display panel to cause a black display in response to expiration of a time limit after the detection of the communication failure. The timing controller may be further configured to resume the scanning of the plurality of gate lines in response to the expiration of the time limit.
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: May 17, 2022
    Assignee: Synaptics Incorporated
    Inventors: Tomohiro Hirakawa, Takayuki Noto, Masaaki Shiomura, Hirokazu Hatayama, Yoriaki Miyoshi, Keiichi Yoshida, Hiroshi Shimura
  • Patent number: 10684583
    Abstract: An abnormality detection device is configured to detect abnormality in a subject to be driven by a motor via a drive transmission member. The abnormality detection device includes an output signal acquisition unit, a rotational frequency acquisition unit, and a determining unit. The output signal acquisition unit is configured to acquire a rotational frequency output signal output from the motor. The rotational frequency acquisition unit is configured to acquire a motor rotational frequency calculated from the rotational frequency output signal acquired by the output signal acquisition unit. The determining unit is configured to distinctively determine abnormality in the subject to be driven and abnormality in the motor based on the rotational frequency output signal acquired by the output signal acquisition unit and the motor rotational frequency acquired by the rotational frequency acquisition unit.
    Type: Grant
    Filed: February 18, 2019
    Date of Patent: June 16, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Shogo Nakamoto, Kazuhiro Kobayashi, Keiichi Yoshida, Takuya Murata
  • Publication number: 20190265626
    Abstract: An abnormality detection device is configured to detect abnormality in a subject to be driven by a motor via a drive transmission member. The abnormality detection device includes an output signal acquisition unit, a rotational frequency acquisition unit, and a determining unit. The output signal acquisition unit is configured to acquire a rotational frequency output signal output from the motor. The rotational frequency acquisition unit is configured to acquire a motor rotational frequency calculated from the rotational frequency output signal acquired by the output signal acquisition unit. The determining unit is configured to distinctively determine abnormality in the subject to be driven and abnormality in the motor based on the rotational frequency output signal acquired by the output signal acquisition unit and the motor rotational frequency acquired by the rotational frequency acquisition unit.
    Type: Application
    Filed: February 18, 2019
    Publication date: August 29, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Shogo NAKAMOTO, Kazuhiro KOBAYASHI, Keiichi YOSHIDA, Takuya MURATA
  • Patent number: 10295931
    Abstract: A developing device includes a casing to contain developer and define a developer circulation passage, a developing roller to bear the developer, and at least one developer conveyor to convey the developer. The developer conveyor is disposed in the developer circulation passage and lower than the developing roller. The developing device satisfies M1/L2>0.56 g/cm and M1/M2>0.50, where M1 represents an amount of developer borne on the developing roller, L1 represents a width in which the developing roller bears the developer in a longitudinal direction of the developing roller; and M2 represents an amount of developer stored in the casing and excluding the amount of developer borne.
    Type: Grant
    Filed: June 29, 2018
    Date of Patent: May 21, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Shinji Tamaki, Ichiro Kadota, Keiichi Yoshida, Hiroshi Hosokawa
  • Patent number: 10209645
    Abstract: A developing device includes a casing to contain developer, a developer bearer, an upper and lower developer conveyors to convey the developer to one side in an axial direction of rotation shafts thereof, a communicating portion disposed on a first end side on which an input gear is disposed, to fall the developer from the upper developer conveyor to the lower developer conveyor, bearings to receive end portions the upper and lower developer conveyors, and first and second end seals to seal gaps in the bearings on the upper and lower developer conveyors, respectively. The first end seals and the second end are disposed on the first end side and a second end side, respectively. A sliding friction between the rotation shaft and at least one of the first end seals is smaller than a sliding friction between the rotation shaft and the second end seal.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: February 19, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventors: Yuuki Tsuchiya, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Tatsuya Ohhira
  • Publication number: 20190033749
    Abstract: A developing device includes a casing to contain developer and define a developer circulation passage, a developing roller to bear the developer, and at least one developer conveyor to convey the developer. The developer conveyor is disposed in the developer circulation passage and lower than the developing roller. The developing device satisfies M1/L2>0.56 g/cm and M1/M2>0.50, where M1 represents an amount of developer borne on the developing roller, L1 represents a width in which the developing roller bears the developer in a longitudinal direction of the developing roller; and M2 represents an amount of developer stored in the casing and excluding the amount of developer borne.
    Type: Application
    Filed: June 29, 2018
    Publication date: January 31, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Shinji TAMAKI, lchiro KADOTA, Keiichi YOSHIDA, Hiroshi HOSOKAWA
  • Patent number: 10168642
    Abstract: A developing device includes upper and lower developer containing portions to contain developer, arranged in a vertical direction, a first developer conveyor to convey developer in the upper developer containing portion to a first side in an axial direction of the first developer conveyor, a second developer conveyor to convey developer in the lower developer containing portion to a second side opposite the first side, a developer-lifting area in which the developer is lifted from the lower developer containing portion to the upper developer containing portion, a first lifting area gear to rotate the first developer conveyor, a second lifting area gear to rotate the second developer conveyor, and a lifting area input gear to input a driving force to the developing device. The lifting area input gear is coupled to the first lifting area gear and coupled via the first lifting area gear via to the second lifting area gear.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: January 1, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Patent number: 10114334
    Abstract: A developing device includes a developer bearer, a casing defining an upper compartment to contain the developer and a lower compartment disposed lower than the upper compartment, to contain the developer, and a first conveyor and a second conveyor disposed in the upper compartment and the lower compartment, respectively, to convey the developer in a longitudinal direction of the developer bearer and circulate the developer between the upper compartment and the lower compartment through a first communicating opening, through which the developer is conveyed upward, and a second communicating opening. A developer-lifting range of the upper compartment, which opposes the first communicating opening, is larger in volume than a developer-lifting range of the lower compartment. One of the upper compartment and the lower compartment is disposed adjacent to the developer bearer to supply the developer to the developer bearer.
    Type: Grant
    Filed: March 23, 2017
    Date of Patent: October 30, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Patent number: 10088776
    Abstract: A developing device includes a developer bearer including a magnetic field generator, a developer regulator disposed opposite the developer bearer across a regulation gap, a developer containing compartment disposed below the developer bearer, and a conveying screw disposed in the developer containing compartment and including a shaft having a diameter greater than a radius of the conveying screw. On a cross section perpendicular to an axial direction of the conveying screw, a developer scooping pole of the magnetic field generator to scoop the developer from the developer containing compartment onto the developer bearer is disposed between the regulation gap and a bisector dividing an angle extending from a first line, which connects a center of the developer bearer and a center of the conveying screw, to a second line, which connects the center of the developer bearer and the regulation gap, in a rotation direction of the developer bearer.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: October 2, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroshi Hosokawa, Shinji Tamaki, Keiichi Yoshida, Ichiro Kadota, Shunji Katoh
  • Publication number: 20180143568
    Abstract: A developing device includes upper and lower developer containing portions to contain developer, arranged in a vertical direction, a first developer conveyor to convey developer in the upper developer containing portion to a first side in an axial direction of the first developer conveyor, a second developer conveyor to convey developer in the lower developer containing portion to a second side opposite the first side, a developer-lifting area in which the developer is lifted from the lower developer containing portion to the upper developer containing portion, a first lifting area gear to rotate the first developer conveyor, a second lifting area gear to rotate the second developer conveyor, and a lifting area input gear to input a driving force to the developing device. The lifting area input gear is coupled to the first lifting area gear and coupled via the first lifting area gear via to the second lifting area gear.
    Type: Application
    Filed: September 28, 2017
    Publication date: May 24, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Masayuki Yamane, Keiichi Yoshida, Atsushi Kurokawa, Toshiki Hayashi, Yuuki Tsuchiya
  • Publication number: 20180136586
    Abstract: A developing device includes a casing to contain developer, a developer bearer, an upper and lower developer conveyors to convey the developer to one side in an axial direction of rotation shafts thereof, a communicating portion disposed on a first end side on which an input gear is disposed, to fall the developer from the upper developer conveyor to the lower developer conveyor, bearings to receive end portions the upper and lower developer conveyors, and first and second end seals to seal gaps in the bearings on the upper and lower developer conveyors, respectively. The first end seals and the second end are disposed on the first end side and a second end side, respectively. A sliding friction between the rotation shaft and at least one of the first end seals is smaller than a sliding friction between the rotation shaft and the second end seal.
    Type: Application
    Filed: September 6, 2017
    Publication date: May 17, 2018
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuuki TSUCHIYA, Masayuki YAMANE, Keiichi YOSHIDA, Atsushi KUROKAWA, Toshiki HAYASHI, Tatsuya OHHIRA
  • Patent number: 9864297
    Abstract: A developing device includes a developer bearer, a magnetic field generator, a casing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: January 9, 2018
    Assignee: Ricoh Company, Ltd.
    Inventors: Tatsuya Ohhira, Atsushi Kurokawa, Masayuki Yamane, Keiichi Yoshida, Toshiki Hayashi, Sayuri Katoh
  • Publication number: 20170293257
    Abstract: A developing device includes a developer bearer, a casing defining an upper compartment to contain the developer and a lower compartment disposed lower than the upper compartment, to contain the developer, and a first conveyor and a second conveyor disposed in the upper compartment and the lower compartment, respectively, to convey the developer in a longitudinal direction of the developer bearer and circulate the developer between the upper compartment and the lower compartment through a first communicating opening, through which the developer is conveyed upward, and a second communicating opening. A developer-lifting range of the upper compartment, which opposes the first communicating opening, is larger in volume than a developer-lifting range of the lower compartment. One of the upper compartment and the lower compartment is disposed adjacent to the developer bearer to supply the developer to the developer bearer.
    Type: Application
    Filed: March 23, 2017
    Publication date: October 12, 2017
    Inventors: Tatsuya OHHIRA, Masayuki YAMANE, Keiichi YOSHIDA, Atsushi KUROKAWA, Toshiki HAYASHI, Yuuki TSUCHIYA
  • Patent number: 9674994
    Abstract: A wiring harness (10) for connecting a first device and a second device includes a first shield connector (20) to be connected to the first device, a second shield connector (30) to be connected to the second device, wires (40) arranged between the first shield connector (20) and the second shield connector (30), and a shield (50) made of an electrically conductive metal cloth. After the wires (40) are arranged between the first shield connector (20) and the second shield connector (30), the sheet-like shield (50) is mounted to cover the wires (40), thereby shielding between the first and second devices.
    Type: Grant
    Filed: October 30, 2014
    Date of Patent: June 6, 2017
    Assignee: SUMITOMO WIRING SYSTEMS, LTD.
    Inventors: Keiichi Yoshida, Hiroyuki Matsuoka, Takuya Tate
  • Publication number: 20170115605
    Abstract: A developing device includes a developer bearer to bear developer, a developer containing compartment disposed lower than the developer bearer, and a conveying screw disposed in the developer containing compartment. The developing device further includes an inclined face extending from an inner wall of the developer containing compartment obliquely upward toward the developer bearer, and the inclined face opposes the conveying screw from above.
    Type: Application
    Filed: October 7, 2016
    Publication date: April 27, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Keiichi Yoshida, Shinji Tamaki, Ichiro Kadota, Hiroshi Hosokawa
  • Publication number: 20170115604
    Abstract: A developing device includes a developer bearer including a magnetic field generator, a developer regulator disposed opposite the developer bearer across a regulation gap, a developer containing compartment disposed below the developer bearer, and a conveying screw disposed in the developer containing compartment and including a shaft having a diameter greater than a radius of the conveying screw. On a cross section perpendicular to an axial direction of the conveying screw, a developer scooping pole of the magnetic field generator to scoop the developer from the developer containing compartment onto the developer bearer is disposed between the regulation gap and a bisector dividing an angle extending from a first line, which connects a center of the developer bearer and a center of the conveying screw, to a second line, which connects the center of the developer bearer and the regulation gap, in a rotation direction of the developer bearer.
    Type: Application
    Filed: September 28, 2016
    Publication date: April 27, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi HOSOKAWA, Shinji TAMAKI, Keiichi YOSHIDA, Ichiro KADOTA, Shunji KATOH
  • Publication number: 20170090342
    Abstract: A developing device includes a developer bearer, a magnetic field generator, a easing having an opening, a developer conveyor to rotate inside a developer containing compartment below the developer bearer, and a developer regulator. A side wall of the casing defines a bottom end of the opening, and the developer regulator is disposed on the side wall. The side wall includes an upper end face facing the developer bearer below an axis of the developer bearer and a curved inner face along an orbit of rotation of the developer conveyor, extending from below the developer conveyor toward the upper end face. On a virtual plane perpendicular to the axis of the developer bearer, an intersection between a tangent line to an upper end of the curved inner face and the surface of the developer bearer is in a range from a tangential magnetic-flux peak and a closest approach point.
    Type: Application
    Filed: September 30, 2016
    Publication date: March 30, 2017
    Inventors: Tatsuya OHHIRA, Atsushi Kurokawa, Masayuki Yamane, Keiichi Yoshida, Toshiki Hayashi
  • Publication number: 20160255750
    Abstract: A wiring harness (10) for connecting a first device and a second device includes a first shield connector (20) to be connected to the first device, a second shield connector (30) to be connected to the second device, wires (40) arranged between the first shield connector (20) and the second shield connector (30), and a shield (50) made of an electrically conductive metal cloth. After the wires (40) are arranged between the first shield connector (20) and the second shield connector (30), the sheet-like shield (50) is mounted to cover the wires (40), thereby shielding between the first and second devices.
    Type: Application
    Filed: October 30, 2014
    Publication date: September 1, 2016
    Inventors: Keiichi Yoshida, Hiroyuki Matsuoka, Takuya Tate