Patents by Inventor Hayato FUJITA

Hayato FUJITA 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: 9961227
    Abstract: A light source drive control device includes: an image data generating part that generates line-thinned image data having been subjected to line thinning processing for thinning an edge pixel in image data by a first pixel width; an intensity information generating part that generates intensity information including a first intensity at which a pixel not included in a set second pixel width of an edge in the line-thinned image data is exposed and a second intensity at which a pixel included in the second pixel width is exposed and which is higher than the first intensity; and a light source driving part that drives a light source based on a light source modulation signal generated according to the line-thinned image data and a drive current data switched based on a drive current switching signal generated based on the intensity information.
    Type: Grant
    Filed: February 4, 2016
    Date of Patent: May 1, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Atsufumi Omori, Masaaki Ishida, Muneaki Iwata, Hayato Fujita
  • Publication number: 20180108930
    Abstract: A frame body for a redox flow battery is provided with a window. The expressions A>C, B>D, and (B/A)?0.2 are satisfied, where A represents the length of a long side of a rectangle that envelops the window, B represents the width of a horizontal frame corresponding to the long side, C represents the length of a short side of the rectangle, and D represents the width of a vertical frame corresponding to the short side.
    Type: Application
    Filed: February 28, 2017
    Publication date: April 19, 2018
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Masahiro Kuwabara, Haruhisa Toyoda, Takashi Kanno, Takefumi Ito, Hideyuki Yamaguchi, Hayato Fujita, Kousuke Shiraki, Kiyoaki Hayashi
  • Publication number: 20180091697
    Abstract: An image processing device includes circuitry to: acquire an image matrix including a target pixel from first image data having a first resolution; determine whether one or more detection patterns match the image matrix; and perform edge enhancement on the target pixel and convert the first resolution into a second resolution to convert the target pixel into second image data, if the image matrix matches any of the one or more detection patterns. The first image data includes a plurality of pixels each including first and second pixel values respectively indicating image information and whether each of the plurality of pixels is an area where a specific object is drawn. The one or more detection patterns, each including a plurality of pixels each including the first and second pixel values, are patterns to detect a pixel forming an edge portion where the first and second pixel values vary between pixels.
    Type: Application
    Filed: September 6, 2017
    Publication date: March 29, 2018
    Applicant: Ricoh Company, Ltd.
    Inventor: Hayato FUJITA
  • Publication number: 20170343920
    Abstract: An image forming apparatus includes a photoconductor, a light source, and circuitry that receives: first image data including first pixels each indicating image density or one of turning on and off the light source; and tag data indicating an attribute of each first pixels. The circuitry sets specific data to identify a first target pixel subjected to change out of the first pixels, converts the first image data into second image data having a higher resolution than that of the first image data, and controls the light source according to the second image data to form an image. In conversion, the circuitry identifies a second target pixel corresponding to the first target pixel out of second pixels of the second image data according to the specific data and the tag data, and changes the second target pixel into a pixel to turn on the light source.
    Type: Application
    Filed: May 19, 2017
    Publication date: November 30, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Tatsuya Miyadera, Muneaki Iwata, Hayato Fujita
  • Publication number: 20170339309
    Abstract: An image processing device includes: a first matching circuit to determine whether an image matrix of image data of a first resolution matches a first pattern, and output a first determination result; a first converting circuit to, if the image matrix matches the first pattern, replace a target pixel of the image matrix with a first pixel pattern of a second resolution, and output first image data of the second resolution; a second converting circuit to convert the image data of the first resolution into image data of the second resolution, and output second image data of the second resolution; a detecting circuit to detect whether the target pixel is included in a fine line structure, and output a detection result; and a selecting circuit to output one of the first image data and the second image data based on the first determination result and the detection result.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 23, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Shigeru UEKUSA, Hayato FUJITA, Muneaki IWATA
  • Publication number: 20170339308
    Abstract: An image processing apparatus includes: a first inverter to output binary image data having first resolution, as image data having pixel values that are inverted or image data having unprocessed pixel values, in accordance with an inversion signal; a thinning processor to convert the image data output from the first inverter from the first resolution to second resolution and perform a thinning process of thinning pixels of edge portions of the image data in units of the second resolution; and a second inverter to output the image data having the second resolution for which the thinning process is performed, as image data having pixel values that are inverted or image data having unprocessed pixel values, in accordance with the inversion signal.
    Type: Application
    Filed: April 21, 2017
    Publication date: November 23, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hayato FUJITA, Muneaki IWATA
  • Publication number: 20170324108
    Abstract: Provided are a battery cell that can be produced efficiently. A frame body of each cell frame of a battery cell includes an inner peripheral recessed portion formed by reducing a thickness of a peripheral portion that surrounds an entire perimeter of the penetrating window so that the peripheral portion has a smaller thickness than other portions of the frame body. A bipolar plate of the battery cell includes an outer peripheral engaging portion that engages with the inner peripheral recessed portion, the outer peripheral engaging portion being a portion having a particular width and extending throughout an entire outer periphery of the bipolar plate.
    Type: Application
    Filed: October 5, 2015
    Publication date: November 9, 2017
    Inventors: Hideyuki Yamaguchi, Katsuya Yamanishi, Takashi Kanno, Takefumi Ito, Masahiro Kuwabara, Kiyoaki Moriuchi, Kiyoaki Hayashi, Hayato Fujita, Kousuke Shiraki
  • Publication number: 20170286814
    Abstract: An image forming apparatus includes: an image processor configured to perform first image processing on image data having a first resolution and to add tag data to a target pixel where second image processing is to be performed; a resolution converter configured to convert the image data into image data having a second resolution higher than the first resolution, and to perform the second image processing based on arrangement of the image data having the first resolution and the tag data; a pulse generator configured to generate an on-off modulation signal and an application-current switching signal in accordance with the image data having undergone the second image processing; and a light source driver configured to drive the light source in accordance with a current setting value output from an application current setter depending on the application-current switching signal and the on-off modulation signal.
    Type: Application
    Filed: April 12, 2017
    Publication date: October 5, 2017
    Inventors: Hayato FUJITA, Masaaki ISHIDA, Atsufumi OMORI, Muneaki IWATA
  • Patent number: 9760813
    Abstract: An image forming apparatus that forms an image according to light emitted from a light source is provided. The image forming apparatus includes: a first image processor that performs image processing on image data having a first resolution and outputs the resulting image data; a resolution converter that acquires the image data having the first resolution output from the first image processor and converts the image data to image data having a second resolution that is higher than the first resolution; a modulation signal generator that modulates the image data having the second resolution according to a clock signal to thereby generate a modulation signal; a light source driver that drives the light source according to the modulation signal; and a second image processor that performs image processing on the image data having the second resolution to be modulated to the modulation signal.
    Type: Grant
    Filed: July 17, 2015
    Date of Patent: September 12, 2017
    Assignee: RICOH COMPANY, LTD
    Inventors: Muneaki Iwata, Masaaki Ishida, Atsufumi Omori, Hayato Fujita
  • Publication number: 20170255152
    Abstract: A motor connection detecting device includes: a bipolar stepping motor; a motor driver adapted to control current to be supplied to the bipolar stepping motor; and a controller connected to the bipolar stepping motor and the motor driver. The controller detects voltage of regenerative current generated during motor ON time in which current flows in the bipolar stepping motor, and determines abnormal connection of the bipolar stepping motor. The detected voltage is voltage generated during a fast decay period according to a current attenuation method of the regenerative current.
    Type: Application
    Filed: February 9, 2017
    Publication date: September 7, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Hiroshi OKAMURA, Tomohide KONDOH, Hayato FUJITA
  • Publication number: 20170237104
    Abstract: The battery cell for a flow battery includes a cell frame including a frame including a through-window and a manifold serving as an electrolyte flow path, and a bipolar plate blocking the through-window; a positive electrode disposed on one surface side of the bipolar plate; and a negative electrode disposed on another surface side of the bipolar plate. In this battery cell, in the frame, a thickness of a portion in which the manifold is formed is defined as Ft; in the bipolar plate, a thickness of a portion blocking the through-window is defined as Bt; in the positive electrode, a thickness of a portion facing the bipolar plate is defined as Pt; in the negative electrode, a thickness of a portion facing the bipolar plate is defined as Nt; and these thicknesses satisfy Ft?4 mm, Bt?Ft?3.0 mm, Pt?1.5 mm, and Nt?1.5 mm.
    Type: Application
    Filed: October 5, 2015
    Publication date: August 17, 2017
    Inventors: Takashi Kanno, Katsuya Yamanishi, Takefumi Ito, Masahiro Kuwabara, Kiyoaki Moriuchi, Hideyuki Yamaguchi, Hayato Fujita, Kousuke Shiraki, Kiyoaki Hayashi
  • Patent number: 9703248
    Abstract: A curling detection device includes an endless belt entrained around at least two rollers, a conveyance unit that conveys the endless belt by driving the rollers, an image forming unit that forms an image by transferring a toner image to either a surface of the endless belt directly or a recording medium on the endless belt, a pattern image forming controller that instructs the image forming unit to form lines of a curling detection pattern at predetermined intervals in a conveying direction of the endless belt and a predetermined angle against the conveying direction of the endless belt at a predetermined timing, a curling scanning unit that scans the curling detection pattern, and a detecting unit that detects a curling of the endless belt based on the interval of the curling detection pattern scanned by the curling scanning unit.
    Type: Grant
    Filed: May 8, 2015
    Date of Patent: July 11, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventor: Hayato Fujita
  • Patent number: 9703244
    Abstract: An image forming apparatus includes: a photoconductor drum; an optical scanning device that drives a light source to scan a surface of the photoconductor drum and form a latent image on the surface; a developing device that develops the latent image; and a density detector to detect density variation of an image in a rotation direction of the photoconductor drum, the image being developed by the developing device. The optical scanning device includes a processing device that is capable of correcting a driving signal for driving the light source on a basis of an output signal of the density detector to adjust at least either one of a correction period and a correction strength of correction data for the driving signal for a rotation period of the photoconductor drum.
    Type: Grant
    Filed: March 11, 2016
    Date of Patent: July 11, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Muneaki Iwata, Masaaki Ishida, Atsufumi Omori, Naoto Watanabe, Hayato Fujita
  • Patent number: 9659243
    Abstract: An image forming apparatus includes: an image processor configured to perform first image processing on image data having a first resolution and to add tag data to a target pixel where second image processing is to be performed; a resolution converter configured to convert the image data into image data having a second resolution higher than the first resolution, and to perform the second image processing based on arrangement of the image data having the first resolution and the tag data; a pulse generator configured to generate an on-off modulation signal and an application-current switching signal in accordance with the image data having undergone the second image processing; and a light source driver configured to drive the light source in accordance with a current setting value output from an application current setter depending on the application-current switching signal and the on-off modulation signal.
    Type: Grant
    Filed: February 19, 2016
    Date of Patent: May 23, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Hayato Fujita, Masaaki Ishida, Atsufumi Omori, Muneaki Iwata
  • Publication number: 20170110741
    Abstract: A cell frame for a redox flow battery comprises: a bipolar plate; and a frame body provided at an outer periphery of the bipolar plate, the frame body including a manifold which penetrates through front and back surfaces of the frame body and through which an electrolyte flows, and at least one slit being formed on the front surface of the frame body and forming a channel of the electrolyte between the manifold and the bipolar plate, a cross sectional shape of the slit, in a longitudinal direction of the slit, having a width w and a depth h, the width w and the depth h satisfying (A) w?3 mm and (B) 1/8<h/w<1.
    Type: Application
    Filed: March 18, 2016
    Publication date: April 20, 2017
    Inventors: Takefumi Ito, Takashi Kanno, Masahiro Kuwabara, Katsuya Yamanishi, Hideyuki Yamaguchi, Hayato Fujita, Kiyoaki Hayashi, Kousuke Shiraki, Kiyoaki Moriuchi
  • Patent number: 9606471
    Abstract: An image forming apparatus for forming an image by scanning an image bearer with light modulated in accordance with image information includes a light source configured to emit the light and a control device configured to control the light source in accordance with the image information. The control device sets light emission duration of the light source for forming a particular pixel in the image to be shorter than light emission duration of the light source for forming a normal pixel, which is a pixel other than the particular pixel irk the image, and sets light emission intensity of the light source for forming the particular pixel to be higher than light emission intensity of the light source for forming the normal pixel.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: March 28, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masaaki Ishida, Atsufumi Omori, Muneaki Iwata, Hayato Fujita
  • Patent number: 9591177
    Abstract: An image forming apparatus forms an image by optical scanning. The image forming apparatus includes: a light source; an image processing unit that processes image data; a modulation signal generation unit that generates a light source modulation signal; a light source drive unit that drives the light source based on the light source modulation signal; and a correction value identifying unit that identifies a correction value for correcting a registration error of an image to be formed. The image processing unit performs first image processing of image data with first resolution based on a correction value identified by the correction value identifying unit, the first image processing including deformation processing and gradation processing of the image data. The modulation signal generation unit converts image data processed in the image processing unit into image data with resolution higher than the first resolution and performs second image processing.
    Type: Grant
    Filed: May 29, 2015
    Date of Patent: March 7, 2017
    Assignee: RICOH COMPANY, LTD.
    Inventors: Muneaki Iwata, Masaaki Ishida, Naoto Watanabe, Hayato Fujita
  • Publication number: 20170047594
    Abstract: Provided are a bipolar plate that can decrease the internal resistance of a flow battery, a redox flow battery, and a method for producing a bipolar plate. A bipolar plate sandwiched between a positive electrode in which a positive electrode electrolyte flows and a negative electrode in which a negative electrode electrolyte flows includes a positive-electrode-side surface in which a flow channel having a plurality of grooves through which the positive electrode electrolyte flows is provided and a negative-electrode-side surface in which a flow channel having a plurality of grooves through which the negative electrode electrolyte flows is provided.
    Type: Application
    Filed: January 23, 2015
    Publication date: February 16, 2017
    Inventors: Kei Hanafusa, Kenichi Itou, Souichirou Okumura, Takemi Terao, Hayato Fujita
  • Publication number: 20170017177
    Abstract: An image forming apparatus includes a photoconductor drum, a latent-image forming device, a developing device, a density detecting device, and a processing device. The density detecting device is configured to detect densities at a plurality of positions in a main-scanning direction on a developed image. The processing device is configured to acquire at least two light-amount correction tables respectively associated with at least two positions of the plurality of positions in the main-scanning direction on the developed image, the light-amount correction tables being for reducing density variations in a sub-scanning direction at the at least two positions, and correct, for each scan, a set point for setting an amount of light of a light source based on a difference in corresponding correction data between two light-amount correction tables respectively associated with two adjacent positions of the at least two light-amount correction tables.
    Type: Application
    Filed: July 6, 2016
    Publication date: January 19, 2017
    Inventors: Muneaki IWATA, Masaaki ISHIDA, Atsufumi OMORI, Hayato FUJITA, Takefumi TAKIZAWA
  • Patent number: 9527303
    Abstract: An image forming apparatus includes a drive signal generating unit that generates a drive signal for driving a light source based on a reference pulse signal serving as a reference to form a plurality of pixels arranged in the main-scanning direction of an image, and the drive signal generating unit generates the drive signal by adjusting the pulse width of the reference pulse signal so that the amplitude of portions of the reference pulse signal with the adjusted pulse width corresponding to specific pixels among the pixels is larger than the amplitude of portions corresponding to normal pixels that are pixels other than the specific pixels among the pixels, and so that the pulse width of the portions of the reference pulse signal with the adjusted pulse width corresponding to the specific pixels is smaller than the pulse width of the portions corresponding to the normal pixels.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: December 27, 2016
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masaaki Ishida, Atsufumi Omori, Muneaki Iwata, Hayato Fujita