Patents by Inventor Shoji Takeda

Shoji Takeda 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: 10670985
    Abstract: An image forming apparatus includes a photosensitive member, a light source, a deflecting unit, a storing unit, a correcting unit, and a light source driving portion. Magnification correction data is determined using a quadratic function of a variable representing a scanning position with respect to a scanning direction. Coefficients of two quadratic functions corresponding to adjacent two regions included in a plurality of scanning regions are set so that a differential value calculated at the variable corresponding to a boundary of the two regions by a differential of the quadratic function for one region and a differential value calculated at the variable corresponding to the boundary of the two regions by a differential of the quadratic function for the other region are equal to each other.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: June 2, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shoji Takeda
  • Patent number: 10567617
    Abstract: An image processing apparatus includes (A) a dither processing unit to perform dither processing on first image data to generate second image data, the second image data including a target pixel and an adjacent pixel, each of the pixels having a density value, the density value of the target pixel being greater than that of the adjacent pixel, and the density value of the adjacent pixel being not greater than a predetermined density, (B) a diffusing unit (a) to determine an error value resulting at the target pixel, (b) to diffuse the error value to pixels subsequent to the target pixel, and not to diffuse an error value resulting at the adjacent pixel to pixels subsequent to the adjacent pixel.
    Type: Grant
    Filed: March 13, 2018
    Date of Patent: February 18, 2020
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shoji Takeda
  • Patent number: 10550451
    Abstract: An object of the present invention is to provide an Ni-based alloy pipe or tube for nuclear power with reduced rate of SCC crack propagation. The Ni-based alloy pipe or tube for nuclear power according to the present invention is an Ni-based alloy pipe or tube having a wall thickness of 15 to 55 mm, having a chemical composition of, in mass %: 0.010 to 0.025% C; 0.10 to 0.50% Si; 0.01 to 0.50% Mn; up to 0.030% P; up to 0.002% S; 52.5 to 65.0% Ni; 20.0 to 35.0% Cr; 0.03 to 0.30% Mo; up to 0.018% Co; up to 0.015% Sn; 0.005 to 0.050% N; 0 to 0.300% Ti; 0 to 0.200% Nb; 0 to 0.300% Ta; 0% or more and less than 0.03% Zr; and the balance being Fe and impurities, wherein the Ni-based alloy pipe or tube has a microstructure being an austenite single phase, and the chemical composition satisfies the following equation, Eq. (1): ?0.0020?[N]/14?{[Ti]/47.9+[Nb]/92.9+[Ta]/180.9+[Zr]/91.2}?0.0015??Eq. (1). For the element symbols in Eq. (1), the contents of the corresponding elements in mass % are substituted.
    Type: Grant
    Filed: June 21, 2016
    Date of Patent: February 4, 2020
    Assignee: Nippon Steel Corporation
    Inventors: Kiyoko Takeda, Shoji Kinomura
  • Patent number: 10503002
    Abstract: According to one embodiment, a display device includes a first substrate including a first insulating substrate located in a first area and a second area, and a first conductive layer provided in the second area, a second substrate including a second insulating substrate located in the first area, and a second conductive layer, and a first connection line opposed to a first side surface of the second insulating substrate to electrically connect the first conductive layer and the second conductive layer. The first connection line is formed of a photosensitive resin containing a conductive material.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: December 10, 2019
    Assignee: Japan Display Inc.
    Inventors: Arihiro Takeda, Shoji Hinata, Yoshikatsu Imazeki, Nobuko Fukuoka, Jin Hirosawa
  • Publication number: 20190243275
    Abstract: The information processing apparatus includes: a detector configured to detect a change in a predetermined signal; and a specifier configured to specify a reflective surface used to scan a photosensitive member, based on a timing at which the change is detected. The detector is further configured to, in a period until specifying the reflective surface, detect the change after a predetermined amount of time has passed after the change has been detected, and after specifying the reflective surface, detect the change after an amount of time based on the specified reflective surface has passed after the change has been detected.
    Type: Application
    Filed: January 25, 2019
    Publication date: August 8, 2019
    Inventor: Shoji Takeda
  • Publication number: 20190171129
    Abstract: An image forming apparatus includes a photosensitive member, a light source, a deflecting unit, a storing unit, a correcting unit, and a light source driving portion. Magnification correction data is determined using a quadratic function of a variable representing a scanning position with respect to a scanning direction. Coefficients of two quadratic functions corresponding to adjacent two regions included in a plurality of scanning regions are set so that a differential value calculated at the variable corresponding to a boundary of the two regions by a differential of the quadratic function for one region and a differential value calculated at the variable corresponding to the boundary of the two regions by a differential of the quadratic function for the other region are equal to each other.
    Type: Application
    Filed: November 26, 2018
    Publication date: June 6, 2019
    Inventor: Shoji Takeda
  • Patent number: 10243493
    Abstract: A pulse generation unit is configured to output pulse signals for driving the stepping motor. A control unit is configured to perform acceleration control or deceleration control of the stepping motor via the pulse generation unit. The control unit is configured to calculate a number of the pulse signals to be output from the pulse generation unit to the stepping motor when accelerating or decelerating the stepping motor at constant acceleration in the acceleration control or the deceleration control based on an initial speed of the stepping motor when the acceleration control or the deceleration control starts, a target rotation speed, and time from start control of the stepping motor to time when the stepping motor reaches the target rotation speed, and change a rotation speed of the stepping motor in the acceleration control or the deceleration control along a sinusoidal waveform.
    Type: Grant
    Filed: December 5, 2017
    Date of Patent: March 26, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shoji Takeda
  • Patent number: 10158782
    Abstract: Separately providing a shift register for performing serial-to-parallel conversion on a BD signal and a shift register for performing parallel-to-serial conversion on a bit pattern to generate a PWM signal increases the scale of a circuit for adjusting a writing start position in the scanning direction of a light beam. Therefore, the shift register for performing serial-to-parallel conversion on a BD signal and the shift register for performing parallel-to-serial conversion on a bit pattern to generate a PWM signal are configured as a common register.
    Type: Grant
    Filed: May 10, 2017
    Date of Patent: December 18, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shoji Takeda
  • Publication number: 20180278800
    Abstract: An image processing apparatus of the invention, includes: an error value calculation unit configured to calculate an error value in a target pixel from a concentration value in the target pixel of input image data, and a PWM error value calculated on the basis of a light amount of laser light which is actually emitted on the basis of a PWM signal of a pulse width corresponding to the concentration value, and a light amount of ideal laser light corresponding to the pulse width; and a concentration value calculation unit configured to add the error value calculated in peripheral pixels positioned in the vicinity of the target pixel to the concentration value at a predetermined ratio, in which the error value calculation unit sets the error value in the target pixel to 0 according to the concentration value or a pixel position of the target pixel.
    Type: Application
    Filed: March 13, 2018
    Publication date: September 27, 2018
    Inventor: Shoji Takeda
  • Publication number: 20180167006
    Abstract: A pulse generation unit is configured to output pulse signals for driving the stepping motor. A control unit is configured to perform acceleration control or deceleration control of the stepping motor via the pulse generation unit. The control unit is configured to calculate a number of the pulse signals to be output from the pulse generation unit to the stepping motor when accelerating or decelerating the stepping motor at constant acceleration in the acceleration control or the deceleration control based on an initial speed of the stepping motor when the acceleration control or the deceleration control starts, a target rotation speed, and time from start control of the stepping motor to time when the stepping motor reaches the target rotation speed, and change a rotation speed of the stepping motor in the acceleration control or the deceleration control along a sinusoidal waveform.
    Type: Application
    Filed: December 5, 2017
    Publication date: June 14, 2018
    Inventor: Shoji Takeda
  • Patent number: 9983502
    Abstract: A setting unit of a controller mounted on a control board sets a first mode for generating, from image data, PWM data indicating a pattern for causing an LD to emit light and transmitting to a laser driving board, or a second mode for transmitting to the laser driving board image data prior to generation of the PWM data. A data conversion unit, in the first mode, converts inputted image data into N pieces of PWM data respectively corresponding to N LDs, and in the second mode, converts inputted image data into image data for each scanning line. A P/S conversion unit converts data outputted from the data conversion unit from a serial format into a parallel format, and transmits the converted data to the laser driving board as control data.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: May 29, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shoji Takeda, Katsuyuki Yamazaki
  • Patent number: 9935624
    Abstract: A PWM signal generating apparatus configured to generate a PWM signal by applying parallel serial conversion to pattern data obtained by converting input data into a waveform pattern of a PWM signal having one pulse divided into a predetermined number of pulses, the PWM signal generating apparatus including: a clock generating circuit configured to generate a plurality of clock signals having mutually different phases; a conversion circuit configured to convert the input data into the waveform pattern of the PWM signal; an encoding circuit configured to generate, from the waveform pattern, a plurality of encoded signals synchronized with respective clocks of the plurality of clock signals generated by the clock generating circuit; and a decoding circuit configured to generate the PWM signal from the plurality of encoded signals output from the encoding circuit.
    Type: Grant
    Filed: July 22, 2016
    Date of Patent: April 3, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventor: Shoji Takeda
  • Publication number: 20170331973
    Abstract: Separately providing a shift register for performing serial-to-parallel conversion on a BD signal and a shift register for performing parallel-to-serial conversion on a bit pattern to generate a PWM signal increases the scale of a circuit for adjusting a writing start position in the scanning direction of a light beam. Therefore, the shift register for performing serial-to-parallel conversion on a BD signal and the shift register for performing parallel-to-serial conversion on a bit pattern to generate a PWM signal are configured as a common register.
    Type: Application
    Filed: May 10, 2017
    Publication date: November 16, 2017
    Inventor: Shoji Takeda
  • Publication number: 20170146923
    Abstract: A setting unit of a controller mounted on a control board sets a first mode for generating, from image data, PWM data indicating a pattern for causing an LD to emit light and transmitting to a laser driving board, or a second mode for transmitting to the laser driving board image data prior to generation of the PWM data. A data conversion unit, in the first mode, converts inputted image data into N pieces of PWM data respectively corresponding to N LDs, and in the second mode, converts inputted image data into image data for each scanning line. A P/S conversion unit converts data outputted from the data conversion unit from a serial format into a parallel format, and transmits the converted data to the laser driving board as control data.
    Type: Application
    Filed: November 10, 2016
    Publication date: May 25, 2017
    Inventors: Shoji Takeda, Katsuyuki Yamazaki
  • Publication number: 20170040989
    Abstract: A PWM signal generating apparatus configured to generate a PWM signal by applying parallel serial conversion to pattern data obtained by converting input data into a waveform pattern of a PWM signal having one pulse divided into a predetermined number of pulses, the PWM signal generating apparatus including: a clock generating circuit configured to generate a plurality of clock signals having mutually different phases; a conversion circuit configured to convert the input data into the waveform pattern of the PWM signal; an encoding circuit configured to generate, from the waveform pattern, a plurality of encoded signals synchronized with respective clocks of the plurality of clock signals generated by the clock generating circuit; and a decoding circuit configured to generate the PWM signal from the plurality of encoded signals output from the encoding circuit.
    Type: Application
    Filed: July 22, 2016
    Publication date: February 9, 2017
    Inventor: Shoji Takeda
  • Patent number: 8892932
    Abstract: The present image forming apparatus includes a first control unit and a second control unit driven by built-in clock oscillators to realize the distributed control. The first control unit generates, using a first timer driven by the built-in clock oscillator of the first control unit, a pulse signal corresponding to a predetermined clock rate and outputs the pulse signal to the second control unit. The second control unit measures, using a second timer driven by the built-in clock oscillator of the second control unit, a pulse width of the pulse signal outputted from the first control unit, and calculates a correction coefficient using reference pulse width corresponding to the predetermined clock rate and the measured pulse width. The processing unit processes using the calculated correction coefficient.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: November 18, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keita Takahashi, Atsushi Otani, Shoji Takeda, Satoru Yamamoto, Hirotaka Seki
  • Patent number: 8804154
    Abstract: This invention provides an image forming apparatus to which a distributed control system is applied and which improves error detection accuracy in each control unit. To accomplish this, the image forming apparatus includes a master control unit which controls the overall image forming apparatus, a plurality of sub-master control units which control a plurality of functions required to implement image formation, and a plurality of slave control units which control loads required to implement the plurality of functions. Each slave control unit includes a monitoring unit which monitors the operation of the other active slave control unit and performs an error diagnosis when the slave control unit is inactive.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: August 12, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Atsushi Otani, Akihiko Sakai, Keita Takahashi, Hirotaka Seki, Shoji Takeda, Satoru Yamamoto, Shigeo Hata
  • Patent number: 8615675
    Abstract: This invention provides an image forming apparatus that suppresses a control error between CPUs when the CPUs operate in cooperation with each other in distributed control by the CPUs. To accomplish this, the image forming apparatus utilizes a distributed control system. Respective CPUs measure time interval concerning image formation processing using their built-in clock oscillators, and perform operations in cooperation with each other. Correction coefficients are calculated based on the time interval measured by the respective CPUs to correct a measurement error generated by the operation an error of the respective clock oscillators. Clock count values each indicating a timing to drive a load is corrected based on the correction coefficients.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: December 24, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirotaka Seki, Atsushi Otani, Shoji Takeda, Satoru Yamamoto, Keita Takahashi
  • Patent number: 8605306
    Abstract: The image forming apparatus has the plurality of control units and executes distributed processing in which any one control unit having monitoring execution authority monitors for an abnormal condition in each control unit. Each control unit determines, from its own processing load, monitoring capability information that indicates whether monitoring for an abnormal condition is possible or not. If, in a case where the control unit has the monitoring execution authority, the monitoring capability information does not satisfy predetermined information, then the control unit delegates the monitoring execution authority to another control unit whose monitoring capability information does satisfy the predetermined information.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: December 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keita Takahashi, Atsushi Otani, Shoji Takeda, Satoru Yamamoto, Hirotaka Seki
  • Patent number: 8576427
    Abstract: There are provided an image forming apparatus which implements divisional control using a plurality of control units without an increase in cost and a control method for the apparatus. To accomplish this, this image forming apparatus includes a master control unit that controls the overall image forming apparatus, a plurality of sub-master control units that control a plurality of functions for performing image formation, and a plurality of salve control units that control loads for implementing a plurality of functions. The master control unit is connected to the plurality of sub-master control units via first signal lines. The plurality of sub-master control units are connected to the plurality of slave control units via second signal lines higher in data transfer timing accuracy than the first signal lines.
    Type: Grant
    Filed: February 25, 2010
    Date of Patent: November 5, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akihiko Sakai, Atsushi Otani, Shigeo Hata, Shoji Takeda, Satoru Yamamoto, Keita Takahashi, Hirotaka Seki