Patents by Inventor Kazuki Ohshitanai

Kazuki Ohshitanai 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: 9596425
    Abstract: The present invention provides a driving method for an image pickup apparatus that appropriately performs both readout of a signal of a reference pixel and mixing of mutual signals output by a plurality of effective pixels, and the present invention also provides an image pickup apparatus and an image pickup system.
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: March 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Kazuki Ohshitanai, Hiroo Akabori, Takeshi Akiyama, Yoshiaki Takada, Masaaki Iwane, Koichiro Iwata, Hiroyuki Morita, Hideo Kobayashi
  • Patent number: 9554068
    Abstract: A solid-state imaging apparatus is provided. The apparatus may include a plurality of pixels each including a first photoelectric conversion element and a second photoelectric conversion element, a processing circuit configured to perform a first process for generating a first signal corresponding to a charge generated by the first photoelectric conversion element, and a second process for generating a second signal corresponding to a sum of the charge generated by the first photoelectric conversion element and a charge generated by the second photoelectric conversion element, and a current source configured to supply a first driving current to the processing circuit when the processing circuit performs the first process, and supply a second driving current higher than the first driving current to the processing circuit when the processing circuit performs the second.
    Type: Grant
    Filed: November 21, 2014
    Date of Patent: January 24, 2017
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuki Ohshitanai
  • Publication number: 20160316156
    Abstract: A solid-state image sensor has a pixel array and a processor configured to process a signal from the pixel array, the pixel array including a light-receiving pixel having first and second photoelectric converters and a light-shielded pixel having third and fourth photoelectric converters. The processor outputs (a) a pixel signal corresponding to charges of the first photoelectric converter, (b) an added pixel signal corresponding to a sum of charges of the first photoelectric converter and charges of the second photoelectric converter, and (c) an added reference signal corresponding to a sum of charges of the third photoelectric converter and charges of the fourth photoelectric converter, and does not output (d) a reference signal corresponding to charges of the third photoelectric converter and a reference signal corresponding to charges of the fourth photoelectric converter.
    Type: Application
    Filed: July 1, 2016
    Publication date: October 27, 2016
    Inventor: Kazuki Ohshitanai
  • Patent number: 9473724
    Abstract: There is provided an imaging device. In the imaging device, when a range of the signal amplitude available for a signal output from a pixel cell is small, a period, in which a signal in a buffer unit is output, is set shorter than that when the range is large.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 18, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Masaaki Iwane, Kazuki Ohshitanai, Akira Okita
  • Publication number: 20160286148
    Abstract: In a photoelectric conversion apparatus, the number of differential transistors in which ON states thereof overlap with one another is increased when the number of the amplification transistors in which ON states thereof overlap with one another is increased.
    Type: Application
    Filed: March 25, 2016
    Publication date: September 29, 2016
    Inventors: Kazuki Ohshitanai, Yasuji Ikeda
  • Patent number: 9426391
    Abstract: Provided is a solid-state imaging apparatus, including: a pixel array including: a first, a second, and a third non-effective pixel rows each including a non-effective pixel configured to output a signal that is independent of an amount of incident light; and a second pixel region having effective pixel rows each including an aperture pixel configured to output a signal that is dependent on an amount of incident light; and a mixing portion configured to: mix a signal output from the non-effective pixel in the first non-effective pixel row and a signal output from the non-effective pixel in the second non-effective pixel row; mix the signal output from the non-effective pixel in the first non-effective pixel row and a signal output from the non-effective pixel in the third non-effective pixel row; and mix signals together, which are output from the aperture pixels in the effective pixel rows.
    Type: Grant
    Filed: April 10, 2015
    Date of Patent: August 23, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yoshiaki Takada, Kazuki Ohshitanai
  • Patent number: 9426398
    Abstract: A solid-state image sensor has a pixel array and a processor configured to process a signal from the pixel array, the pixel array including a light-receiving pixel having first and second photoelectric converters and a light-shielded pixel having third and fourth photoelectric converters. The processor outputs (a) a pixel signal corresponding to charges of the first photoelectric converter, (b) an added pixel signal corresponding to a sum of charges of the first photoelectric converter and charges of the second photoelectric converter, and (c) an added reference signal corresponding to a sum of charges of the third photoelectric converter and charges of the fourth photoelectric converter, and does not output (d) a reference signal corresponding to charges of the third photoelectric converter and a reference signal corresponding to charges of the fourth photoelectric converter.
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: August 23, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazuki Ohshitanai
  • Publication number: 20160173799
    Abstract: A pixel portion includes a plurality of first pixel rows and a plurality of second pixel rows each being arranged so as to be adjacent to the first pixel row. Among the first pixel row and the second pixel row arranged so as to be adjacent to each other, during at least a part of a period from an end of the electric charge accumulation period in the second pixel row until an end of an output period in which signals from pixels in the first pixel row are output, electric charges accumulated in photoelectric conversion units of pixels in the second pixel row are reset.
    Type: Application
    Filed: December 10, 2015
    Publication date: June 16, 2016
    Inventors: Hiroo Akabori, Koichiro Iwata, Hiroyuki Morita, Shinichiro Shimizu, Daisuke Inoue, Kazuki Ohshitanai
  • Patent number: 9368668
    Abstract: A method comprises preparing a semiconductor substrate having a first portion, and a second portion including a first region and a second region; forming an active region in the first portion, and an isolating portion of an insulator defining the active region in the second portion; forming a first semiconductor region of a first conductivity type configuring a first photoelectric conversion element, a second semiconductor region of first conductivity type configuring a second photoelectric conversion element, a third semiconductor region of first conductivity type, a fourth semiconductor region of the conductivity type, a first gate electrode configuring a first transfer transistor, and a second gate electrode configuring a second transfer; exposing the first region of the semiconductor substrate, and performing ion implantation masked by a first photoresist pattern covering the second region of the semiconductor substrate, thus forming a fifth semiconductor region of a second conductivity type.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: June 14, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Tazoe, Yu Arishima, Akira Okita, Kazuki Ohshitanai, Yasuharu Ota
  • Patent number: 9305946
    Abstract: A photoelectric conversion apparatus includes a plurality of pixels arranged in a matrix, a plurality of signal processing units each corresponding to a column of the matrix, and a signal line. Each of the plurality of signal processing units includes a first capacitance and a second capacitance that hold a signal, a switch provided between the signal line and the first capacitance, a capacitance adjustment unit electrically connected to the second capacitance, and a connection unit configured to electrically connect the first capacitance provided to one of signal processing units to the second capacitance provided to another one of the signal processing units.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: April 5, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Tatsuya Ryoki, Kazuki Ohshitanai
  • Publication number: 20160064442
    Abstract: Provided is a solid-state image pickup apparatus, including: a pixel region, in which a plurality of pixels each including an amplifier transistor are arranged two-dimensionally in rows and columns, and which includes an n-row signal mixing region in which outputs of n amplifier transistors are mixed, where n is a natural number of 1 or more, and an m-row signal mixing region in which outputs of m amplifier transistors are mixed, where m>n; a column signal line to which a voltage from the amplifier transistor is output; and a clipping circuit, which is configured to clip a voltage in the column signal line, and is arranged at a position that is closer to the n-row signal mixing region than to the m-row signal mixing region.
    Type: Application
    Filed: August 25, 2015
    Publication date: March 3, 2016
    Inventors: Yoshiaki Takada, Masaaki Iwane, Kazuki Ohshitanai
  • Patent number: 9232164
    Abstract: An image sensor includes a pixel unit having first and second photoelectric converters, an amplifier provided commonly for the first and second photoelectric converters, first and second transfer transistors configured to respectively transfer charges generated in the first and second electric converters to an input portion of the amplifier. The signal read out by the readout portion includes a first optical signal read out in a state in which charges are transferred from the first photoelectric converter to the input portion by the first transfer transistor, and a second optical signal read out, after the readout of the first optical signal, in a state in which charges are transferred from the second photoelectric converter to the input portion by the second transfer transistor.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: January 5, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaaki Minowa, Akira Okita, Yu Arishima, Masaaki Iwane, Kazuki Ohshitanai
  • Patent number: 9196645
    Abstract: A photoelectric conversion device includes: a first semiconductor region of a first conductivity type, which configures a first photoelectric conversion element; a second semiconductor region of the first conductivity type, which configures a second photoelectric conversion element; a third semiconductor region of the first conductivity type; a fourth semiconductor region of the first conductivity type; a first gate electrode, configuring a first transfer transistor conjointly; and a second gate electrode, configuring a second transfer transistor. At a side of the first gate electrode which is toward the first semiconductor region in plan view of the surface of the semiconductor substrate, a length of the side of the first gate electrode toward the first semiconductor region, is shorter than a length of the active region, and a length of the side of the first gate electrode toward the first semiconductor region, is longer than a length of the first semiconductor region.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: November 24, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Tazoe, Yu Arishima, Akira Okita, Kazuki Ohshitanai, Yasuharu Ota
  • Publication number: 20150319388
    Abstract: The present invention provides a driving method for an image pickup apparatus that appropriately performs both readout of a signal of a reference pixel and mixing of mutual signals output by a plurality of effective pixels, and the present invention also provides an image pickup apparatus and an image pickup system.
    Type: Application
    Filed: April 30, 2015
    Publication date: November 5, 2015
    Inventors: Kazuki Ohshitanai, Hiroo Akabori, Takeshi Akiyama, Yoshiaki Takada, Masaaki Iwane, Koichiro Iwata, Hiroyuki Morita, Hideo Kobayashi
  • Publication number: 20150319381
    Abstract: Provided is a solid-state imaging apparatus, including: a pixel array including: a first, a second, and a third non-effective pixel rows each including a non-effective pixel configured to output a signal that is independent of an amount of incident light; and a second pixel region having effective pixel rows each including an aperture pixel configured to output a signal that is dependent on an amount of incident light; and a mixing portion configured to: mix a signal output from the non-effective pixel in the first non-effective pixel row and a signal output from the non-effective pixel in the second non-effective pixel row; mix the signal output from the non-effective pixel in the first non-effective pixel row and a signal output from the non-effective pixel in the third non-effective pixel row; and mix signals together, which are output from the aperture pixels in the effective pixel rows.
    Type: Application
    Filed: April 10, 2015
    Publication date: November 5, 2015
    Inventors: Yoshiaki Takada, Kazuki Ohshitanai
  • Publication number: 20150281610
    Abstract: Provided is a solid-state imaging apparatus, including: a plurality of photoelectric conversion elements each configured to generate charges by photoelectric conversion; and a plurality of transfer transistors, which are connected to the plurality of photoelectric conversion elements, respectively, each configured to transfer the generated charges to the same floating diffusion, in which the plurality of transfer transistors are each configured to be on/off controlled based on a voltage input to a gate terminal thereof, and a length of a period during which the voltage input to the gate terminal changes when a corresponding one of the plurality of transfer transistors is switched from on to off varies from one transfer transistor to another.
    Type: Application
    Filed: March 24, 2015
    Publication date: October 1, 2015
    Inventors: Yasuharu Ota, Kazuki Ohshitanai, Yu Arishima
  • Publication number: 20150264289
    Abstract: A semiconductor apparatus, comprising a decoder arranged in a path between a first power supply line and a second power supply line and configured to receive a signal and decode the signal, a switch portion arranged, in series with the decoder, in the path between the first power supply line and the second power supply line, and a control unit configured to set the switch portion in a conductive state so as to cause the decoder to decode the signal after the signal has changed from one of high level and low level to the other.
    Type: Application
    Filed: March 2, 2015
    Publication date: September 17, 2015
    Inventors: Koichiro Iwata, Kazuki Ohshitanai, Hiroo Akabori, Takeshi Akiyama, Hiroyuki Morita
  • Patent number: 9117718
    Abstract: A solid-state image sensor includes a plurality of pixels for focus detection by a phase difference detection scheme. The pixel includes a semiconductor region provided therein with a plurality of photoelectric converters configured so that signals therefrom are independently read out, a microlens, and a lens surface arranged between the microlens and the semiconductor region, wherein the lens surface exerts a negative power on light which passes through the microlens toward the semiconductor region.
    Type: Grant
    Filed: January 19, 2012
    Date of Patent: August 25, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuki Ohshitanai, Yuichiro Yamashita
  • Publication number: 20150215555
    Abstract: There is provided an imaging device. In the imaging device, when a range of the signal amplitude available for a signal output from a pixel cell is small, a period, in which a signal in a buffer unit is output, is set shorter than that when the range is large.
    Type: Application
    Filed: January 27, 2015
    Publication date: July 30, 2015
    Inventors: Masaaki Iwane, Kazuki Ohshitanai, Akira Okita
  • Publication number: 20150163426
    Abstract: A solid-state imaging apparatus is provided. The apparatus may include a plurality of pixels each including a first photoelectric conversion element and a second photoelectric conversion element, a processing circuit configured to perform a first process for generating a first signal corresponding to a charge generated by the first photoelectric conversion element, and a second process for generating a second signal corresponding to a sum of the charge generated by the first photoelectric conversion element and a charge generated by the second photoelectric conversion element, and a current source configured to supply a first driving current to the processing circuit when the processing circuit performs the first process, and supply a second driving current higher than the first driving current to the processing circuit when the processing circuit performs the second.
    Type: Application
    Filed: November 21, 2014
    Publication date: June 11, 2015
    Inventor: Kazuki Ohshitanai