Patents by Inventor Toru Koizumi

Toru Koizumi 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: 9083901
    Abstract: A solid-state image pickup device comprises for each pixel a photoelectric converter PD, an input terminal FD of a signal amplifier and a transfer switch TX for transferring an optical signal from the photoelectric converter to the input terminal. The device additionally comprises means for resetting the photoelectric converter by opening the transfer switch TX under a condition of holding the voltage of the input terminal FD to a fixed high level before storing the optical signal in the photoelectric converter PD. With this arrangement, any residual electric charge in the photoelectric converter can be eliminated without paying the cost of reducing the manufacturing yield and degrading the chip performance.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: July 14, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toru Koizumi, Shigetoshi Sugawa, Tetsunobu Kochi
  • Patent number: 9055211
    Abstract: There is provided an image pickup apparatus including a pixel including a photoelectric conversion element and an amplification element for amplifying and outputting a signal generated at the photoelectric conversion element, a load transistor for controlling an electric current flowing at the amplification element, and a potential control element for suppressing potential fluctuation in a first main electrode region of the load transistor which is an output side of the amplification element.
    Type: Grant
    Filed: September 3, 2013
    Date of Patent: June 9, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Katsuhito Sakurai, Toru Koizumi, Hiroki Hiyama
  • Patent number: 9048155
    Abstract: A plurality of photoelectric conversion elements including a first photoelectric conversion element, a second photoelectric conversion element, and a third photoelectric conversion element, are arranged in a photoelectric conversion apparatus of the present invention. Provided, between the first photoelectric conversion element and the second photoelectric conversion element, is a first semiconductor region of a first conductivity type and of a first width in which a signal charge is a minor charier. And, provided, between the first photoelectric conversion element and the third photoelectric conversion element, is a second semiconductor region of the first conductivity type in a higher impurity concentration and of a second width narrower than the first width at a position deeper in a semiconductor substrate rather than a depth of the first semiconductor region.
    Type: Grant
    Filed: December 6, 2012
    Date of Patent: June 2, 2015
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Takashi Matsuda, Toru Koizumi
  • Patent number: 9007501
    Abstract: A solid-state imaging apparatus includes a pixel array in which a plurality of pixels are arranged, wherein the pixel array has a region formed from one of an electrical conductor and a semiconductor to which a fixed electric potential is supplied, each pixel includes a photoelectric converter, a charge-voltage converter which converts charges generated by the photoelectric converter into a voltage, and an amplification unit which amplifies a signal generated by the charge-voltage converter by a positive gain and outputs the amplified signal to an output line, and the output line comprising a shielding portion arranged to shield at least part of the charge-voltage converter with respect to the region.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: April 14, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsuda, Shin Kikuchi, Toru Koizumi
  • Patent number: 9001243
    Abstract: A solid-state imaging apparatus of a dynamic range enlarged by reading out a carrier accumulated in a carrier accumulation unit at a plurality of times during a single carrier accumulation time period.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: April 7, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toru Koizumi
  • Publication number: 20150092095
    Abstract: A solid-state imaging apparatus includes a pixel array in which a plurality of pixels are arranged, wherein the pixel array has a region formed from one of an electrical conductor and a semiconductor to which a fixed electric potential is supplied, each pixel includes a photoelectric converter, a charge-voltage converter which converts charges generated by the photoelectric converter into a voltage, and an amplification unit which amplifies a signal generated by the charge-voltage converter by a positive gain and outputs the amplified signal to an output line, and the output line comprising a shielding portion arranged to shield at least part of the charge-voltage converter with respect to the region.
    Type: Application
    Filed: December 11, 2014
    Publication date: April 2, 2015
    Inventors: Takashi Matsuda, Shin Kikuchi, Toru Koizumi
  • Patent number: 8975676
    Abstract: An object is to provide a solid state image pickup device and a camera which do not worsen a sensor performance in terms of an optical property, a saturated charge amount and the like. A solid state image sensor including a pixel region having a plurality of pixels includes at least a photodiode and an amplifying portion amplifying photocharges outputted from the photodiode in the pixel region, and further includes a well electrode for taking well potential of a well region in which the amplifying portion is arranged. Between the well electrode and the photodiode, no element isolation regions by an insulation film are arranged. Moreover, on the surface of a first semiconductor region in which the photodiode stores the charges, a second semiconductor layer of a conductivity type reverse to that of the first semiconductor region is arranged.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: March 10, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Toru Koizumi
  • Patent number: 8970756
    Abstract: A solid-state imaging apparatus includes a pixel array in which a plurality of pixels are arranged, wherein the pixel array has a region formed from one of an electrical conductor and a semiconductor to which a fixed electric potential is supplied, each pixel includes a photoelectric converter, a charge-voltage converter which converts charges generated by the photoelectric converter into a voltage, and an amplification unit which amplifies a signal generated by the charge-voltage converter by a positive gain and outputs the amplified signal to an output line, and the output line comprising a shielding portion arranged to shield at least part of the charge-voltage converter with respect to the region.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: March 3, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takashi Matsuda, Shin Kikuchi, Toru Koizumi
  • Patent number: 8957364
    Abstract: A photo-electric conversion device comprises a pixel array in which a plurality of pixels are arrayed, each pixel including a photo-electric converter, a floating diffusion portion, a transfer unit which transfers charges generated in the photo-electric converter to the floating diffusion portion, and an output unit which outputs a signal corresponding to a potential of the floating diffusion portion, a signal line which is connected to the plurality of pixels and transmits a signal output from each pixel, a load transistor including a drain connected to the signal line, and a source connected to a first reference potential, and a capacitance including a first electrode connected to a gate of the load transistor, and a second electrode connected to a second reference potential, wherein the signal line is arranged not to overlap the first electrode when viewed from a direction perpendicular to a light-receiving surface of the photo-electric converter.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Ryoki, Seiichirou Sakai, Toru Koizumi
  • Publication number: 20150009389
    Abstract: A photo-electric conversion device comprises a pixel array in which a plurality of pixels are arrayed, each pixel including a photo-electric converter, a floating diffusion portion, a transfer unit which transfers charges generated in the photo-electric converter to the floating diffusion portion, and an output unit which outputs a signal corresponding to a potential of the floating diffusion portion, a signal line which is connected to the plurality of pixels and transmits a signal output from each pixel, a load transistor including a drain connected to the signal line, and a source connected to a first reference potential, and a capacitance including a first electrode connected to a gate of the load transistor, and a second electrode connected to a second reference potential, wherein the signal line is arranged not to overlap the first electrode when viewed from a direction perpendicular to a light-receiving surface of the photo-electric converter.
    Type: Application
    Filed: September 25, 2014
    Publication date: January 8, 2015
    Inventors: Tatsuya Ryoki, Seiichirou Sakai, Toru Koizumi
  • Publication number: 20150008494
    Abstract: At least one exemplary embodiment is directed to a solid state image sensor including at least one antireflective layer and/or non rectangular shaped wiring layer cross section to reduce dark currents and 1/f noise.
    Type: Application
    Filed: September 24, 2014
    Publication date: January 8, 2015
    Inventors: Toru Koizumi, Akira Okita, Tetsuya Itano, Sakae Hashimoto, Ryuichi Mishima
  • Patent number: 8928790
    Abstract: Provided is a solid-state imaging apparatus that is capable of preventing a harmful influence due to noise generated in a control line. The solid-state imaging apparatus includes: a plurality of pixels each including a photoelectric conversion unit for photoelectric converting to generate a signal; control lines for supplying control signals for driving the pixels; driving buffers for driving the control lines; and switching units for switching between a first path for supplying power source voltages from power source circuits to power source terminals of the driving buffers and a second path for supplying power source voltages from capacitors to the power source terminals of the driving buffers.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 6, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masanori Ogura, Toru Koizumi
  • Patent number: 8896029
    Abstract: A solid state image pickup device which can prevent color mixture by using a layout of a capacitor region provided separately from a floating diffusion region and a camera using such a device are provided. A photodiode region is a rectangular region including a photodiode. A capacitor region includes a carrier holding unit and is arranged on one side of the rectangle of the photodiode region as a region having a side longer than the one side. In a MOS unit region, an output unit region including an output unit having a side longer than the other side which crosses the one side of the rectangle of the photodiode region is arranged on the other side. A gate region and the FD region are arranged between the photodiode region and the capacitor region.
    Type: Grant
    Filed: January 29, 2013
    Date of Patent: November 25, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Koizumi, Akira Okita, Masanori Ogura, Shin Kikuchi, Tetsuya Itano
  • Patent number: 8883526
    Abstract: An image pickup device, wherein a part of the carriers overflowing from the photoelectric conversion unit for a period of photoelectrically generating and accumulating the carriers may be flowed into the floating diffusion region, and a pixel signal generating unit generating a pixel signal according to the carriers stored in the photoelectric conversion unit and the carriers having overflowed into the floating diffusion region, is provided. The expansion of a dynamic range and the improvement of an image quality can be provided by controlling a ratio of the carriers flowing into the floating diffusion region to the carriers overflowing from such a photoelectric conversion unit at high accuracy.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: November 11, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Okita, Toru Koizumi, Isamu Ueno, Katsuhito Sakurai
  • Patent number: 8878268
    Abstract: At least one exemplary embodiment is directed to a solid state image sensor including at least one antireflective layer and/or non rectangular shaped wiring layer cross section to reduce dark currents and 1/f noise.
    Type: Grant
    Filed: October 30, 2013
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Koizumi, Akira Okita, Tetsuya Itano, Sakae Hashimoto, Ryuichi Mishima
  • Patent number: 8878971
    Abstract: An image sensing apparatus comprises: an output unit which includes an output line group, a plurality of difference circuits, a first dummy line, and a second dummy line, and wherein the output line group is interposed between the first dummy line and the second dummy line, a readout unit includes a plurality of memory circuits, each of the plurality of memory circuits includes a first holding capacitance and a second holding capacitance, a gain determined by a ratio of a capacitance value of the first holding capacitance and a capacitance value of a first output line is applied to the first signal output to the first output line, and a gain determined by a ratio of a capacitance value of the second holding capacitance and a capacitance value of a second output line is applied to the second signal output to the second output line.
    Type: Grant
    Filed: January 24, 2012
    Date of Patent: November 4, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Ryoki, Toru Koizumi
  • Patent number: 8872092
    Abstract: A photo-electric conversion device comprises a pixel array in which a plurality of pixels, each including a photo-electric converter, are arrayed to form rows and columns; signal lines respectively corresponding to the columns of the pixel array; load transistors respectively corresponding to the signal lines; and capacitances respectively corresponding to the load transistors. Each signal line is connected to the pixels of the corresponding column. Each capacitance includes a first electrode and a second electrode. When viewed from a direction perpendicular to a light-receiving surface of the photo-electric converter, the first electrode is arranged within a region which is surrounded by (i) the adjacent signal lines which are arranged closest to each other, (ii) the pixel array, and (iii) a virtual line connecting end portions of the adjacent signal lines, so as to not overlap the adjacent signal lines.
    Type: Grant
    Filed: April 12, 2010
    Date of Patent: October 28, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tatsuya Ryoki, Seiichirou Sakai, Toru Koizumi
  • Patent number: 8797435
    Abstract: A signal reading apparatus includes first and second common signal lines from which a signal from a signal generation unit is output and first and second amplifier circuits and a switch configured to control a conductive state of the first and the second common signal lines. The signal reading apparatus includes a first signal reading method of reading a signal from the first common signal line after being amplified in the first amplifier circuit and reading a signal from the second common signal line after being amplified in the second amplifier circuit and a second signal reading method of turning ON the switch to read the signal from the first common signal line and the signal from the second common signal line individually after being amplified in the first amplifier circuit. The signal reading apparatus includes a control unit for controlling between the first and second signal reading methods.
    Type: Grant
    Filed: April 19, 2011
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toru Koizumi, Hideaki Takada
  • Patent number: 8796609
    Abstract: A photoelectric conversion apparatus of the present invention includes: a plurality of photoelectric conversion elements arranged on a substrate; a transistor for transferring a signal charge; and a plurality of transistors for reading out the signal charge transferred. The plurality of photoelectric conversion elements include a first photoelectric conversion element and a second photoelectric conversion element adjacent to each other. The photoelectric conversion apparatus of the present invention includes: a first semiconductor region having a first conductivity type arranged between the first photoelectric conversion element and the second photoelectric conversion element; and a second semiconductor region having the first conductivity type that is arranged on a region where the plurality of transistors are arranged and that has a width larger than that of the first semiconductor region of the first conductivity type.
    Type: Grant
    Filed: May 15, 2013
    Date of Patent: August 5, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yu Arishima, Yasuhiro Kawabata, Hideaki Takada, Seiichirou Sakai, Toru Koizumi
  • Publication number: 20140192241
    Abstract: A solid-state imaging apparatus of a dynamic range enlarged by reading out a carrier accumulated in a carrier accumulation unit at a plurality of times during a single carrier accumulation time period.
    Type: Application
    Filed: March 21, 2014
    Publication date: July 10, 2014
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Toru Koizumi