Patents by Inventor Kunihiko Iizuka

Kunihiko Iizuka 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: 10209374
    Abstract: A detectable range for an output signal corresponding to charge stored at a pixel is widened in a radiation detector based on an APS method. A resistor (42) is connected to a region between a pixel (12) and a signal readout circuit (21) in a signal output line (51). The resistor (42) is set so as to draw, from the signal output line (51), a current approximately equivalent to a bias current which flows to an amplifier transistor (16) when no charge is stored in a charge storage part (14).
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: February 19, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kunihiko Iizuka, Katsuhisa Kashiwagi, Shigenari Taguchi
  • Publication number: 20190041348
    Abstract: A change in an imaginary part of a complex dielectric constant of an inspection object containing moisture is detected as a change in an oscillation frequency. A sensor device includes an oscillation unit that is formed in a semiconductor integrated circuit and an oscillation frequency detection unit that detects an oscillation frequency of the oscillation unit. The oscillation unit has capacitors that are connected to an inspection object in series and changes the oscillation frequency in accordance with a complex dielectric constant of the inspection object.
    Type: Application
    Filed: January 24, 2017
    Publication date: February 7, 2019
    Inventors: NOBUYUKI ASHIDA, KUNIHIKO IIZUKA, AKIRA SAITO, TAKESHI MITSUNAKA
  • Publication number: 20190025235
    Abstract: Provided is a technology for detecting a change in an inspection target containing moisture. A sensor circuit (1) for inspecting property of an inspection target includes an oscillator (20) having a resonance frequency of 30 to 200 GHz, and a detection circuit (3) that estimates an oscillation frequency of the oscillator.
    Type: Application
    Filed: June 2, 2016
    Publication date: January 24, 2019
    Inventors: TAKESHI MITSUNAKA, AKIRA SAITO, NOBUYUKI ASHIDA, KUNIHIKO IIZUKA
  • Patent number: 10180501
    Abstract: A radiation detector (radiation sensor 1) includes a sensor element (3) and an amplifying transistor (5), reads a current value that flows between the drain and the source based on a change in voltage of a gate electrode of the amplifying transistor (5), and also includes a reset reading circuit (10) that includes an amplifier (11) and reads the current value, and the reset reading circuit (10) outputs an initial voltage to the gate electrode so that the current value becomes a value that is determined in advance.
    Type: Grant
    Filed: September 7, 2015
    Date of Patent: January 15, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kunihiko Iizuka, Shigenari Taguchi
  • Patent number: 10165999
    Abstract: Improvement of a frame rate and suppression of power consumption are intended. A radiological-image acquisition device (100) includes a plurality of pixels, a capacitive element (1a) that accumulates electric charge corresponding to a dose (X) of radiation, and a read control unit (read element control unit 22, reset element control unit 23) that reads, from at least one pixel (active pixel 10) that is not subjected to initialization in two or more frames, an output (output voltage Vout) corresponding to the electric charge.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: January 1, 2019
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kunihiko Iizuka, Shigenari Taguchi, Katsuhisa Kashiwagi
  • Publication number: 20180356360
    Abstract: To detect changes in the physical properties of an examination object as changes in a plurality of different oscillation frequencies using signals with the oscillation frequencies, a sensor circuit includes: an oscillation circuit (1) with a first resonant frequency; an oscillation circuit (2) with a second resonant frequency different from the first resonant frequency; and a detection circuit (4) that detects oscillation frequencies of the oscillation circuit (1) and the oscillation circuit (2).
    Type: Application
    Filed: September 21, 2016
    Publication date: December 13, 2018
    Inventors: TAKESHI MITSUNAKA, KUNIHIKO IIZUKA, AKIRA SAITO, NOBUYUKI ASHIDA
  • Publication number: 20180249976
    Abstract: Improvement of a frame rate and suppression of power consumption are intended. A radiological-image acquisition device (100) includes a plurality of pixels, a capacitive element (1a) that accumulates electric charge corresponding to a dose (X) of radiation, and a read control unit (read element control unit 22, reset element control unit 23) that reads, from at least one pixel (active pixel 10) that is not subjected to initialization in two or more frames, an output (output voltage Vout) corresponding to the electric charge.
    Type: Application
    Filed: March 10, 2016
    Publication date: September 6, 2018
    Inventors: KUNIHIKO IIZUKA, SHIGENARI TAGUCHI, KATSUHISA KASHIWAGI
  • Publication number: 20180209937
    Abstract: An integrated circuit sensor that enables, regardless of a type of an inspection object, the inspection object and a front surface of the integrated circuit sensor to be in reliable contact with each other in a large region is provided. A through silicon via (11) that electrically connects an inside of an integrated circuit sensor (4) and an outside of the integrated circuit sensor (4) is formed in the inside of the integrated circuit sensor (4) so as to reach a rear surface of the integrated circuit sensor (4), which faces the front surface of the integrated circuit sensor (4).
    Type: Application
    Filed: June 10, 2016
    Publication date: July 26, 2018
    Inventors: KUNIHIKO IIZUKA, AKIRA SAITO, TAKESHI MITSUNAKA, NOBUYUKI ASHIDA
  • Publication number: 20180203137
    Abstract: A detectable range for an output signal corresponding to charge stored at a pixel is widened in a radiation detector based on an APS method. A resistor (42) is connected to a region between a pixel (12) and a signal readout circuit (21) in a signal output line (51). The resistor (42) is set so as to draw, from the signal output line (51), a current approximately equivalent to a bias current which flows to an amplifier transistor (16) when no charge is stored in a charge storage part (14).
    Type: Application
    Filed: June 9, 2016
    Publication date: July 19, 2018
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: KUNIHIKO IIZUKA, KATSUHISA KASHIWAGI, SHIGENARI TAGUCHI
  • Patent number: 9898136
    Abstract: A capacitance distribution detection circuit includes a multiplexer, a driver, and a sense amplifier, and the multiplexer switches states between a first connection state in which first signal lines are connected to the driver and second signal lines are connected to the sense amplifier, and a second connection state in which the first signal lines are connected to the sense amplifier and the second signal lines are connected to the driver.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: February 20, 2018
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka
  • Publication number: 20170307764
    Abstract: A radiation detector (radiation sensor 1) includes a sensor element (3) and an amplifying transistor (5), reads a current value that flows between the drain and the source based on a change in voltage of a gate electrode of the amplifying transistor (5), and also includes a reset reading circuit (10) that includes an amplifier (11) and reads the current value, and the reset reading circuit (10) outputs an initial voltage to the gate electrode so that the current value becomes a value that is determined in advance.
    Type: Application
    Filed: September 7, 2015
    Publication date: October 26, 2017
    Inventors: Kunihiko IIZUKA, Shigenari TAGUCHI
  • Publication number: 20160349923
    Abstract: A capacitance distribution detection circuit (2) includes a multiplexer (4), a driver (5), and a sense amplifier (6), and the multiplexer (4) switches states between a first connection state in which first signal lines (HL1 to HLM) are connected to the driver (5) and second signal lines (VL1 to VLM) are connected to the sense amplifier (6), and a second connection state in which the first signal lines (HL1 to HLM) are connected to the sense amplifier (6) and the second signal lines (VL1 to VLM) are connected to the driver (5).
    Type: Application
    Filed: August 12, 2016
    Publication date: December 1, 2016
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Masayuki MIYAMOTO, Kunihiko IIZUKA
  • Patent number: 9454271
    Abstract: A capacitance distribution detection circuit (2) includes a multiplexer (4), a driver (5), and a sense amplifier (6), and the multiplexer (4) switches states between a first connection state in which first signal lines (HL1 to HLM) are connected to the driver (5) and second signal lines (VL1 to VLM) are connected to the sense amplifier (6), and a second connection state in which the first signal lines (HL1 to HLM) are connected to the sense amplifier (6) and the second signal lines (VL1 to VLM) are connected to the driver (5).
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: September 27, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka
  • Patent number: 9395856
    Abstract: A touch panel controller (3) capable of accurately detecting a change in capacitance includes: a driving section (4) which drives capacitors (C1 through CM) in parallel in accordance with N M-dimensional vectors; and an estimating section (5) which obtains linear sums of the capacitors (C1 through CM) in accordance with the driving in parallel and estimates values of the capacitors (C1 through CM) based on an inner product operation carried out with respect to (i) the linear sums of the capacitors (C1 through CM) and (ii) the N M-dimensional vectors, the driving section (4) driving the capacitors (C1 through CM) in parallel in a first order of the N M-dimensional vectors, the estimating section (5) estimating a first estimated value of the capacitors (C1 through CM) in accordance with the driving in parallel in the first order, the driving section (4) driving the capacitors (C1 through CM) in parallel in a second order of the N M-dimensional vectors, the estimating section (5) estimating a second estimated va
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: July 19, 2016
    Assignee: Sharp Kabushiki Kaishi
    Inventor: Kunihiko Iizuka
  • Patent number: 8976154
    Abstract: A touch panel system (71a) includes a capacitance value distribution detection circuit (72). The capacitance value distribution detection circuit (72) switches a connection state between a first connection state and a second connection state, which first connection state makes first signal lines (HL1 to HLM) serve as drive lines (DL1 to DLM) and second signal lines (VL1 to VLM) serve as sense lines (SL1 to SLM), and which second connection state makes the second signal lines (VL1 to VLM) serve as the drive lines (DL1 to DLM) and the first signal lines (HL1 to HLM) serve as the sense lines (SL1 to SLM).
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: March 10, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka, Manabu Yumoto, Shinichi Yoshida, Kengo Takahama
  • Patent number: 8942937
    Abstract: A capacitance distribution detection circuit includes a multiplexer, a driver, and a sense amplifier. The multiplexer switches states between a first connection state and a second connection state. The first connection state drives first signal lines in parallel so that voltages are applied, outputs, along second signal lines, a linear sum of electric charges stored in capacitors corresponding to that respective one of the second signal lines, and estimates, a capacitance of capacitors formed along that second signal line. The second connection state drives, the second signal lines in parallel so that voltages are applied, outputs, along the first signal lines, a linear sum of electric charges stored in the capacitors corresponding to that respective one of the first signal lines, and estimates, a capacitance of the capacitors formed along that first signal line.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: January 27, 2015
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka
  • Publication number: 20140149059
    Abstract: A capacitance distribution detection circuit (102) includes a multiplexer (104), a driver (105), and a sense amplifier (106), and the multiplexer (104) switches states between a first connection state in which first signal lines (HL1 to HLM) are connected to the driver (105) and second signal lines (VL1 to VLM) are connected to the sense amplifier (106), and a second connection state in which the first signal lines (HL1 to HLM) are connected to the sense amplifier (106) and the second signal lines (VL1 to VLM) are connected to the driver (105). The first connection state (A) (a) drives, on the basis of code sequences (di (=di1, di2, . . . , diN, where i=1, . . .
    Type: Application
    Filed: May 22, 2012
    Publication date: May 29, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka
  • Publication number: 20140139483
    Abstract: A capacitance distribution detection circuit (2) includes a multiplexer (4), a driver (5), and a sense amplifier (6), and the multiplexer (4) switches states between a first connection state in which first signal lines (HL1 to HLM) are connected to the driver (5) and second signal lines (VL1 to VLM) are connected to the sense amplifier (6), and a second connection state in which the first signal lines (HL1 to HLM) are connected to the sense amplifier (6) and the second signal lines (VL1 to VLM) are connected to the driver (5).
    Type: Application
    Filed: April 4, 2012
    Publication date: May 22, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka
  • Patent number: 8730197
    Abstract: A touch panel controller (1), which can accurately detect changes in capacitance values of respective first and second electrostatic capacitors which are touched, includes: a driving section (4) for driving drive lines (DL1 through DL4) on the basis of a code sequence so as to drive (i) electrostatic capacitors (C31 through C34) provided between the respective drive lines (DL1 through DL4) and a sense line (SL3) and (ii) electrostatic capacitors (C41 through C44) provided between the respective drive lines (DL1 through DL4) and a sense line (SL4) so that (i) a first linear sum of first capacitance values of the respective electrostatic capacitors (C31 through C34) is outputted from the sense line (SL3) and (ii) a second linear sum of second capacitance values of the respective electrostatic capacitors (C41 through C44) is outputted from the sense line (SL4); a differential amplifier (5) for amplifying a difference between the first linear sum and the second linear sum; and a saturation prevention control sect
    Type: Grant
    Filed: January 23, 2012
    Date of Patent: May 20, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Mutsumi Hamaguchi, Masayuki Miyamoto, Kunihiko Iizuka
  • Publication number: 20140132541
    Abstract: A touch panel system (71a) includes a capacitance value distribution detection circuit (72). The capacitance value distribution detection circuit (72) switches a connection state between a first connection state and a second connection state, which first connection state makes first signal lines (HL1 to HLM) serve as drive lines (DL1 to DLM) and second signal lines (VL1 to VLM) serve as sense lines (SL1 to SLM), and which second connection state makes the second signal lines (VL1 to VLM) serve as the drive lines (DL1 to DLM) and the first signal lines (HL1 to HLM) serve as the sense lines (SL1 to SLM).
    Type: Application
    Filed: June 4, 2012
    Publication date: May 15, 2014
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Masayuki Miyamoto, Kunihiko Iizuka, Manabu Yumoto, Shinichi Yoshida, Kengo Takahama