Patents by Inventor Shigenari TAGUCHI
Shigenari TAGUCHI 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).
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Patent number: 11158658Abstract: [Object] To achieve a radiation detector capable of suppressing variation in the amount of radiation detected. [Solution] A first gate electrode (52) is connected to a light receiving device, and a second gate electrode (53) is configured to have the same potential as that of the first gate electrode (52).Type: GrantFiled: June 10, 2019Date of Patent: October 26, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masahiro Shiota, Shigenari Taguchi, Takahiro Shindoh, Kunihiko Iizuka, Nobuyuki Ashida
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Patent number: 11146222Abstract: The circuit area of an amplifier provided in a photon-counting radiation detector is decreased compared with the related art. A pulse amplification measurement circuit includes: an inverting amplification circuit that inverts and amplifies an input signal to generate an inverted amplified output; a feedback transistor that connects an input unit and an output unit of the inverting amplification circuit to each other; and a pulse measurement circuit that generates an output signal corresponding to the number of pulses of the inverted amplified output. The pulse measurement circuit is capable of supplying the output signal toward the feedback transistor.Type: GrantFiled: March 19, 2018Date of Patent: October 12, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Takahiro Shindoh, Kunihiko Iizuka, Shigenari Taguchi
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Patent number: 10886314Abstract: [Object] To achieve a high-sensitivity radiation detector. [Solution] An amplifying transistor (3) is configured such that a photodiode (1) receives light with the amplifying transistor (3) conductive.Type: GrantFiled: June 14, 2019Date of Patent: January 5, 2021Assignee: SHARP KABUSHIKI KAISHAInventors: Masahiro Shiota, Shigenari Taguchi, Takahiro Shindoh, Kunihiko Iizuka, Nobuyuki Ashida
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Patent number: 10866332Abstract: An imaging system includes an input voltage setting unit that applies an input voltage to an Amp transistor, a setting output value acquisition unit that acquires a corresponding output for each pixel, and a calibration characteristic deriving unit that derives an input-output characteristic indicating a correspondence relationship between the input voltage and the output and derives a calibration characteristic to be used for calibration based on an inverse characteristic of the input-output characteristic.Type: GrantFiled: April 2, 2019Date of Patent: December 15, 2020Assignee: SHARP KABUSHIKI KAISHAInventors: Shigenari Taguchi, Seiichi Hama, Nobuyuki Ashida, Kunihiko Iizuka, Takahiro Shindoh, Isao Nakamura
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Publication number: 20200213552Abstract: [Object] To reduce 1/f noise by utilizing the functionality of controlling row selection, with which a typical solid-state imaging element is provided. [Solution] A solid-state imaging element (1A) includes a pixel array (A) in which a plurality of columns of pixels (P) are arranged, a row selection unit (13) that specifies a readout row of the pixel array (A), and a control device (30) that sweeps information carried by each pixel (P) a plurality of times by controlling the row selection unit (13) and outputs an output value in accordance with results of a plurality of readouts of the information obtained from each pixel (P) by the sweeping.Type: ApplicationFiled: December 23, 2019Publication date: July 2, 2020Inventors: NOBUYUKI ASHIDA, KUNIHIKO IIZUKA, SHIGENARI TAGUCHI, MASAHIRO SHIOTA
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Publication number: 20200177141Abstract: The circuit area of an amplifier provided in a photon-counting radiation detector is decreased compared with the related art. A pulse amplification measurement circuit includes: an inverting amplification circuit that inverts and amplifies an input signal to generate an inverted amplified output; a feedback transistor that connects an input unit and an output unit of the inverting amplification circuit to each other; and a pulse measurement circuit that generates an output signal corresponding to the number of pulses of the inverted amplified output. The pulse measurement circuit is capable of supplying the output signal toward the feedback transistor.Type: ApplicationFiled: March 19, 2018Publication date: June 4, 2020Inventors: TAKAHIRO SHINDOH, KUNIHIKO IIZUKA, SHIGENARI TAGUCHI
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Publication number: 20200014863Abstract: [Object] To realize an image capturing apparatus capable of suppressing noise in an image. [Solution] An image capturing apparatus (100) includes a plurality of pixels (110) arranged in a matrix form. Each pixel includes a switching element (112) configured to control outputting of a charge accumulated in a sensor element (111). Pixels in each column are grouped into blocks (120). Each block includes a block switching element (122) configured to control outputting.Type: ApplicationFiled: July 3, 2019Publication date: January 9, 2020Inventors: MASAHIRO SHIOTA, SHIGENARI TAGUCHI, KUNIHIKO IIZUKA, NOBUYUKI ASHIDA
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Publication number: 20190386045Abstract: [Object] To achieve a radiation detector capable of suppressing variation in the amount of radiation detected. [Solution] A first gate electrode (52) is connected to a light receiving device, and a second gate electrode (53) is configured to have the same potential as that of the first gate electrode (52).Type: ApplicationFiled: June 10, 2019Publication date: December 19, 2019Inventors: MASAHIRO SHIOTA, SHIGENARI TAGUCHI, TAKAHIRO SHINDOH, KUNIHIKO IIZUKA, NOBUYUKI ASHIDA
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Publication number: 20190386046Abstract: [Object] To achieve a high-sensitivity radiation detector. [Solution] An amplifying transistor (3) is configured such that a photodiode (1) receives light with the amplifying transistor (3) conductive.Type: ApplicationFiled: June 14, 2019Publication date: December 19, 2019Inventors: MASAHIRO SHIOTA, SHIGENARI TAGUCHI, TAKAHIRO SHINDOH, KUNIHIKO IIZUKA, NOBUYUKI ASHIDA
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Publication number: 20190324163Abstract: An imaging system includes an input voltage setting unit that applies an input voltage to an Amp transistor, a setting output value acquisition unit that acquires a corresponding output for each pixel, and a calibration characteristic deriving unit that derives an input-output characteristic indicating a correspondence relationship between the input voltage and the output and derives a calibration characteristic to be used for calibration based on an inverse characteristic of the input-output characteristic.Type: ApplicationFiled: April 2, 2019Publication date: October 24, 2019Inventors: SHIGENARI TAGUCHI, SEIICHI HAMA, NOBUYUKI ASHIDA, KUNIHIKO IIZUKA, TAKAHIRO SHINDOH, ISAO NAKAMURA
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Patent number: 10209374Abstract: 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: GrantFiled: June 9, 2016Date of Patent: February 19, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Kunihiko Iizuka, Katsuhisa Kashiwagi, Shigenari Taguchi
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Patent number: 10180501Abstract: 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: GrantFiled: September 7, 2015Date of Patent: January 15, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Kunihiko Iizuka, Shigenari Taguchi
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Patent number: 10165999Abstract: 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: GrantFiled: March 10, 2016Date of Patent: January 1, 2019Assignee: SHARP KABUSHIKI KAISHAInventors: Kunihiko Iizuka, Shigenari Taguchi, Katsuhisa Kashiwagi
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Publication number: 20180249976Abstract: 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: ApplicationFiled: March 10, 2016Publication date: September 6, 2018Inventors: KUNIHIKO IIZUKA, SHIGENARI TAGUCHI, KATSUHISA KASHIWAGI
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Publication number: 20180203137Abstract: 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: ApplicationFiled: June 9, 2016Publication date: July 19, 2018Applicant: SHARP KABUSHIKI KAISHAInventors: KUNIHIKO IIZUKA, KATSUHISA KASHIWAGI, SHIGENARI TAGUCHI
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Publication number: 20170307764Abstract: 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: ApplicationFiled: September 7, 2015Publication date: October 26, 2017Inventors: Kunihiko IIZUKA, Shigenari TAGUCHI