Patents by Inventor Takahiro Muroshima

Takahiro Muroshima 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: 10785430
    Abstract: A solid-state imaging device includes: a pixel including a photoelectric converter that generates a charge and a charge accumulator that converts the charge into a voltage; a controller that causes the pixel to perform exposure in a first exposure mode and convert the charge into the voltage with a first gain to output a first pixel signal, and causes the pixel to perform exposure in a second exposure mode and convert the charge into the voltage with a second gain to output a second pixel signal, the second exposure mode being shorter in exposure time than the first exposure mode, and the second gain being lower than the first gain; and a signal processor that synthesizes the second pixel signal after amplification and the first pixel signal.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: September 22, 2020
    Assignee: PANASONIC SEMICONDUCTOR SOLUTIONS CO., LTD.
    Inventors: Makoto Ikuma, Takahiro Muroshima, Takayasu Kito, Hiroyuki Amikawa, Tetsuya Abe
  • Patent number: 10742906
    Abstract: A solid-state imaging device includes: a pixel array unit in which a plurality of pixels are arranged in rows and columns; a plurality of column signal lines which are provided in one-to-one correspondence with pixel columns; a column processor including a plurality of column AD circuits provided in one-to-one correspondence with the plurality of column signal lines; a power supply variation detector which is connected to a power supply wire through which a power supply voltage is transmitted to each of the pixels, and which detects, in correspondence with pixel rows, power supply variation components attributed to variations in the power supply voltage; and a power supply variation corrector which corrects, for each of the pixel rows, a pixel signal detected by the column processor, using the power supply variation components detected by the power supply variation detector.
    Type: Grant
    Filed: August 9, 2018
    Date of Patent: August 11, 2020
    Assignee: PANASONIC SEMICONDUCTOR SOLUTIONS CO., LTD.
    Inventors: Makoto Ikuma, Takahiro Muroshima, Takayasu Kito, Hiroyuki Amikawa, Tetsuya Abe
  • Publication number: 20180376083
    Abstract: A solid-state imaging device includes: a pixel including a photoelectric converter that generates a charge and a charge accumulator that converts the charge into a voltage; a controller that causes the pixel to perform exposure in a first exposure mode and convert the charge into the voltage with a first gain to output a first pixel signal, and causes the pixel to perform exposure in a second exposure mode and convert the charge into the voltage with a second gain to output a second pixel signal, the second exposure mode being shorter in exposure time than the first exposure mode, and the second gain being lower than the first gain; and a signal processor that synthesizes the second pixel signal after amplification and the first pixel signal.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 27, 2018
    Inventors: Makoto IKUMA, Takahiro MUROSHIMA, Takayasu KITO, Hiroyuki AMIKAWA, Tetsuya ABE
  • Publication number: 20180376081
    Abstract: A solid-state imaging device includes: a pixel array unit in which a plurality of pixels are arranged in rows and columns; a plurality of column signal lines which are provided in one-to-one correspondence with pixel columns; a column processor including a plurality of column AD circuits provided in one-to-one correspondence with the plurality of column signal lines; a power supply variation detector which is connected to a power supply wire through which a power supply voltage is transmitted to each of the pixels, and which detects, in correspondence with pixel rows, power supply variation components attributed to variations in the power supply voltage; and a power supply variation corrector which corrects, for each of the pixel rows, a pixel signal detected by the column processor, using the power supply variation components detected by the power supply variation detector.
    Type: Application
    Filed: August 9, 2018
    Publication date: December 27, 2018
    Inventors: Makoto IKUMA, Takahiro MUROSHIMA, Takayasu KITO, Hiroyuki AMIKAWA, Tetsuya ABE
  • Patent number: 9881961
    Abstract: A solid-state imaging device according to an aspect of the present invention includes: an imaging area including a plurality of pixels arranged in rows and columns, each of the plurality of pixels converting incident light into a pixel signal; a column signal line provided for each of the columns, for reading out the pixel signal; and a current source connected to the column signal line, in which the current source includes: three transistors connected in series and provided between the column signal line and a GND line; and a transistor having a drain and a source each of which is connected to a different one of connection points connecting adjacent ones of the three transistors.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: January 30, 2018
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Hiroyuki Kobayashi, Takahiro Muroshima, Hiroshi Toya
  • Publication number: 20150357369
    Abstract: A solid-state imaging device according to an aspect of the present invention includes: an imaging area including a plurality of pixels arranged in rows and columns, each of the plurality of pixels converting incident light into a pixel signal; a column signal line provided for each of the columns, for reading out the pixel signal; and a current source connected to the column signal line, in which the current source includes: three transistors connected in series and provided between the column signal line and a GND line; and a transistor having a drain and a source each of which is connected to a different one of connection points connecting adjacent ones of the three transistors.
    Type: Application
    Filed: August 17, 2015
    Publication date: December 10, 2015
    Inventors: Hiroyuki KOBAYASHI, Takahiro MUROSHIMA, Hiroshi TOYA
  • Patent number: 8710421
    Abstract: A solid-state imaging device according to the present invention includes a pixel cell having a photodiode, a charge detection unit, an amplification transistor, a transfer transistor which transfers a signal charge to the charge detection unit in accordance with a transfer control signal, and a reset transistor which resets the charge detection unit in accordance with a reset control signal; a signal processing circuit which receives a pixel reset potential of the charge detection unit, and a pixel signal potential corresponding to the signal charge transferred to the charge detection unit; a charge pump circuit which steps up or steps down a potential of at least one of the transfer control signal and the reset control signal in accordance with a driving clock signal; and a control logic circuit which causes the driving clock signal to be stopped during a pixel reading time period.
    Type: Grant
    Filed: May 18, 2012
    Date of Patent: April 29, 2014
    Assignee: Panasonic Corporation
    Inventor: Takahiro Muroshima
  • Publication number: 20120228476
    Abstract: A solid-state imaging device according to the present invention includes a pixel cell having a photodiode, a charge detection unit, an amplification transistor, a transfer transistor which transfers a signal charge to the charge detection unit in accordance with a transfer control signal, and a reset transistor which resets the charge detection unit in accordance with a reset control signal; a signal processing circuit which receives a pixel reset potential of the charge detection unit, and a pixel signal potential corresponding to the signal charge transferred to the charge detection unit; a charge pump circuit which steps up or steps down a potential of at least one of the transfer control signal and the reset control signal in accordance with a driving clock signal; and a control logic circuit which causes the driving clock signal to be stopped during a pixel reading time period.
    Type: Application
    Filed: May 18, 2012
    Publication date: September 13, 2012
    Inventor: Takahiro Muroshima
  • Patent number: 8068155
    Abstract: A solid-state image sensor includes: a plurality of pixels, each having a photodiode, a floating diffusion, a transfer transistor, a reset transistor, and an amplifying transistor; vertical signal lines 31 for receiving signals from the plurality of pixels; sampling capacitors 62; circuits 78 for comparing a voltage on a corresponding one of the vertical signal lines 31 with a reference voltage to determine whether the voltage on the corresponding vertical signal line 31 is higher or lower than the reference voltage; and clip circuits 79 for outputting a clip voltage Vclip to a corresponding one of the sampling capacitors 62 based on the output of a corresponding one of the circuits 78. A voltage on each vertical signal line in the state where the signal accumulated in a corresponding photodiode has been transferred to a corresponding floating diffusion, can be used as a comparison voltage of each column.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: November 29, 2011
    Assignee: Panasonic Corporation
    Inventors: Takahiro Muroshima, Yasuyuki Endoh
  • Patent number: 8045032
    Abstract: It is an object of the present invention to provide a solid-state imaging device capable of prevent image defects from appearing in an outputted image while suppressing increase in a layout area with a simple circuit structure and is an MOS solid-state imaging device. The MOS solid-state imaging device includes pixels which outputs signals corresponding to intensity of incident light, vertical signal lines which are respectively provided to columns of the pixels and each of which transmits the signals from said pixels in a column direction, and column amplifier circuits that amplify the signals from the pixels and are respectively connected to the vertical signal lines, and each of the column amplifier circuits includes a voltage clipping circuit includes a voltage clipping circuit which limits a maximum output voltage of said column amplifier circuit.
    Type: Grant
    Filed: July 21, 2008
    Date of Patent: October 25, 2011
    Assignee: Panasonic Corporation
    Inventors: Takahiro Muroshima, Yasuyuki Endoh, Masashi Murakami
  • Patent number: 7791660
    Abstract: A solid-state image sensing device includes: a pixel array in which pixels performing photoelectric conversion are arranged in rows and columns; and a column amplification section in which an image signal output from each pixel is amplified. The column amplification section includes amplifiers each of which is provided for each column, and the column amplification section is connected to a power supply voltage feed section and the ground. An impedance on the power supply side of the amplifier is greater than an impedance on the ground side.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: September 7, 2010
    Assignee: Panasonic Corporation
    Inventors: Hiroshi Yoshida, Yoshiyuki Matsunaga, Takahiro Muroshima
  • Patent number: 7728895
    Abstract: A solid-state image sensing device includes: a plurality of unit pixels 21 arranged in rows and columns each of which outputs a pixel signal according to incident light; and a plurality of floating diffusion portions 22 each of which receives the pixel signals. Each of the floating diffusion portions 22 is shared by two unit pixels 21 which are respectively arranged in adjacent rows and which are respectively adjacent columns.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: June 1, 2010
    Assignee: Panasonic Corporation
    Inventors: Shouzi Tanaka, Ryouhei Miyagawa, Kazunari Koga, Takahiro Muroshima, Kenji Watanabe
  • Publication number: 20100039543
    Abstract: A solid-state image sensor includes: a plurality of pixels, each having a photodiode, a floating diffusion, a transfer transistor, a reset transistor, and an amplifying transistor; vertical signal lines 31 for receiving signals from the plurality of pixels; sampling capacitors 62; circuits 78 for comparing a voltage on a corresponding one of the vertical signal lines 31 with a reference voltage to determine whether the voltage on the corresponding vertical signal line 31 is higher or lower than the reference voltage; and clip circuits 79 for outputting a clip voltage Vclip to a corresponding one of the sampling capacitors 62 based on the output of a corresponding one of the circuits 78. A voltage on each vertical signal line in the state where the signal accumulated in a corresponding photodiode has been transferred to a corresponding floating diffusion, can be used as a comparison voltage of each column.
    Type: Application
    Filed: June 28, 2007
    Publication date: February 18, 2010
    Inventors: Takahiro Muroshima, Yasuyuki Endoh
  • Publication number: 20090033782
    Abstract: It is an object of the present invention to provide a solid-state imaging device capable of prevent image defects from appearing in an outputted image while suppressing increase in a layout area with a simple circuit structure and is an MOS solid-state imaging device. The MOS solid-state imaging device includes pixels which outputs signals corresponding to intensity of incident light, vertical signal lines which are respectively provided to columns of the pixels and each of which transmits the signals from said pixels in a column direction, and column amplifier circuits that amplify the signals from the pixels and are respectively connected to the vertical signal lines, and each of the column amplifier circuits includes a voltage clipping circuit includes a voltage clipping circuit which limits a maximum output voltage of said column amplifier circuit.
    Type: Application
    Filed: July 21, 2008
    Publication date: February 5, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Takahiro Muroshima, Yasuyuki Endoh, Masashi Murakami
  • Publication number: 20090009643
    Abstract: A MOS type solid-state image pickup device includes a pixel unit which includes image pickup elements arranged two-dimensionally; a readout shift register; an electronic shutter shift register; a signal processing unit which extracts a pixel signal from the selected pixel; a horizontal shift register which outputs a column selection signal; and an amplifier circuit which amplifies the extracted pixel output signal. Each of the shift registers has a function of generating a dummy pulse during a blanking period. When the blanking period occurs after the completion of scanning up to the last line, a selection signal is outputted alternately to the last line and the second-from-the-last line of the shift register.
    Type: Application
    Filed: February 16, 2006
    Publication date: January 8, 2009
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Takahiro Muroshima, Masashi Murakami
  • Publication number: 20080273105
    Abstract: A solid-state image sensing device includes: a plurality of unit pixels 21 arranged in rows and columns each of which outputs a pixel signal according to incident light; and a plurality of floating diffusion portions 22 each of which receives the pixel signals. Each of the floating diffusion portions 22 is shared by two unit pixels 21 which are respectively arranged in adjacent rows and which are respectively adjacent columns.
    Type: Application
    Filed: July 11, 2006
    Publication date: November 6, 2008
    Inventors: Shouzi Tanaka, Ryouhei Miyagawa, Kazunari Koga, Takahiro Muroshima, Kenji Watanabe
  • Publication number: 20070247535
    Abstract: A solid-state image sensing device includes: a pixel array in which pixels performing photoelectric conversion are arranged in rows and columns; and a column amplification section in which an image signal output from each pixel is amplified. The column amplification section includes amplifiers each of which is provided for each column, and the column amplification section is connected to a power supply voltage feed section and the ground. An impedance on the power supply side of the amplifier is greater than an impedance on the ground side.
    Type: Application
    Filed: May 1, 2007
    Publication date: October 25, 2007
    Inventors: Hiroshi Yoshida, Yoshiyuki Matsunaga, Takahiro Muroshima