Patents by Inventor Nana Akahane

Nana Akahane 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: 9294698
    Abstract: A solid-state image pickup apparatus includes: two-dimensionally arrayed unit pixels, each including a PD performing optical-electrical conversion of an incident light; an FD and an output terminal provided for each of pixel groups, each including one or more pixels, the terminal being capable of outputting a noise signal and a signal-noise sum signal separately; first lines to which the terminals are connected in common and which are capable of holding voltages based on signals outputted from the terminals; second lines provided in parallel with the first lines and capable of holding a voltage; inter-transfer-line capacitive elements connecting the second lines and the first lines; a reset switch resetting each of the second lines to a reset voltage; a readout switch provided for each of the second lines; and a third line to which the second lines are connected in parallel via the readout switches, respectively.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: March 22, 2016
    Assignees: Tohoku University, Olympus Corporation
    Inventors: Shigetoshi Sugawa, Nana Akahane, Satoru Adachi
  • Patent number: 9264637
    Abstract: A solid-state image pickup apparatus including: two-dimensionally arrayed unit pixels, each including a PD performing optical-electrical conversion of an incident light; an FD and two output terminals provided for each of pixel groups, each including one or more unit pixels, the two output terminals being capable of outputting a noise signal and a signal-noise sum signal separately; first and second transfer lines to which the output terminals are connected in common and which are capable of holding noise signal voltage and signal-noise sum signal voltage, respectively; first switches arranged between the output terminals and the first transfer lines; second switches arranged between the output terminals and the second transfer lines; third and fourth switches provided for the transfer lines, respectively; and third and fourth transfer lines to which the transfer lines are connected in parallel via third and fourth switches, respectively.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: February 16, 2016
    Assignees: Tohoku University, OLYMPUS CORPORATION
    Inventors: Shigetoshi Sugawa, Nana Akahane, Satoru Adachi
  • Publication number: 20160022117
    Abstract: An imaging element includes: a plurality of pixels; first vertical transfer lines; a second vertical transfer line; a reference voltage generator configured to generate a first reference voltage for a column-black reference signal, a second reference voltage for a line-black reference signal and a third reference voltage for phase adjustment; a phase adjusting signal generator configured to output a phase adjusting signal corresponding to the third reference voltage; a first reference signal generator configured to generate a column-black reference signal corresponding to the first reference voltage; a second reference signal generator configured to generate a line-black reference signal corresponding to the second reference voltage; and a timing generator configured to drive the phase adjusting signal generator, the first reference signal generator and the second reference signal generator to transmit the phase adjusting signal, the column-black reference signal and the line-black reference signal, respectiv
    Type: Application
    Filed: October 1, 2015
    Publication date: January 28, 2016
    Applicant: OLYMPUS CORPORATION
    Inventors: Nana AKAHANE, Makoto ONO, Takahiro NISHIWAKI, Katsumi HOSOGAI
  • Publication number: 20150381866
    Abstract: An imaging element includes: a plurality of pixels configured to receive light from outside and generate and output an imaging signal depending on an amount of the light received; a first transfer line connected to the pixel; a second transfer line; a column selection switch configured to select one pixel column and output the imaging signal to the second transfer line; a column source follower including a gate to which the imaging signal transferred by the first transfer line is input, a drain end being connected to a power supply voltage, and a source end being connected to the column selection switch; a constant current source configured to drive the column source follower and read out the imaging signal to the second transfer line; and a current generating unit configured to flow a predetermined current to the source end side of the column source follower.
    Type: Application
    Filed: September 8, 2015
    Publication date: December 31, 2015
    Applicant: OLYMPUS CORPORATION
    Inventors: Makoto ONO, Nana AKAHANE, Masashi SAITO, Yoshio HAGIHARA, Susumu YAMAZAKI
  • Patent number: 9191591
    Abstract: An imaging device causes a signal to be output from a first transfer line via a second transfer unit by a noise signal reading operation and a light-noise sum signal reading operation, the noise signal reading operation resetting a transfer capacitor when a signal of a charge converter is output to the first transfer line after a first transfer unit is turned into an OFF state and the charge converter is reset, and the light-noise sum signal reading operation outputting the signal of the charge converter to the first transfer line after the transfer capacitor resetting unit is turned into an OFF state, the first transfer unit is turned into an ON state, and a charge accumulated by a photoelectric conversion element is transferred.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: November 17, 2015
    Assignee: OLYMPUS CORPORATION
    Inventors: Nana Akahane, Makoto Ono, Takahiro Nishiwaki, Satoru Adachi
  • Publication number: 20150029376
    Abstract: A solid-state image pickup apparatus includes: two-dimensionally arrayed unit pixels, each including a PD performing optical-electrical conversion of an incident light; an FD and an output terminal provided for each of pixel groups, each including one or more pixels, the terminal being capable of outputting a noise signal and a signal-noise sum signal separately; first lines to which the terminals are connected in common and which are capable of holding voltages based on signals outputted from the terminals; second lines provided in parallel with the first lines and capable of holding a voltage; inter-transfer-line capacitive elements connecting the second lines and the first lines; a reset switch resetting each of the second lines to a reset voltage; a readout switch provided for each of the second lines; and a third line to which the second lines are connected in parallel via the readout switches, respectively.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Shigetoshi SUGAWA, Nana AKAHANE, Satoru ADACHI
  • Publication number: 20150029375
    Abstract: A solid-state image pickup apparatus including: two-dimensionally arrayed unit pixels, each including a PD performing optical-electrical conversion of an incident light; an FD and two output terminals provided for each of pixel groups, each including one or more unit pixels, the two output terminals being capable of outputting a noise signal and a signal-noise sum signal separately; first and second transfer lines to which the output terminals are connected in common and which are capable of holding noise signal voltage and signal-noise sum signal voltage, respectively; first switches arranged between the output terminals and the first transfer lines; second switches arranged between the output terminals and the second transfer lines; third and fourth switches provided for the transfer lines, respectively; and third and fourth transfer lines to which the transfer lines are connected in parallel via third and fourth switches, respectively.
    Type: Application
    Filed: October 14, 2014
    Publication date: January 29, 2015
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Shigetoshi SUGAWA, Nana AKAHANE, Satoru ADACHI
  • Publication number: 20140320618
    Abstract: An imaging device causes a signal to be output from a first transfer line via a second transfer unit by a noise signal reading operation and a light-noise sum signal reading operation, the noise signal reading operation resetting a transfer capacitor when a signal of a charge converter is output to the first transfer line after a first transfer unit is turned into an OFF state and the charge converter is reset, and the light-noise sum signal reading operation outputting the signal of the charge converter to the first transfer line after the transfer capacitor resetting unit is turned into an OFF state, the first transfer unit is turned into an ON state, and a charge accumulated by a photoelectric conversion element is transferred.
    Type: Application
    Filed: May 9, 2014
    Publication date: October 30, 2014
    Applicant: OLYMPUS MEDICAL SYSTEMS CORP.
    Inventors: Nana AKAHANE, Makoto ONO, Takahiro NISHIWAKI, Satoru ADACHI
  • Patent number: 8759740
    Abstract: Provided is a solid-state imaging device that includes capacitors in a number greater than a unit read-out number that are connected to a plurality of pixels via transfer lines, and that performs a step of transferring to and retaining in separate capacitors from each other a noise signal output from the pixels in a number corresponding to the unit read-out number; and a step of repeating, for as many times as the unit read-out number, by switching the pixels and the capacitors, an operation in which a signal-plus-noise signal output from one of the pixels is transferred to and retained in one of the other capacitors, and the noise signal and the signal-plus-noise signal that have been output from the same pixel and retained in separate capacitors are subsequently output at the same time.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: June 24, 2014
    Assignee: Olympus Medical Systems Corp.
    Inventor: Nana Akahane
  • Publication number: 20140034810
    Abstract: Provided is a solid-state imaging device that includes capacitors in a number greater than a unit read-out number that are connected to a plurality of pixels via transfer lines, and that performs a step of transferring to and retaining in separate capacitors from each other a noise signal output from the pixels in a number corresponding to the unit read-out number; and a step of repeating, for as many times as the unit read-out number, by switching the pixels and the capacitors, an operation in which a signal-plus-noise signal output from one of the pixels is transferred to and retained in one of the other capacitors, and the noise signal and the signal-plus-noise signal that have been output from the same pixel and retained in separate capacitors are subsequently output at the same time.
    Type: Application
    Filed: August 5, 2013
    Publication date: February 6, 2014
    Inventor: Nana AKAHANE
  • Patent number: 8184191
    Abstract: A solid-state imaging device includes a plurality of pixels stored in one-dimensional or two-dimensional array, each of the plurality of pixels including a photodiode receiving light and producing photocharges, an overflow gate coupled to the photodiode and transferring photocharges that overflow the photodiode during a storage operation, and a storage capacitor element that stores the photocharges transferred by the overflow gate during the storage operation.
    Type: Grant
    Filed: August 9, 2006
    Date of Patent: May 22, 2012
    Assignee: Tohoku University
    Inventors: Shigetoshi Sugawa, Nana Akahane, Satoru Adachi
  • Patent number: 7821560
    Abstract: In an optical device such as an optical sensor or a solid-state imaging device having a photodiode for receiving light and producing photocharges and a transfer transistor (or an overflow gate) for transferring the photocharge, it is configured that photocharges overflowing from the photo diode in storage operation are stored into a plurality of storage capacitance elements through the transfer transistor or the overflow gate, thereby obtaining the optical device adapted to maintain a high sensitivity and a high S/N ratio and having a wide dynamic range.
    Type: Grant
    Filed: April 6, 2006
    Date of Patent: October 26, 2010
    Assignee: Tohoku Universityu
    Inventors: Shigetoshi Sugawa, Nana Akahane
  • Publication number: 20090045319
    Abstract: In an optical device such as an optical sensor or a solid-state imaging device having a photodiode for receiving light and producing photocharges and a transfer transistor (or an overflow gate) for transferring the photocharge, it is configured that photocharges overflowing from the photodiode in storage operation are stored into a plurality of storage capacitance elements through the transfer transistor or the overflow gate, thereby obtaining the optical device adapted to maintain a high sensitivity and a high S/N ratio and having a wide dynamic range.
    Type: Application
    Filed: April 6, 2006
    Publication date: February 19, 2009
    Inventors: Shigetoshi Sugawa, Nana Akahane
  • Publication number: 20080036888
    Abstract: A solid-state imaging device includes a plurality of pixels stored in one-dimensional or two-dimensional array, each of the plurality of pixels including a photodiode receiving light and producing photocharges, an overflow gate coupled to the photodiode and transferring photocharges that overflow the photodiode during a storage operation, and a storage capacitor element that stores the photocharges transferred by the overflow gate during the storage operation.
    Type: Application
    Filed: August 9, 2006
    Publication date: February 14, 2008
    Inventors: Shigetoshi Sugawa, Nana Akahane, Satoru Adachi