Patents by Inventor Hirokazu Shiraki

Hirokazu Shiraki 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: 9927516
    Abstract: A distance measuring apparatus includes: a light-emitting element that emits first to third pulsed beams; sensors that detect reflected light that is each of the pulsed beams reflected off an object, convert the reflected light into electrical signals, and accumulate the electrical signals over a predetermined exposure time; and a computing unit that derives a distance to the object using first to third signal amounts output by the sensors as a result of detecting, over the predetermined exposure time from first to third points in time, and the computing unit derives the distance to the object based on a first derived amount that is an amount derived using the first and second signal amounts and a second derived amount that is an amount derived using the second and third signal amounts.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: March 27, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventor: Hirokazu Shiraki
  • Patent number: 9778361
    Abstract: In a TOF distance measurement employing light, the accuracy of distance measurement is improved without a significant increase in cost. A light source emits light to an object during an emission period. A sensor converts received reflected light (delay time ?) into an electrical signal during a plurality of signal accumulation periods, and accommodates the electrical signal. The signal accumulation period is set so that an accumulated signal amount varies depending on a distance to the object. The emission intensity of the light source is changed during the emission period so that the accumulated signal amount and the distance to the object has a nonlinear relationship.
    Type: Grant
    Filed: July 1, 2015
    Date of Patent: October 3, 2017
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Akira Tsukamoto, Hirokazu Shiraki
  • Publication number: 20160047905
    Abstract: A distance measuring apparatus includes: a light-emitting element that emits first to third pulsed beams; sensors that detect reflected light that is each of the pulsed beams reflected off an object, convert the reflected light into electrical signals, and accumulate the electrical signals over a predetermined exposure time; and a computing unit that derives a distance to the object using first to third signal amounts output by the sensors as a result of detecting, over the predetermined exposure time from first to third points in time, and the computing unit derives the distance to the object based on a first derived amount that is an amount derived using the first and second signal amounts and a second derived amount that is an amount derived using the second and third signal amounts.
    Type: Application
    Filed: October 28, 2015
    Publication date: February 18, 2016
    Inventor: Hirokazu SHIRAKI
  • Publication number: 20150301177
    Abstract: In a TOF distance measurement employing light, the accuracy of distance measurement is improved without a significant increase in cost. A light source emits light to an object during an emission period. A sensor converts received reflected light (delay time ?) into an electrical signal during a plurality of signal accumulation periods, and accommodates the electrical signal. The signal accumulation period is set so that an accumulated signal amount varies depending on a distance to the object. The emission intensity of the light source is changed during the emission period so that the accumulated signal amount and the distance to the object has a nonlinear relationship.
    Type: Application
    Filed: July 1, 2015
    Publication date: October 22, 2015
    Inventors: Akira TSUKAMOTO, Hirokazu SHIRAKI
  • Patent number: 8730366
    Abstract: A solid-state imaging device is provided in which transfer failure of signal charges is suppressed. The solid-state imaging device includes a plurality of photoelectric conversion units, a plurality of vertical transfer units having a plurality of vertical transfer electrodes, a plurality of horizontal transfer units having a plurality of horizontal transfer electrodes, and an intermediate transfer unit having a branch transfer electrode. In the first horizontal transfer unit, one of the horizontal transfer electrodes includes a plurality of column direction electrodes that are disposed adjacent to one another in the vertical direction and transfer the signal charges via the intermediate transfer unit to the second horizontal transfer unit. The vertical transfer electrode, the horizontal transfer electrodes, and the branch transfer electrode are a single layer electrode.
    Type: Grant
    Filed: September 11, 2012
    Date of Patent: May 20, 2014
    Assignee: Panasonic Corporation
    Inventors: Koichi Yonemura, Hirokazu Shiraki, Akira Tsukamoto
  • Publication number: 20130002921
    Abstract: A solid-state imaging device is provided in which transfer failure of signal charges is suppressed. The solid-state imaging device includes a plurality of photoelectric conversion units, a plurality of vertical transfer units having a plurality of vertical transfer electrodes, a plurality of horizontal transfer units having a plurality of horizontal transfer electrodes, and an intermediate transfer unit having a branch transfer electrode. In the first horizontal transfer unit, one of the horizontal transfer electrodes includes a plurality of column direction electrodes that are disposed adjacent to one another in the vertical direction and transfer the signal charges via the intermediate transfer unit to the second horizontal transfer unit. The vertical transfer electrode, the horizontal transfer electrodes, and the branch transfer electrode are a single layer electrode.
    Type: Application
    Filed: September 11, 2012
    Publication date: January 3, 2013
    Inventors: Koichi YONEMURA, Hirokazu SHIRAKI, Akira TSUKAMOTO
  • Patent number: 7956389
    Abstract: A solid-state imaging device includes: a semiconductor substrate; photoelectric conversion elements; vertical charge transfer paths that transfer charges generated in photoelectric conversion elements, in a vertical direction; a horizontal charge transfer path that transfers the charges transferred in vertical charge transfer paths, in a horizontal direction orthogonal to the vertical direction; a plurality of charge accumulating sections between the vertical charge transfer paths and the horizontal charge transfer path; a plurality of electrodes disposed above the respective charge accumulating sections, the plurality of electrodes being classified into a plurality of kinds of electrodes; wirings corresponding to the respective kinds of electrodes and extending in the horizontal direction above the plurality of electrodes; and a planarizing layer disposed between the wirings and an uneven surface caused by the plurality of electrodes that are present in areas overlapping the wirings, so as to planarize the u
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: June 7, 2011
    Assignee: Fujifilm Corporation
    Inventors: Hirokazu Shiraki, Katsumi Ikeda
  • Publication number: 20100053404
    Abstract: Driving is performed so that a transition start time point ta of drive pulse signals ?H1 and ?H2 which are applied to transfer electrodes of a charge transfer section on an upstream side of a branch section is within transition period B or C of drive pulse signals ?HP1 and ?HP2 which are applied to transfer electrodes of the charge transfer section on a downstream side.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 4, 2010
    Applicant: FUJIFILM Corporation
    Inventors: Hirokazu Shiraki, Makoto Kobayashi
  • Patent number: 7605411
    Abstract: An HCCD includes a channel 21 that transfers electric charges in an X direction, a channel 25 that transfers the electric charges in a Z1 direction, a channel 23 that transfers the electric charges in a Z2 direction, and a channel 22 that connects the channels 23, 25 to the channel 21. The following relation is satisfied in impurity concentration of the channels: channel 21 channel 22 channel 23, 25. A fixed DC voltage is applied to branch electrodes 12a, 12b above the channel 22. The channel 22 has protrusion portions 19 that protrude inward from an outer circumference, which connects T1 and T2, and an outer circumference, which connects T3 and T4. The protrusion portions 19 causes charges below the transfer electrode 11b to move near the center of the channel 22 in a Y direction. Thereby, the travel distance of the charges in the channel 22 is reduced.
    Type: Grant
    Filed: July 17, 2008
    Date of Patent: October 20, 2009
    Assignee: Fujifilm Corporation
    Inventors: Hirokazu Shiraki, Makoto Kobayashi, Katsumi Ikeda
  • Publication number: 20090078969
    Abstract: A solid-state imaging device includes: a semiconductor substrate; photoelectric conversion elements; vertical charge transfer paths that transfer charges generated in photoelectric conversion elements, in a vertical direction; a horizontal charge transfer path that transfers the charges transferred in vertical charge transfer paths, in a horizontal direction orthogonal to the vertical direction; a plurality of charge accumulating sections between the vertical charge transfer paths and the horizontal charge transfer path; a plurality of electrodes disposed above the respective charge accumulating sections, the plurality of electrodes being classified into a plurality of kinds of electrodes; wirings corresponding to the respective kinds of electrodes and extending in the horizontal direction above the plurality of electrodes; and a planarizing layer disposed between the wirings and an uneven surface caused by the plurality of electrodes that are present in areas overlapping the wirings, so as to planarize the u
    Type: Application
    Filed: September 19, 2008
    Publication date: March 26, 2009
    Inventors: Hirokazu SHIRAKI, Katsumi Ikeda
  • Publication number: 20090020789
    Abstract: An HCCD includes a channel 21 that transfers electric charges in an X direction, a channel 25 that transfers the electric charges in a Z1 direction, a channel 23 that transfers the electric charges in a Z2 direction, and a channel 22 that connects the channels 23, 25 to the channel 21. The following relation is satisfied in impurity concentration of the channels: channel 21<channel 22<channel 23, 25 A fixed DC voltage is applied to branch electrodes 12a, 12b above the channel 22. The channel 22 has protrusion portions 19 that protrude inward from an outer circumference, which connects T1 and T2, and an outer circumference, which connects T3 and T4. The protrusion portions 19 causes charges below the transfer electrode 11b to move near the center of the channel 22 in a Y direction. Thereby, the travel distance of the charges in the channel 22 is reduced.
    Type: Application
    Filed: July 17, 2008
    Publication date: January 22, 2009
    Applicant: FUJIFILM Corporation
    Inventors: Hirokazu SHIRAKI, Makoto Kobayashi, Katsumi Ikeda