Patents by Inventor Kunio Matsubara

Kunio Matsubara 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).

  • Publication number: 20200036380
    Abstract: In recent years, it has been desired to further shorten the dead time. Provided is a driving device that drives on/off a main switching element to which a free wheeling diode is anti-parallel connected, wherein the driving device includes a determination unit configured to output a determination signal indicating whether free wheeling current is flowing from a source terminal to a drain terminal of the main switching element; and a drive control unit configured to reduce a switching speed when the main switching element is driven from an on-state to an off-state on condition that the determination signal indicating that the free wheeling current is flowing is output.
    Type: Application
    Filed: June 3, 2019
    Publication date: January 30, 2020
    Inventors: Kunio MATSUBARA, Tsuyoshi NAGANO
  • Patent number: 10547300
    Abstract: A driving device is provided, which drives on/off a main switching element to which a diode is anti-parallel connected, wherein the driving device includes a detection unit configured to detect a voltage between a drain terminal and a source terminal; a determination unit configured to output a determination signal indicating whether a free wheeling current is flowing from the source terminal to the drain terminal based on a detected voltage detected by the detection unit; and a drive control unit configured to perform control such that the main switching element is set in an on-state on condition that an on command signal for turning on the main switching element is input and on condition that the determination signal indicating that the free wheeling current is flowing is output.
    Type: Grant
    Filed: June 3, 2019
    Date of Patent: January 28, 2020
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio Matsubara, Tsuyoshi Nagano
  • Patent number: 10505535
    Abstract: A driving apparatus including: gate driving circuit to drive gates of a first semiconductor element and a second semiconductor element connected in series between a positive side power supply line and a negative side power supply line; a first timing generating circuit to generate a first timing signal when voltage applied to the second semiconductor element becomes reference voltage during a turn-off period of the first semiconductor element; and a first driving condition change circuit, wherein the gate driving circuit relaxes change in a charge amount of the gate of the first semiconductor element, according to the first timing signal.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: December 10, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio Matsubara, Hirotoshi Kaneda
  • Publication number: 20190296065
    Abstract: Provided is a technique to prevent decreases in the detection accuracy caused by leakage current of photoelectric conversion elements that is caused by permeation of moisture. An active matrix substrate 1 includes a plurality of pixels, each of which includes: a photoelectric conversion element 12 that includes a pair of electrodes 14a, 14b and a semiconductor layer 15 interposed between the electrodes 14a, 14b; an inorganic film 105a that covers a part of a surface of one electrode 14b of the pair of electrodes, and a side surface of the photoelectric conversion element 12; a protection film 105b that has corrosion resistance against moisture, and covers a part of the inorganic film 105a that overlaps with the side surface of the photoelectric conversion element 12; and an organic film 106 that covers the inorganic film 105a and the protection film 105b.
    Type: Application
    Filed: March 25, 2019
    Publication date: September 26, 2019
    Inventors: Katsunori MISAKI, Kunio MATSUBARA
  • Publication number: 20190190511
    Abstract: A driving apparatus is provided, the driving apparatus including: a gate driving unit that drives a semiconductor element; a sampling unit that samples, in an on-period of the semiconductor element, an observation value that changes according to an on-current flowing through the semiconductor element; and a changing unit that changes a driving condition under which the gate driving unit drives a gate of the semiconductor element when the semiconductor element is turned off according to the observation value sampled in an on-period of the semiconductor element.
    Type: Application
    Filed: October 23, 2018
    Publication date: June 20, 2019
    Inventors: Kunio MATSUBARA, Tsuyoshi NAGANO
  • Publication number: 20190157759
    Abstract: A scanning antenna includes a TFT substrate, a slot substrate, and a liquid crystal layer. The TFT substrate includes a transfer terminal section including a patch connection section formed of the same low-resistance metal film as that of a patch electrode, a first protection metal layer formed on the patch connection section, and a first insulating layer including an opening partially exposing an upper face of the first protection metal layer. The slot substrate includes a terminal section including a slot connection section formed of the same low-resistance metal film as that of the slot electrode, a second protection metal layer formed on the slot connection section, and a second insulating layer including an opening partially exposing an upper face of the second protection metal layer.
    Type: Application
    Filed: June 6, 2017
    Publication date: May 23, 2019
    Inventors: KATSUNORI MISAKI, KUNIO MATSUBARA
  • Publication number: 20180316344
    Abstract: A driving apparatus including: gate driving circuit to drive gates of a first semiconductor element and a second semiconductor element connected in series between a positive side power supply line and a negative side power supply line; a first timing generating circuit to generate a first timing signal when voltage applied to the second semiconductor element becomes reference voltage during a turn-off period of the first semiconductor element; and a first driving condition change circuit, wherein the gate driving circuit relaxes change in a charge amount of the gate of the first semiconductor element, according to the first timing signal.
    Type: Application
    Filed: April 18, 2018
    Publication date: November 1, 2018
    Inventors: Kunio MATSUBARA, Hirotoshi KANEDA
  • Patent number: 9774269
    Abstract: A bidirectional DC/DC converter includes first and second control circuits, and first and second bridge circuits respectively connected to first and second direct current voltage supplies. In one embodiment variant, when power is supplied from the first direct current voltage supply to the second direct current voltage supply, the first control circuit carries out PFM control of the first bridge circuit at a frequency equal to or lower than the resonance frequency of an LC resonant circuit in accordance with a control amount based on the voltage and current of the second direct current voltage supply. When power is supplied in the other direction, the second control circuit carries out fixed frequency control of the second bridge circuit, using phase shift control or the like, in accordance with a control amount based on the voltage and current of the first direct current voltage supply.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: September 26, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio Matsubara, Yukihiro Nishikawa
  • Patent number: 9368523
    Abstract: This semiconductor device (1000A) includes a TFT (100A) with an oxide semiconductor layer 9, a storage capacitor line (12), and a first transparent electrode (15) electrically connected to the storage capacitor line (12). The first transparent electrode (15) includes a portion which overlaps with a first connecting layer (8x) when viewed along a normal to a substrate (1). The portion that overlaps with the first connecting layer (8x) has a point symmetric shape of which a point of symmetry is located inside a contact hole (CH2) when viewed along a normal to the substrate (1). The first transparent electrode (15) is not in direct contact with the first connecting layer (8x). A portion of the first transparent electrode (15) is in direct contact with a second connecting layer (8x). The first connecting layer (8x) is in direct contact with the second connecting layer (19a).
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: June 14, 2016
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Katsunori Misaki, Kunio Matsubara
  • Publication number: 20150381064
    Abstract: A bidirectional DC/DC converter includes first and second control circuits, and first and second bridge circuits respectively connected to first and second direct current voltage supplies. In one embodiment variant, when power is supplied from the first direct current voltage supply to the second direct current voltage supply, the first control circuit carries out PFM control of the first bridge circuit at a frequency equal to or lower than the resonance frequency of an LC resonant circuit in accordance with a control amount based on the voltage and current of the second direct current voltage supply. When power is supplied in the other direction, the second control circuit carries out fixed frequency control of the second bridge circuit, using phase shift control or the like, in accordance with a control amount based on the voltage and current of the first direct current voltage supply.
    Type: Application
    Filed: September 3, 2015
    Publication date: December 31, 2015
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio Matsubara, Yukihiro Nishikawa
  • Patent number: 9207826
    Abstract: Provided is a touch panel configured to minimize electrode disconnection caused by swelling of the insulating layer during the production process. The touch panel is equipped with: an insulating substrate; first island-shaped electrodes (111) disposed along a first direction; second island-shaped electrodes (121) disposed along a second direction intersecting the first direction; a connecting member (112) for connecting together the first island-shaped electrodes (111); an insulating film (15) formed covering a portion of the connecting member (112); and a relay electrode (122) for connecting together the second island-shaped electrodes (121) over the insulating film (15). The relay electrode (122), in a section thereof that overlaps the connecting member (112) in a plan view, is narrower in width, in a direction perpendicular to the second direction, than the width of the insulating film (15).
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: December 8, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Kunio Matsubara, Katsunori Misaki
  • Patent number: 9197135
    Abstract: A bi-directional DC/DC converter comprises bridge circuits connected to DC voltage sources, an isolation transformer, an LC resonance circuit, and detection circuits for detecting voltages and currents of the DC voltage sources. A control circuit in the power flow from a first DC voltage source to a second DC voltage source changes over between fixed frequency control and frequency modulation control according to the magnitude of a control variable, and a control circuit in the power flow from a second DC voltage source to the first DC voltage source changes over between fixed frequency control and frequency modulation control according to the magnitude of another control variable. Thus, the bi-directional DC/DC converter can be applied to devices with a wide range of input and output voltages.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: November 24, 2015
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio Matsubara, Yukihiro Nishikawa
  • Publication number: 20150053968
    Abstract: This semiconductor device (1000A) includes a TFT (100A) with an oxide semiconductor layer 9, a storage capacitor line (12), and a first transparent electrode (15) electrically connected to the storage capacitor line (12). The first transparent electrode (15) includes a portion which overlaps with a first connecting layer (8x) when viewed along a normal to a substrate (1). The portion that overlaps with the first connecting layer (8x) has a point symmetric shape of which a point of symmetry is located inside a contact hole (CH2) when viewed along a normal to the substrate (1). The first transparent electrode (15) is not in direct contact with the first connecting layer (8x). A portion of the first transparent electrode (15) is in direct contact with a second connecting layer (8x). The first connecting layer (8x) is in direct contact with the second connecting layer (19a).
    Type: Application
    Filed: March 11, 2013
    Publication date: February 26, 2015
    Inventors: Katsunori Misaki, Kunio Matsubara
  • Publication number: 20140240623
    Abstract: Provided is a touch panel configured to minimize electrode disconnection caused by swelling of the insulating layer during the production process. The touch panel is equipped with: an insulating substrate; first island-shaped electrodes (111) disposed along a first direction; second island-shaped electrodes (121) disposed along a second direction intersecting the first direction; a connecting member (112) for connecting together the first island-shaped electrodes (111); an insulating film (15) formed covering a portion of the connecting member (112); and a relay electrode (122) for connecting together the second island-shaped electrodes (121) over the insulating film (15). The relay electrode (122), in a section thereof that overlaps the connecting member (112) in a plan view, is narrower in width, in a direction perpendicular to the second direction, than the width of the insulating film (15).
    Type: Application
    Filed: September 21, 2012
    Publication date: August 28, 2014
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Kunio Matsubara, Katsunori Misaki
  • Publication number: 20140104890
    Abstract: A bi-directional DC/DC converter comprises bridge circuits connected to DC voltage sources, an isolation transformer, an LC resonance circuit, and detection circuits for detecting voltages and currents of the DC voltage sources. A control circuit in the power flow from a first DC voltage source to a second DC voltage source changes over between fixed frequency control and frequency modulation control according to the magnitude of a control variable, and a control circuit in the power flow from a second DC voltage source to the first DC voltage source changes over between fixed frequency control and frequency modulation control according to the magnitude of another control variable. Thus, the bi-directional DC/DC converter can be applied to devices with a wide range of input and output voltages.
    Type: Application
    Filed: September 5, 2013
    Publication date: April 17, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventors: Kunio MATSUBARA, Yukihiro NISHIKAWA
  • Patent number: 7932963
    Abstract: The invention relates to a substrate for a liquid crystal display device, a liquid crystal display device provided with the same, and a manufacturing method of the same, and provides a substrate for a liquid crystal display device in which a manufacture process can be cut down and manufacturing cost is reduced, a liquid crystal display device provided with the same, and a manufacturing method of the same.
    Type: Grant
    Filed: June 7, 2010
    Date of Patent: April 26, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kunio Matsubara
  • Publication number: 20100245748
    Abstract: The invention relates to a substrate for a liquid crystal display device, a liquid crystal display device provided with the same, and a manufacturing method of the same, and provides a substrate for a liquid crystal display device in which a manufacture process can be cut down and manufacturing cost is reduced, a liquid crystal display device provided with the same, and a manufacturing method of the same.
    Type: Application
    Filed: June 7, 2010
    Publication date: September 30, 2010
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kunio Matsubara
  • Patent number: 7782410
    Abstract: The invention relates to a substrate for a liquid crystal display device, a liquid crystal display device provided with the same, and a manufacturing method of the same, and provides a substrate for a liquid crystal display device in which a manufacture process can be cut down and manufacturing cost is reduced, a liquid crystal display device provided with the same, and a manufacturing method of the same.
    Type: Grant
    Filed: April 24, 2008
    Date of Patent: August 24, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kunio Matsubara
  • Publication number: 20080204617
    Abstract: The invention relates to a substrate for a liquid crystal display device, a liquid crystal display device provided with the same, and a manufacturing method of the same, and provides a substrate for a liquid crystal display device in which a manufacture process can be cut down and manufacturing cost is reduced, a liquid crystal display device provided with the same, and a manufacturing method of the same.
    Type: Application
    Filed: April 24, 2008
    Publication date: August 28, 2008
    Applicant: SHARP KABUSHIKI KAISHA
    Inventor: Kunio Matsubara
  • Patent number: 7382420
    Abstract: The invention relates to a substrate for a liquid crystal display device, a liquid crystal display device provided with the same, and a manufacturing method of the same, and provides a substrate for a liquid crystal display device in which a manufacture process can be cut down and manufacturing cost is reduced, a liquid crystal display device provided with the same, and a manufacturing method of the same.
    Type: Grant
    Filed: March 20, 2003
    Date of Patent: June 3, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Kunio Matsubara