Patents by Inventor Yasuhiro Iwashita

Yasuhiro Iwashita 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: 9142378
    Abstract: An arrangement area of a transformer drive circuit, an arrangement area of a high-voltage transformer, and an arrangement area of an ion generating unit are two-dimensionally divided from each other in a casing. A connection terminal is electrically connected to the transformer drive circuit and is formed of a conductive film arranged to be exposed to the outside of the casing. Accordingly, an ion generating device whose size and thickness can be easily reduced and an electrical apparatus including the ion generating device can be provided.
    Type: Grant
    Filed: July 12, 2011
    Date of Patent: September 22, 2015
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yoshinori Sekoguchi, Minako Sugano, Yasuhiro Iwashita
  • Publication number: 20130146781
    Abstract: An arrangement area of a transformer drive circuit, an arrangement area of a high-voltage transformer, and an arrangement area of an ion generating unit are two-dimensionally divided from each other in a casing. A connection terminal is electrically connected to the transformer drive circuit and is formed of a conductive film arranged to be exposed to the outside of the casing. Accordingly, an ion generating device whose size and thickness can be easily reduced and an electrical apparatus including the ion generating device can be provided.
    Type: Application
    Filed: July 12, 2011
    Publication date: June 13, 2013
    Applicant: SHARP KABUSHIKI KAISHA
    Inventors: Yoshinori Sekoguchi, Minako Sugano, Yasuhiro Iwashita
  • Patent number: 8049170
    Abstract: An ion generation element includes an induction electrode and a plurality of discharge electrodes. The induction electrode is formed of one metal plate. A circumferential portion of a through hole is bent, and a thickness of a wall portion of the through hole is greater than a thickness of a top plate portion. A needle-like tip end of the discharge electrode is located within a range of the thickness of the through hole. Thus, an induction electrode having a structure realizing a small thickness, capable of lessening variation in an amount of ion generation caused by variation in positional relation between the tip end of the discharge electrode and the induction electrode, an ion generation element, an ion generation apparatus, and electric equipment can be obtained.
    Type: Grant
    Filed: May 1, 2007
    Date of Patent: November 1, 2011
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshinori Sekoguchi, Yasuhiro Iwashita
  • Publication number: 20090140164
    Abstract: An ion generation element includes an induction electrode and a plurality of discharge electrodes. The induction electrode is formed of one metal plate. A circumferential portion of a through hole is bent, and a thickness of a wall portion of the through hole is greater than a thickness of a top plate portion . A needle-like tip end of the discharge electrode is located within a range of the thickness of the through hole. Thus, an induction electrode having a structure realizing a small thickness, capable of lessening variation in an amount of ion generation caused by variation in positional relation between the tip end of the discharge electrode and the induction electrode, an ion generation element, an ion generation apparatus, and electric equipment can be obtained.
    Type: Application
    Filed: May 1, 2007
    Publication date: June 4, 2009
    Inventors: Yoshinori Sekoguchi, Yasuhiro Iwashita
  • Patent number: 7400126
    Abstract: In a DC regulated power supply realized as AC adapter or the like by a switching power supply, a reference voltage correction circuit, which estimates a voltage drop corresponding to a load current, corrects to increase an output voltage by changing a feedback reference value for regulation of the output voltage from a reference voltage source, in accordance with the load current sensed by the load current sensing circuit. Therefore, there occurs no negative effects that would be caused when output sensing wires are routed to a remote load. In addition, unlike the arrangement in which a reference-use rectifying circuit as well as a load-use rectifying circuit are provided, the arrangement of the switching power supply is not complicated. That is, in correcting a voltage drop, which occurs in power supply lines, corresponding to the load current, it is possible to easily perform a stable output voltage control unaffected by wire routing.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: July 15, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasuhiro Iwashita
  • Patent number: 7400063
    Abstract: The switched-mode power supply includes an output value sensor circuit measuring a current flow through a switching device and a switching control circuit implementing overcurrent protection. Also included in the power supply are: a second output voltage sensor circuit detecting a high output voltage for the second load; and a short-circuit device quasi-shorting the terminals of the second load when the detected value of the voltage is more than or equal to a specific value. Therefore, if the short-circuit device shorts out, the secondary load increases, and the output for the relatively low load can be restrained by overcurrent protection. Thus, a reliable overcurrent protection can be achieved using a simple construction by means of cross-regulation.
    Type: Grant
    Filed: November 18, 2003
    Date of Patent: July 15, 2008
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Yasuhiro Iwashita
  • Publication number: 20050018457
    Abstract: In a DC regulated power supply realized as AC adapter or the like by a switching power supply, a reference voltage correction circuit, which estimates a voltage drop corresponding to a load current, corrects to increase an output voltage by changing a feedback reference value for regulation of the output voltage from a reference voltage source, in accordance with the load current sensed by the load current sensing circuit. Therefore, there occurs no negative effects that would be caused when output sensing wires are routed to a remote load. In addition, unlike the arrangement in which a reference-use rectifying circuit as well as a load-use rectifying circuit are provided, the arrangement of the switching power supply is not complicated. That is, in correcting a voltage drop, which occurs in power supply lines, corresponding to the load current, it is possible to easily perform a stable output voltage control unaffected by wire routing.
    Type: Application
    Filed: July 7, 2004
    Publication date: January 27, 2005
    Inventor: Yasuhiro Iwashita
  • Publication number: 20040100740
    Abstract: The switched-mode power supply includes an output value sensor circuit measuring a current flow through a switching device and a switching control circuit implementing overcurrent protection. Also included in the power supply are: a second output voltage sensor circuit detecting a high output voltage Vo2 for the second load; and a short-circuit device 18 quasi-shorting the terminals of the second load when the detected value of the voltage is more than or equal to a specific value. Therefore, if the short-circuit device 18 shorts out, the secondary load increases, and the output for the relatively low load L1 can be restrained by overcurrent protection. Thus, a reliable overcurrent protection can be achieved using a simple construction by means of cross-regulation, without a complex arrangement where a separate current sensor circuit is provided to each output of the secondaries to terminate or control the outputs independently from each other based on the detected current values.
    Type: Application
    Filed: November 18, 2003
    Publication date: May 27, 2004
    Inventor: Yasuhiro Iwashita