Patents by Inventor Yuuto HAKAMADA

Yuuto HAKAMADA 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).

  • Power supply controlling device, power supply device, image forming apparatus, and power supply controlling method
    Patent number: 9703252
    Abstract: A power supply controlling device includes: a direct-current power supply configured to output a direct-current voltage; an alternating-current power supply configured to output one selected from between a superimposed voltage obtained by superimposing an alternating-current voltage onto the direct-current voltage and the direct-current voltage; a bypass capacitor configured to partially store therein an output from the alternating-current power supply and configured to, when the direct-current voltage is output from the direct-current power supply while no electric charge is stored therein, store therein a second direct current being a part of a first direct current output from the direct-current power supply in conjunction with the output of the direct-current voltage; and a power supply controlling unit configured to cause the direct-current power supply to control a level of the direct-current voltage based on a target value for the first direct current and a value indicating the second direct current.
    Type: Grant
    Filed: July 19, 2016
    Date of Patent: July 11, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuuto Hakamada, Masahide Nakaya, Jyunya Sakuraba
  • POWER SUPPLY CONTROLLING DEVICE, POWER SUPPLY DEVICE, IMAGE FORMING APPARATUS, AND POWER SUPPLY CONTROLLING METHOD
    Publication number: 20170023904
    Abstract: A power supply controlling device includes: a direct-current power supply configured to output a direct-current voltage; an alternating-current power supply configured to output one selected from between a superimposed voltage obtained by superimposing an alternating-current voltage onto the direct-current voltage and the direct-current voltage; a bypass capacitor configured to partially store therein an output from the alternating-current power supply and configured to, when the direct-current voltage is output from the direct-current power supply while no electric charge is stored therein, store therein a second direct current being a part of a first direct current output from the direct-current power supply in conjunction with the output of the direct-current voltage; and a power supply controlling unit configured to cause the direct-current power supply to control a level of the direct-current voltage based on a target value for the first direct current and a value indicating the second direct current.
    Type: Application
    Filed: July 19, 2016
    Publication date: January 26, 2017
    Inventors: Yuuto HAKAMADA, Masahide NAKAYA, Jyunya SAKURABA