Patents by Inventor Kwanghoon CHEON

Kwanghoon CHEON 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).

  • Defect detection in high voltage power supply apparatus
    Patent number: 11372031
    Abstract: A high voltage power supply apparatus includes: a comparator, a transformer, a rectifier, and a detector. The comparator is to control output of a basic voltage. A high voltage based on the basic voltage is used to perform an image forming job in an image forming apparatus. The transformer is to output an alternating current voltage of a second side of the transformer by amplifying an alternating current voltage of a first side of the transformer, the amplifying being based on a resonance phenomenon induced from the basic voltage. The rectifier is to output the high voltage by rectifying the alternating current voltage of the second side. The detector is to sense a voltage applied to the comparator and a voltage applied to the transformer, and is to output operational state information of the high voltage power supply apparatus based on the sensed voltages.
    Type: Grant
    Filed: September 11, 2019
    Date of Patent: June 28, 2022
    Assignee: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Kwanghoon Cheon, Jinyun Park, Jonghwa Cho
  • DEFECT DETECTION IN HIGH VOLTAGE POWER SUPPLY APPARATUS
    Publication number: 20210356498
    Abstract: A high voltage power supply apparatus includes: a comparator, a transformer, a rectifier, and a detector. The comparator is to control output of a basic voltage. A high voltage based on the basic voltage is used to perform an image forming job in an image forming apparatus. The transformer is to output an alternating current voltage of a second side of the transformer by amplifying an alternating current voltage of a first side of the transformer, the amplifying being based on a resonance phenomenon induced from the basic voltage. The rectifier is to output the high voltage by rectifying the alternating current voltage of the second side. The detector is to sense a voltage applied to the comparator and a voltage applied to the transformer, and is to output operational state information of the high voltage power supply apparatus based on the sensed voltages.
    Type: Application
    Filed: September 11, 2019
    Publication date: November 18, 2021
    Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.
    Inventors: Kwanghoon CHEON, Jinyun PARK, Jonghwa CHO