Patents by Inventor Ping-Hua Xu

Ping-Hua Xu 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).

  • Over-voltage protection system and electronic device using the same
    Patent number: 8284532
    Abstract: An over-voltage protection system is connected between a power supply and two working circuits of an electronic device, and includes a first over-voltage protection circuit, a second over-voltage protection circuit, and a voltage load circuit. The over-voltage protection system detects voltage of the power supply, isolates the power supply from a first working circuit when the power supply exceeds a first predetermined voltage value, and isolates the power supply from a second working circuit when the voltage of the power supply exceeds a second predetermined voltage value and is lower than the first predetermined voltage value. The voltage load circuit bears partial voltage of the power supply to provide necessary power to the second working circuit when the voltage of the power supply exceeds a second predetermined voltage value and is lower than the first predetermined voltage value.
    Type: Grant
    Filed: May 3, 2010
    Date of Patent: October 9, 2012
    Assignees: Hong Fu Jin Precision Industry (ShenZhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Lei Yu, Ping-Hua Xu
  • OVER-VOLTAGE PROTECTION SYSTEM AND ELECTRONIC DEVICE USING THE SAME
    Publication number: 20110216460
    Abstract: An over-voltage protection system is connected between a power supply and two working circuits of an electronic device, and includes a first over-voltage protection circuit, a second over-voltage protection circuit, and a voltage load circuit. The over-voltage protection system detects voltage of the power supply, isolates the power supply from a first working circuit when the power supply exceeds a first predetermined voltage value, and isolates the power supply from a second working circuit when the voltage of the power supply exceeds a second predetermined voltage value and is lower than the first predetermined voltage value. The voltage load circuit bears partial voltage of the power supply to provide necessary power to the second working circuit when the voltage of the power supply exceeds a second predetermined voltage value and is lower than the first predetermined voltage value.
    Type: Application
    Filed: May 3, 2010
    Publication date: September 8, 2011
    Applicants: HONG FU JIN PRECISION INDUSTRY (ShenZhen) CO., LTD ., HON HAI PRECISION INDUSTRY CO., LTD.
    Inventors: LEI YU, PING-HUA XU