Patents by Inventor Xingzhu Zhang

Xingzhu Zhang 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).

  • Method and device for decorating fingernails with multicolored designs
    Publication number: 20070092634
    Abstract: The present invention relates to a body painting method mainly used in nail beautifying for simultaneously creating a plurality of patterns, and a specialized computer-controlled body-painting machine for realizing the method.
    Type: Application
    Filed: April 29, 2005
    Publication date: April 26, 2007
    Inventor: Xingzhu Zhang
  • Self-driving circuit for a DC/DC converter
    Patent number: 6839246
    Abstract: The present invention provides a self-driving circuit of a low voltage, large current, and high power density DC/DC converter. The converter comprises a transformer, power MOS transistors (S), output rectification portion (SRb 1, SR2), filter portion and demagnetizing portion. The first configuration of the self-driving circuit consists of Da, Ra, Ca, Qa for self-driving SR2; and the second configuration consists of Da, Ra, Sa, a delay driving circuit and an isolation differential circuit, for self-driving SR2. The self-driving circuit of the present invention may reduce the cross-conductive loss, and increase the converting efficiency.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: January 4, 2005
    Assignee: Emerson Network Power Co., Ltd.
    Inventors: Xingzhu Zhang, Xiaopeng Dong
  • Self-driving circuit for a DC/DC converter
    Patent number: 6678172
    Abstract: The present invention provides a self-driving circuit for DC/DC converter of a low voltage, high current, and high power density. The converter comprises a transformer, output rectification portion SR1 and voltage clamping. The first configuration of the self-driving circuit consists of resisters Ra1, Ra2, capacitors Ca1, Ca2, transistors Qa1, Qa2; and the second configuration consists of Da, small power MOS transistor SRa, an auxiliary winding Nsa, a delay driving circuit and a isolating differential circuit. The self-driving circuit of the present invention may reduce the cross-conductive loss, and increase the converting efficiency.
    Type: Grant
    Filed: June 26, 2002
    Date of Patent: January 13, 2004
    Assignee: Emerson Network Power Co., Ltd.
    Inventors: Xingzhu Zhang, Xiaopeng Dong