Patents by Inventor Shu Dong Li

Shu Dong Li 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).

  • Charge pump electronic ballast for use with low input voltage
    Patent number: 8368314
    Abstract: A charge pump electronic ballast for use with low input voltage is described. The charge pump electronic ballast includes a DC/AC inverter circuit having two switching transistors, a resonant circuit having an inductor and a capacitor. The charge pump electronic ballast further includes a voltage multiplying rectifying circuit for transforming low input AC voltage into high output DC voltage, and a charge pump circuit having an inductor and a first pump capacitor.
    Type: Grant
    Filed: January 28, 2008
    Date of Patent: February 5, 2013
    Assignee: OSRAM Gesellschaft mit beschraenkter Haftung
    Inventors: Wei Chen, Shu Dong Li
  • CHARGE PUMP ELECTRONIC BALLAST FOR USE WITH LOW INPUT VOLTAGE
    Publication number: 20110006700
    Abstract: A charge pump electronic ballast for use with low input voltage is described. The charge pump electronic ballast includes a DC/AC inverter circuit having two switching transistors, a resonant circuit having an inductor and a capacitor. The charge pump electronic ballast further includes a voltage multiplying rectifying circuit for transforming low input AC voltage into high output DC voltage, and a charge pump circuit having an inductor and a first pump capacitor.
    Type: Application
    Filed: January 28, 2008
    Publication date: January 13, 2011
    Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
    Inventors: Wei Chen, Shu Dong Li