Patents by Inventor Yanshun Xue

Yanshun Xue 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).

  • Detect method for step dimming selection
    Patent number: 8836238
    Abstract: A detect method is provided for performing step dimming selection in an electronic ballast including an End of Lamp Life detect circuit and a half-bridge inverter, the End of Lamp Life detect circuit being connected to an input terminal of the control circuit, wherein each time when the power switch is turned on, it is judged whether the electronic ballast should enter the dimming mode or not by detecting the voltage at the input terminal of the control circuit before the half-bridge inverter starts operating.
    Type: Grant
    Filed: June 12, 2008
    Date of Patent: September 16, 2014
    Assignee: Osram Gesellschaft mit beschraenkter Haftung
    Inventors: Wei Gao, Markus Heckmann, Rene Twardzik, Yanshun Xue
  • Circuit for driving fluorescent lamp and light-emitting diode
    Patent number: 8664879
    Abstract: Proposed is a circuit for driving a fluorescent lamp and a light-emitting diode. The circuit may include an inverter; a fluorescent lamp driving branch for driving a fluorescent lamp; a light-emitting diode driving branch for driving a light-emitting diode; a starting branch; and an alternate control branch. By using a simple circuit structure, various embodiments may realize a circuit capable of conveniently and alternately driving a fluorescent lamp and a light-emitting diode.
    Type: Grant
    Filed: April 2, 2012
    Date of Patent: March 4, 2014
    Assignee: OSRAM AG
    Inventors: Wei Chen, Yanshun Xue, Yilong Ye, Guoji Zhong
  • Filament detection circuit
    Patent number: 8659240
    Abstract: Provided is a circuit for detecting a filament of a fluorescent lamp, wherein a first end of a first filament is connected to a second end of the first filament via an oscillation circuit, and the first end of the first filament is connected to an output of an inverter; a first end of a second filament is connected to a second end of the second filament via an oscillation circuit, wherein the first end of the second filament is connected to an internal ground; the second end of the second filament is connected to a power source, and a voltage at the second end of the second filament is used for controlling ON and OFF of an MOSFET, wherein a source of the MOSFET is connected to the internal ground.
    Type: Grant
    Filed: March 23, 2012
    Date of Patent: February 25, 2014
    Assignee: OSRAM AG
    Inventors: Junying Wang, Yanshun Xue, Yilong Ye, Guoji Zhong
  • Filament Detection Circuit
    Publication number: 20120313549
    Abstract: Provided is a circuit for detecting a filament of a fluorescent lamp, wherein a first end of a first filament is connected to a second end of the first filament via an oscillation circuit, and the first end of the first filament is connected to an output of an inverter; a first end of a second filament is connected to a second end of the second filament via an oscillation circuit, wherein the first end of the second filament is connected to an internal ground; the second end of the second filament is connected to a power source, and a voltage at the second end of the second filament is used for controlling ON and OFF of an MOSFET, wherein a source of the MOSFET is connected to the internal ground.
    Type: Application
    Filed: March 23, 2012
    Publication date: December 13, 2012
    Applicant: OSRAM AG
    Inventors: Junying Wang, Yanshun Xue, Yilong Ye, Guoji Zhong
  • Circuit for driving fluorescent lamp and light-emitting diode
    Publication number: 20120248994
    Abstract: Proposed is a circuit for driving a fluorescent lamp and a light-emitting diode. The circuit may include an inverter; a fluorescent lamp driving branch for driving a fluorescent lamp; a light-emitting diode driving branch for driving a light-emitting diode; a starting branch; and an alternate control branch. By using a simple circuit structure, various embodiments may realize a circuit capable of conveniently and alternately driving a fluorescent lamp and a light-emitting diode.
    Type: Application
    Filed: April 2, 2012
    Publication date: October 4, 2012
    Applicant: OSRAM AG
    Inventors: Wei Chen, Yanshun Xue, Yilong Ye, Guoji Zhong
  • DETECT METHOD FOR STEP DIMMING SELECTION
    Publication number: 20100213848
    Abstract: A detect method is provided for performing step dimming selection in an electronic ballast including an End of Lamp Life detect circuit and a half-bridge inverter, the End of Lamp Life detect circuit being connected to an input terminal of the control circuit, wherein each time when the power switch is turned on, it is judged whether the electronic ballast should enter the dimming mode or not by detecting the voltage at the input terminal of the control circuit before the half-bridge inverter starts operating.
    Type: Application
    Filed: June 12, 2008
    Publication date: August 26, 2010
    Applicant: OSRAM GESELLSCHAFT MIT BESCHRAENKTER HAFTUNG
    Inventors: Wei Gao, Markus Heckmann, Rene Twardzik, Yanshun Xue