Patents by Inventor Ron Shu Yuen Hui

Ron Shu Yuen Hui 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).

  • Novel structures for electronically-controlled compact fluorescent lamps
    Publication number: 20020171355
    Abstract: Novel structures for electronically-controlled integral compact fluorescent lamps are described in which the space defined by a folded discharge tube is used to locate a housing for at least a part of the electronic-control circuitry. The housing is provided with ventilation means to allow the escape of heated air from the interior of the housing. This reduces the size of the lamp, and allows temperature sensitive components to be located in a relatively cool region. The housing can be provided with a reflective coating to improve the illumination uniformity, and if made of metal can act as a heat sink.
    Type: Application
    Filed: April 22, 2002
    Publication date: November 21, 2002
    Applicant: E.Energy Technology Limited
    Inventors: Ron Shu Yuen Hui, Henry Shu-Hung Chung
  • Novel structures for electronically-controlled compact fluorescent lamps
    Publication number: 20020145378
    Abstract: Novel structures for electronically-controlled compact fluorescent lamps are described in which the space defined by a folded discharge tube is used to locate a housing for at least a part of the electronic-control circuitry. This reduces the size of the lamp, and allows temperature sensitive components to be located in a relatively cool region. The housing can be provided with a reflective coating to improve the illumination uniformity, and if made of metal can act as a heat sink.
    Type: Application
    Filed: April 4, 2001
    Publication date: October 10, 2002
    Inventors: Ron Shu Yuen Hui, Henry Shu-Hung Chung
  • Universal electronic ballast
    Patent number: 6414449
    Abstract: An electronic ballast is disclosed that is capable of operating with any fluorescent lamp within a range of nominal operating powers. The electronic ballast is capable of sensing the power rating of the lamp from the peak lamp voltage, and provides for varying the switching frequency of the ballast depending on the power rating of the lamp.
    Type: Grant
    Filed: November 22, 2000
    Date of Patent: July 2, 2002
    Assignee: City University of Hong Kong
    Inventors: Ron Shu Yuen Hui, Leung Ming Lee
  • Dimmable electronic ballast
    Publication number: 20020033679
    Abstract: This invention relates to dimmable electronic ballasts for particular use with fluorescent lamps.
    Type: Application
    Filed: June 15, 2001
    Publication date: March 21, 2002
    Inventors: Ron Shu-Yuen Hui, Henry Shu-hung Chung, Eric Ho, Stephen Tsz-sek Lee
  • Voltage sensorless control of power converters
    Patent number: 6297621
    Abstract: Apparatus and methods are described for the voltage control of power converters in which the input and output voltages of the converter are not sensed directly but are derived from an inductor voltage which in turn is derived by sensing an instantaneous inductor current.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: October 2, 2001
    Assignee: City University of Hong Kong
    Inventors: Ron Shu-Yuen Hui, Henry Shu-Hung Chung