Patents by Inventor Chen-Yang Liu

Chen-Yang Liu 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).

  • Electronic ballast and controlling method thereof
    Patent number: 7176639
    Abstract: An improved electronic ballast for providing an electrical energy to a fluorescent lamp circuit is provided. It includes a pre-heating inductor; a first resonant circuit connected to the pre-heating inductor in parallel and coupled to the fluorescent lamp circuit for pre-heating the fluorescent lamp circuit according to a first resonant frequency; a second resonant circuit coupled to the fluorescent lamp circuit for igniting the fluorescent lamp circuit according to a second resonant frequency; and a driving circuit coupled to the second resonant circuit for continuously providing the electrical energy to the first resonant circuit and the second resonant circuit respectively according to the first resonant frequency and the second resonant frequency.
    Type: Grant
    Filed: June 8, 2004
    Date of Patent: February 13, 2007
    Assignee: Delta Electronics, Inc.
    Inventors: Xiao-Ju Hu, Chen-Yang Liu, Jian-Ping Ying
  • Electronic ballast and controlling method thereof
    Publication number: 20050179403
    Abstract: An improved electronic ballast for providing an electrical energy to a fluorescent lamp circuit is provided. It includes a pre-heating inductor; a first resonant circuit connected to the pre-heating inductor in parallel and coupled to the fluorescent lamp circuit for pre-heating the fluorescent lamp circuit according to a first resonant frequency; a second resonant circuit coupled to the fluorescent lamp circuit for igniting the fluorescent lamp circuit according to a second resonant frequency; and a driving circuit coupled to the second resonant circuit for continuously providing the electrical energy to the first resonant circuit and the second resonant circuit respectively according to the first resonant frequency and the second resonant frequency.
    Type: Application
    Filed: June 8, 2004
    Publication date: August 18, 2005
    Inventors: Xiao-Ju Hu, Chen-Yang Liu, Jian-Ping Ying