Patents by Inventor Chao-Wei Tsai

Chao-Wei Tsai 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).

  • END OF LAMP LIFE PROTECTION CIRCUIT WITH BI-LEVEL DETECTIONS FOR THE ELECTRONIC BALLAST AND METHOD THEREOF
    Publication number: 20110156592
    Abstract: The configurations of an end of lamp life protection circuit for a ballast and a method thereof are provided in the present invention. The proposed circuit includes a voltage-dividing circuit receiving an input voltage and outputting a first and a second divided voltages and a switch apparatus raising the first divided voltage when the second divided voltage is less than a first pre-determined threshold value and turning off the ballast when the first divided voltage is higher than a second pre-determined threshold value.
    Type: Application
    Filed: December 29, 2010
    Publication date: June 30, 2011
    Applicant: Delta Electronics, Inc.
    Inventors: Ching-Ho Chou, Yung-Chuan Lu, Edy Chandra, Chao-Wei Tsai