Patents by Inventor Leaf Chen

Leaf Chen 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).

  • CIRCUIT AND METHOD FOR DRIVING LIGHT SOURCE
    Publication number: 20080074061
    Abstract: A driving circuit for a light source is provided. The circuit is suitable for a light source with a plurality of light emitting diodes (LED). The circuit includes a first pulse width modulation (PWM) unit and a power conversion unit. The first PWM unit generates a first PWM signal. The power conversion unit generates a driving voltage signal for controlling the light source to perform forward bias operation or reversed bias operation according to the duty cycle of the first PWM signal.
    Type: Application
    Filed: December 1, 2006
    Publication date: March 27, 2008
    Applicant: BEYOND INNOVATION TECHNOLOGY CO., LTD.
    Inventors: Leaf Chen, Chin-Fa Kao