Patents by Inventor Pei-Cheng Haung

Pei-Cheng Haung 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).

  • Direct current light emitting device control circuit with dimming function and method thereof
    Publication number: 20120062136
    Abstract: The present invention discloses a direct current (DC) light emitting device control circuit with dimming function, and a method thereof, wherein the dimming function is provided in a feedback loop for feeding back a feedback signal from an output terminal to a power switch control circuit; the feedback signal relates to an output current supplied to the DC light emitting device. The present invention adjusts the feedback signal according to the desired brightness of the DC light emitting device. The present invention controls a power switch according to the adjusted feedback signal, such that the output current supplied to the DC light emitting device is adjusted, and accordingly the brightness of the DC light emitting device is adjusted below the full brightness.
    Type: Application
    Filed: June 22, 2011
    Publication date: March 15, 2012
    Inventors: Fu-Sheng Tsai, Pei-Cheng Haung