Patents by Inventor Claud Gan

Claud Gan 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).

  • Driving circuit having a power factor correction (PFC) function
    Patent number: 8581509
    Abstract: A driving circuit having a power factor correction (PFC) function includes a power converter, a harmonic wave generator, a voltage divider, and a modify element. The power converter receives AC power to convert to DC power. The harmonic wave generator generates a harmonic wave from the DC power. The voltage level of the harmonic wave is decreased by the voltage divider to generate a comparing signal. The modify element compares the comparing signal and a feedback current signal of the LED to regulate the DC power accordingly for power-supplying the LED stably. Therefore the power factor (PF) of the driving circuit is enhanced.
    Type: Grant
    Filed: December 2, 2010
    Date of Patent: November 12, 2013
    Assignee: U-Tel Technology Co., Ltd.
    Inventors: Hsin-Hui Cheng, Claud Gan
  • DRIVING CIRCUIT HAVING A POWER FACTOR CORRECTION (PFC) FUNCTION
    Publication number: 20120139447
    Abstract: A driving circuit having a power factor correction (PFC) function includes a power converter, a harmonic wave generator, a voltage divider, and a modify element. The power converter receives AC power to convert to DC power. The harmonic wave generator generates a harmonic wave from the DC power. The voltage level of the harmonic wave is decreased by the voltage divider to generate a comparing signal. The modify element compares the comparing signal and a feedback current signal of the LED to regulate the DC power accordingly for power-supplying the LED stably. Therefore the power factor (PF) of the driving circuit is enhanced.
    Type: Application
    Filed: December 2, 2010
    Publication date: June 7, 2012
    Inventors: Hsin-Hui Cheng, Claud Gan