Patents by Inventor Vinhphu Tran

Vinhphu Tran 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).

  • LIGHT EMITTING DIODE MULTIPHASE DRIVER CIRCUIT AND METHOD
    Publication number: 20060175985
    Abstract: A method and a circuit for driving light emitting diodes (LEDs) in multiphase are provided. A string of LEDs divided into groups connected to each other in series is provided. Each group is coupled to ground through separate conductive paths. A phase switch is provided in each conductive path. Increasing the input voltage turn on the string of LEDs, group by group in the sequence downstream the string. To reduce power dissipation, the phase switch of an upstream group is turned off when next downstream group is turned on.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventors: Kimlong Huynh, Vinhphu Tran