Patents by Inventor Ying Hsien Tsai

Ying Hsien 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).

  • Multiple CCFL current balancing scheme for single controller topologies
    Patent number: 6459216
    Abstract: The multiple lamp circuit for minimizing lamp current imbalance comprises at least one transformer comprising primary windings and secondary windings. Multiple lamps are coupled in serial to the secondary windings of the transformer. Multiple separated lamp drive circuits are spliced from the transformer's secondary windings. A current balancing resistance is connected at a common node of the multiple lamps and other terminal of the current balancing resistance is connected to ground. The impedance of the current balancing resistance is relatively high compared to the ones of the multiple lamps to generate a balancing current for one of the multiple lamps, thereby resulting a current that flows through the multiple lamps is approximately equal.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: October 1, 2002
    Assignee: Monolithic Power Systems, Inc.
    Inventor: Ying Hsien Tsai
  • Multiple CCFL current balancing scheme for single controller topologies
    Publication number: 20020125838
    Abstract: The multiple lamp circuit for minimizing lamp current imbalance comprises at least one transformer comprising primary windings and secondary windings. Multiple lamps are coupled in serial to the secondary windings of the transformer. Multiple separated lamp drive circuits are spliced from the transformer's secondary windings. A current balancing resistance is connected at a common node of the multiple lamps and other terminal of the current balancing resistance is connected to ground. The impedance of the current balancing resistance is relatively high compared to the ones of the multiple lamps to generate a balancing current for one of the multiple lamps, thereby resulting a current that flows through the multiple lamps is approximately equal.
    Type: Application
    Filed: April 16, 2001
    Publication date: September 12, 2002
    Inventor: Ying Hsien Tsai