Patents by Inventor KUN-TAN TSAI

KUN-TAN 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).

  • Powered device capable of working in continuation in case of power failure
    Patent number: 8541908
    Abstract: An exemplary powered device (PD) connected to a local power source and a power sourcing equipment (PSE) includes a constant current source drawing at least 10 mA direct current from the PSE when the local power source is in operation. The PD includes a first conversion circuit, a first diode, and a second diode. The first conversion circuit comprises a first input and is configured for converting a voltage input to the first input into the rated working voltage of the PD. The positive terminal of the first diode is connected to the local power source and the negative terminal thereof is connected to the first input. The voltage of the local power source is higher than that of the PSE.
    Type: Grant
    Filed: December 31, 2009
    Date of Patent: September 24, 2013
    Assignee: Hon Hai Precision Industry Co., Ltd.
    Inventor: Kun-Tan Tsai
  • POWERED DEVICE
    Publication number: 20110119506
    Abstract: An exemplary powered device (PD) connected to a local power source and a power sourcing equipment (PSE) includes a constant current source drawing at least 10 mA direct current from the PSE when the local power source is in operation. The PD includes a first conversion circuit, a first diode, and a second diode. The first conversion circuit comprises a first input and is configured for converting a voltage input to the first input into the rated working voltage of the PD. The positive terminal of the first diode is connected to the local power source and the negative terminal thereof is connected to the first input. The voltage of the local power source is higher than that of the PSE.
    Type: Application
    Filed: December 31, 2009
    Publication date: May 19, 2011
    Applicant: HON HAI PRECISION INDUSTRY CO., LTD.
    Inventor: KUN-TAN TSAI