Patents by Inventor Liang-An Chen

Liang-An Chen 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).

  • Controlling circuit for configuring ring indicator pin of communication port
    Patent number: 7975154
    Abstract: A controlling circuit for a communication port having a ring indicator (RI) pin is provided. The controlling circuit includes a first selection circuit and a second selection circuit. The first selection circuit is controlled by a basic input/output system (BIOS) for determining whether an RI signal is transmitted to the RI pin. The second selection circuit is controlled by the BIOS for determining whether a first voltage or a second voltage is transmitted to the RI pin.
    Type: Grant
    Filed: September 18, 2007
    Date of Patent: July 5, 2011
    Assignee: Quanta Computer Inc.
    Inventors: Wen-Chung Hsu, Liang-An Chen, Ming-Yen Shen
  • POWER MANAGEMENT DEVICE AND POINT OF SALES TERMINAL APPARATUS USING THEREOF
    Publication number: 20100318814
    Abstract: A point of sales (POS) terminal apparatus including a POS device, a peripheral device, which is controlled by the POS device, an adapter, and a power management device is provided. The adapter provides a first power signal based on a wall-outlet power signal. The power management device provides the first power signal to drive the POS device and determines whether the first power signal satisfies a predetermined condition. When the first power signal fails to satisfy the predetermined condition, the power management device generates a second power signal and drives the peripheral device with the second power signal. When the first power signal satisfies the predetermined condition, the power management device drives the peripheral device with the first power signal.
    Type: Application
    Filed: June 10, 2009
    Publication date: December 16, 2010
    Applicant: Quanta Computer Inc.
    Inventors: Yann-Lang Chung, Liang-An Chen, Kuo-Chan Hsu, Ming-Yen Shen
  • Controlling circuit for communication port
    Publication number: 20080282075
    Abstract: A controlling circuit for a communication port having a ring indicator (RI) pin is provided. The controlling circuit includes a first selection circuit and a second selection circuit. The first selection circuit is controlled by a basic input/output system (BIOS) for determining whether an RI signal is transmitted to the RI pin. The second selection circuit is controlled by the BIOS for determining whether a first voltage or a second voltage is transmitted to the RI pin.
    Type: Application
    Filed: September 18, 2007
    Publication date: November 13, 2008
    Applicant: Quanta Computer Inc.
    Inventors: Wen-Chung Hsu, Liang-An Chen, Ming-Yen Shen