Patents by Inventor Ming-ju Sung

Ming-ju Sung 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).

  • Method and system for processing fingerprint sensing signals and fingerprint identification terminal
    Patent number: 9940501
    Abstract: The present invention relates to the field of fingerprint identification technologies, and provides a method and a system for processing fingerprint sensing signals, and a fingerprint identification terminal. The method includes a frequency mixing step by mixing a collected high frequency fingerprint sensing signal with a first high frequency signal to obtain a low frequency signal; and an amplification step by amplifying the low frequency signal. By using the character that capacitance impedance is inversely proportional to signal frequency, the present invention shifts a fingerprint sensing signal with a high frequency into a signal with a low frequency through frequency spectrum shifting and performs signal amplification on the signal with a low frequency, which can overcome the difficulty in amplifying the high frequency fingerprint sensing signal and thus improves the signal-to-noise ratio SNR.
    Type: Grant
    Filed: October 9, 2014
    Date of Patent: April 10, 2018
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Meng-Ta Yang, Ming-ju Sung
  • PROCESSING METHOD AND SYSTEM FOR FINGERPRINT SENSING SIGNAL AND FINGERPRINT RECOGNITION TERMINAL
    Publication number: 20170147860
    Abstract: The present invention relates to the field of fingerprint identification technologies, and provides a method and a system for processing fingerprint sensing signals, and a fingerprint identification terminal. The method includes a frequency mixing step by mixing a collected high frequency fingerprint sensing signal with a first high frequency signal to obtain a low frequency signal; and an amplification step by amplifying the low frequency signal. By using the character that capacitance impedance is inversely proportional to signal frequency, the present invention shifts a fingerprint sensing signal with a high frequency into a signal with a low frequency through frequency spectrum shifting and performs signal amplification on the signal with a low frequency, which can overcome the difficulty in amplifying the high frequency fingerprint sensing signal and thus improves the signal-to-noise ratio SNR.
    Type: Application
    Filed: October 9, 2014
    Publication date: May 25, 2017
    Inventors: Meng-Ta Yang, Ming-ju Sung