Patents by Inventor Yuan-Wei Cheng

Yuan-Wei Cheng 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).

  • Thermoelectric sensor for fingerprint thermal imaging
    Patent number: 7406185
    Abstract: The present invention provides a fingerprint sensing mechanism using a two-dimensional thermoelectric sensor array to capture the thermal image related to the ridges and valleys on the finger, wherein its fabricating method is totally compatible with integrated circuits processing. Using the body temperature of a human being as the stimulation source for biometrics, a temperature difference is produced from a ridge of a fingerprint contacting the thermoelectric sensor and the temperature gradient is converted into an electrical signal. A plurality of thermoelectric sensors arranged in a two-dimensional array forms a fingerprint sensor so as to obtain the electrical signal output of the ridge profile of the fingerprint.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: July 29, 2008
    Assignee: Ligh Tuning Technology Inc.
    Inventors: Bruce C. S. Chou, Yuan-Wei Cheng, Ching-Fu Tsou, Ming-Lin Tsai
  • Thermoelectric sensor for fingerprint thermal imaging
    Publication number: 20040208345
    Abstract: The present invention provides a fingerprint sensing mechanism using a two-dimensional thermoelectric sensor array to capture the thermal image related to the ridges and valleys on the finger, wherein its fabricating method is totally compatible with integrated circuits processing. Using the body temperature of a human being as the stimulation source for biometrics, a temperature difference is produced from a ridge of a fingerprint contacting the thermoelectric sensor and the temperature gradient is converted into an electrical signal. A plurality of thermoelectric sensors arranged in a two-dimensional array forms a fingerprint sensor so as to obtain the electrical signal output of the ridge profile of the fingerprint.
    Type: Application
    Filed: April 16, 2003
    Publication date: October 21, 2004
    Inventors: Bruce C. S. Chou, Yuan-Wei Cheng, Ching-Fu Tsou, Ming-Lin Tsai