Patents by Inventor Dayong QIAO

Dayong QIAO 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 circuit for obtaining capacitive feedback signal of capacitive feedback-type micro torsion mirror
    Patent number: 11402952
    Abstract: A method and circuit for obtaining a capacitive feedback signal of a capacitive feedback micro torsion mirror are provided to solve the problem of poor stability of the capacitive feedback signals of the micro torsion mirror. First, a pulse signal is used as a driving signal to drive the capacitive feedback micro torsion mirror to vibrate; it is ensured that the micro torsion mirror may twist freely for at least 0.5 cycles during an interval of two adjacent sets of driving pulses; secondly, the capacitive feedback signal of the capacitive feedback micro torsion mirror is extracted, and converted into a voltage signal; then, the voltage signal is amplified; and finally extracted during the interval of the two adjacent sets of driving pulses, and taken as a real capacitive feedback signal. A carrier generation circuit and a detection circuit are omitted, and the influence of the carrier generation circuit and the detection circuit on a capacitive feedback signal is eliminated.
    Type: Grant
    Filed: April 20, 2020
    Date of Patent: August 2, 2022
    Assignee: XI AN ZHISENSOR TECHNOLOGIES CO., LTD.
    Inventors: Changfeng Xia, Wenhui Zheng, Xiumin Song, Qiaoming You, Dayong Qiao
  • METHOD AND CIRCUIT FOR OBTAINING CAPACITIVE FEEDBACK SIGNAL OF CAPACITIVE FEEDBACK-TYPE MICRO TORSION MIRROR
    Publication number: 20220075465
    Abstract: A method and circuit for obtaining a capacitive feedback signal of a capacitive feedback micro torsion mirror are provided to solve the problem of poor stability of the capacitive feedback signals of the micro torsion mirror. First, a pulse signal is used as a driving signal to drive the capacitive feedback micro torsion mirror to vibrate; it is ensured that the micro torsion mirror may twist freely for at least 0.5 cycles during an interval of two adjacent sets of driving pulses; secondly, the capacitive feedback signal of the capacitive feedback micro torsion mirror is extracted, and converted into a voltage signal; then, the voltage signal is amplified; and finally extracted during the interval of the two adjacent sets of driving pulses, and taken as a real capacitive feedback signal. A carrier generation circuit and a detection circuit are omitted, and the influence of the carrier generation circuit and the detection circuit on a capacitive feedback signal is eliminated.
    Type: Application
    Filed: April 20, 2020
    Publication date: March 10, 2022
    Inventors: Changfeng XIA, Wenhui ZHENG, Xiumin SONG, Qiaoming YOU, Dayong QIAO