Patents by Inventor Paolo FRIGERIO

Paolo FRIGERIO 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).

  • Closed-loop position control of MEMS micromirrors
    Patent number: 11841497
    Abstract: Disclosed herein is a control system for a projection system, including a first subtractor receiving an input drive signal and a feedback signal and generating a first difference signal therefrom, the feedback signal being indicative of position of a quasi static micromirror of the projection system. A type-2 compensator receives the first difference signal and generates therefrom a first output signal. A derivative based controller receives the feedback signal and generates therefrom a second output signal. A second subtractor receives the first and second output signals and generates a second difference signal therefrom. The second difference signal serves to control a mirror driver of the projection system. A higher order resonance equalization circuit receives a pre-output signal from an analog front end of the projection system that is indicative of position of the quasi static micromirror, and generates the feedback signal therefrom.
    Type: Grant
    Filed: December 2, 2020
    Date of Patent: December 12, 2023
    Assignees: Politecnico Di Milano, STMicroelectronics S.r.l.
    Inventors: Paolo Frigerio, Giacomo Langfelder, Luca Molinari, Giuseppe Maiocchi, Andrea Barbieri
  • CLOSED-LOOP POSITION CONTROL OF MEMS MICROMIRRORS
    Publication number: 20220171180
    Abstract: Disclosed herein is a control system for a projection system, including a first subtractor receiving an input drive signal and a feedback signal and generating a first difference signal therefrom, the feedback signal being indicative of position of a quasi static micromirror of the projection system. A type-2 compensator receives the first difference signal and generates therefrom a first output signal. A derivative based controller receives the feedback signal and generates therefrom a second output signal. A second subtractor receives the first and second output signals and generates a second difference signal therefrom. The second difference signal serves to control a mirror driver of the projection system. A higher order resonance equalization circuit receives a pre-output signal from an analog front end of the projection system that is indicative of position of the quasi static micromirror, and generates the feedback signal therefrom.
    Type: Application
    Filed: December 2, 2020
    Publication date: June 2, 2022
    Applicants: Politecnico Di Milano, STMicroelectronics S.r.l.
    Inventors: Paolo FRIGERIO, Giacomo LANGFELDER, Luca MOLINARI, Giuseppe MAIOCCHI, Andrea BARBIERI