公开(公告)号：US11841497B2

公开(公告)日：2023-12-12

申请号：US17109929

申请日：2020-12-02

Applicant: Politecnico Di Milano ,  STMicroelectronics S.r.l.

Inventor： Paolo Frigerio ,  Giacomo Langfelder ,  Luca Molinari ,  Giuseppe Maiocchi ,  Andrea Barbieri

IPC: G02B26/08 ,  H04N9/31 ,  G09G3/02 ,  G05B5/01 ,  H03G1/00

CPC classification number: G02B26/0833 ,  G05B5/01 ,  G09G3/025 ,  H03G1/0005 ,  H04N9/3135

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.