公开(公告)号：US20220171180A1

公开(公告)日：2022-06-02

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 ,  B06B1/02

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.