公开(公告)号：US20200249465A1

公开(公告)日：2020-08-06

申请号：US16855301

申请日：2020-04-22

Applicant: STMicroelectronics Ltd

Inventor： Sivan KINSTLICH ,  Offir DUVDEVANY

IPC: G02B26/08

Abstract: Mirror control circuitry operates to control a movable mirror. The mirror control circuitry includes drive circuitry for providing a drive signal to the movable mirror, and a processor. The processor causes the drive circuitry to generate the drive signal so as to have pulses with leading edges occurring an offset period of time after a maximum opening angle of the movable mirror and trailing edges occurring an offset period of time before a zero crossing of the movable mirror. The processor may sample a mirror sense signal from the movable mirror at times at which a derivative of capacitance of the movable mirror with respect to time is zero, and then perform an action based upon the samples.