公开(公告)号：US20190101744A1

公开(公告)日：2019-04-04

申请号：US15722444

申请日：2017-10-02

Applicant: STMicroelectronics Ltd

Inventor： Sivan Kinstlich ,  Offir Duvdevany

IPC: G02B26/08

Abstract: Described herein is a device including mirror control circuitry for controlling a movable mirror. The mirror control circuitry includes drive circuitry for providing a drive signal to the movable mirror, and a processor. The processor cause 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.

公开(公告)号：US11681140B2

公开(公告)日：2023-06-20

申请号：US16855301

申请日：2020-04-22

Applicant: STMicroelectronics Ltd

Inventor： Sivan Kinstlich ,  Offir Duvdevany

IPC: G02B26/08

CPC classification number: G02B26/0833

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.

公开(公告)号：US10684465B2

公开(公告)日：2020-06-16

申请号：US15722444

申请日：2017-10-02

Applicant: STMicroelectronics Ltd

Inventor： Sivan Kinstlich ,  Offir Duvdevany

IPC: G02B26/08

Abstract: Described herein is a device including mirror control circuitry for controlling a movable mirror. The mirror control circuitry includes drive circuitry for providing a drive signal to the movable mirror, and a processor. The processor cause 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.