公开(公告)号：US10261312B2

公开(公告)日：2019-04-16

申请号：US15589542

申请日：2017-05-08

Applicant: STMicroelectronics Ltd

Inventor： Elik Haran

IPC: G02B26/08 ,  G02B26/10 ,  B81B7/00

Abstract: An electronic device disclosed herein includes a mirror controller configured to generate a drive control signal, with a drive circuit configured to generate a drive signal for a movable mirror based upon the drive control signal. A sensing circuit is configured to sense the drive signal. The mirror controller is further configured to adjust the drive control signal as a function of the sensed drive signal.

公开(公告)号：US20180129036A1

公开(公告)日：2018-05-10

申请号：US15348087

申请日：2016-11-10

Applicant: STMicroelectronics Ltd

Inventor： Elik Haran ,  Gilad Adler

IPC: G02B26/08 ,  G02B26/10 ,  B81B3/00 ,  G01R31/28

CPC classification number: G02B26/085 ,  B81B3/0059 ,  B81B2201/042 ,  G01R31/2829 ,  G01R31/44 ,  G02B26/105

Abstract: Disclosed herein is a circuit for determining failure of a movable MEMS mirror. The circuit includes a mirror position sensor associated with the movable MEMS mirror and that generates an analog output as a function of angular position of the movable MEMS mirror. An analog to digital converter converts the analog output from the mirror position sensor to a digital mirror sense signal. Failure detection circuitry calculates a difference between the digital mirror sense signal at a first instant in time and the digital mirror sense signal at a second instant in time, determines whether the difference exceeds a threshold, and indicates failure of the movable MEMS mirror as a function of the difference failing to exceed the threshold.