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公开(公告)号：US11474425B2
公开(公告)日：2022-10-18
申请号：US16540557
申请日：2019-08-14
Applicant: STMicroelectronics LTD
Inventor： Eli Yaser , Guy Amor , Yotam Nachmias , Dadi Sharon , Sivan Nagola
Abstract: A control circuit includes a first control circuit generating a first drive control signal from a pre-drive signal (that is a frequency at which an opening angle of the first and second mirrors is equal) for the first mirror. A second control circuit generates a second drive control signal from the pre-drive signal for the second mirror. First and second drivers generate first and second drive signals for the first and second mirrors from the first and second drive control signals. The first and second drive control signals are generated so that the first and second drive signals each have a same frequency as the pre-drive signal but are different in amplitude from one another to cause the first and second mirrors to move at a same frequency, with a same and substantially constant given opening angle as one another, and in phase with one another.
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公开(公告)号：US10365476B2
公开(公告)日：2019-07-30
申请号：US15643164
申请日：2017-07-06
Applicant: STMicroelectronics Ltd
Inventor： Guy Amor , Offir Duvdevany
Abstract: Mirror control circuitry described herein is for controlling a first micro-mirror of a micro-mirror apparatus that scans across a target area in a scan pattern. The mirror control circuitry includes a processor that determines a mechanical angle of the first micro-mirror for a given instant in time during scanning of the first micro-mirror between upper and lower rotational limits, the mechanical angle being such to maintain the scan pattern as being uniform while the micro-mirror apparatus scans across the target area between the upper and lower rotational limits. The processor also generates a driving signal for the first micro-mirror as a function of the determined mechanical angle for the first micro-mirror at the given instant in time.
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公开(公告)号：US20190011695A1
公开(公告)日：2019-01-10
申请号：US15643164
申请日：2017-07-06
Applicant: STMicroelectronics Ltd
Inventor： Guy Amor , Offir Duvdevany
IPC: G02B26/10
CPC classification number: G02B26/101 , H04N9/3135 , H04N9/3161 , H04N9/3164
Abstract: Mirror control circuitry described herein is for controlling a first micro-mirror of a micro-mirror apparatus that scans across a target area in a scan pattern. The mirror control circuitry includes a processor that determines a mechanical angle of the first micro-mirror for a given instant in time during scanning of the first micro-mirror between upper and lower rotational limits, the mechanical angle being such to maintain the scan pattern as being uniform while the micro-mirror apparatus scans across the target area between the upper and lower rotational limits. The processor also generates a driving signal for the first micro-mirror as a function of the determined mechanical angle for the first micro-mirror at the given instant in time.
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