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公开(公告)号：US20180164579A1
公开(公告)日：2018-06-14
申请号：US15838843
申请日：2017-12-12
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran , Offir Duvdevany , Naomi Petrushevsky
IPC: G02B26/08 , G02B26/10 , H02P25/032 , G01R19/04
CPC classification number: G02B26/085 , G01R19/04 , G02B26/0833 , G02B26/105 , H02P25/032
Abstract: Disclosed herein is an electronic device that includes a peak detection circuit configured to receive a mirror sense signal from an oscillating mirror and to generate peak information for a mirror period as a function thereof. The electronic device includes a mirror control circuit that estimates an opening angle of the oscillating mirror as a function of the peak information, generates a control signal for the oscillating mirror as a function of the estimated opening angle, and resets the peak detection circuit at an end of the mirror period.
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公开(公告)号：US11528456B2
公开(公告)日：2022-12-13
申请号：US16806572
申请日：2020-03-02
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran
Abstract: A control system for a laser scanning projector includes a mirror controller generating horizontal and vertical mirror synchronization signals for an oscillating mirror apparatus based upon a mirror clock signal, and laser modulation circuitry. The laser modulation circuitry generates horizontal and vertical laser synchronization signals as a function of a received laser clock signal, and generates control signals for a laser that emits a laser beam that impinges on the oscillating mirror apparatus. Synchronization circuitry generates the laser clock signal and sends the laser clock signal to the laser modulation circuitry, receives the horizontal and vertical mirror synchronization signals from the mirror controller, receives the horizontal and vertical laser synchronization signals from the laser modulation circuitry, and modifies the laser clock signal so as to achieve alignment between the horizontal and vertical mirror synchronization signals and the horizontal and vertical laser synchronization signals.
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公开(公告)号：US20180356627A1
公开(公告)日：2018-12-13
申请号：US15617032
申请日：2017-06-08
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran
CPC classification number: G02B26/0833 , G02B26/105
Abstract: Disclosed herein is a control circuit for a movable mirror. The control circuit includes driving circuitry configured to drive the movable mirror with a drive signal to effectuate oscillating of the movable mirror, opening angle determination circuitry configured to determine an opening angle of the movable mirror, and amplitude control circuitry. The amplitude control circuitry is configured to a) first cause the driving circuitry to generate the drive signal as having an upper threshold drive amplitude, and b) then later cause the driving circuitry to generate the drive signal as having a nominal drive amplitude, as a function of the opening angle of the movable mirror being equal to a desired opening angle.
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公开(公告)号：US11226480B2
公开(公告)日：2022-01-18
申请号：US16897491
申请日：2020-06-10
Applicant: STMicroelectronics LTD
Inventor： Elik Haran , Offir Duvdevany , Naomi Petrushevsky
IPC: G02B26/08 , G01R19/04 , H02P25/032 , G02B26/10
Abstract: An electronic device includes an analog to digital converter receiving an analog mirror sense signal from an oscillating mirror and generating a digital mirror sense signal therefrom, and a digital signal processing block. The digital signal processing block cooperates with the analog to digital converter to take a first sample of the digital mirror sense signal at a first time where a derivative of capacitance of the digital mirror sense signal crosses zero, take a second sample of the digital mirror sense signal at a second time between a peak of the digital mirror sense signal and the first time, and take a third sample of the digital mirror sense signal at a third time after the digital mirror sense signal has reached a minimum. Control circuitry determines an opening angle of the oscillating mirror as a function of the first, second, and third samples.
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公开(公告)号：US20180321483A1
公开(公告)日：2018-11-08
申请号：US15589542
申请日：2017-05-08
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran
CPC classification number: G02B26/085 , B81B7/008 , G02B26/101 , G02B26/105
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.
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Patent Agency Ranking
公开(公告)号：US10718940B2
公开(公告)日：2020-07-21
申请号：US15838843
申请日：2017-12-12
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran , Offir Duvdevany , Naomi Petrushevsky
IPC: G02B26/08 , G01R19/04 , H02P25/032 , G02B26/10
Abstract: Disclosed herein is an electronic device that includes a peak detection circuit configured to receive a mirror sense signal from an oscillating mirror and to generate peak information for a mirror period as a function thereof. The electronic device includes a mirror control circuit that estimates an opening angle of the oscillating mirror as a function of the peak information, generates a control signal for the oscillating mirror as a function of the estimated opening angle, and resets the peak detection circuit at an end of the mirror period.
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公开(公告)号：US20190068933A1
公开(公告)日：2019-02-28
申请号：US15689871
申请日：2017-08-29
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran
Abstract: Disclosed herein is a control system for a laser scanning projector. The control system includes a mirror controller generating a mirror synchronization signal for an oscillating mirror apparatus based upon a mirror clock signal. The control system also includes laser modulation circuitry for generating a laser synchronization signal as a function of a laser clock signal, and generating control signals for a laser that emits a laser beam that impinges on the oscillating mirror apparatus. Synchronization circuitry is for generating the laser clock signal and sending the laser clock signal to the laser modulation circuitry, receiving the mirror synchronization signal from the mirror controller, receiving the laser synchronization signal from the laser modulation circuitry, and modifying frequency and phase of the laser clock signal for the laser as a function of the mirror synchronization signal and the laser synchronization signal.
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公开(公告)号：US10048488B2
公开(公告)日：2018-08-14
申请号：US15348087
申请日：2016-11-10
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran , Gilad Adler
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.
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公开(公告)号：US11758098B2
公开(公告)日：2023-09-12
申请号：US17987250
申请日：2022-11-15
Applicant: STMicroelectronics LTD
Inventor： Elik Haran
CPC classification number: H04N9/3135 , H04N5/06 , H04N9/3155 , H04N9/3161 , H03K21/40 , H03L7/08
Abstract: A control system includes a mirror controller generating horizontal and vertical mirror synchronization signals for a mirror based upon a mirror clock signal. Laser modulation circuitry generates horizontal and vertical laser synchronization signals as a function of first and second laser clock signals and generates control signals for a laser that emits a laser beam that impinges on the mirror. First synchronization circuitry receives the horizontal mirror synchronization signal and the horizontal laser synchronization signal, and modifies generation of the first laser clock signal to achieve alignment between the horizontal mirror synchronization signal and horizontal laser synchronization signal. Second synchronization circuitry receives the vertical mirror synchronization signal and the vertical laser synchronization signal, and modifies generation of the second laser clock signal to achieve alignment between the vertical mirror synchronization signal and vertical laser synchronization signal.
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公开(公告)号：US10401616B2
公开(公告)日：2019-09-03
申请号：US15617032
申请日：2017-06-08
Applicant: STMicroelectronics Ltd
Inventor： Elik Haran
Abstract: Disclosed herein is a control circuit for a movable mirror. The control circuit includes driving circuitry configured to drive the movable mirror with a drive signal to effectuate oscillating of the movable mirror, opening angle determination circuitry configured to determine an opening angle of the movable mirror, and amplitude control circuitry. The amplitude control circuitry is configured to a) first cause the driving circuitry to generate the drive signal as having an upper threshold drive amplitude, and b) then later cause the driving circuitry to generate the drive signal as having a nominal drive amplitude, as a function of the opening angle of the movable mirror being equal to a desired opening angle.
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