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91.发明申请公开(公告)号：US20200029058A1
公开(公告)日：2020-01-23
申请号：US16585751
申请日：2019-09-27
Applicant: STMicroelectronics S.r.l. , STMicroelectronics Ltd
Inventor： Massimo RATTI , Eli YASER , Naomi PETRUSHEVSKY , Yotam NACHMIAS
Abstract: A light projection system includes a GPU that receives video data containing video images, defines a two-dimensional grid (each element of which represents a position of a light beam at a different time), designates which elements of the two-dimensional grid correspond to positions of the light beam in a designated area, designates which elements correspond to positions of the light beam outside of the designated area with some positions outside being designated as calibration positions, maps each element corresponding to positions in the designated area to a corresponding pixel of a frame of a video image, and maps elements corresponding to calibration positions to calibration pixels. An ASIC receives the mapped pixels and mapped calibration pixels from the GPU, and generates a beam position control signal therefrom. A controller controls a movable mirror based on the beam position control signal.
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92.发明授权公开(公告)号：US10527842B2
公开(公告)日：2020-01-07
申请号：US15945570
申请日：2018-04-04
Applicant: STMicroelectronics LTD
Inventor： Avi Resler
Abstract: A projector includes a mirror quasi-statically driven by a drive signal to scan a laser beam in a pattern. A drive circuit generates the drive signal so the mirror moves in a non-linear fashion, yielding unwanted resonances. The non-linearity results in movement of the mirror through a first projection area, into a dead zone, and into a second projection area. The laser beam is emitted as the mirror moves through the first and second projection areas, but not the dead zone. A controller samples a feedback signal of the mirror as it moves through the first and second projection areas, producing first and second projection area sample which are processed to produce first and second ripple measurements. First and second correction signals are generated as a function of the ripple measurements. The drive circuit applies the correction signals to the drive signal so that the unwanted resonances are attenuated.
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公开(公告)号：US20200003879A1
公开(公告)日：2020-01-02
申请号：US16025499
申请日：2018-07-02
Applicant: STMicroelectronics Ltd
Inventor： Guy AMOR , Tzvi PHILIPP , Elan ROTH
Abstract: A laser ranging system includes a light source emitting a beam of collimated light. A beam splitter polarizes the beam with a first type of linear polarization. A wave plate receives the beam from the beam splitter and polarizes the beam with a circular polarization. A movable mirror scans the beam across a target, receives a return beam from the target, and reflects the return beam toward the wave plate. The wave plate polarizes the return beam with a second type of linear polarization. The beam splitter receives the return beam from the wave plate. A detector detects arrival of the return beam from the beam splitter. A circuit receives determines a distance to the target as a function of a time interval between emission of the beam and arrival of the return beam.
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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：US10365474B2
公开(公告)日：2019-07-30
申请号：US15613455
申请日：2017-06-05
Applicant: STMicroelectronics Ltd
Inventor： Offir Duvdevany , Naomi Petrushevsky
Abstract: Disclosed herein is a mirror controller for an oscillating mirror. The mirror controller includes a processor configured to receive a mirror sense signal from the oscillating mirror and to determine a phase error between the mirror sense signal and a mirror drive signal. The processor determines the phase error by sampling the mirror sense signal at a first time, sampling the mirror sense signal at a second time at which the mirror sense signal is expected to be equal to the mirror sense signal as sampled at the first time, and generating the phase error as a function of a difference between the sample of the mirror sense signal at the second time and the sample of the mirror sense signal at the first time.
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Patent Agency Ranking
公开(公告)号：US20190155018A1
公开(公告)日：2019-05-23
申请号：US16257333
申请日：2019-01-25
Applicant: STMicroelectronics Ltd
Inventor： Sason SOURANI
IPC: G02B26/08 , H02P25/032 , G09G3/34
Abstract: A method for controlling operation of a MEMS mirror includes steps for: generating activation pulses for operating the MEMS mirror and generating a window activation signal for current detection, with the window activation signal overlapping with an end of an activation pulse. The method also includes detecting current through a stator or a rotor of the MEMS mirror during the window activation signal and terminating a current activation pulse and the window activation signal in response to detecting a change in the direction of the current through the stator or the rotor of the MEMS mirror during the window activation signal.
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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.
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公开(公告)号：US10228555B2
公开(公告)日：2019-03-12
申请号：US15256909
申请日：2016-09-06
Applicant: STMicroelectronics Ltd
Inventor： Sason Sourani
IPC: B81B7/00 , G02B26/08 , G09G3/34 , H02P25/032
Abstract: The present disclosure provides a system and method for controlling operation of a resonance MEMS mirror. The system and method includes activating either an in-plane or staggered MEMS mirror via sets of activation pulses applied to the MEMS mirror, detecting current at the MEMS mirror, generating a window for detecting a change in a direction of the current at the MEMS mirror, and terminating the window and the activation pulse if a change in the current direction is detected during the window. In some embodiments, two sets of activation pulses are applied to the MEMS mirror.
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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：US20180288366A1
公开(公告)日：2018-10-04
申请号：US15471333
申请日：2017-03-28
Applicant: STMicroelectronics Ltd
Inventor： Gilad Adler , Sason Sourani
CPC classification number: H04N7/0127 , G02B26/0833 , G02B26/101 , G02B26/105 , G09G3/02 , G09G2310/0224 , H04N9/3129 , H04N9/3161 , H04N9/3164 , H04N9/3188
Abstract: Disclosed herein is an electronic device including a first laser source configured to project a first laser beam, and a second laser source configured to project a second laser beam in alignment with the first laser beam in a first direction but at an angle with respect to the first laser beam in a second direction. A mirror apparatus is positioned so as to reflect the first and second laser beams. Control circuitry is configured to control the mirror apparatus to simultaneously reflect the first and second laser beams in a first scan pattern to form an first image, the first image formed from the first scan pattern having a number of scan lines greater than two times a horizontal resonance frequency at which the mirror apparatus oscillates divided by a desired frame rate of the first image.
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