-
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.
-
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.
-
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.
-
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：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.
-
Patent Agency Ranking
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.
-
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.
-
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.
-
139.发明授权公开(公告)号：US09958919B2
公开(公告)日：2018-05-01
申请号：US13458029
申请日：2012-04-27
Applicant: Danny Sheng , Andy Lin , Johnny Yoon
Inventor： Danny Sheng , Andy Lin , Johnny Yoon
CPC classification number: G06F1/266 , G09G3/2092 , G09G2330/028 , G09G2330/04
Abstract: An embodiment is a circuit for use with a display device, the circuit including: a first input node configured to be operatively coupled to a first port of a data source device that provides the display device with data, to receive a first direct voltage used for a real-time display of the data on the display device; and at least one output node, configured to operatively provide the display device with at least one output voltage generated based on the first direct voltage, wherein the first port is isolated from a data port used to transmit the data.
-
公开(公告)号：US20180024351A1
公开(公告)日：2018-01-25
申请号：US15723529
申请日：2017-10-03
Applicant: STMicroelectronics Ltd
Inventor： Offir Duvdevany
CPC classification number: G02B26/0833 , G01D5/24 , G01D5/243 , G02B26/105
Abstract: A device disclosed herein includes a feedback measuring circuit to measure a signal flowing through a movable MEMS mirror. Processing circuitry determines a time at which the signal indicates that a capacitance of the movable MEMS mirror is substantially at a maximum capacitance. The processing circuitry also determines, over a window of time extending from the time at which the signal indicates that the capacitance of the movable MEMS mirror is substantially at the maximum to a given time, a total change in capacitance of the movable MEMS mirror compared to the maximum capacitance. The processor further determines the capacitance at the given time as a function of the total change in capacitance, and determines an opening angle of the movable MEMS mirror as a function of the capacitance at the given time.
-
-
-
-
-
-
-
-
-
Search Results
280
records
(took 0.139 seconds)
