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11.发明授权公开(公告)号：US10719114B2
公开(公告)日：2020-07-21
申请号：US15966808
申请日：2018-04-30
Inventor： Andy Lin , Johnny Yoon , Danny Sheng
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.
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公开(公告)号：US10684465B2
公开(公告)日：2020-06-16
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：US10483869B1
公开(公告)日：2019-11-19
申请号：US16035069
申请日：2018-07-13
Applicant: STMICROELECTRONICS LTD
Inventor： Laurent Gonthier , Kimi Lu , Jack Wang
Abstract: Embodiments are directed to power conversion circuits including a bypass circuit for bypassing an inrush current limiting resistor. In one embodiment, a power conversion circuit is provided that includes a bridge rectifier, a current limiting resistor, a controllable current switching device, and a driver. The current limiting resistor has a first terminal coupled to an output terminal of the bridge rectifier and a second terminal coupled to an electrical ground. The controllable current switching device has conduction terminals coupled in parallel with respect to the current limiting resistor. The driver is coupled between the first terminal of the current limiting resistor and a control terminal of the current switching device, and the driver controls an operation of the current switching device based on a current through the current limiting resistor.
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14.发明申请公开(公告)号：US20190310467A1
公开(公告)日：2019-10-10
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：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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Patent Agency Ranking
公开(公告)号：US10345577B2
公开(公告)日：2019-07-09
申请号：US15645259
申请日：2017-07-10
Applicant: STMicroelectronics Ltd
Inventor： Mark Kolodkin
IPC: G02B26/08
Abstract: A device described herein includes a movable MEMS mirror, with a driver configured to drive the movable MEMS mirror with a periodic signal such that the MEMS mirror oscillates at its resonance frequency. A feedback measuring circuit is configured to measure a signal flowing through the movable MEMS mirror. A processor is configured to sample the signal at first and second instants, generate an error signal as a function of a difference between the signal at the first instant in time and the signal at the second instant in time, and determine the opening angle of the movable MEMS mirror as a function of the error signal.
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17.发明申请公开(公告)号：US20190199986A1
公开(公告)日：2019-06-27
申请号：US16032634
申请日：2018-07-11
Applicant: STMicroelectronics S.r.l. , STMicroelectronics Ltd
Inventor： Massimo RATTI , Naomi PETRUSHEVSKY , Eli YASER , Yotam NACHIMIAS
CPC classification number: H04N9/3182 , G06T1/20 , H04N9/3135
Abstract: A light projection system includes a light module emitting a light beam and a movable mirror reflecting the light beam toward a surface. A graphics processing unit processes video data to compensate for a response of the light module. The response is an optical power of the light beam produced by the light module for a given forward current through the light module. A light source driver controls the light module as a function of the processed video data. Colors of the images from the video data produced on the surface by the light beam would otherwise not look as they are intended to look due to changing of the response of the light module, but the processing of the video data alters the video data such that the colors of the images from the video data produced on the surface look as they are intended to look.
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公开(公告)号：US10324283B2
公开(公告)日：2019-06-18
申请号：US15723529
申请日：2017-10-03
Applicant: STMicroelectronics Ltd
Inventor： Offir Duvdevany
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.
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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
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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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
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.
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