公开(公告)号：US11588519B2

公开(公告)日：2023-02-21

申请号：US17475211

申请日：2021-09-14

Applicant: STMICROELECTRONICS LTD ,  STMICROELECTRONICS (ROUSSET) SAS

Inventor： Chia Hao Chen ,  Nicolas Cordier

IPC: H04B5/00 ,  H02J50/10 ,  H02J50/80 ,  H02J50/90

Abstract: The present disclosure relates to a method for aligning a smartphone providing NFC wireless power for charging a battery of a device, the method comprising: emitting, with a first NFC antenna of the smartphone, an NFC field for wirelessly charging the battery of the device comprising a second NFC antenna; obtaining, with the smartphone, a measured value of a signal representative of the NFC field strength between the smartphone and the device; determining, by the smartphone, a range of values of a plurality of ranges of values the measured value belongs; and emitting, by the smartphone, at least one notification signal to a user with a frequency determined by the determined range of values.

公开(公告)号：US11515805B2

公开(公告)日：2022-11-29

申请号：US17148246

申请日：2021-01-13

Applicant: STMicroelectronics LTD

Inventor： Laurent Gonthier

IPC: H02M7/155 ,  H02J7/00 ,  H02M1/42 ,  H02J7/34

Abstract: A capacitive element has its terminals coupled together by two thyristors electrically in antiparallel. The discharge of the capacitive element is controlled by the application of a gate current to one thyristor of the two thyristors which is in a reverse-biased state in response to a voltage stored across the terminals of the capacitive element. The reverse-biased thyristor responds to the applied gate current by passing a leakage current to discharge the stored voltage.

公开(公告)号：US20220308229A1

公开(公告)日：2022-09-29

申请号：US17655118

申请日：2022-03-16

Applicant: STMICROELECTRONICS (BEIJING) R&D CO., LTD ,  STMicroelectronics (Grenoble 2) SAS ,  STMICROELECTRONICS LTD.

Inventor： Etienne Bossart ,  Ji Nan Li ,  Cedric Patrick Jean Claude Colombo ,  Thomas Perotto

IPC: G01S17/894 ,  G01S17/10 ,  G01S7/4863 ,  G01S7/48 ,  H01L31/107

Abstract: The present disclosure concerns a method of measuring the distance between a device and an object comprising the steps of determination of a first estimated distance based on the time of flight of first light pulses having a first period; determination of a second estimated distance based on the time of flight of second light pulses having a second period different from the first period; determination based on the interval between the first and second estimated distances of whether the device is in a wraparound area among wraparound areas; and if the device is in a wraparound area among wraparound areas, adding to the first estimated distance a compensation having its value depending on the wraparound area.

公开(公告)号：US20220140571A1

公开(公告)日：2022-05-05

申请号：US17083548

申请日：2020-10-29

Applicant: STMicroelectronics Ltd

Inventor： Alex DOMNITS

IPC: H01S5/40 ,  H01S5/022 ,  H01S5/00 ,  G02B27/01

Abstract: A compact optical package includes an RGB laser unit containing red, green, and blue laser diodes within a single package, with three lenses adjacent the RGB laser unit to collimate red, green, and blue laser light emitted by the red, green, and blue laser diodes. A beam combiner combines the red, green, and blue laser light into a single RGB laser beam and also outputs a lower power feedback beam. The compact optical package also includes a movable mirror apparatus, and a fixed folding mirror upon which the single RGB laser beam output by the beam splitter impinges and reflects the single RGB laser beam toward the movable mirror apparatus. The movable mirror apparatus directs the single RGB laser beam through an exit window and to scan the single RGB laser beam in a scan pattern to form at least one desired image on a target.

公开(公告)号：US20220103062A1

公开(公告)日：2022-03-31

申请号：US17548754

申请日：2021-12-13

Applicant: STMicroelectronics (Tours) SAS ,  STMicroelectronics LTD

Inventor： Ghafour BENABDELAZIZ ,  Laurent GONTHIER

IPC: H02M1/42 ,  H02M7/155 ,  H02M7/217

Abstract: An AC capacitor is coupled to a totem-pole type PFC circuit. In response to detection of a power input disconnection, the PFC circuit is controlled to discharge the AC capacitor. The PFC circuit includes a resistor and a first MOSFET and a second MOSFET coupled in series between DC output nodes with a common node coupled to the AC capacitor. When the disconnection event is detected, one of the first and second MOSFETs is turned on to discharge the AC capacitor with a current flowing through the resistor and the turned on MOSFET. Furthermore, a thyristor may be simultaneously turned on, with the discharge current flowing through a series coupling of the MOSFET, resistor and thyristor. Disconnection is detected by detecting a zero-crossing failure of an AC power input voltage or lack of input voltage decrease or input current increase in response to MOSFET turn on for a DC input.

公开(公告)号：US11271493B2

公开(公告)日：2022-03-08

申请号：US16897672

申请日：2020-06-10

Applicant: STMicroelectronics LTD

Inventor： Laurent Gonthier ,  Yu Tsao Lin

IPC: H02M7/162 ,  H02M1/32 ,  H02M1/36 ,  H02M1/42 ,  H02M1/08 ,  H02M1/00

Abstract: A rectifying bridge has a thyristor coupled in series with a rectifying element between a first rectified output terminal of a rectifying bridge circuit and a second rectified output terminal of the rectifying bridge circuit. A diode is coupled in series with a DC voltage source between a gate of the thyristor and the second rectified output terminal.

公开(公告)号：US11251696B2

公开(公告)日：2022-02-15

申请号：US16885781

申请日：2020-05-28

Applicant: STMicroelectronics LTD

Inventor： Laurent Gonthier

IPC: H02M1/32 ,  H02M7/155 ,  H02M1/08 ,  H02M1/00

Abstract: A circuit includes two thyristors coupled in anti-series. An AC capacitor has first and second electrodes respectively coupled to two different electrodes of the two thyristors. The first and second electrodes are coupled to receive an AC voltage. A control circuit detects discontinuance of application of the AC voltage to the AC capacitor and in response thereto simultaneously applies same gate currents to the two thyristors. A current path through the two thyristors (one passing current in forward mode and the other in reverse mode) discharges a residual voltage stored on the AC capacitor.

公开(公告)号：US11054635B1

公开(公告)日：2021-07-06

申请号：US16789725

申请日：2020-02-13

Applicant: STMicroelectronics LTD

Inventor： Eli Yaser ,  Dadi Sharon

IPC: H04N9/31 ,  G02B26/10 ,  G02B26/08 ,  G03B21/28

Abstract: A system includes a mirror controller driving fast and slow axis mirrors of a projector with fast and slow axis drive signals to reflect a collimated light beam in a scan pattern across the target. The scan pattern includes trace lines which cause display of an input video stream on the target, and retrace lines which operate to return the slow axis mirror to a proper location to begin a next frame of the scan pattern. The slow axis drive signal is generated to maintain a number of trace lines in each frame of the scan pattern constant across frames, but the slow axis drive signal is modified to lock a phase and frequency of the displayed video to a phase and frequency of the input video stream by changing a number of retrace lines in each frame of the scan pattern on a frame-by-frame basis by a non-integer number.

公开(公告)号：US20200249465A1

公开(公告)日：2020-08-06

申请号：US16855301

申请日：2020-04-22

Applicant: STMicroelectronics Ltd

Inventor： Sivan KINSTLICH ,  Offir DUVDEVANY

IPC: G02B26/08

Abstract: Mirror control circuitry operates to control a movable mirror. The mirror control circuitry includes drive circuitry for providing a drive signal to the movable mirror, and a processor. The processor causes 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：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.