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    Three-level motion detector using accelerometer device in key fob application
    2.
    发明授权
    Three-level motion detector using accelerometer device in key fob application 有权

    公开(公告)号：US11037436B2

    公开(公告)日：2021-06-15

    申请号：US16296016

    申请日：2019-03-07

    Applicant: STMicroelectronics S.r.l.

    Inventor： Stefano Paolo Rivolta ,  Federico Rizzardini ,  Daniele Arceri ,  Alessandra Maria Rizzo Piazza Roncoroni ,  Marco Bianco

    IPC: G08C17/00 ,  G07C9/00 ,  B60R25/40 ,  B60R25/24

    Abstract: A remote access device and methods of operation thereof are provided for accessing a physical object or location. The remote access device includes an accelerometer, a wireless transmitter, and control circuitry. The control circuitry causes the wireless transmitter to transition between a first operating mode and a second operating mode in response to receiving signals from the accelerometer indicating a first change in motion states of the remote access device. The control circuitry causes the wireless transmitter to transition between a first operating mode and a second operating mode in response to receiving signals from the accelerometer indicating a second change in motion states of the remote access device. The control circuitry further causes the wireless transmitter to transition between the first operating mode and the second operating mode in response to receiving signals from the accelerometer indicating a third change in motion states of the remote access device.

    GESTURE RECOGNITION SYSTEM AND METHOD FOR A DIGITAL-PEN-LIKE DEVICE AND CORRESPONDING DIGITAL-PEN-LIKE DEVICE
    4.
    发明申请
    GESTURE RECOGNITION SYSTEM AND METHOD FOR A DIGITAL-PEN-LIKE DEVICE AND CORRESPONDING DIGITAL-PEN-LIKE DEVICE 有权

    公开(公告)号：US20210034167A1

    公开(公告)日：2021-02-04

    申请号：US16922752

    申请日：2020-07-07

    Applicant: STMicroelectronics S.r.l.

    Inventor： Federico Rizzardini ,  Lorenzo Bracco ,  Stefano Paolo Rivolta

    IPC: G06F3/038

    Abstract: A gesture-recognition system for a digital-pen-like device, envisages: at least one motion sensor to provide at least one motion signal indicative of movements of the digital-pen-like device; a gesture-recognition signal processor, coupled to the at least one motion sensor to process the motion signal and to implement a plurality of gesture recognition algorithms based on the motion signal, each of the gesture recognition algorithms being configured to recognize a corresponding gesture performed by a user of the digital-pen-like device; and a controller coupled to the gesture-recognition signal processor and transmitting gesture-recognition data indicative of a recognized gesture towards a host apparatus, with which the digital-pen-like device is associated.

    Method for detecting an open or closed state of a foldable electronic device
    7.
    发明授权
    Method for detecting an open or closed state of a foldable electronic device 有权

    公开(公告)号：US11921548B2

    公开(公告)日：2024-03-05

    申请号：US18047187

    申请日：2022-10-17

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Stefano Paolo Rivolta ,  Roberto Mura ,  Lorenzo Bracco ,  Federico Rizzardini

    IPC: G06F1/16

    CPC classification number: G06F1/1677

    Abstract: The present disclosure is directed to a detection method of a first or second state of a foldable electronic device including a first and a second hardware element tiltable to each other and accommodating a first and a second electrode which are in contact with each other when the foldable electronic device is in the first state and at a distance from each other otherwise. The detection method includes: acquiring a first and a second charge variation signal indicative of environmental electric/electrostatic charge variations detected by the first and second electrodes; generating a differential signal indicative of a difference between the first and the second charge variation signals; generating, as a function of the differential signal, one or more feature signals; and generating, as a function of the one or more feature signals, a contact signal indicative of the first or second states of the foldable electronic device.

    Pointing electronic device with fast start-up recovery and corresponding method
    10.
    发明授权
    Pointing electronic device with fast start-up recovery and corresponding method 有权

    公开(公告)号：US11249562B2

    公开(公告)日：2022-02-15

    申请号：US17162446

    申请日：2021-01-29

    Applicant: STMicroelectronics S.r.l.

    Inventor： Federico Rizzardini ,  Stefano Paolo Rivolta ,  Lorenzo Bracco

    IPC: G09G5/00 ,  G06F3/0346 ,  G06F3/0487 ,  G06F3/0354

    Abstract: In an embodiment pointing electronic device, a sensor fusion processing stage generates an orientation estimation quantity indicative of an orientation about a longitudinal axis based on a sensor fusion algorithm envisaging processing of acceleration and gyroscopic signals; and a pointing determination stage implements an orientation-compensation of the gyroscopic signal as a function of the orientation estimation and generates screen-frame displacement data corresponding to 3D-space movements of the pointing electronic device based on the orientation-compensated gyroscopic signal. A processing block provides a starting value of the roll estimation, used to decrease an initial roll estimation error, by storing past values of the acceleration signal, during a time interval preceding start-up; and, upon start-up, retrieving and processing the stored past values to generate processed acceleration data, used by the sensor fusion processing stage to initialize the sensor fusion algorithm and generate the starting value of the roll estimation quantity.

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