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    System for detecting a touch gesture of a user, device comprising the system, and method
    2.
    发明授权
    System for detecting a touch gesture of a user, device comprising the system, and method 有权

    公开(公告)号：US11550427B2

    公开(公告)日：2023-01-10

    申请号：US17711853

    申请日：2022-04-01

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Federico Rizzardini ,  Lorenzo Bracco

    IPC: G06F3/041 ,  G06F3/043 ,  G06F3/01 ,  G06F3/044

    Abstract: System for detecting a touch gesture of a user on a detection surface, comprising: a processing unit; and an accelerometer to detect a vibration at the detection surface and generate a vibration signal. The processing unit is configured to: acquire the vibration signal, detect, in the vibration signal, a signal characteristic which can be correlated to the touch gesture of the user, detect, in the vibration signal, a stationarity condition preceding and/or following the detected signal characteristic, and validate the touch gesture in the event that both the signal characteristic and the stationarity condition have been detected. An electrostatic charge sensor may also be used as a further parameter to validate the touch gesture.

    Three-level motion detector using accelerometer device in key fob application
    3.
    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.

    DEVICE AND METHOD FOR DETERMINATION OF ANGULAR POSITION IN THREE-DIMENSIONAL SPACE, AND CORRESPONDING ELECTRONIC APPARATUS
    6.
    发明申请
    DEVICE AND METHOD FOR DETERMINATION OF ANGULAR POSITION IN THREE-DIMENSIONAL SPACE, AND CORRESPONDING ELECTRONIC APPARATUS 审中-公开
    用于确定三维空间中的角位置的装置和方法以及相应的电子装置

    公开(公告)号：US20170003751A1

    公开(公告)日：2017-01-05

    申请号：US14974630

    申请日：2015-12-18

    Applicant: STMICROELECTRONICS S.R.L.

    Inventor： Antonio Micali ,  Alberto Zancanato ,  Federico Rizzardini

    IPC: G06F3/01 ,  G01V3/08 ,  G01P15/00 ,  G01B7/30 ,  G01C19/00

    CPC classification number: G06F3/017 ,  G01B7/30 ,  G01C17/38 ,  G01C19/00 ,  G01C21/10 ,  G01C21/165 ,  G01P15/00 ,  G01V3/081

    Abstract: An electronic device determines an estimate ({circumflex over (q)}) of angular position as a function of an accelerometric signal (acc) supplied by an accelerometric sensor and as a function of at least one between a gyroscopic signal (gyro) supplied by a gyroscopic sensor and a magnetic signal (mag) supplied by a magnetic-field sensor. A processing module implements a complementary filter, which is provided with a first processing block, a second processing block, and a combination block. The first processing block receives the acceleration signal (acc) and an input signal (mag′) indicative of the magnetic signal (mag) and generates a geomagnetic quaternion (qAccMag). The second processing block receives a signal indicative of the gyroscopic signal (gyro) and generates a gyroscopic quaternion (qGyro). The combination block determines the estimate ({circumflex over (q)}) of angular position by complementarily combining the geomagnetic quaternion (qAccMag) and the gyroscopic quaternion (qGyro) based on a combination factor (K) that has a dynamic value and an adaptive value and that varies as a function of the operating conditions.

    Abstract translation: 电子设备确定作为由加速度传感器提供的加速度信号（acc）的函数的角位置的估计（{回旋（q）}），并且作为由陀螺仪信号（gyro）提供的陀螺仪信号 陀螺传感器和由磁场传感器提供的磁信号（mag）。 处理模块实现了具有第一处理块，第二处理块和组合块的互补滤波器。 第一处理块接收加速度信号（acc）和指示磁信号（mag）的输入信号（mag'），并产生地磁四元数（qAccMag）。 第二处理块接收指示陀螺仪信号（gyro）的信号，并产生陀螺四分数（qGyro）。 基于具有动态值和自适应的组合因子（K），组合块通过将​​地磁四元数（qAccMag）和陀螺四分数（qGyro）互补地组合来确定角位置的估计（{circumflex over（q）}） 值，并且根据操作条件而变化。

    Method for detecting a wrist-tilt gesture and an electronic unit and a wearable electronic device which implement the same
    7.
    发明授权
    Method for detecting a wrist-tilt gesture and an electronic unit and a wearable electronic device which implement the same 有权

    公开(公告)号：US12204694B2

    公开(公告)日：2025-01-21

    申请号：US17862937

    申请日：2022-07-12

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Federico Rizzardini ,  Lorenzo Bracco ,  Stefano Paolo Rivolta

    IPC: G06F3/01 ,  G01P15/14 ,  G06F1/16

    Abstract: An electronic device has an input which, in operation, receives an input stream of accelerometer data samples indicative of acceleration values along at least one axis. The devices includes circuitry, coupled to the input. The circuitry, in operation, executes an automatic-learning algorithm on blocks of samples of the input stream of accelerometer data samples to identify, for each block, a corresponding condition-of-user-movement from among a plurality of determined conditions-of-user-movement. The circuitry generates a plurality of streams of samples based on the input stream of accelerometer data samples, and for each condition of movement identified, selects a corresponding stream of samples of the plurality of streams of samples. The circuitry executes a wrist-tilt gesture detection algorithm using samples of the selected stream of the plurality of streams of samples.

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