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.

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.

公开(公告)号：US20210033402A1

公开(公告)日：2021-02-04

申请号：US16932526

申请日：2020-07-17

Applicant: STMicroelectronics S.r.l.

Inventor： Paolo Rosingana ,  Alessandra Maria Rizzo Piazza Roncoroni ,  Federico Rizzardini ,  Lorenzo Bracco ,  Stefano Paolo Rivolta ,  Marco Bianco

IPC: G01C21/18 ,  G06F1/3206 ,  G06F3/0346

Abstract: An embodiment inertial measurement system includes: at least one motion sensor to output motion data with an output data rate (ODR) period; and a control unit coupled to the motion sensor to control operation thereof based on a power mode switching, according to which each ODR period includes: a first phase, in which the motion sensor is controlled in a condition of low power consumption; and a subsequent measurement phase, in which the motion sensor is controlled to perform measurements for generation of measurement data. The control unit adaptively adjusts the duration of the ODR period based on at least one check related to the measurement data generated during the measurement phase.

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.

公开(公告)号：US11942107B2

公开(公告)日：2024-03-26

申请号：US17183288

申请日：2021-02-23

Applicant: STMICROELECTRONICS S.r.l.

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

IPC: G10L25/78 ,  G06N5/01 ,  G06N20/10 ,  G10L25/09 ,  G10L25/30 ,  G10L25/51 ,  H04R25/00 ,  G10L15/16 ,  G10L19/26

CPC classification number: G10L25/78 ,  G06N5/01 ,  G06N20/10 ,  G10L25/09 ,  G10L25/30 ,  G10L25/51 ,  H04R25/40 ,  H04R25/505 ,  H04R25/604 ,  G10L15/16 ,  G10L19/26

Abstract: The present disclosure is directed to a device and method for detecting presence or absence of human speech. The device and method utilize a low-power accelerometer. The device and method generate an acceleration signal using the accelerometer, filter the acceleration signal with a band pass filter or a high pass filter, determine at least one calculation of the filtered acceleration signal, detect a presence or absence of a voice based on the at least one calculation, and output a detection signal that indicates the presence or absence of the voice. The device and method are well suited for portable audio devices, such as true wireless stereo headphones, that have a limited power supply.

公开(公告)号：US11816290B2

公开(公告)日：2023-11-14

申请号：US18055758

申请日：2022-11-15

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Federico Rizzardini ,  Lorenzo Bracco

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

CPC classification number: G06F3/0418 ,  G06F3/017 ,  G06F3/043 ,  G06F3/04166 ,  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.

公开(公告)号：US11360585B2

公开(公告)日：2022-06-14

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 ,  G06F3/01 ,  G06F3/0346

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.

公开(公告)号：US20210034171A1

公开(公告)日：2021-02-04

申请号：US16932467

申请日：2020-07-17

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Federico Rizzardini ,  Lorenzo Bracco

IPC: G06F3/0346 ,  G06F3/038 ,  G06F3/01

Abstract: An embodiment pointing method to generate screen-frame displacement data based on 3D-space movements of a pointing electronic device, comprises receiving a gravity vector (g), having components (gx, gy, gz) corresponding to respective projections of gravity acceleration ({right arrow over (g)}) on three axes (X, Y, Z) of a 3D reference system associated with the pointing electronic device, generated by a sensor-fusion algorithm from joint processing of an acceleration signal, indicative of acceleration acting on the pointing electronic device along the three axes, and of a gyroscope signal (Gyro), indicative of angular rate of rotation of the pointing electronic device around the three axes. The method further comprises implementing a roll-compensation of the gyroscope signal (Gyro) as a function of the gravity vector (g) to determine a roll-compensated gyroscope signal (Gyro′); and generating the screen-frame displacement data based on the roll-compensated gyroscope signal (Gyro′).

公开(公告)号：US12164705B2

公开(公告)日：2024-12-10

申请号：US18059214

申请日：2022-11-28

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Federico Rizzardini ,  Lorenzo Bracco

IPC: G01B7/30 ,  G06F3/0346

Abstract: A device includes a memory and processing circuitry coupled to the memory. The processing circuitry, in operation: estimates an angular rate of change and determines a rotational versor based on the rotational data; and estimates a gravity vector based on the angular rate of change and the rotational versor. The processing circuitry generates a dynamic gravity vector based on the estimated gravity vector, a correction factor and an estimated error in estimated gravity vector. The processing circuitry estimates a linear acceleration and determines an acceleration versor based on the acceleration data, and determines the correction factor based on the linear acceleration. The processing circuitry estimates the error in the estimated gravity vector based on the acceleration versor.

公开(公告)号：US12143764B2

公开(公告)日：2024-11-12

申请号：US17686322

申请日：2022-03-03

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Federico Rizzardini ,  Lorenzo Bracco ,  Andrea Labombarda ,  Mauro Bardone ,  Stefano Paolo Rivolta ,  Federico Iaccarino

IPC: H04R1/10 ,  G06F3/044 ,  H03K17/96

Abstract: The present disclosure is directed to input detection for electronic devices using electrostatic charge sensors. The devices and methods disclosed herein utilize electrostatic charge sensors to detect various touch gestures, such as long and short touches, single/double/triple taps, and swipes; and perform in-ear detection.