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    LOW-POWER POINTING METHOD AND ELECTRONIC DEVICE IMPLEMENTING THE POINTING METHOD
    1.
    发明公开
    LOW-POWER POINTING METHOD AND ELECTRONIC DEVICE IMPLEMENTING THE POINTING METHOD 审中-公开

    公开(公告)号：EP3771964A1

    公开(公告)日：2021-02-03

    申请号：EP20188656.1

    申请日：2020-07-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIVOLTA, Stefano Paolo ,  RIZZARDINI, Federico ,  BRACCO, Lorenzo

    IPC: G06F1/3234 ,  G06F3/03 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0346

    Abstract: A pointing method to generate screen-frame displacement data based on 3D-space movements of a pointing electronic device (1), envisages: receiving attitude quaternion data (q), indicative of an orientation of the electronic device (1) in the 3D-space, generated by a sensor-fusion algorithm from joint processing of an acceleration signal (Acc), indicative of acceleration acting on the pointing electronic device (1) along three reference axes (X, Y, Z) of the 3D-space, and of a gyroscope signal (Gyro), indicative of angular rate of rotation of the pointing electronic device (1) around the three reference axes (X, Y, Z) of the 3D-space; processing the quaternion data (q) to determine an orientation difference between a current orientation and a previous orientation of the electronic device (1) in the 3D-space; translating the orientation difference from the quaternion space to tilt-compensated angular rate of rotation (g x , g y , g z ) of the electronic device (1) in the 3D-space; and generating the screen-frame displacements based on the tilt-compensated angular rate of rotation in the 3D-space.

    METHOD FOR DETECTING AN OPEN OR CLOSED STATE OF A FOLDABLE ELECTRONIC DEVICE
    3.
    发明公开
    METHOD FOR DETECTING AN OPEN OR CLOSED STATE OF A FOLDABLE ELECTRONIC DEVICE 审中-公开

    公开(公告)号：EP4170461A9

    公开(公告)日：2023-06-14

    申请号：EP22201942.4

    申请日：2022-10-17

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIVOLTA, Stefano Paolo ,  MURA, Roberto ,  BRACCO, Lorenzo ,  RIZZARDINI, Federico

    IPC: G06F1/16

    Abstract: Detection method (50) of a first or second state of a foldable electronic device (10) comprising a first and a second hardware element (12; 14) tiltable to each other and accommodating a first and a second electrode (20b; 22b) 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 (50) is performed by a control unit (23) of the foldable electronic device and comprises the steps of: acquiring (S10) a first and a second charge variation signal indicative of environmental electric/electrostatic charge variations detected by the first and second electrodes; generating (S12) a differential signal (S D ) indicative of a difference between the first (S Q1 ) and the second (S Q2 ) charge variation signals; generating (S14, S16, S18, S20), as a function of the differential signal (S D ), one or more feature signals (S T ); and generating (S22), as a function of the one or more feature signals (S T ), a contact signal (Sc) indicative of the first or second states of the foldable electronic device (10) .

    GESTURE RECOGNITION SYSTEM AND METHOD FOR A DIGITAL-PEN-LIKE DEVICE AND CORRESPONDING DIGITAL-PEN-LIKE DEVICE
    6.
    发明公开
    GESTURE RECOGNITION SYSTEM AND METHOD FOR A DIGITAL-PEN-LIKE DEVICE AND CORRESPONDING DIGITAL-PEN-LIKE DEVICE 审中-公开

    公开(公告)号：EP3771969A1

    公开(公告)日：2021-02-03

    申请号：EP20188666.0

    申请日：2020-07-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIZZARDINI, Federico ,  BRACCO, Lorenzo ,  RIVOLTA, Stefano Paolo

    IPC: G06F3/0346 ,  G06F3/01 ,  G06F1/3231

    Abstract: A gesture-recognition system for a digital-pen-like device (1), envisages: at least one motion sensor (2) to provide at least one motion signal (Sm) indicative of movements of the digital-pen-like device (1); a gesture-recognition module (6), coupled to the at least one motion sensor (2) to process the motion signal (Sm) and to implement a plurality of gesture recognition algorithms based on the motion signal (Sm), each of the gesture recognition algorithms being configured to recognize a corresponding gesture performed by a user of the digital-pen-like device (1); and a control unit (8) coupled to the gesture-recognition module (6) and transmitting gesture-recognition data indicative of a recognized gesture towards a host apparatus (10), with which the digital-pen-like device (1) is associated.

    SYSTEM FOR DETECTING A TOUCH GESTURE OF A USER, DEVICE COMPRISING THE SYSTEM, AND METHOD
    7.
    发明公开
    SYSTEM FOR DETECTING A TOUCH GESTURE OF A USER, DEVICE COMPRISING THE SYSTEM, AND METHOD 审中-公开

    公开(公告)号：EP4071588A1

    公开(公告)日：2022-10-12

    申请号：EP22167231.4

    申请日：2022-04-07

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIZZARDINI, Federico ,  BRACCO, Lorenzo

    IPC: G06F3/038 ,  H01H1/00 ,  H03K17/96 ,  G06F1/16

    Abstract: System (1) for detecting a touch gesture of a user on a detection surface (102), comprising: a processing unit (2); and an accelerometer (4) to detect a vibration at the detection surface and generate a vibration signal (S acc_raw ). The processing unit is configured to: acquire the vibration signal, detect, in the vibration signal, a signal characteristic (p1, p2) 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 (6) may also be used as a further parameter to validate the touch gesture.

    VOICE ACTIVITY DETECTION WITH LOW-POWER ACCELEROMETER
    8.
    发明公开
    VOICE ACTIVITY DETECTION WITH LOW-POWER ACCELEROMETER 审中-公开

    公开(公告)号：EP4050603A1

    公开(公告)日：2022-08-31

    申请号：EP22155997.4

    申请日：2022-02-09

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIVOLTA, Stefano Paolo ,  RIZZARDINI, Federico ,  BRACCO, Lorenzo ,  MURA, Roberto

    IPC: G10L25/78

    Abstract: The device (10) and the method are directed to detect presence or absence of human speech. The device and method utilize a low-power accelerometer (14). 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.

    ELECTRONIC APPARATUS CONTROL METHOD PERFORMED THROUGH LID ANGLE CALCULATION, ELECTRONIC APPARATUS THEREOF AND SOFTWARE PRODUCT
    9.
    发明公开
    ELECTRONIC APPARATUS CONTROL METHOD PERFORMED THROUGH LID ANGLE CALCULATION, ELECTRONIC APPARATUS THEREOF AND SOFTWARE PRODUCT 审中-公开

    公开(公告)号：EP3907465A1

    公开(公告)日：2021-11-10

    申请号：EP21171687.3

    申请日：2021-04-30

    Applicant: STMicroelectronics S.r.l.

    Inventor： RIZZARDINI, Federico ,  RIVOLTA, Stefano Paolo ,  BRACCO, Lorenzo ,  BIANCO, Marco

    IPC: G01B7/30 ,  G01D5/14

    Abstract: A method for controlling an electronic apparatus (10) on the basis of a value of a lid angle (α LID ) between a first hardware element (12) accommodating a first magnetometer (20) and a second hardware element (14) accommodating a second magnetometer (22), comprising: acquiring, through the magnetometers, first signals (B 1 , B 2 ) representing an orientation of the hardware elements; generating, on the basis of the first signals, a calibration parameter (J 1 ) indicative of a condition of calibration of the magnetometers; generating, on the basis of the first signals, a reliability value (K 1 ) indicative of a condition of reliability of the first signals; calculating (50) a first intermediate value (α LID_MAG ) of the lid angle (α LID ) on the basis of the first signals; calculating (53) a current value of the lid angle (α LID ) on the basis of the calibration parameter (J 1 ), of the reliability value (K 1 ) , and of the first intermediate value (α LID_MAG ) ; and controlling the electronic apparatus on the basis of the current value.

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