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    Computing system implementing an algorithm for fusing data from inertial sensors, and method
    12.
    发明授权
    Computing system implementing an algorithm for fusing data from inertial sensors, and method 有权

    公开(公告)号：US11473894B2

    公开(公告)日：2022-10-18

    申请号：US17207180

    申请日：2021-03-19

    Applicant: STMicroelectronics S.r.l.

    Inventor： Alberto Zancanato ,  Michele Ferraina ,  Federico Rizzardini ,  Stefano Paolo Rivolta

    IPC: G01B7/30 ,  G01P15/14 ,  G01P15/18 ,  G06F1/16

    Abstract: A computing system includes a first hardware element having a first accelerometer and a first gyroscope, and a second hardware element having a second accelerometer and a second gyroscope. The first and second hardware elements are moveable with respect to each other. The computing system recursively generates a result signal indicative of a relative orientation of the first and second hardware elements with respect to each other. The result signal may be generated by generating a first intermediate signal indicative of a angle between the first and second hardware elements based on signals generated by the first and second accelerometers and generating a second intermediate signal indicative of the angle based on signals generated by the first and second gyroscopes. The result signal indicative of the angle may be generated as a weighted sum of the first intermediate signal and the second intermediate signal. At least one of the first and second hardware elements is controlled by on the result signal.

    Gesture recognition system and method for a digital-pen-like device and corresponding digital-pen-like device
    13.
    发明授权
    Gesture recognition system and method for a digital-pen-like device and corresponding digital-pen-like device 有权

    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.

    Machine learning zero-rate level calibration
    14.
    发明授权
    Machine learning zero-rate level calibration 有权

    公开(公告)号：US11150090B2

    公开(公告)日：2021-10-19

    申请号：US16059701

    申请日：2018-08-09

    Applicant: STMicroelectronics S.r.l.

    Inventor： Federico Rizzardini

    IPC: G01C19/02 ,  G01C19/5776 ,  G06F17/16 ,  G01K15/00 ,  G06F17/18

    Abstract: One or more embodiments are directed to zero-rate level compensation systems. One such system includes stationary detection circuitry that receives gyroscope signals output by a gyroscope and determines whether the gyroscope is stationary based on the gyroscope signals. The stationary detection circuitry generates a stationary gyroscope signal indicating the gyroscope is stationary based on a determination that the gyroscope is stationary. A temperature sensor senses temperature and outputs temperature signals. Zero-rate level estimation circuitry receives the stationary gyroscope signal and a temperature signal associated with the stationary gyroscope signal, and iteratively estimates one or more zero-rate level compensation parameters based on the stationary gyroscope signal and the temperature signal.

    Computing system implementing an algorithm for fusing data from inertial sensors, and method
    15.
    发明授权
    Computing system implementing an algorithm for fusing data from inertial sensors, and method 有权

    公开(公告)号：US10976150B2

    公开(公告)日：2021-04-13

    申请号：US15987637

    申请日：2018-05-23

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Alberto Zancanato ,  Michele Ferraina ,  Federico Rizzardini ,  Stefano Paolo Rivolta

    IPC: G01B7/30 ,  G01P15/14 ,  G01P15/18 ,  G06F1/16

    Abstract: A computing system includes a first hardware element having a first accelerometer and a first gyroscope, and a second hardware element having a second accelerometer and a second gyroscope. The first and second hardware elements are moveable with respect to each other. The computing system recursively generates a result signal indicative of a relative orientation of the first and second hardware elements with respect to each other. The result signal may be generated by generating a first intermediate signal indicative of a angle between the first and second hardware elements based on signals generated by the first and second accelerometers and generating a second intermediate signal indicative of the angle based on signals generated by the first and second gyroscopes. The result signal indicative of the angle may be generated as a weighted sum of the first intermediate signal and the second intermediate signal. At least one of the first and second hardware elements is controlled by on the result signal.

    LOW-POWER TILT-COMPENSATED POINTING METHOD AND CORRESPONDING POINTING ELECTRONIC DEVICE
    16.
    发明申请
    LOW-POWER TILT-COMPENSATED POINTING METHOD AND CORRESPONDING POINTING ELECTRONIC DEVICE 有权

    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′).

    Lid angle detection
    18.
    发明授权
    Lid angle detection 有权

    公开(公告)号：US12146894B2

    公开(公告)日：2024-11-19

    申请号：US17827395

    申请日：2022-05-27

    Applicant: STMICROELECTRONICS S.r.l.

    Inventor： Federico Rizzardini ,  Lorenzo Bracco

    IPC: G01P15/18 ,  G01D1/16 ,  G01D5/14 ,  G09F9/30

    Abstract: The present disclosure is directed to a device and method for lid angle detection that is accurate even if the device is activated in an upright position. While the device is in a sleep state, first and second sensor units measure acceleration and angular velocity, and calculate orientations of respective lid components based on the acceleration and angular velocity measurements. Upon the device exiting the sleep state, a processor estimates the lid angle using the calculated orientations, sets the estimated lid angle as an initial lid angle, and updates the initial lid angle using, for example, two accelerometers; two accelerometers and two gyroscopes; two accelerometers and two magnetometers; or two accelerometers, two gyroscopes, and two magnetometers.

    Method for detecting an open or closed state of a foldable electronic device
    20.
    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.

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