公开(公告)号：US20230161424A1

公开(公告)日：2023-05-25

申请号：US18099372

申请日：2023-01-20

Applicant: STMicroelectronics S.r.L.

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

IPC: G06F3/0346 ,  G06F3/038

CPC classification number: G06F3/0346 ,  G06F3/038 ,  G01P15/18

Abstract: A pointing electronic device is provided with: an inertial measurement module, to generate motion input data, indicative of motion of the pointing electronic device, at an input data rate; a pointing determination unit, to implement a pointing algorithm at a processing data rate based on the motion input data, to generate screen-frame displacement data corresponding to 3D-space movements of the pointing electronic device, the processing data rate being higher than the input data rate. The pointing electronic device is further provided with a rate upscaling unit, interposed between the inertial measurement module and the pointing determination unit, to implement a data-rate upscaling of the motion input data, to generate upscaled motion input data to be processed by the pointing determination unit at a data rate matching the processing data rate, via a predictive data reconstruction of missing samples based on the actual motion input data.

公开(公告)号：US11599178B2

公开(公告)日：2023-03-07

申请号：US17168110

申请日：2021-02-04

Applicant: STMICROELECTRONICS S.r.l.

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

IPC: G06F1/00 ,  G06F1/3206 ,  G06N20/00 ,  G06F1/16 ,  G06F1/3296

Abstract: An electronic device has sensing circuitry and control circuitry. The control circuitry generates, based on generated sensor data, information indicative of movement of the electronic device. The control circuitry generates control signals to control operation of the electronic device in a plurality of power states, including a working-power state, an intermediate-power state and a low-power state, based on the information indicative of movement.

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.

公开(公告)号：US11163381B2

公开(公告)日：2021-11-02

申请号：US16924792

申请日：2020-07-09

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Federico Rizzardini ,  Lorenzo Bracco

IPC: G06F3/0346 ,  G09G5/08 ,  G06F3/038 ,  G06F3/0354

Abstract: A low-power pointing method and an electronic device are disclosed. In an embodiment, an electronic device includes a first processor configured to receive attitude quaternion data, indicative of an orientation of the electronic device in a 3D-space, generated by a sensor-fusion algorithm from joint processing of an acceleration signal, indicative of acceleration acting on the electronic device along three reference axes of the 3D-space, and of a gyroscope signal, indicative of angular rate of rotation of the electronic device about the three reference axes of the 3D-space, process the quaternion data to determine an orientation difference between a current orientation and a previous orientation of the electronic device in the 3D-space, translate the orientation difference from the quaternion space to a tilt-compensated angular rate of rotation of the electronic device in the 3D-space and generate screen-frame displacement data based on the tilt-compensated angular rate of rotation.

公开(公告)号：US20210240285A1

公开(公告)日：2021-08-05

申请号：US17162446

申请日：2021-01-29

Applicant: STMicroelectronics S.r.l.

Inventor： Federico Rizzardini ,  Stefano Paolo Rivolta ,  Lorenzo Bracco

IPC: G06F3/0346 ,  G06F3/0487

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.

公开(公告)号：US20210034170A1

公开(公告)日：2021-02-04

申请号：US16924792

申请日：2020-07-09

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Federico Rizzardini ,  Lorenzo Bracco

IPC: G06F3/0346 ,  G06F3/038 ,  G09G5/08 ,  G06F3/0354

Abstract: A low-power pointing method and an electronic device are disclosed. In an embodiment, an electronic device includes a first processor configured to receive attitude quaternion data, indicative of an orientation of the electronic device in a 3D-space, generated by a sensor-fusion algorithm from joint processing of an acceleration signal, indicative of acceleration acting on the electronic device along three reference axes of the 3D-space, and of a gyroscope signal, indicative of angular rate of rotation of the electronic device about the three reference axes of the 3D-space, process the quaternion data to determine an orientation difference between a current orientation and a previous orientation of the electronic device in the 3D-space, translate the orientation difference from the quaternion space to a tilt-compensated angular rate of rotation of the electronic device in the 3D-space and generate screen-frame displacement data based on the tilt-compensated angular rate of rotation.

公开(公告)号：US10747330B2

公开(公告)日：2020-08-18

申请号：US16125515

申请日：2018-09-07

Applicant: STMICROELECTRONICS S.R.L.

Inventor： Antonio Micali ,  Alberto Zancanato ,  Federico Rizzardini

IPC: G06F3/01 ,  G01B7/30 ,  G01C19/00 ,  G01P15/00 ,  G01V3/08 ,  G01C17/38 ,  G01C21/16 ,  G01C21/10 ,  G01C21/00

Abstract: An electronic device determines an estimate of angular position based on an accelerometric signal supplied by an accelerometric sensor and as a function of at least one of a gyroscopic signal from a gyroscopic sensor and a magnetic signal from 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 and an input signal indicative of the magnetic signal and generates a geomagnetic quaternion. The second processing block receives a signal indicative of the gyroscopic signal (gyro) and generates a gyroscopic quaternion. The combination block determines the estimate ({circumflex over (q)}) of angular position by complementarily combining the geomagnetic quaternion and the gyroscopic quaternion based on a combination factor that has a dynamic value and an adaptive value and that varies as a function of the operating conditions.

公开(公告)号：US12287922B2

公开(公告)日：2025-04-29

申请号：US18512944

申请日：2023-11-17

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Federico Rizzardini ,  Lorenzo Bracco

IPC: G06F3/01

Abstract: A recognition system for recognition of a gesture of bringing an electronic device, of a mobile or wearable type, to a user's ear, designed to be integrated in the electronic device and having: a movement sensor, configured to provide a movement signal indicative of the movement of the electronic device; an electrostatic charge variation sensor, configured to provide a charge variation signal associated with the movement; a processing module, operatively coupled to the movement sensor and to the electrostatic charge variation sensor and configured to perform a joint processing of the movement signal and the charge variation signal for the recognition of the gesture.

公开(公告)号：US12259760B2

公开(公告)日：2025-03-25

申请号：US18183464

申请日：2023-03-14

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Federico Rizzardini ,  Lorenzo Bracco

IPC: G06F1/16 ,  G01C1/00 ,  G01C9/08 ,  G01C19/5705 ,  G01P3/44 ,  G06F1/3246 ,  H04M1/02

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.

公开(公告)号：US20250068263A1

公开(公告)日：2025-02-27

申请号：US18944811

申请日：2024-11-12

Applicant: STMicroelectronics S.r.l.

Inventor： Stefano Paolo Rivolta ,  Federico Rizzardini

IPC: G06F3/0346 ,  G06F3/0354

Abstract: A method includes receiving electrostatic sensor data in a processor of an electronic device from an electrostatic sensor mounted behind a touchscreen of the electronic device and using the electrostatic sensor data to determine when the touchscreen is being used. Based on whether or not the touchscreen is being used, an on-table detection (OTD) algorithm is selected from a plurality of available OTD algorithms. In one or more examples, the OTD algorithm may also be selected based on the current device mode of the electronic device, which may be determined from a lid angle, a screen angle, and a keyboard angle of the electronic device. The selected OTD algorithm is run to determine whether or not the electronic device is located on a stationary or stable surface.