EP-4474957-B1 - ELECTRONIC DEVICE AND NOISE CANCELLATION METHOD THEREOF

EP4474957B1EP 4474957 B1EP4474957 B1EP 4474957B1EP-4474957-B1

Inventors

HUANG, CHAO SHUAN
TSAI, Jin-Rong
CHEN, CHIEN CHOU
CHEN, PO-FEI

Dates

Publication Date: 20260513
Application Date: 20240412

Claims (12)

An electronic device (100, 200), comprising: a driver (110, 210), configured to generate a driving signal (DRV), and generate a noise prediction signal (PNS) according to the driving signal; a driven device (120, 220), coupled to the driver and receiving the driving signal to execute an operation, wherein the driven device generates a vibration noise (NS) according to generated vibrations when executing the operation; and an inertial measurement device (130, 230), coupled to the driver, wherein the inertial measurement device is configured to sense a position status of the electronic device to generate sensing information (SI), and the inertial measurement device receives the noise prediction signal (PNS), and compensates the sensing information according to the noise prediction signal to generate compensated sensing information (CSI).
The electronic device according to claim 1, wherein the sensing information comprises the vibration noise generated by the driven device and the sensing information generated by the position status of the electronic device.
The electronic device according to claim 2, wherein the inertial measurement device cancels the vibration noise in the sensing information according to the noise prediction signal to obtain the compensated sensing information.
The electronic device according to claim 1, wherein the driver comprises look-up information, and the driver generates the noise prediction signal according to the driving signal based on the look-up information.
The electronic device according to claim 4, wherein the look-up information comprises a plurality of strengths of the driving signal and a plurality of respective corresponding values of the noise prediction signal.
The electronic device according to claim 1, wherein the driver generates the driving signal through a damping control mechanism.
The electronic device according to claim 1, wherein the inertial measurement device (230) comprises: an inertial measurement apparatus (232), configured to sense the position status of the electronic device to generate the sensing information; and an inertial measurement apparatus driving circuit (231), coupled to the driver and the inertial measurement apparatus, receiving the noise prediction signal and the sensing information, and compensating the sensing information according to the noise prediction signal to generate the compensated sensing information.
A noise cancellation method, applicable to an electronic device (100, 200), comprising: generating (S410) a driving signal (DRV), and generating a noise prediction signal (PNS) according to the driving signal; receiving (S420), by a driven device (120, 220), the driving signal to execute an operation, wherein the driven device generates a vibration noise (NS) according to generated vibrations when executing the operation; sensing (S430), by an inertial measurement device (130, 230), a position status of the electronic device to generate sensing information (SI), and compensating the sensing information according to the noise prediction signal to generate compensated sensing information (CSI).
The noise cancellation method according to claim 8, wherein the sensing information comprises the vibration noise generated by the driven device and position information of the electronic device.
The noise cancellation method according to claim 8, wherein the step of generating the compensated sensing information comprises: cancelling, by the inertial measurement device, the vibration noise in the sensing information according to the noise prediction signal to obtain the compensated sensing information.
The noise cancellation method according to claim 8, wherein the step of generating the noise prediction signal according to the driving signal comprises: generating the noise prediction signal according to the driving signal based on look-up information, wherein the look-up information comprises a plurality of strengths of the driving signal and a plurality of respective corresponding values of the noise prediction signal.
The noise cancellation method according to claim 8, further comprising: generating the driving signal through a damping control mechanism.

Description

BACKGROUND Technical Field The disclosure relates to an electronic device and a noise cancellation method thereof, and in particular to an electronic device and a noise cancellation method thereof which can improve position sensing accuracy. Description of Related Art With the advancement of electronic technology, electronic products have become important tools in lives of people. In order to enhance the operating experience of electronic devices, the current electronic devices often sense the position statuses of the electronic devices as reference information for human-machine interfaces. Since the electronic device includes various elements, the elements may generate a certain degree of vibrations when executing operations. Therefore, when sensing the position status of the electronic device, the vibration noise generated by the vibrations causes errors in the sensing of the position status. The errors distort the position tracking operation of the electronic device, and cause errors and even risks of failure of human-machine operations. Attention is drawn to US 2018/113148 A1 providing techniques for compensating for inertial and/or magnetic interference in a mobile device. The mobile device can include a vibration motor to vibrate the device, a processor, and can include an inertial sensor and/or a magnetometer. The processor can be configured to actuate the vibration motor to induce vibration of the mobile device, to measure motion of the mobile device with the inertial sensor of the device to produce sensor output data and/or to measure a magnetic field generated by the vibration motor to produce magnetometer output data, and to compensate for the vibration of the inertial sensor induced by the vibration motor to produce compensated sensor output data and/or to compensate for a magnetic field generated by the vibration motor when the vibration motor is actuated to produce compensated magnetometer output data. SUMMARY The present invention is set forth in the independent claims, respectively. Further embodiments of the invention are described in the dependent claims. The disclosure provides an electronic device and a noise cancellation method thereof, which can improve the accuracy of position status sensing. An electronic device of the disclosure includes a driver, a driven device, and an inertial measurement device. The driver is configured to generate a driving signal, and generate a noise prediction signal according to the driving signal. The driven device is coupled to the driver. The driven device receives the driving signal to execute an operation. The driven device generates a vibration noise according to generated vibrations when executing the operation. The inertial measurement device is coupled to the driver. The inertial measurement device is configured to sense a position status of the electronic device to generate sensing information. The inertial measurement device receives the noise prediction signal, and compensates the sensing information according to the noise prediction signal to generate compensated sensing information. A noise cancellation method of the disclosure includes: generating a driving signal, and generating a noise prediction signal according to the driving signal; receiving, by a driven device, the driving signal to execute an operation, wherein the driven device generates a vibration noise according to generated vibrations when executing the operation; sensing, by an inertial measurement device, a position status of an electronic device to generate sensing information, and compensating the sensing information according to the noise prediction signal to generate compensated sensing information. Based on the above, the electronic device of the disclosure generates the noise prediction signal according to the driving signal, and compensates the sensing information corresponding to the position status of the electronic device according to the noise prediction signal, which can effectively reduce the impact caused by the vibration noise in the sensing information to effectively improve the signal to noise ratio of the sensing information and improve the accuracy of position sensing of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the disclosure.FIG. 2 is a schematic diagram of an electronic device according to another embodiment of the disclosure.FIG. 3 is an energy comparison diagram of vibration noises before and after a first order noise compensation operation of an electronic device according to an embodiment of the disclosure.FIG. 4 is a flowchart of a noise cancellation method according to an embodiment of the disclosure. DESCRIPTION OF THE EMBODIMENTS Please refer to FIG. 1. FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the disclosure. An electronic device 100 includes a driver 110, a driven device 120, and an inertial measurement devi