# US 2025/0153218 A1 · Method for controlling vibration device, and electronic device supporting same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2025/0153218 A1 - Document ID: US20250153218A1 - Status: Published application - Kind: A1 - Application number: 19/026,397 - Filed: 2025-01-17 - Published: 2025-05-15 - Earliest claimed: 2022-07-22 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Wookwang LEE; Yudong BAE; Sungmin HONG - Web page: https://patentgrep.com/patent/US20250153218A1 ## CPC - B06B 1/0246: {with a feedback signal} - G06F 3/016: {Input arrangements with force or tactile feedback as computer generated output to the user} - H02P 25/032: Reciprocating, oscillating or vibrating motors - H02P 29/032: Preventing damage to the motor, e.g. setting individual current limits for different drive conditions - H02P 29/60: Controlling or determining the temperature of the motor or of the drive (H02P29/02 takes precedence) - B06B: METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, {e.g.} FOR PERFORMING MECHANICAL WORK IN GENERAL (for particular applications, see the relevant subclasses, e.g. B07B1/40, B23Q17/12, B24B31/06; measurement of mechanical vibrations G01H; in direction finding, locating, distance or velocity measuring G01S; {generating seismic energy G01V1/02}; control of mechanical vibrations in general G05D; sound-producing devices, e.g. bells, sirens, whistles G10K, {e.g. methods or devices for transmitting, conducting, or directing sound in general G10K11/00}; generation of electrical oscillations H03B; electromechanical resonators in general H03H; electromechanical transducers {for communication techniques, e.g. microphones, speakers} H04R) - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H02P: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS ## Abstract According to an embodiment, provided may be an electronic device comprising a vibration device, at least one processor electrically connected to the vibration device, and a memory for storing instructions, wherein the instructions, when executed by the at least one processor, cause the electronic device to: increase or decrease a vibration frequency of the vibration device for a predetermined period of time; on the basis of a signal output from the vibration device, obtain a resonant frequency of the vibration device; determine a vibration frequency causing the output of the vibration device at a temperature higher than room temperature to be less than the output at room temperature, as a driving frequency of the vibration device; and control the vibration device to be driven at the determined driving frequency. Various other embodiments are possible. ## Claims ### Claim 1 An electronic device, comprising: a vibration device; at least one processor electrically connected to the vibration device; and memory storing instructions, wherein the instructions, when executed by the at least one processor, cause the electronic device to: increase or decrease a vibration frequency of the vibration device during a preconfigured time; acquire a resonant frequency of the vibration device based on a signal output from the vibration device while the vibration device vibrates at the increased or decreased vibration frequency; determine, based on the acquired resonant frequency, as a driving frequency of the vibration device, a vibration frequency at which an output of the vibration device at a temperature higher than a room temperature is smaller than that at the room temperature; and control the vibration device so that the vibration device is driven at the determined driving frequency. ### Claim 2 (depends on 1) The electronic device of claim 1, wherein the instructions, when executed by the at least one processor, cause the electronic device to continuously increase the vibration frequency from a preconfigured minimum vibration frequency to a preconfigured maximum vibration frequency. ### Claim 3 (depends on 2) The electronic device of claim 2, wherein the instructions, when executed by the at least one processor, cause the electronic device to acquire, as the resonant frequency, a vibration frequency at which a size of a back-electromotive force output from the vibration device is maximized, while the vibration device vibrates at the increased or decreased vibration frequency. ### Claim 4 (depends on 1) The electronic device of claim 1, further comprising a magnetic field sensor configured to convert a strength of a magnetic field output from the vibration device into a form of voltage, wherein the instructions, when executed by the at least one processor, cause the electronic device to acquire, as the resonant frequency, a vibration frequency at which a size of a voltage converted by the magnetic field sensor is maximized. ### Claim 5 (depends on 1) The electronic device of claims 1, wherein the instructions, when executed by the at least one processor, cause the electronic device to store the acquired driving frequency in the memory. ### Claim 6 (depends on 1) The electronic device of claim 1, wherein the instructions, when executed by the at least one processor, cause the electronic device to determine a vibration frequency within a range from the acquired resonant frequency to a preconfigured maximum vibration frequency as the driving frequency. ### Claim 7 (depends on 1) The electronic device of claim 1, wherein the instructions, when executed by the at least one processor, cause the electronic device to: acquire a driving temperature of the vibration device; acquire a driving frequency change value of the vibration device based on the driving temperature and a prestored table including a frequency for each temperature; and control the vibration device so that the vibration device is driven at a driving frequency to which the acquired driving frequency change value has been applied. ### Claim 8 (depends on 1) The electronic device of claim 1, wherein the instructions, when executed by the at least one processor, cause the electronic device to: acquire a driving temperature of the vibration device; acquire a driving voltage change value of the vibration device based on the driving temperature and a prestored table including a voltage for each temperature; and control the vibration device so that the vibration device is driven according to a driving voltage to which the acquired driving voltage change value has been applied. ### Claim 9 (depends on 8) The electronic device of claim 8, wherein the instructions, when executed by the at least one processor, cause the electronic device to: acquire a vibration amount output from the vibration device in response to the driving voltage to which the acquired driving voltage change value has been applied; determine a driving voltage which causes the vibration device to output a target vibration amount based on the acquired vibration amount; and control the vibration device so that the vibration device is driven according to the determined driving voltage. ### Claim 10 (depends on 8) The electronic device of claim 8, wherein the instructions, when executed by the at least one processor, cause the electronic device to: in case that a vibration frequency smaller than the resonant frequency is determined as the driving frequency, adjust the driving frequency so that the driving frequency is reduced in proportion to an increase in the driving temperature with respect to the room temperature; and control the vibration device so that the vibration device is driven at the adjusted driving frequency. ### Claim 11 An operation method of an electronic device, the operation method comprising: increasing or decreasing a vibration frequency of a vibration device during a preconfigured time; acquiring a resonant frequency of the vibration device based on a signal output from the vibration device while the vibration device vibrates at the increased or decreased vibration frequency; determining, based on the acquired resonant frequency, as a driving frequency of the vibration device, a vibration frequency at which an output of the vibration device at a temperature higher than a room temperature is smaller than that at the room temperature; and controlling the vibration device so that the vibration device is driven at the determined driving frequency. ### Claim 12 (depends on 11) The operation method of claim 11, wherein the increasing or decreasing of the vibration frequency comprises continuously increasing the vibration frequency from a preconfigured minimum vibration frequency to a preconfigured maximum vibration frequency. ### Claim 13 (depends on 12) The operation method of claim 12, wherein the acquiring of the resonant frequency of the vibration device comprises acquiring, as the resonant frequency, a vibration frequency at which a size of a back-electromotive force output from the vibration device is maximized, while the vibration device vibrates at the increased or decreased vibration frequency. ### Claim 14 (depends on 11) The operation method of claim 11, wherein the acquiring of the resonant frequency of the vibration device comprises acquiring, as the resonant frequency, a vibration frequency at which a size of a voltage converted by a magnetic field sensor configured to convert a strength of a magnetic field output from the vibration device into a form of voltage is maximized. ### Claim 15 (depends on 11) The operation method of claim 11, further comprising storing the acquired driving frequency in a memory.