公开(公告)号：US20230198442A1

公开(公告)日：2023-06-22

申请号：US18082301

申请日：2022-12-15

申请人： Alps Alpine Co., LTD

发明人： Hitoshi Shirashima ,  Kazuhiko Kinemura

IPC分类号： H02P25/034 ,  H02K33/18 ,  G06F3/01

CPC分类号： H02P25/034 ,  H02K33/18 ,  G06F3/016

摘要： A drive signal output section of a vibration generator outputs a one-shot drive signal, as a first drive signal, that rises on a positive side when a vibrator is vibrated, that has a voltage changing on the positive side, and that applies force to move the vibrator or a vibration target vibrated in conjunction with the vibration of the vibrator in a first direction, and thereafter, outputs a one-shot drive signal, as a second drive signal, such that a timing when a movement of the vibrator or the vibration target peaks in a second direction that is opposite to the first direction coincides with a timing of start of rise of the signal, so as to increase amplitude of the vibration of the vibrator or the vibration target by the one-shot signal that is not displaced on a negative side.

公开(公告)号：US11658548B2

公开(公告)日：2023-05-23

申请号：US17396847

申请日：2021-08-09

申请人： OMRON Corporation

发明人： Ryuji Kawamoto

IPC分类号： H02K11/225 ,  H02K41/035 ,  H02P25/034

CPC分类号： H02K11/225 ,  H02K41/0356 ,  H02P25/034

摘要： A voice coil motor (VCM) according to one or more embodiments may include a casing, a permanent magnet, a yoke and iron-core, a bobbin, and a coil part. The coil part may include a drive and primary coil serving as a drive coil and a primary coil of a displacement sensor including a differential transformer, the drive and primary coil being interlinked with a magnetic flux by the permanent magnet, and two secondary coils of the displacement sensor. The yoke and iron-core may be disposed in a central space defined in the coil part, and serves as an iron core of the displacement sensor.

公开(公告)号：US11637519B2

公开(公告)日：2023-04-25

申请号：US17733181

申请日：2022-04-29

申请人： Google LLC

发明人： Artem Dementyev ,  Richard Francis Lyon ,  Alex Olwal

IPC分类号： H02P25/034

摘要： The present disclosure provides systems and methods for using a linear resonant actuator (“LRA”) to determine a type of contact between a device and its surroundings. The LRA may be coupled to an amplifier by one or more switches. The audio amplifier may receive a signal from a microcontroller and transmit the signal the LRA when the switches are closed. When the switches are in an open position, the LRA may be actively sensing for the type of contact. The back EMF may be measured when the switches are open. The measured back EMF waveform may be used to determine the type of contact. When the signal is not being transmitted, the LRA may be passively sensing to determine whether the device was tapped.

公开(公告)号：US11588428B2

公开(公告)日：2023-02-21

申请号：US17559405

申请日：2021-12-22

申请人： Alps Alpine Co., LTD

发明人： Yuzo Sasaki

IPC分类号： H02P25/034 ,  H02P21/14

摘要： One form of a motor control device includes: a waveform generation unit and an amplifier that generate a drive voltage of a voice coil motor (VCM); a DC offset detection unit that detects a DC offset of the drive voltage; a stop control unit that stops application of the drive voltage to a motor coil when the detected DC offset exceeds an operation stop threshold; a temperature correction value setting unit that sets a temperature correction value corresponding to the DC offset when the detected DC offset is lower than the operation stop threshold; a thermistor that detects an ambient temperature; and a vibration level control unit that varies the drive voltage and controls an amplitude level based on the detected ambient temperature and the set temperature correction value.

公开(公告)号：US11584637B2

公开(公告)日：2023-02-21

申请号：US16109947

申请日：2018-08-23

申请人： Massachusetts Institute of Technology

发明人： William Kai Langford ,  Amanda Ghassaei ,  Neil Gershenfeld

IPC分类号： B81B7/00 ,  B81B3/00 ,  H02K41/035 ,  B81C1/00 ,  H02P7/025 ,  H02P25/034

摘要： A system of flexural, actuating, and semiconducting elements of part-types necessary to assemble actuated robotic systems. These parts are joined with a common interface, interlocking with neighboring parts to form a regular lattice structure. Primary considerations for the design of the part interfaces include ease of assembly and the ability to transfer mechanical loads and electronic signals to neighboring parts. The parts are designed to be assembled vertically so structures can he built incrementally one part at a time. They can be easily fabricated at a range of length-scales using a variety of two-dimensional manufacturing processes. These processes include, for example, stamping and laminating, which enable high-throughput production. The simple mechanical interfaces between parts also enable disassembly allowing for reconfigurability and reuse. The interlocking nature of these assemblies allows loads to be distributed through many parallel load-paths.

公开(公告)号：US11515817B2

公开(公告)日：2022-11-29

申请号：US16937906

申请日：2020-07-24

申请人： SILICON TOUCH TECHNOLOGY INC.

发明人： Chi-Yuan Chin

IPC分类号： H04R9/02 ,  H02P25/034 ,  H02K41/035 ,  H02P7/025

摘要： A voice coil motor driving device and a method for providing control signals of the same are provided. The voice coil motor driving device includes a control module, a current driving module, and an input module. The current driving module outputs a plurality of digital current signals according to a driving signal, each of the plurality of digital current signals includes a plurality of current unit signals, and each of the plurality of digital current signals is arranged in a first time period, each of the plurality of digital current signals includes a plurality of reverse current unit signals, and the plurality of reverse current unit signals are arranged in a second time period, which is at a beginning of the first time period, or arranged in a third time period, which is at the end of the first time period.

公开(公告)号：US20220224269A1

公开(公告)日：2022-07-14

申请号：US17148100

申请日：2021-01-13

申请人： QUALCOMM Incorporated

发明人： Liangguo SHEN ,  Joseph Dale RUTKOWSKI ,  Joshua ZAZZERA ,  Nathaniel SALAZAR

IPC分类号： H02P25/034 ,  G08B6/00

摘要： In some implementations, a measurement circuit may drive, using a first transistor, a first node of a haptic load. The measurement circuit may trigger a first comparator when a voltage driving the haptic load satisfies a first condition. The first comparator may have a first node connected, in parallel, to a drain of a second transistor and may have a second node connected to the first node of the haptic load. Additionally, the second transistor may have a gate connected to a gate of the first transistor and may have the drain connected to a first reference current.

公开(公告)号：US11374522B2

公开(公告)日：2022-06-28

申请号：US16906364

申请日：2020-06-19

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： David Hernandez ,  Supriyo Palit

IPC分类号： H02P25/034 ,  G05B19/4155 ,  H02P23/00

摘要： Disclosed embodiments include an apparatus for closed loop control of a linear resonant actuator comprising a motor drive circuit configured to provide a motor drive signal, a current and voltage sensing circuit coupled to the output terminal of the motor drive circuit and across the motor, and having current sense and a voltage sense outputs. A resonant frequency and back emf extraction circuit receives the current sense and voltage sense outputs, and outputs a resonant frequency signal output and a measured back emf signal output. An actuator model circuit has inputs coupled to the output of the motor drive circuit, the resonant frequency signal output, and a mechanical system quality factor signal generated by an adaptation circuit having an input coupled to the error summing circuit output. The error summing circuit has inputs coupled to the output of the actuator model and the measured back emf signal.

公开(公告)号：US20220200432A1

公开(公告)日：2022-06-23

申请号：US17127977

申请日：2020-12-18

申请人： Apple Inc.

发明人： Onur I. ILKORUR ,  Xin LUO ,  Christopher WILK ,  Aneesh R. KUDEKAR

IPC分类号： H02K33/18 ,  H02P25/034

摘要： Aspects of the subject technology relate to a shaker module for an electronic device. The shaker module may include a movable component that is resiliently suspended in relation to a voice coil by one or more gap-separated pairs of the flat springs. The flat springs reduce the z-height of the shaker module for implementation in, for example, compact electronic devices. The gap-separated pairs of flat springs facilitate adjustment of the resonance frequency of the shaker module substantially independently of adjustments to drop performance, while providing stability against unwanted rocking motions of the movable component.

公开(公告)号：US11260526B2

公开(公告)日：2022-03-01

申请号：US16395408

申请日：2019-04-26

申请人： Yamaha Corporation

发明人： Masao Noro

IPC分类号： B25J9/16 ,  B25J9/12 ,  G05B19/416 ,  G05D3/12 ,  H02P25/034 ,  B25J19/00 ,  H03K17/687

摘要： Provided is a driving control apparatus that can control relaxation of force in an actuator. The driving control apparatus is provided with: a driving control unit configured to control driving of the actuator according to a driving control signal; and a pressure control unit configured to control, according to a pressure control signal, involvement of the driving control signal in control of pressure to be generated by the actuator.