Abstract: A motor vibration control method and an electronic device can implement vibration of a motor when a loading capability of a battery is low. A battery status is obtained when a first motor vibration waveform vibration request is received. The battery status includes a battery temperature, a battery temperature and a battery level, or a battery power supply capability. A motor vibration parameter is switched if the battery status meets a preset condition, where the preset condition is that the battery power supply capability is lower than a first threshold, the battery temperature is lower than a second threshold, or the battery temperature and the battery level are lower than a third threshold array. The motor vibration parameter includes a motor vibration waveform or a motor vibration input voltage. The motor is driven to vibrate based on a switched motor vibration parameter.

Abstract: A tactile sensation providing apparatus includes a linear resonant actuator; and circuitry configured to provide a pulse wave to the linear resonant actuator as a driving signal. The circuitry is further configured to, when a frequency of the pulse wave is smaller than a resonance frequency of the linear resonant actuator, set a pulse width of the pulse wave at a value smaller than a half of a reciprocal of the frequency of the pulse wave.

Abstract: A control apparatus to control a vibration motor includes a control unit. The vibration motor includes a vibration body and a contact body contacting the vibration body. The control apparatus applies alternating voltages, generated based on pulse width and frequency of pulse signals, to an electro-mechanical energy conversion element of the vibration motor to cause relative movement between the vibration and contact bodies at a target velocity. The pulse width and the frequency are (i) set such that a first steady velocity exceeds the target velocity, before the relative movement starts, and (ii) changed such that a second steady velocity is less than the first steady velocity, after the relative movement starts, and before an actual velocity at a time of the relative movement exceeds the target velocity. The pulse width or the frequency is controlled such that the relative movement is performed at the target velocity.

Abstract: The driving apparatus comprises a vibrating body which includes an electro-mechanical energy conversion device, and drives a vibration-wave motor which moves the vibrating body and a driven body relatively to each other. The electro-mechanical energy conversion device has sensor electrodes that output detecting signals corresponding to vibrations of the vibrating body. Based on the detecting signals, the driving apparatus determines a direction in which the vibrating body and the driven body are to be moved relatively to each other.

Abstract: The current document is directed to non-linear haptic actuators that use a rotor, rotor-suspension, and spring subsystem to efficiently generate vibrational forces in various types of devices and appliances in which the non-linear haptic actuators are incorporated. Non-linear haptic actuators can be designed and manufactured to be more space efficient than unbalanced-electric-motor and linear-resonant vibration modules and, because most of the frictional forces produced in unbalanced-electric-motor and linear-resonant vibration modules are eliminated from non-linear haptic actuators, non-linear haptic actuators are generally more power efficient and robust than unbalanced-electric-motor and linear-resonant vibration modules.

Abstract: A method for constructing a motor vibration model is provided. In this method, a first condition combination and a second condition combination in a game scene and vibration effects corresponding to the condition combinations are received, the vibration effects including a vibration type and a vibration amplitude. The first condition combination, the second condition combination and the corresponding vibration effects may be digitally processed, respectively. A vibration type model may be constructed according to the first condition combination and the vibration type that have been digitally processed, and a vibration amplitude model may be constructed according to the second condition combination and the vibration amplitude that have been digitally processed. The vibration type model and the vibration amplitude model jointly constitute the motor vibration model. A game-scene-based haptics implementation method, an electronic device and a computer-readable storage medium are also provided.

Abstract: A vibration assembly for a surface compactor machine includes a support subassembly connected to the compacting surface of the surface compactor machine. A primary eccentric shaft is disposed around a secondary eccentric shaft, with the primary and secondary eccentric shafts both rotatable about a common axis of rotation. One or more of primary bearing subassemblies is disposed between the primary eccentric shaft and the support subassembly for supporting the primary eccentric shaft during rotation of the primary eccentric shaft. One or more secondary bearing subassemblies is disposed between the secondary eccentric shaft and the primary eccentric shaft for supporting the secondary eccentric shaft during rotation of the primary eccentric shaft.

Abstract: A device and method are provided for treating a patient with vibration and/or tactile and/or thermal stimuli. The device includes first and second stimulating units for generating first and second stimuli respectively. The stimuli are vibration and/or tactile and/or thermal stimuli, and each of the stimuli is repeated on average at a frequency of 1 to 60 Hz. The stimuli are generated partly at different times.

Abstract: A vibration module is assembled inside a device body of the electronic device and includes: a driving motor and a packaging structure arranged outside the driving motor. The driving motor can cooperate with a sounding part of the packaging structure when in a first vibration mode, and drive the sounding part to generate a vibrating sound wave; and the driving motor can cooperate with at least one function module of the device body when in a second vibrating mode, and drive the function module to vibrate, thereby simplifying the structure of the vibration module, reducing the occupied inner space of the electronic device by the vibration module, and reducing the cost of the electronic device.

Abstract: A controllable magneto-rheological device includes an annular cylinder formed by inner and outer walls connected at first and second opposing ends and forming an inner shaft configured to receive an operational component of an engine, generator or other device including one or more rotating structures. A magneto-rheological fluid is provided to fill a volume between the inner and outer walls of the annular cylinder. A plurality of electro-magnetic coils are positioned around the outer wall of the annular cylinder. One or more current controllers are coupled to the plurality of electro-magnetic coils for introducing a current through each of the electro-magnetic coils and corresponding magnetic flux through the magneto-rheological fluid. A level of current provided to each of the plurality of electro-magnetic coils directly affects the viscosity of the magneto-rheological fluid and thus the stiffness and damping levels of the controllable magneto-rheological device.

Abstract: A reference oscillator for a transmitter and/or a receiver of electromagnetic signals. The reference oscillator is suitable for generating a modified reference signal alternating ON times and OFF times with a predefined duty cycle from a signal supplied by a reference resonator. The reference oscillator also includes an adjustment circuit suitable for adjusting the duty cycle of the modified reference signal according to at least one adjustment parameter dependent on a rank of at least one harmonic component of the modified reference signal so as to minimize at least one harmonic component of the modified reference signal. A frequency synthesizer and a radio frequency signal receiver can include such a reference oscillator.

Abstract: A linear vibration motor for fixing a ring-shaped coil provided within the linear vibration motor using a simpler structure. A linear vibration motor in which an upper casing and a bracket are configured to have an integrated shape and fixed to the inside or upper side of the coil to form magnetism, thereby facilitating fabrication due to a simple structure, preventing a reduction of a vibration power through a small space, and minimizing a rise of a material cost. Accordingly, the coil within the internal space of the casing is stably fixed by providing a structure for fixing the coil through the simple process of the bracket itself. Furthermore, since parts forming the vibration motor and the linear vibration motor are integrated, an assembly process is simplified, performance is satisfied by realizing a reduced production cost, and a working process and price competitiveness is secured.

Abstract: A powered surgical tool that includes a housing with a head and a handle that extends from the head. An electric motor is disposed in the head. A trigger extends from the handle. There is a void space in the handle. A plate separates the motor from the handle. Internal to the handle void space there is a rotor sensor and a control circuit. The rotor sensor is able to monitor the magnetic fields emitted by the motor rotor and that pass through the plate. The control circuit receives signals from the rotor sensor representative of the rotational orientation of the rotor and is further able to monitor the actuation of the trigger. Based on the rotor orientation signals and the actuation of the trigger, the control circuit generates signals that result in the selective generation of power signals to the motor rotor.

Abstract: A surgical instrument comprising an end effector, a firing member configured to move longitudinally within the end effector, a drive system coupled to the firing member, an electric motor configured to drive the drive system, a battery, and a control circuit coupled to the electric motor is disclosed. The control circuit comprises a first switching device and a second switching device. The control circuit is configured to deliver a maximum voltage from the battery to the electric motor to apply a first torque to the drive system and selectively deliver an increased voltage to the electric motor to apply a second torque to the drive system. The second torque is greater than the first torque. The increased voltage is greater than the maximum voltage from the battery.

Abstract: A surgical cutting and fastening instrument that is motorized. The instrument comprises in one embodiment a charge accumulator device, separate from a battery, that provides additional power to the motor under certain conditions. In addition, the motor may comprise multiple windings.

Abstract: An assisted steering system with vibrational function for vehicles is applied to a steering system of a vehicle. The steering system has a first steering column and a second steering column, and the assisted steering system includes a speed-adjustable steering device and an electronic control unit. The speed-adjustable steering device is connected between the first steering column and the second steering column and has a motor. The electronic control unit is electrically connected to the motor, generates a vibration driving current when receiving a warning command, combines a steering driving current with the vibration driving current to generate a motor control current, and outputs the motor control current to the motor of the speed-adjustable steering device to excite windings of the motor with the vibration driving current in generation of a vibrational effect.

Abstract: A surgical cutting and fastening instrument that is motorized. The instrument comprises in one embodiment a charge accumulator device, separate from a battery, that provides additional power to the motor under certain conditions. In addition, the motor may comprise multiple windings.

Abstract: A tool and method for operating the tool are provided. The tool includes a housing and a power generator, such as a motor, disposed in the housing. The power generator has an operating parameter, such as rotational speed. A trigger member and associated magnet are displaceable relative to the housing. A plurality of sensors each generate an output signal based on movement of the magnet. A controller receives the output signals from the sensors, determines a base digital integer from each of the output signals, concatenates the base digital integers to form a concatenated digital integer. The controller varies the operating parameter based on the concatenated digital integer.

Abstract: An example wearable device includes a haptic actuator to produce an output haptic vibration in response to a target input signal waveform, a haptic effect sensor located in proximity to the haptic actuator to measure a haptic vibration corresponding to the output haptic vibration and to output a measured haptic vibration waveform and a feedback circuit to modify the target input signal waveform to reduce a difference between the output haptic vibration and a measured haptic vibration waveform.

Abstract: A haptic actuator may include a housing having a top and a bottom. At least one of the top and the bottom may have a shape defining an internal recess therein. The haptic actuator may include a coil carried within the internal recess, and a field member having opposing first and second sides and that includes at least one permanent magnet adjacent the coil. The haptic actuator may also include a respective flexure bearing mounting each of the first and second sides of the field member to be reciprocally movable within the housing responsive to the coil.

Abstract: An electrical machine (1) comprises a rotor (20), a stator (10), a rotor power supply (50), at least one sensor (70) and a rotor magnetization control arrangement (60). The rotor has rotor windings (22) for controlling magnetization of rotor magnetic poles (24). The sensor is arranged to measure a parameter associated with a relative force between the stator and the rotor. The rotor magnetization control arrangement is communicationally connected to the sensor for receiving a signal representing the measured parameter. The rotor magnetic poles are divided into at least two groups (23). The rotor magnetization control arrangement is arranged for controlling the magnetization of the groups individually by providing a respective individually controllable rotor current. The rotor magnetization control arrangement is arranged to individually control the rotor currents in dependence of the signal representing the measured parameter. A method for controlling such an electrical machine is also disclosed.

Abstract: The power tools having integral GPS-based locating means is configured for use as a power tool. The power tools having integral GPS-based locating means is configured for use with the global positioning system (GPS). The power tools having integral GPS-based locating means comprises a power tool, a tracking device, an appropriate authority, and a plurality of messages. The tracking device: 1) is contained within the power tool; and, 2) communicates with the appropriate authority by exchanging a plurality of messages. The tracking device: 1) tracks the GPS location of the power tool; and, 2) provides the GPS coordinates of the power tool to the appropriate authority through the plurality of messages.

Abstract: Systems, devices and methods to access and/or treat targeted body tissue (e.g., tendon tissue, ligament tissue, muscle tissue, bony tissue, and the like) under the guidance of ultrasound imaging equipment are described. Such systems can permit the intra-operative identification of the targeted tissue and the ability to deliver the appropriate instrumentation to that tissue.

Abstract: A switch assembly includes a switch housing, a first switch subassembly, and a second switch subassembly. The first switch subassembly includes a shaft and a toggle button. The shaft is disposed within the switch housing and has a proximal end portion and a distal end portion. The shaft is pivotable relative to the switch housing about at least one pivot axis to actuate at least one function of a surgical instrument. The proximal end portion of the shaft includes a magnet. The toggle button is non-rotatably connected to the distal end portion of the shaft. The second switch subassembly includes a safety bar and a post. The safety bar is axially movable within the switch housing. The post extends through the safety bar such that movement of the safety bar along a longitudinal axis thereof moves the post between a firing position and a non-firing position.

Abstract: A chiller system includes a compressor configured to circulate a refrigerant between an evaporator and a condenser in a closed refrigerant loop and a synchronous motor configured to drive the compressor. The motor includes a stator winding and a rotor. The chiller system includes a controller configured to estimate a flux linkage of the rotor and generate a control signal for the motor based on the estimated flux linkage. Estimating the flux linkage includes applying a voltage of the stator winding to a transfer function having an error correction variable, using a first value of the error correction variable in the transfer function to obtain convergence of the flux linkage over an initial motor starting interval, and using a second value of the error correction variable after the initial motor starting interval to reduce an error in estimating the flux linkage.

Abstract: The present invention provides monitoring a sounding state of a speaker even in a case where any given sound is broadcast. In detecting the sounding state of the speaker with the microphone for sound detection, noises around the speaker are also collected by the microphone for sound detection. Therefore, in a case where there are ambient noises, it is difficult to monitor the sounding state of the speaker.

Abstract: A control system for a multi-phase switched reluctance (SR) machine, having at least two phases, is disclosed. The control system may include a converter circuit and a controller. The controller may include a phase voltage estimator module configured to determine a first phase voltage and a second phase voltage associated with a second phase second phase for the SR machine. The controller may further include a flux estimator module configured to determine first and second estimated fluxes, the first estimated flux associated with the first phase and based on the first phase voltage and an associated first mutual voltage and the second estimated flux the second estimated flux associated with the second phase and based on the second phase voltage and an associated second mutual voltage, and a position observer module configured to determine a rotor position based at least partially on the first estimated flux, the second mutual flux.

Abstract: The invention provides a multi-motor frequency control system and a control method thereof. The system includes an event generation module, a control module, a signal selection module, a motor module including multiple motors, a driving module for driving the motor vibration, a frequency processing module, and a frequency reading module for reading the vibration frequency of at least one motor and giving feedback to the frequency processing module. Further, a control method of the multi-motor frequency control system is also provided.

Abstract: Provided is a sound reduction or vibration damping apparatus that has a new sound control principle where the sound control principle is totally different from a known passive or active sound control apparatus. A sound reduction or vibration damping apparatus 1 includes a mass portion 11, spring portions 12a and 12b placed between the mass portion 11 and a structural member 13, and a control unit 4 for causing the spring constants of the spring portions 12a and 12b to continue changing. The sound reduction or vibration damping apparatus 1 is mounted on the structural member 13 to reduce sound passing through the structural member 13 or sound generated from the structural member, or damp the vibration of the structural member 13.

Abstract: An active bearing at least for vibration reduction is described, comprising a) an interface (7) to be fitted to a load (8); b) at least one support element (3) in an operative connection with the interface (7) and a support unit (6); c) at least one linear actuator (5) supported indirectly or directly on the support unit (6); d) a gear unit (4) for the path transmission of an actuating path change originating from the linear actuator (5), said gear unit being in an operative connection with the at least one linear reactor (5); e) at least one decoupling unit (1), which serves for the decoupling of the static load transfer and for transmitting the dynamic load transfer; wherein the at least one linear actuator (5), the gear unit (4) and the at least one decoupling unit (1) are disposed serially.

Abstract: The present disclosure discloses a linear vibration motor driver including an amplitude and temperature testing unit, a gain controller, and a coil resistance detector and an amplifier. The amplitude and temperature testing unit receives a motor drive input signal and a feedback drive signal output by the amplifier, and outputs a corresponding estimated motor amplitude and real-time temperature according to the motor drive input signal and the feedback drive signal. The amplifier adjusts magnification, amplifies the motor drive input signal according to the magnification and outputs the feedback drive signal to drive the motor. The present disclosure can adjust the magnitude of the drive signal according to current estimated amplitude and maximum amplitude and make corresponding rectification of the amplifier magnification upon too high temperature to extend the service life of the motor.

Abstract: A haptic actuator may include a housing, at least one coil carried by the housing, and a field member movable within the housing responsive to the at least one coil. The housing, at least one coil, and field member may define a resonant frequency. The haptic actuator may also include drive circuitry coupled to the at least one coil and being capable of generating first and second drive waveforms having respective different frequencies spaced about the resonant frequency to drive the field member at a beat frequency lower than the resonant frequency.

Abstract: A motor drive controller includes: a control circuit unit configured to output a drive control signal for driving a motor in response to a command signal externally input to the control circuit unit; and a motor driving unit configured to output a drive signal to the motor based on the drive control signal output from the control circuit unit. The control circuit unit is provided with: a speed setting unit configured to generate a target rotation speed signal corresponding to a target rotation speed based on a command step determined in response to a step command signal and predetermined setting information when the step command signal is input as the command signal; and a drive control signal generating unit configured to generate and output the drive control signal based on the target rotation speed signal.

Abstract: The disclosure relates to a Synchronized Array of Vibration Actuators in a Network Topology providing synchronized arrays of low-cost, readily available vibration actuators to emulate superlative single actuators and bring together sets of these emulated high-performance actuators to create a broad range of desired control effects. Such actuator arrays may operate in both spatial and temporal modes, creating haptic effects that relate to the user via their position and orientation in space. The spatial mode may create h-pulses or the amplitude of a vibrational effect may change based on position of the device. The temporal mode may create vibrational effects that interact with the user to create an awareness of time. Additionally modes include performance, bandwidth, magnitude and reliability modes. The different control modalities may be combined together into a single vector control space, which spans the haptic capabilities of sets and/or subsets of actuators.

Abstract: There are prepared element characteristic information 12 obtained by previously, individually measuring light emission characteristics of a plurality of LED elements and resin coating information 14 that correlates an appropriate amount of resin to be applied for acquiring an LED package exhibiting a specified light emission characteristic and the element characteristic information 12. A map preparation processing section 74 prepares, for each board, map data 18 correlating mounting position information 71a showing position of the LED element mounted on the board by a component mounting device M1 and the element characteristic information 12. There is updated the resin coating information 14 on the basis of an inspection result fed back to a resin coating device M4 as a result of a completed product coated with a resin being inspected by a light emission characteristic inspection device M7.

Abstract: The image display device resolves inconsistency in the brightness of the image while effectively reducing local speckle noise that remains due to the laser scanning of which the scanning speed fluctuates. A waveform pattern (PT2) that includes an on period and an off period within the pixel displaying period (T2) is selected for the center pixel (P512). A waveform pattern (PT1) that includes an on period and an off period within the pixel displaying period (T1) that is longer than the pixel displaying period (T2) is selected for the side pixel (P1) or (P1023) that is scanned at a scanning speed slower than that for the center pixel (P512). Here, the on period in the waveform pattern (PT1) is segmented more than the on period in the waveform pattern (PT1), and the time ratio of the on period accounting for the waveform pattern (PT1) is smaller than the time ratio of the on period accounting for the waveform pattern (PT2).

Abstract: A method is provided for eliminating an electrical short circuit that can be caused by a filamentary tin crystal in an electronics assembly in particular of a motor vehicle. The method includes, but is not limited to providing the electronics assembly, that includes, but is not limited to electrical components with connectors and conductor paths for connecting the components. The components have configurable inputs and outputs. At least two of the inputs and outputs of the electrical components are configured so as to form an input connector and an output connector so that in the event of the electrical short circuit caused by the filamentary tin crystal, a short circuit current flows between the input connector and the output connector, which short circuit current is high enough to destroy the filamentary tin crystal.

Abstract: A drive unit includes an ultrasonic actuator having an actuator body formed using a piezoelectric element, and a driving element provided on the actuator body and configured to output a driving force by moving according to the vibration of the actuator body, and a control section configured to induce the vibration in the actuator body by applying a first and a second AC voltages having a same frequency and different phases to the piezoelectric element. The control section adjusts the first AC voltage and the second AC voltage so that the first AC voltage and the second AC voltage have different voltage values from each other.

Abstract: The present disclosure relates to a mobile terminal capable of providing optimal vibration power through sweeping of vibration frequencies, and a vibration power control method thereof. When a specific touch is detected after setting frequency sweep information in form of a table in a memory, at least one sweep frequency is swept at a preset period within a vibration frequency range exhibiting satisfactory vibration power using the frequency sweep information so as to drive a vibration motor, thereby maintaining vibration power always in an optimal state. Also, a driving voltage of the vibration motor may be dropped to reduce battery consumption while driving the vibration motor, and the sweep frequency range and the sweep period can be adaptively changed according to a type of application displayed on a screen to stably maintain vibration power irrespective of a change in an application.

Abstract: A mobile device that includes a motion sensor, multiple vibrators, and a motor speed determinator module. The motion sensor senses and records vibrations of the mobile device while the multiple vibrators are simultaneously running. The sensed vibrations are transmitted to the motor speed determinator module, which transfers the sensed vibrations into the frequency domain. The vibrations caused by each of the multiple vibrators are represented by peaks in the frequency representation. In one embodiment, the motor speed determinator module drives each vibrator such that the rotational speed and phase of each vibrator are equal or essentially equal. This is represented in the spectral representation of the frequency domain as the overlapping of each peak into a single peak.

Abstract: A method for driving an ultrasonic motor includes setting an upper limit rotation speed that is lower than a rotation speed at a resonance frequency at a lowest temperature of a predetermined operating temperature range and a lower limit frequency that is more than or equal to a resonance frequency at a highest temperature of the operating temperature range, and, when the ultrasonic motor starts, a rotation speed of the ultrasonic motor becomes lower than the upper limit rotation speed and the ultrasonic motor is driven with a driving frequency which is higher than the lower limit frequency.

Abstract: A driving device, including a drive signal generating section configured to variably control a frequency or an amplitude of an application voltage to a vibration member, includes a variable period setting section configured to output a value of a PWM period, the set value being set so that an average value of PWM periods in one target period of the application voltage is one fraction of an integer number of the target period by variably adjusting the PWM periods in an aperiodic manner; a drive waveform information output section; and a variable period PWM signal generating section configured to generate a PWM signal based on the set value of the PWM period output from the variable period setting section and drive waveform information of the application voltage, wherein the drive signal generating section is a digital circuit.

Abstract: A driving unit of a vibration-type actuator includes a command unit, a change making unit, an AC signal generating unit, and a filter unit. The command unit outputs a command signal that directs at least one of a frequency, an amplitude, and a phase difference of an AC signal. The change making unit makes a change to the command signal and outputs the command signal. The AC signal generating unit generates a generated AC signal in which at least one of a frequency, an amplitude, and a phase difference of the generated AC signal is modulated in accordance with the output of the change making unit. The filter unit selectively dampens a frequency component, of at least one of the output signal of the change making unit and an output signal of the AC signal generating unit, that excites vibration other than vibration in a predetermined vibration mode.

Abstract: An improved vibration motor controller and method maintains a substantially consistent vibration over time, despite decreasing battery voltage over time, with the controller used in a mobile communication device, the mobile communication device powered by a battery having a maximum charge voltage and a minimum charge voltage, the controller being operative for monitoring the available voltage at the battery; driving the vibration motor using pulse width modulation with a motor voltage which is less than the minimum charge voltage of the battery; and controlling the pulse width modulation used to drive the vibration motor in a manner to provide a substantially consistent power level despite fluctuations in voltage of the battery.

Abstract: A system includes a controller to control movement of a linear resonant actuator (LRA). The system includes a monitor in the controller to monitor a back electromotive force (BEMF) signal from the LRA representing the movement of the LRA. The monitor generates an indicator that indicates whether or not movement of the LRA has occurred. A primary loop module in the controller controls acceleration and braking of the LRA based on the monitored BEMF signal if the indicator from the monitor indicates that LRA movement has occurred. An alternate cycle module in the controller pushes the LRA at a predetermined frequency if the indicator from the monitor indicates that LRA movement has not occurred. The push is employed to move the LRA when the BEMF signal is undetectable by the monitor with respect to a predetermined threshold.

Abstract: The present invention relates to a piezoelectric cooling control apparatus and method, which set pulse parameters based on the temperature of the heating unit of a cooling target device, and thus control piezoelectric cooling. The piezoelectric cooling control apparatus includes a temperature sensing unit for sensing temperature of a heating unit of a cooling target device. A determination unit determines whether to activate piezoelectric cooling, based on the sensed temperature of the heating unit and a temperature setting range. A setting unit is configured to, if it is determined by the determination unit to activate piezoelectric cooling, set pulse parameters based on the temperature setting range and the temperature of the heating unit. A pulse control unit generates a PWM waveform based on the set pulse parameters and outputs the PWM waveform. A piezoelectric cooling unit performs piezoelectric cooling based on the PWM waveform.

Abstract: A vibration generating apparatus with high yield, low cost, and can exhibit vibration tactile haptic effects even with variation in the natural frequency of a mechanical vibrator, including a damping system having a damping ratio ?<1 to support a mechanical vibrator to a fastening part, and a magnetizing unit generating a dynamic magnetic field to vibrate the mechanical vibrator by non-contact, the mechanical vibrator generating a beat vibration by making the frequency of a drive voltage applied to the magnetizing unit, from a drive start or middle of drive, to be a non-resonant frequency out of a damped natural frequency of the mechanical vibrator, wherein the apparatus comprises a forced vibration control unit controlling to stop application of the drive voltage, in a beat wave defining an amplitude of the beat vibration, at a second valley part after a first peak part from the side of the drive start.

Abstract: A method for driving a piezoelectric transducer is provided. An input signal is received. At least one of a plurality of modes is selected for a buck-boost stage from a comparison of a desired voltage on a capacitor to a first threshold and a second threshold, where the desired voltage is determined from the input signal. The piezoelectric transducer is then driven substantially within the audio band using the desired voltage on the capacitor using an H-bridge that changes state with each zero-crossing.

Abstract: The present invention discloses a load driving circuit, comprising a voltage differential generation circuit and a common mode voltage generation circuit; wherein the voltage differential generation circuit is configured to generate a driving voltage for driving a load; and the common mode voltage generation circuit is configured to: when the voltage differential generation circuit generates the driving voltage for driving the load, regulate the voltages output by a first output terminal and a second output terminal of the voltage differential generation circuit to the same voltage value. The present invention also provides a load driving method and application devices thereof. With the technical solutions according to the present invention, a central value of a voltage output by the first output terminal and a voltage output by the second output terminal of the voltage differential generation circuit is effectively regulated.

Abstract: The disclosure relates to General Synchronized Vibration devices that provide haptic feedback to a user and improve the performance of existing vibratory devices. Different actuator types may be employed to provide synchronized vibration, including linear rotary actuators, rotating eccentric mass actuators including interleaved rotating mass actuators, and rocking mass actuators. A controller sends signals to one or more driver circuits to provide adjustment of vibration magnitude, frequency, and direction of the actuators. The system may apply forces onto an object, and a sensor measures a feature(s) of the object. This information is provided to a vibration device controller, which can then modify the vibration waveform to improve overall system performance. Fourier synthesis can be used to approximate arbitrarily shaped waveforms by controlling the phase and frequency of vibration actuators.