A vibrator is fitted to a human body for use. A variable filter extracts a signal of a predefined frequency range from an input music signal. A driving controller drives the vibrator based on the signal of the frequency range extracted by the variable filter. It is possible to adjust the frequency range that is predefined by using a user operation interface. The frequency range that is predefined may be determined by a frequency determination interface.

A transducer, a method of manufacturing a transducer, and a transducing device are provided. The transducer includes a receiving unit and a transmitting unit. The receiving unit includes a first receiving electrode, a first piezoelectric film, and a second receiving electrode which are sequentially stacked, and the receiving unit is configured to convert a first acoustic wave signal into an electrical signal by using a piezoelectric effect of the first piezoelectric film. The transmitting unit is configured to receive a control signal, which is based on the electrical signal, to transmit a second acoustic wave signal.

Disclosed are methods of obtaining zero vergence ultrasound waves for providing sonodynamic therapy with ultrasound waves that do not converge and do not diverge. The method includes coupling a sonodynamic therapy device with an array of flat piezoelectric transducers to a skin surface. A controller is configured to generate an electrical drive signal at a frequency, modulate the drive signal, and drive the transducer with the modulated drive signal at the frequency to produce a zero vergence ultrasound wave to produce an average acoustic intensity sufficient to activate a sonosensitizer in a treatment region without damaging healthy cells in the treatment region.

A tactile device includes: a substrate provided with a first surface; an organic piezoelectric film arranged on the first surface side; a plurality of electrodes arranged on the first surface; and a plurality of drive circuits arranged between the substrate and the organic piezoelectric film. The plurality of electrodes includes: a common electrode arranged across a plurality of cells; and a plurality of driving electrodes respectively arranged in the plurality of cells. The plurality of drive circuits includes: a first drive circuit capable of supplying a first driving signal; and a second drive circuit capable of supplying a second driving signal. The plurality of driving electrodes includes: a first driving electrode connected to the first drive circuit; and a second driving electrode connected to the second drive circuit. The first driving electrode and the second driving electrode are arranged in each of the plurality of cells.

The ultrasonic diagnostic apparatus includes: a transducer; a driving signal generation unit configured to generate a driving signal; and a transmission circuit configured to output a driving current corresponding to the driving signal, so as to drive the transducer, the transmission circuit includes: a transducer driving unit formed by a current mirror with a low voltage transistor and a high voltage transistor, the high voltage transistor being connected with the transducer, and a current source configured to supply an operation current corresponding to the driving signal to the low voltage transistor of the transducer driving unit, the driving signal generation unit includes: a transmission circuit driving unit replica that has a configuration same as that of the transducer driving unit, and a feedback control unit to detect a current flowing through a high voltage transistor of the transmission circuit driving unit replica, and to control the current to be constant.

A vibration device includes a protective cover, a first cylindrical body, a plate spring, a second cylindrical body, a piezoelectric element, and a vibrating plate. The vibration device further includes a non-equilibrium structure that removes a mass of a portion of or adds a mass to at least one of the protective cover, the first cylindrical body, the plate spring, the second cylindrical body, and the vibrating plate.

A display device can include a display panel including display pixels having light emitting elements, and sensing pixels including piezoelectric elements; and a driving circuit configured to drive the display panel, in which the display panel further includes a substrate; a thin film transistor array disposed on the substrate, the thin film transistor array including display driving transistors included in the display pixels; a sensor array disposed on the thin film transistor array, the sensor array including sensor driving transistors included in the sensing pixels; a piezoelectric element layer disposed on the sensor array, the piezoelectric element layer including the piezoelectric elements connected to the sensor driving transistors; and a light emitting element layer disposed on the piezoelectric element layer, the light emitting element layer including the light emitting elements, and anode electrodes of the light emitting elements are connected to the display driving transistors.

An ultrasonic element includes a substrate in which an opening is formed, a vibrating plate provided at the substrate, the vibrating plate including a first surface in contact with the substrate, the vibrating plate blocking the opening, a piezoelectric element provided at a second surface on an opposite side from the first surface of the vibrating plate, a protective substrate facing the second surface and protecting the piezoelectric element, and a suppressing unit provided between the protective substrate and the vibrating plate, the suppressing unit being configured to suppress a vibration of the vibrating plate, in which in the piezoelectric element, a first electrode, a piezoelectric layer, and a second electrode are stacked in this order from the second surface, and an active part is a part of the vibrating plate where the first electrode, the piezoelectric layer, and the second electrode overlap, the suppressing unit is provided around the active part, and a slit is formed in the suppressing unit, in plan view from a stacking direction.

An ultrasonic sensor includes a transmission unit that is disposed on a first axis which is inclined with respect to a normal line of a surface of an object, a reception unit that is provided on a side opposite to the transmission unit of the object, on the first axis, and a transmission control unit that controls drive of the transmission unit. The transmission unit includes a plurality of transmission elements that transmit ultrasonic waves, and the plurality of transmission elements are arranged in a first direction that intersects the first axis in a plane including the normal line and the first axis. The transmission control unit delay-drives the plurality of transmission elements to align a direction of the ultrasonic wave that is transmitted from the transmission unit with the first axis.

A system may include haptic output devices such as ultrasonic haptic output components that generate ultrasonic sound waves. The ultrasonic sound waves may be directed towards a user to provide haptic output. The haptic output devices may be used in a system that includes one or more electronic devices. Control circuitry may control the haptic output devices based on sensor data indicating where the user is located and/or based on what is being displayed for a user on a display. Ultrasonic haptic output may be used to simulate contact with a virtual object, to simulate rain, to simulate a breeze, and/or to simulate other sensations in a mixed reality or virtual reality environment. The ultrasonic haptic output components may be stand-alone devices or may be mounted in a head-mounted display, a gaming base station, a handheld controller, a finger-mounted device, or other electronic equipment.