A display apparatus includes: a display panel configured to display an image, and at least one vibration module on a rear surface of the display panel, the at least one vibration module including a piezoelectric composite layer including a plurality of sub-modules configured to vibrate the display panel, each of the plurality of sub-modules including: a plurality of first portions including a piezoelectric characteristic, and a plurality of second portions having flexibility, each of the plurality of second portions being between a respective pair of the plurality first portions, wherein the plurality of first portions in the respective sub-modules are arranged in a same direction or are partially arranged in different directions.

Provided is an apparatus including an ultrasonic generator including a transducer having a piezoelectric body that vibrates due to a piezoelectric effect and generates ultrasonic waves when an alternating voltage is applied, and three or more electrodes provided in different regions on a surface of the piezoelectric body. The apparatus includes a control unit that, when the control unit receives an ultrasonic wave generation instruction including information on a directivity of ultrasonic waves to be generated, selects from the three or more electrodes a combination of a voltage application electrode and a ground electrode corresponding to the directivity in the ultrasonic wave generation instruction and applies the alternating voltage to the voltage application electrode to generate ultrasonic waves, the voltage application electrode being an electrode to which the alternating voltage is to be applied, and the ground electrode being an electrode to be at a ground potential.

A piezoelectric pump, for causing the flow of a liquid, including a piezoelectric member driven by applying a voltage, a diaphragm which is deformed by the driving of the piezoelectric member, an adhesive member which bonds the piezoelectric member and the diaphragm together, and an urging member that urges the piezoelectric member toward the diaphragm.

A piezoelectric vibrator has a first frequency region where the phase difference between a pickup signal representing the vibration of the piezoelectric vibrator and a drive signal that drives the piezoelectric vibrator does not monotonously change in accordance with the frequency of the drive signal and a second frequency region where the phase difference monotonously changes in accordance with the frequency of the drive signal. A method for controlling a piezoelectric driving apparatus including the piezoelectric vibrator controls the frequency of the drive signal in such a way that pickup voltage representing the amplitude of the pickup signal is fixed in the first frequency region and controls the frequency of the drive signal in such a way the pickup voltage is fixed with the phase difference maintained smaller than or equal to a prespecified value in the second frequency region.

A semiconductor module and a method for manufacturing the same are provided. The semiconductor module includes a substrate comprising a front side and at least one semiconductor device formed on the front side, a shielding structure formed on the at least one semiconductor device, and a piezoelectric layer formed on the shielding structure.

A semiconductor module and a method for manufacturing the same are provided. The semiconductor module includes a substrate comprising a front side and at least one semiconductor device formed on the front side, a shielding structure formed on the at least one semiconductor device, and a piezoelectric layer formed on the shielding structure.

The disclosed technology generally relates to quartz crystal devices and more particularly to quartz crystal devices configured to vibrate in torsional mode. In one aspect, a quartz crystal device configured for temperature sensing comprises a fork-shaped quartz crystal comprising a pair of elongate tines laterally extending from a base region in a horizontal lengthwise direction of the fork-shaped quartz crystal. Each of the tines has formed on one or both of opposing sides thereof a vertically protruding line structure laterally elongated in the horizontal lengthwise direction. The quartz crystal device further comprises a first electrode and a second electrode formed on the one or both of the opposing sides of each of the tines and configured such that, when an electrical bias is applied between the first and second electrodes, the fork-shaped quartz crystal vibrates in a torsional mode in which each of the tines twists about a respective axis extending in the horizontal lengthwise direction.

To provide a driving device including a piezoelectric element deterioration detection circuit and a deterioration detection method that enable detection of deterioration of the piezoelectric element used in the driving device, without stopping a normal operation of the driving device. The driving device 1 includes a piezoelectric element 2, a power supply unit 3, a first resistor 11, a second resistor 12, a measuring unit and a control unit, wherein resistance values of the first resistor and the second resistor are smaller than an insulating resistance value of the piezoelectric element, the measuring unit measures, a voltage across the first resistor (voltage between a first terminal 13 and a second terminal 14), in a state of supplying a predetermined voltage from the power supply unit, and the control unit 3 calculates a resistance value of the piezoelectric element from a voltage value obtained by the measurement of the measuring unit, and determines, whether or not degradation has occurred in the piezoelectric element based on the calculated resistance value.

Electronic circuit assemblies are provided, with an electronic circuit assembly including a transducer circuit to generate electrical energy based on applied pressure, and a static-electricity capture circuit to capture electrical energy from static-electrical charge. Further, the electronic circuit assembly includes a power management circuit electrically coupled to the transducer circuit and the static-electricity capture circuit to receive, at least in part, the generated electrical energy based on applied pressure at the transducer circuit and the electrical energy from static-electrical charge captured by the static-electricity capture circuit.

A microfluidic substrate and a manufacture method thereof, and a microfluidic panel are provided. The microfluidic substrate includes a base substrate, an acoustic wave generation device, and a first switching circuit. The acoustic wave generation device is on the base substrate and configured to emit an acoustic wave to drive a liquid droplet to move over the microfluidic substrates, the acoustic wave generation devices includes an acoustic wave driving electrode and an acoustic wave generation layer, the first switching circuit is on the base substrate, and the first switching circuit is electrically connected to the acoustic wave driving electrode and is configured to transmit an acoustic wave driving signal to the acoustic wave driving electrode, and the acoustic wave driving electrode is configured to drive the acoustic wave generation layer to generate the acoustic wave under control of the acoustic wave driving signal.