A display panel and an electronic device are provided. The display panel may include a display layer, a protective layer and a support layer. The display layer may be arranged between the protective layer and the support layer. The support layer may be coupled to the display layer and may include a piezoelectric film layer. The piezoelectric film layer may drive the display layer and the protective layer to vibrate in response to determining that the piezoelectric film layer is deformed.

A haptic device comprising a base and at least one shaker branch. Said at least one branch is connected to the base by mobility means conferring a degree of freedom on the branch to move in rotation about a pivot axis relative to the base. An exciter member comprises electrical exciter means configured to cause said at least one branch to shake by moving in rotation about the pivot axis from a rest position to an activated position, and resilient return means tending to maintain each branch in the corresponding rest position.

There is provided a vibration generating apparatus including: a housing having an internal space; a vibration member having both end portions thereof fixed to the housing; and a piezoelectric element installed on the vibration member, wherein the vibration member includes a first member having the piezoelectric element installed thereon and second members disposed at both end portions of the first member, the second members being formed of a material having a higher degree of tensile strength than the first member.

An electronic device (1) includes a touch panel display (2), a speaker (3), and a piezo actuator (4). The speaker (3) outputs a sound based on a first sound signal corresponding to a range of a prescribed frequency or more. The piezo actuator (4) is provided on the touch panel display (2), and is deformed in response to at least one of a second sound signal corresponding to a range of less than the prescribed frequency and a control signal for haptics feedback based on a predetermined vibration pattern to vibrate the touch panel display (2).

An ultrasonic transducer and an ultrasonic probe including the same are provided. The ultrasonic transducer includes a piezoelectric layer configured to convert an electric signal and an ultrasound into each other, and a dematching layer having a uniform thickness, the dematching layer being arranged on a partial region of the piezoelectric layer and configured to reflect the second ultrasound wave that is incident on the dematching layer.

Provided is a method for bonding wafers, which can bond the wafers to each other with high reliability while reducing the influence on the wafers. The method for bonding wafers includes the steps of: preparing a first wafer that has, on the surface thereof, a first metal layer with a first rigidity modulus, and a second wafer that has, on the surface thereof, a second metal layer with a second rigidity modulus higher than the first rigidity modulus; removing an oxide film at the surface of the second metal layer while an oxide film at the surface of the first metal layer is not removed; and bonding the surface of the first wafer to the surface of the second wafer.

A device includes a pair of substrate layer corresponding to a carrier substrate, an intermediary layer disposed on the pair of substrate layers, a cavity region disposed between the pair of substrate layers underneath the intermediary layer, a piezoelectric layer including a lithium-based film disposed on the intermediary layer, and a plurality of interdigital transducer electrodes disposed on the piezoelectric layer. The plurality of interdigital transducer electrodes includes an outer signal electrode, an inner signal electrode, an outer ground electrode and an inner ground electrode.

A method is provided for measuring a flow rate of a fluid. The method incudes emitting a periodic signal from a first ultrasonic transductor, where the periodic signal is emitted by the piezoelectric wafer and passes through a liquid media. Unwanted reflections of the periodic signal are delayed so that the first periods of the periodic signal are representatives of the passage measurement. The first periods of the periodic signal are received at a second ultrasonic transductor having a piezoelectric wafer that receives the periodic signal. The flow rate of the fluid is determined by using the first periods of the periodic signal.

In a vibration unit, a piezoelectric element enters an internal space of a through hole; and thereby, a second case member can be arranged proximate to a first case member. Therefore, a thickness of the vibration unit can be reduced, namely, a height of the vibration unit can be reduced. As described above, since the thickness of the vibration unit is reduced, a size of the vibration unit can be reduced.

A vibration device that includes a flat plate that has a first main surface and a second main surface; a vibrator that is configured to vibrate along a first direction parallel to the first main surface; a connecting member that connects the vibrator to the first main surface of the flat plate; a support member having a cavity or a recess in a portion thereof facing the vibrator; and a cushioning material connecting the first main surface of the flat plate to the support member, the cushioning material being disposed so as to not overlap with the vibrator in a plan view of the vibration device. A combined length of the vibrator and the connecting member in a second direction perpendicular to the first main surface of the flat plate is larger than a length of the cushioning material in the second direction.