An acoustic transducer, in particular for an ultrasonic sensor, is proposed. The acoustic transducer has a functional group, the functional group encompassing a diaphragm cup and at least one electroacoustic transducer element. The acoustic transducer furthermore has a housing. The diaphragm cup encompasses a vibration-capable diaphragm and an encircling wall, as well as at least one electroacoustic transducer element, the transducer element being embodied to excite the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is constituted from a plastic material, the at least one transducer element being integrated into the vibration-capable diaphragm, the transducer element having an electrically active polymer.

A transducer is disclosed which includes lead zirconate titanate (PZT) particles mixed with graphene nanoplatelets (GNPs) in a flexible substrate aligned in a first direction, forming a transducer subsystem, a first conductive protective electrode having a width and a length providing an electrical connectivity to an external circuit, a second conductive protective electrode having the width and the length providing an electrical connectivity to the external circuit, wherein the transducer subsystem is sandwiched between the first and second conductive protective electrodes.

An electronic device including a display panel, a protection layer, and a sound broadcasting element is provided. The display panel is disposed on an inner surface of the protection layer. The sound broadcasting element is disposed on the inner surface of the protection layer and includes a piezoelectric component and a connection component. The connection component is located on a side of the display panel, the connection component contacts the protection layer and is connected between the piezoelectric component and the protection layer. A back surface of the display panel is located between the piezoelectric component and the protection layer, wherein the back surface of the display panel is a surface away from the protection layer.

A flexible vibration module is disclosed. The flexible vibration module includes a piezoelectric composite layer, including: a plurality of piezoelectric portions each having a piezoelectric characteristic, where at least two of the plurality of piezoelectric portions have different sizes; and a flexible portion between the plurality of piezoelectric portions.

A method for manufacturing a MEMS sound transducer for generating and/or detecting sound waves in the audible wavelength range and/or in the ultrasonic range, includes arranging at least one piezoelectric element on a support substrate. A diaphragm is formed on the at least one piezoelectric element. In forming the diaphragm, a flowable and curable polymer, which forms the diaphragm after curing, is at least partially cast around the at least one piezoelectric element. The invention further relates to the MEMS sound transducer formed by the method.

An object of the present invention is to provide a piezoelectric element capable of improving the sound pressure particularly in a high frequency band by decreasing the impedance in a case of being used as an electroacoustic transducer or the like, and a piezoelectric speaker formed of a piezoelectric film. The object can be achieved by using a piezoelectric film in which a piezoelectric layer containing piezoelectric particles in a polymer matrix is sandwiched between electrode layers, a planar shape is a polygon, the piezoelectric film has a protruding portion protruding from a side of a polygon other that a shortest side, and the protruding portion is provided with connecting portions for connecting an external power supply and an electrode layer or identical connecting portions are provided in the vicinity of end portions on a side other than the shortest side.

Provided is a vibration panel including an inner member, a first outer member, a second outer member, a piezoelectric actuator, an actuator bonding layer, and a filler. The inner member includes first and second main surfaces. The first outer member includes third and fourth main surfaces, the third main surface including a first region and a second region. The second outer member includes fifth and sixth main surfaces, the fifth main surface including a third region and a fourth region. The piezoelectric actuator causes vibration. The actuator bonding layer is disposed between the piezoelectric actuator and the second region and bonds the piezoelectric actuator to the second region. The filler fills a space between the second region and the fourth region and covers the piezoelectric actuator.

A vibration apparatus may include a vibration generator including a piezoelectric material and a sensor portion configured at the vibration generator, and thus, may correct or compensate for an electrical characteristic change of the vibration generator and may correct or compensate for a vibration characteristic of the vibration generator. An apparatus including the vibration apparatus is also disclosed.

A device, a method, and a non-transitory storage medium are described in which a transducer validation service is provided. The service may include stimulating a piezoelectric transducer. The service may include measuring a signal output, which is responsive to the stimulus, from the piezoelectric transducer. The service may include evaluating the measured signal output to a reference voltage and determining whether the piezoelectric transducer is reverse-poled or not based on the evaluation. The service may further include determining a response to the determination when the piezoelectric transducer is reverse-poled.

A display device including a display panel configured to display an image; a touch sensing device configured to sense a touch of an object; a sound driver configured to generate and transmit a first sound driving signal and a second sound driving signal according to first sound data and second sound data; and a sound generator configured to generate a sound according to the first and second sound driving signals, such that a sound pressure level in a first frequency range is between first and second sound pressure levels in a first operating mode and a second operating mode, wherein the display device is in the first operating mode in response to the touch sensing device not sensing the touch of the object, and the display device is in the second operating mode in response to the touch sensing device sensing the touch of the object.