An audio device includes a thin film material having a capacitive property, the thin film material including an acoustic sheet having a curved shape, in which the acoustic sheet includes a first region that is actively driven by an input signal and a second region that is not actively driven by the input signal and the first region is formed in at least a part of an outside of the second region.

The acoustic fiber transducer has a piezoelectric domain with Young's modulus, E.sub.piezo, and including a non-centrosymmetric crystalline-phase piezoelectric material and inorganic piezoelectric particles. At least one charge collector domain is in electrical connection with the piezoelectric domain and includes an electrically conductive material operative to collect electrical charge generated in the piezoelectric domain. At least one electrical conductor is in electrical contact with the at least one charge collector domain and includes an electrically conductive material operative to transport electrical charge from a charge collector domain to an end of the acoustic fiber transducer as an electrical signal indicative of input acoustic sound pressure on a matrix of textile fibers that includes the acoustic fiber transducer. Outer acoustic energy transmission material has a Young's modulus E.sub.trans, of 0.3 Pa-500 MPa, for matching vibrational modes of the textile fiber matrix. A ratio of E.sub.piezo/E.sub.trans is between about 5 and about 70,000.

The embodiment of the present disclosure may disclose an acoustic device. The acoustic device may comprise a piezoelectric component, an electrode, and a vibration component. The piezoelectric component may generate vibration under an action of a driving voltage, the electrode may provide the driving voltage for the piezoelectric component, and the vibration component may be physically connected to the piezoelectric component to receive the vibration and generate sound. The piezoelectric component may include a substrate and a piezoelectric layer, the piezoelectric layer may be covered on a surface of the substrate, the electrode may be covered on a surface of the piezoelectric layer, and the coverage area of the electrode on the surface of the piezoelectric layer may be less than an area of the surface of the substrate covered with the piezoelectric layer. In the present disclosure, the modal actuator of the piezoelectric component may be formed through the electrode designing, so that the piezoelectric component may output a specific modal shape, and improves the acoustic characteristics of the acoustic device. Compared with the modal control system composed of different mechanical structures added in a specific region, the present disclosure realizes the modal control of the piezoelectric component through the electrode design, which may simplify the structure of the acoustic device.

An audio system comprises an array of transparent piezoelectric transducers on a transparent surface. Each transparent piezoelectric transducer includes one or more piezoelectric layers and one or more conductive layers that are substantially transparent to visible light. A transparent piezoelectric transducer may include, e.g., a first conductive layer, a first piezoelectric layer on the first conductive layer, and a second conductive layer on the first piezoelectric layer. Or in another example, the transparent piezoelectric transducer includes many (e.g., 20-30) piezoelectric layers and many (e.g., 20-30) conductive layers.

Embodiments of the present disclosure provide an acoustic output device comprising: a vibration element having a beam structure extending along a length direction of the vibration element; a piezoelectric element configured to deform in response to an electrical signal, the deformation of the piezoelectric element driving the vibration element to vibrate, wherein the piezoelectric element is attached to a first position of the beam structure, and a size of an attachment area along the length direction does not exceed 80% of a size of the beam structure along the length direction; and a mass element connected to a second position of the beam structure, wherein the first position and the second position are spaced apart along the length direction, and the vibration of the vibration element drives the mass element to vibrate in a direction perpendicular to the length direction.

The present technology relates to an audio device and a driving method thereof, and a display device which are configured to make it possible to obtain sufficient sound pressure level in a wider frequency band.

The audio device includes: a diaphragm; an electrodynamic vibrator that vibrates the diaphragm to output sound; and a piezoelectric vibrator that vibrates the diaphragm to output sound. The present technology can be applied to the display device.

An audio system comprises an array of transparent piezoelectric transducers on a transparent surface. Each transparent piezoelectric transducer includes one or more piezoelectric layers and one or more conductive layers that are substantially transparent to visible light. A transparent piezoelectric transducer may include, e.g., a first conductive layer, a first piezoelectric layer on the first conductive layer, and a second conductive layer on the first piezoelectric layer. Or in another example, the transparent piezoelectric transducer includes many (e.g., 20-30) piezoelectric layers and many (e.g., 20-30) conductive layers.

An audio system comprises an array of transparent piezoelectric transducers on a transparent surface. Each transparent piezoelectric transducer includes one or more piezoelectric layers and one or more conductive layers that are substantially transparent to visible light. A transparent piezoelectric transducer may include, e.g., a first conductive layer, a first piezoelectric layer on the first conductive layer, and a second conductive layer on the first piezoelectric layer. Or in another example, the transparent piezoelectric transducer includes many (e.g., 20-30) piezoelectric layers and many (e.g., 20-30) conductive layers.

The present disclosure relates to a vibration generation device, a display apparatus including the vibration generation device, and a vehicle including the vibration generation device. A vibration generation device includes a piezoelectric ceramic part having a certain interval, a piezoelectric material layer between the piezoelectric ceramic parts, and an electrode part configured to provide electric field to one or more of the piezoelectric ceramic part and the piezoelectric material layer.

The present disclosure relates to a vibration generation device, a display apparatus including the vibration generation device, and a vehicle including the vibration generation device. A vibration generation device includes a piezoelectric ceramic part having a certain interval, a piezoelectric material layer between the piezoelectric ceramic parts, and an electrode part configured to provide electric field to one or more of the piezoelectric ceramic part and the piezoelectric material layer.