Provided is a voice sensor comprising a piezoelectric material layer includes a substrate, a support layer, a metal layer, a piezoelectric material layer on the metal layer and an electrode on the piezoelectric material layer, and the substrate integrally supports a device layer of the voice sensor by exposing a part of a thin film including the piezoelectric material layer, the electrode and a polymer layer.

A display apparatus includes a display unit including a display panel configured to display an image, a curvature variation unit disposed on a rear surface of the display unit and varying a curvature of the display unit, and a vibration unit disposed on the rear surface of the display unit configured to vibrate the display panel.

Electrodynamic drive for a flat loudspeaker having an enclosure where the following components are installed: a magnetic system, a cylindrical coil fixed to the frame, a sound-emitting membrane attached to the cylindrical coil former, a system holding the coil within a magnetic gap, and flexible wires for supplying an electrical signal to the coil. While the magnetic system is made as a cylindrical permanent magnet, a ferrite ring with the above mentioned cylindrical magnet and washers, joining them into a single structure.

The present disclosure relates to a display apparatus, especially having a display panel generating sounds. A display apparatus according to the present disclosure includes: a display module; a back cover at a rear surface of the display module; a depression recessed into the back cover from a first surface of the back cover with a first width and a first depth; a penetration through from a second surface of the back cover to the depression with a second width smaller than the first width and a second depth corresponding to a difference between a thickness of the back cover and the first depth; and a first piezo vibration unit disposed at a stepped portion between the penetration and the depression.

A display device includes a display panel including a display layer including light-emitting elements disposed on a substrate, and a sensor electrode layer disposed on the display layer. The sensor electrode layer includes a first sound electrode and a second sound electrode; a vibration layer electrically contacting the first sound electrode and the second sound electrode and being deformed in response to a first sound driving voltage applied to the first sound electrode and a second sound driving voltage applied to the second sound electrode; and sensor electrodes disposed on the vibration layer. The sensor electrodes sense an input.

Disclosed herein are speaker assemblies and acoustic devices comprising a panel having a long side and a short side, at least one transducer configured to excite the panel at a plurality of excitation locations on the panel to generate a wave having a wave front substantially perpendicular to the long side and propagating toward the short side of the panel and, optionally, at least one attenuating component mounted to the panel. Methods for generating an acoustic sound are also disclosed herein.

The present disclosure relates to a flexible vibration film and a display apparatus having the same. A flexible vibration film includes: a vibration layer; a first electrode layer disposed on a bottom surface of the vibration layer; and a second electrode layer disposed on a top surface of the vibration layer, wherein the vibration layer includes: a first vibration unit having a first vibration characteristics; a second vibration unit having a second vibration characteristics; and a flexible insulating part disposed between the first vibration unit and the second vibration unit, and wherein the first electrode layer includes: a first part corresponding to the first vibration unit; and a second part corresponding to the second vibration unit.

According to one of aspects, provided is an electronic device including a panel 10, a piezoelectric element 30 attached to the panel 10, and a substrate 25 attached to a main surface of the piezoelectric element 30. The panel 10 is configured to be deformed due to deformation of the piezoelectric element 30, and sound is transmitted to an object that is in contact with the deformed panel 10. The substrate 25 includes a base 25a made of resin, and signal lines 25b and 25c laminated with the base 25a and connected to the main surface of the piezoelectric element 30. The substantially the entire main surface of the piezoelectric element 30 is covered by the base 25a.

Provided is a voice sensor comprising a piezoelectric material layer includes a substrate, a support layer, a metal layer, a piezoelectric material layer on the metal layer and an electrode on the piezoelectric material layer, and the substrate integrally supports a device layer of the voice sensor by exposing a part of a thin film including the piezoelectric material layer, the electrode and a polymer layer.

The present invention is intended to provide a sound generating actuator which can facilitate heat dissipation from a voice coil. According to the present invention, there is provided a sound generating actuator, including: a frame; a stationary part mounted on the frame and provided with a yoke, a magnet and a top plate to compose a magnetic circuit; a voice coil configured to receive an electrical signal and vibrate due to a magnetic field and mutual electromagnetic force of the stationary part; a spring configured to dampen vibration of the voice coil and that is made of a metallic material and secured to the frame; and a contact pad that is attached to the spring and configured to transfer vibration of the voice coil.