A display device includes a display panel having first, second, and third areas; at least three sound generating actuators including first, second, and third actuators each spaced apart from the other two in a long axis direction of the display panel, wherein the first, second, and third actuators each contact the display panel at the first, second, and third areas, respectively, to generate sound by vibrating the display panel; and a support structure at a rear side of the display panel configured to support the at least three sound generating actuators.

Embodiments relate to a diaphragm having high rigidity and high internal loss. The diaphragm may comprise: a matrix-shaped structure including a plurality of through-holes; and a graphene layer disposed in at least a part of the plurality of through-holes and coupled to the structure.

Disclosed is a speaker which improves acoustic performances and includes a frame, a vibration system, a magnetic circuit system, a front cover, a sealing diaphragm, and a sound outlet. The vibration system includes an upper diaphragm, a lower diaphragm in an annular shape, a skeleton including an annular enclosure wall, and a voice coil. The magnetic circuit system includes a bottom plate, a first magnetic unit, and a second magnetic unit. The upper diaphragm includes an inner suspension fixed to the first magnetic unit, an outer suspension fixed to the frame, and a dome. The upper diaphragm and the front cover form a first front cavity. The annular enclosure wall, the sealing diaphragm, the lower diaphragm and the frame form a second front cavity. Both the first front cavity and the second front cavity communicate with the sound outlet.

Disclosed is a display device that includes a display panel, sound generating actuators including a first sound generating actuator in a first area of the display panel and a second sound generating actuator in a second area of the display panel, the first and second sound generating actuators configured to vibrate the display panel to generate sound, and a partition between the first sound generating actuator and the second sound generating actuator.

The embodiments of the present disclosure provide an open earphone. At least one dimension of the open earphone in a wearing state is different from the at least one dimension of the open earphone in a non-wearing state.

Low-cost, robust, and high performance microelectromechanical systems (MEMS) acoustic sensors are described. Described MEMS acoustic sensors can comprise a set of etch release structures in the acoustic sensor membrane that facilitates rapid and/or uniform etch release of the acoustic sensor membrane. In addition, MEMS acoustic sensors can comprise a set of membrane position control structures of the acoustic sensor membrane that can reduce the bending stress of the acoustic sensor membrane. MEMS acoustic sensors can further comprise a three layer acoustic sensor membrane that provides increased robustness. Further design flexibility and improvements are described that provide increased robustness and/or cost savings, and a low cost fabrication process for MEMS acoustic sensors is provided.

One embodiment provides an acoustic transducer including a diaphragm connected to an upper portion. A first voice coil is connected to a first side of the diaphragm. A second voice coil is connected to a second side of the diaphragm. A first magnetic motor assembly is connected to a first side of a lower portion. A second magnetic motor assembly is connected to a second side of the lower portion. An electronics system is connected to the lower portion and disposed behind the diaphragm and between the first magnetic motor assembly and the second motor assembly. The first voice coil is at least partially disposed within a gap of the first magnetic motor assembly, and the second voice coil is at least partially disposed within a gap of the second magnetic motor assembly.

The present disclosure discloses a silica gel vibrating diaphragm and a method for fabricating the same. The method comprises: forming a composite material belt by using two layers of a base material and liquid silica gel in a calendering manner, wherein the liquid silica gel is between the two layers of the base material; wholly hot-press molding the composite material belt by a vibrating diaphragm die holder, a temperature of the hot-press molding being higher than a vulcanization temperature of the liquid silica gel; removing the two layers of the base material to obtain a whole sheet of silica gel vibrating diaphragm; and blanking the whole sheet of silica gel vibrating diaphragm that has been removed of the two layers of the base material to fabricate a required silica gel vibrating diaphragm. As compared with conventional solutions, the technical solution of the present disclosure has the advantages of simple molding manner, low cost, various styles of the vibrating diaphragm, and small thickness of the vibrating diaphragm.

A display device includes a display panel; a support structure at a rear of the display panel; a sound generation actuator supported by the support structure and configured to vibrate the display panel to generate sound; and a cap member surrounding the sound generation actuator and secured to the support structure at an area of the support structure, the area being near the sound generation actuator.

An apparatus comprising a piezoelectric diaphragm positioned between opposing first and second electrodes, the piezoelectric diaphragm comprising a stack of graphene oxide layers between respective electrode-engaging layers of reduced graphene oxide, wherein the apparatus is configured to have one or more of a sound output mode and a sound input mode such that: in the sound output mode, the first and second electrodes are configured to apply a voltage to the reduced graphene oxide layers to generate an electric field across the graphene oxide stack, the generated electric field causing vibration of the piezoelectric diaphragm to produce a sound output wave corresponding to the applied voltage, and in the sound input mode, the reduced graphene oxide layers are configured to collect electrical charge which is induced in the graphene oxide layers by vibration of the piezoelectric diaphragm in response to a sound input wave, the collected electrical charge creating a voltage between the first and second electrodes corresponding to the sound input wave.