An organic light emitting device includes: a substrate; a first electrode provided on the substrate; a metal pattern provided along an edge of the first electrode; and a pixel definer provided on the metal pattern. The pixel definer covers an end portion of the first electrode and an end portion of the metal pattern. The pixel definer includes an opening exposing the first electrode.

A headphone earcup comprising: a frame defining an acoustic cavity that is acoustically coupled to a driver; an earcup cushion coupled to the frame and surrounding the acoustic cavity; and an adsorbent member acoustically coupled to the acoustic cavity to cause an acoustic enlargement of the acoustic cavity.

Aspects are disclosed of a filler for occupying a volume. The filler includes an expandable filler positioned in the volume so that it occupies a percentage of the volume. The expandable filler can permanently expand from a first dimension to a second dimension upon the application of an expansion trigger. The filler also includes an acoustic filler made up of a plurality of acoustically active beads positioned with the expandable filler in the volume so that the acoustic filler can adsorb gas flowing into the volume. Other embodiments are disclosed and claimed.

The present embodiment relates to a double-faced display device generating sound by directly vibrating a display panel and includes: a first display panel and a second display panel disposed at the front and rear surface thereof, respectively; a single sound generating actuator connected to the first display panel and the second display panel to simultaneously vibrate the first display panel and the second display panel and thus generate sound; and a support part configured to support the sound generating actuator, the first display panel, and the second display panel. The present embodiment does not require a separate speaker and thus can achieve a thin or slim display device, and can improve the localization or the quality of sound output in opposite directions in the double-faced display device.

Loudspeakers are described that may reduce comb filtering effects perceived by a listener by either 1) moving transducers closer to a sound reflective surface (e.g., a baseplate, a tabletop or a floor) through vertical (height) or rotational adjustments of the transducers or 2) guiding sound produced by the transducers to be released into the listening area proximate to the reflective surface through the use of horns and openings that are at a prescribed distance from the reflective surface. The reduction of this distance between the reflective surface and the point at which sound emitted by the transducers is released into the listening area may lead to shorter reflected path that reduces comb filtering effects caused by reflected sounds that are delayed relative to the direct sound. Accordingly, the loudspeakers shown and described may be placed on reflective surfaces without severe audio coloration caused by reflected sounds.

There is provided a sound system comprising: a first reflector arranged overhead and to reflect sound into a listening environment, a sound emitting device comprising a sound source and a second reflector, the sound source being configured to direct a sound beam with a first beam angle into the second reflector, the sound emitting device being any of a horn or parabolic loudspeaker. The second reflector is shaped to reflect the sound beam with a second beam angle towards the first reflector, and the first reflector is shaped such as it reflects the sound beam back to the listening environment with a third beam angle. The second beam angle is less than the first beam angle, and the third beam angle is greater than the second beam angle. There is further provided a sound system wherein three of more reflectors are used to reflect sound back down to the listening environment. Additionally, at least one sound absorbing device of a three dimensional shape is positioned in between the overhead reflectors.

A damper and a speaker apparatus includes the damper, which suppresses damage to an oscillatory system from an excessive input signal, enabling an efficiency increase of the speaker apparatus. As a damper has a planar surface, undue deformation of the oscillatory system due to an excessive input signal is suppressed, and damage to the oscillatory system can be suppressed. Furthermore, since the deformation of a corrugation portion by a normal input signal is hardly prevented, a reduction in sound pressure of the speaker apparatus with respect to an input signal is suppressed, enabling an increase in efficiency. Furthermore, the planar surface is extended at a height in a thickness direction different from that of an attachment portion. Thus, rising portions are deformed when a voice coil bobbin is oscillated, enabling suppression of rupture of the damper in the vicinity of a boundary between the planar surface and the attachment portion.

The present disclosure discloses a speaker module, comprising a module housing and a speaker unit disposed in the module housing, wherein the speaker unit divides a cavity enclosed by the module housing into a front acoustic cavity and a rear acoustic cavity, the module housing is further provided with an air-permeable insulation assembly which divides the rear acoustic cavity into a first chamber and a second chamber, and the second chamber is filled with a sound-absorbing material, and wherein the air-permeable insulation assembly comprises a support frame and a mesh cloth adhered and fixed to the support frame by means of a back adhesive. The present disclosure can be used to prevent the problems of mesh breakage and mesh deviation that are likely to occur when the mesh cloth is being installed at the air-permeable insulation assembly, thereby improving the production yield of the air-permeable insulation assembly.

A speaker comprises a housing, a transducer residing inside the housing, and at least one sound guiding hole located on the housing. The transducer generates vibrations. The vibrations produce a sound wave inside the housing and cause a leaked sound wave spreading outside the housing from a portion of the housing. The at least one sound guiding hole guides the sound wave inside the housing through the at least one sound guiding hole to an outside of the housing. The guided sound wave interferes with the leaked sound wave in a target region. The interference at a specific frequency relates to a distance between the at least one sound guiding hole and the portion of the housing.

The present disclosure relates to a display apparatus, and more particularly, to a display apparatus having a display panel capable of generating sound. A display apparatus according to the present disclosure includes: a display module; a guide panel disposed at circumferences of a rear surface of the display module; a back cover attached to the guide panel; a sound generating unit disposed between the display module and the back cover; and an adhesive fixing element and a vibration absorber disposed between the guide panel and the rear surface of the display module, wherein the adhesive fixing element fasten the guide panel to the rear surface of the display module, and wherein the vibration absorber is disposed at the guide panel as facing to inner portions of the display module.