An audio-visual system may include a housing comprising an open upper end and a storage space, an audio-visual device installed inside the housing and exposable through the open upper end, and a lifting device configured to expose or store the audio-visual device inside the housing through the open upper end. The audio-visual device may include a display, a speaker, and a processor configured to control the audio-visual system to operate in a first mode for outputting media art content while the display is stored in the housing according to a first event, operate in a second mode for outputting audio content through the speaker while part of the display is exposed through the open upper end according to a second event, and operate in a third mode for outputting a visual content while the entire display is exposed through the open upper end according to a third event.

An audio-visual system may include a housing comprising an open upper end and a storage space, an audio-visual device installed inside the housing and exposable through the open upper end, and a lifting device configured to expose or store the audio-visual device inside the housing through the open upper end. The audio-visual device may include a display, a speaker, and a processor configured to control the audio-visual system to operate in a first mode for outputting media art content while the display is stored in the housing according to a first event, operate in a second mode for outputting audio content through the speaker while part of the display is exposed through the open upper end according to a second event, and operate in a third mode for outputting a visual content while the entire display is exposed through the open upper end according to a third event.

An audio-visual system may include a housing comprising an open upper end and a storage space, an audio-visual device installed inside the housing and exposable through the open upper end, and a lifting device configured to expose or store the audio-visual device inside the housing through the open upper end. The audio-visual device may include a display, a speaker, and a processor configured to control the audio-visual system to operate in a first mode for outputting media art content while the display is stored in the housing according to a first event, operate in a second mode for outputting audio content through the speaker while part of the display is exposed through the open upper end according to a second event, and operate in a third mode for outputting a visual content while the entire display is exposed through the open upper end according to a third event.

Provided is a display device or a display system capable of displaying images along a curved surface, a display device or a display system capable of displaying images seamlessly in the form of a ring, or a display device or a display system that is suitable for increasing in size. The display device includes a display panel. The display panel includes a first part and a second part and is flexible. The first part can display images. The second part can transmit visible light. The display panel is curved so that the second part and the first part overlap with each other.

An HMD includes a mounting band for surrounding a head H of a user. The mounting band includes a case, a stretching unit, an adjustment mechanism that adjusts a length of the stretching unit to be accommodated in the case by relatively moving the stretching portion with respect to the case, a winding target member, and a spring member which is fixed at a front portion thereof to the stretching unit and at a rear portion thereof wound on the winding target member and in which an unwinding amount from the winding target member changes according to the length of the stretching unit accommodated in the case. The spring member generates elastic force that acts in a direction in which the stretching portion is accommodated into the case. A first elastic force of the spring member generated by a first unwinding amount and a second elastic force of the spring member generated by a second unwinding amount are equal to each other.

A display device includes: a closed-bottomed first lens tube including a first display part on the closed bottom for displaying a first image; a closed-bottomed second lens tube including a second display part on the closed bottom for displaying a second image; an adjustment mechanism including an operable part that is provided between and adjusts a distance between the first and second lens tubes; and an eye cup provided for each of the first and second lens tubes that is tubular and detachably attached to the open end of the first or second lens tube. The eye cup includes: an insertion part that is tubular and inserted inside the first or second lens tube; and a cup part having a curved sheet shape that extends outside of the first or second lens tube.

A display apparatus includes a display panel displaying an image; a top chassis provided along an outer periphery of the display panel and supporting the display panel, the top chassis including a magnet fastening portion therein; a chassis cover provided on an exterior of the top chassis and covering the top chassis; a magnet provided on the magnet fastening portion and configured to allow the chassis cover to be detachably mounted to the top chassis; and an elastic bracket configured to fasten the magnet to the magnet fastening portion, the elastic bracket may include a bracket body to which the magnet is mounted and an interference portion configured to interfere with the magnet fastening portion.

This application provides a display device and an audio output method thereof. The display device includes a display, a first speaker, and a second speaker. The first speaker is disposed on a rear side of the display. A sound emitting direction of the first speaker faces toward space in rear of and above the display device. A sound emitting direction of the second speaker faces toward space in front of the display device or faces toward space below the display device. The first speaker and the second speaker emit sounds asynchronously. A stereo effect of the display device in this application is good.

Provided are a set and a display device. The set includes a display module including a display panel, a module mold frame, a front housing and a backplane. At least part of front housing is located on a light-emitting side of display panel and is disposed opposite to at least one side edge of module mold frame; front housing is provided with first and second connecting structures, the module mold frame has a first module mold frame side edge where a third connecting structure is disposed, the backplane of display module is provided with a fourth connecting structure. First and third connecting structures cooperate to limit the position of front housing in a plane parallel to a light-emitting surface of display module; second and fourth connecting structures cooperate to limit the position of front housing in a direction perpendicular to light-emitting surface.

A three-dimensional annotation rendering system includes a calculation device receiving signals captured by right-eye and left-eye cameras, a background image generation unit generating right-eye and left-eye background images, a pointer depth position information generation unit, a pointer longitudinal and lateral position information generation unit, an annotation start/end information generation unit, an annotation-related information storage unit storing depth position information and longitudinal and lateral position information on the pointer from a recording start to a recording end on the annotation, a pointer image generation unit generating right-eye and left-eye pointer images, an annotation-related image generation unit generating right-eye and left-eye annotation-related images, and a background annotation image synthesis unit combining the right-eye and left-eye background images, pointer images, and annotation-related images to generate final right-eye and left-eye images.