When each of a plurality of projection devices projects an image on a screen, in order to easily determine whether or not an association between identification information of each of the plurality of projection devices and positional relationship of each of the plurality of projection devices is correct, an image for notifying of an association between a predetermined area included in a display pattern and an external projection device is projected, and a communication unit of a projection device transmits information related to the association between the predetermined area included in the display pattern and the external projection device, which is inputted by an input unit, to the external projection device.

When each of a plurality of projection devices projects an image on a screen, in order to easily determine whether or not an association between identification information of each of the plurality of projection devices and positional relationship of each of the plurality of projection devices is correct, an image for notifying of an association between a predetermined area included in a display pattern and an external projection device is projected, and a communication unit of a projection device transmits information related to the association between the predetermined area included in the display pattern and the external projection device, which is inputted by an input unit, to the external projection device.

A display device includes a display screen having a first and second ends opposite to each other in a length direction of the display screen; a receiving member connected to the first end, a visible area of the display screen includes a display area, as the second end moves forth and back relative to the receiving member in the length direction, the display screen may be gradually retracted to the receiving member or unfolded from the receiving member, so that a size of the display area changes continuously; a sensor assembly that is used for detecting motion condition of the display screen being retracted or unfolded; and a controller that is configured, according to the motion condition of the display screen, to control the display area with a size continuously changed in the display screen to display a screen corresponding to a size of the display area in real time.

An electronic apparatus includes a coupler to which an external apparatus is detachably attached, an interface, a wireless power transmitter; a communicator; and a processor configured to control the wireless power transmitter to transmit power received from an external apparatus that is connected through the interface to a display panel of the external electronic apparatus that is attached through the coupler, and control the communicator to transmit a video signal received from an external apparatus which is connected through the interface to the display panel.

A flat-screen display wall mount cover protects exposed cables and equipment behind a television or other mounted monitor. The apparatus is configured to be selectively permeable with respect to infrared signals and heat, while being impermeable to dust or harmful airborne particles. The apparatus includes a first flexible crossbar, a second flexible crossbar, a first display-bracing rod, a second display-bracing rod, a first wall-bracing rod, a second wall-bracing rod, and an opaque fabric cover. The first flexible crossbar and the second flexible crossbar are preferably hollow cylindrical units which support and arrangement the opaque fabric cover. Tension from the flexible crossbars allows the apparatus to conform to varying spaces behind a mounted monitor. The display-bracing rods support and position the opaque fabric cover by pressing against a monitor or television. The wall-bracing rods support and position the opaque fabric cover by pressing against the adjacent wall.

Mounting systems can attach electronic devices to a wall such as a wall of a television or a wall of a building. Electronic devices can generate a substantial amount of heat that can be trapped by mounting systems. The mount ventilation systems described herein can allow cool air to flow around electronic devices.

Mounting systems can attach electronic devices to a wall such as a wall of a television or a wall of a building. Electronic devices can generate a substantial amount of heat that can be trapped by mounting systems. The mount ventilation systems described herein can allow cool air to flow around electronic devices.

A display apparatus including: a display panel configured to display an image; and a rear chassis arranged at a rear side of the display panel, the rear chassis comprising a back plate forming a back surface of the rear chassis, an upper frame coupled to an upper end of the back plate, and a lower frame coupled to a lower end of the back plate, wherein the rear chassis is curved so that lateral sides thereof protrude forward.

A display apparatus including: a display panel configured to display an image; and a rear chassis arranged at a rear side of the display panel, the rear chassis comprising a back plate forming a back surface of the rear chassis, an upper frame coupled to an upper end of the back plate, and a lower frame coupled to a lower end of the back plate, wherein the rear chassis is curved so that lateral sides thereof protrude forward.

In a head-mounted display including a light-emitting unit for specifying a posture, control of luminance of the light-emitting unit is enabled without separately providing a device for measuring the luminance of the light-emitting unit. A posture specifying unit specifies a posture of an HMD including a light-emitting unit that emits light at luminance according to drive current, the posture specified based on a posture specifying image taken by a camera, the posture specifying image including an image of the light-emitting unit. A luminance information specifying unit specifies information indicating the luminance of the light-emitting unit based on a luminance specifying image taken by the camera that takes the posture specifying image, the luminance specifying image including an image of the light-emitting unit. A drive current control unit controls the drive current of the light-emitting unit based on the specified information indicating the luminance of the light-emitting unit.