Abstract: A display apparatus and a control method thereof, shutter glasses and a method of controlling the same, and a display system having the display apparatus and the shutter glasses. The display apparatus includes a display panel, a light source unit which generates light that is provide to the display panel to display an image on the display panel, and a controller which controls turning on and off of the light source unit based on a pattern corresponding to first information during a non-display period during which an image frame is not displayed on the display panel so an external device configured to detect light from the light source unit extracts the first information corresponding to a turning on and off pattern of the light source unit.

Abstract: A station device includes an output unit that outputs a massage, a communication unit that communicates with a wireless access point which is movable from one place to another place, a determination unit that determines current communication performance with the wireless access point, a storage unit that stores the determined current communication performance, and a controller that compares the current communication performance with pre-stored previous communication performance and controls the output unit to output a message according to a result of the comparison.

Abstract: A device and method for producing functional pocket spring mattresses, and a mattress produced by the method, in which a predetermined number of pocket springs each prepared by connecting a predetermined number of pocket spring units to each other in the form of a band are arrayed to fit a bed mattress of a desired predetermined size.