PURPOSE: A video wall display system is provided to simplify the cable connection by serially connecting a pair of input/output connecter to an adjacent display device. CONSTITUTION: A pair of I/O(Input/Output) connectors(110) are connected with a first adjacent display device among a plurality of display units. A pair of input connectors(111) input image signal from the first adjacent display device. One or more output connectors(112,113) of the I/O connector are connected to a second adjacency display device. A signal processing unit(120) processes the image signal. A display unit(130) displays the image based on the processed image signal.
