Display device configuring multi display system and control method thereof

A display device configuring a multi display system, the display device comprising:

• an input configured to be connected to an adjacent display device;
• a display;
• and
• a processor,
• wherein an image received through the input comprises an image in which frames of a first predetermined interval in a first image and frames of a second predetermined interval in a second image are alternately disposed, and image output information is inserted into at least one of the frames of the first interval and the frames of the second interval, and
• the processor is configured to distinguish the frames of the first interval and the frames of the second interval by detecting the image output information from the frames of the received image, and to control the display to display some regions of one of the frames of the first interval and the frames of the second interval based on display layout information.

A method of controlling a display device configured as a multi display system, the method comprising:

• receiving a first image and a second image;
• inserting image output information into at least one of frames of a first predetermined interval in the first image and frames of a second predetermined interval in the second image;
• alternately transmitting the frames of the first interval and the frames of the second interval to an adjacent display device connected to the display device;
• and
• displaying some regions of one of the frames of the first interval and the frames of the second interval based on display layout information.