Patent ID: 7548229

Claim:
A multi-display system comprising: a plurality of display apparatuses respectively comprising: at least one backlight, a backlight state detector provided in each of the plurality of display apparatuses to detect a defective state of the backlight, a communication interface provided in each of the plurality of display apparatuses, and a display controller provided in each of the display apparatuses to generate a corresponding signal for each of the display apparatuses through the communication interface on the basis of a detecting result of the backlight state detector; a host device comprising a display, a communication part to communicate with each of the plurality of display apparatuses, and a host controller to display a message on the display to inform that the backlight of a corresponding display apparatus is defective if it is determined that the backlight is defective according to the signal generated from the display controller; and an interrupt generator to generate an active interrupt signal and to output the active interrupt signal to the display controller if the backlight state detector detects the defective state of at least one of the backlights.