Multi-display system and control method thereof

A multi-display system comprising:

• a host device;
• and
• a plurality of display apparatuses capable of communicating with the host device, each of the plurality of display apparatus comprising a plurality of backlights, a plurality of backlight state detectors corresponding to the plurality of backlights to respectively detect a target state of the plurality of backlights, and a display controller to generate a signal to communicate the target state of the plurality of backlights to the host devices,
• wherein each of the plurality of display apparatus further comprises an interrupt generator to generate a signal to alert the display controller of the target of any of the backlights detected by the corresponding backlight state detectors.

A method of controlling a multi-display system having a plurality of display apparatuses respectively having at least one backlight, comprising:

• detecting a defective state of the backlight in each of the plurality of display apparatuses;
• generating a corresponding signal for each of the plurality of display apparatus on the basis of the detecting result, to output to a host device from the display apparatus;
• displaying a message informing that the backlight of a corresponding display apparatus is defective if the host device determines that the backlight is defective according to the signal output from the display apparatus;
• and
• generating an active interrupt signal if the defective state is detected in at least one of the display apparatuses.

A display apparatus used with a multi-display system having a host device communicating with the display apparatus, comprising:

• a plurality of backlights;
• a plurality of backlight state detectors corresponding to the plurality of backlights to respectively detect a target state of the plurality of backlights;
• a display controller to generate a signal to communicate the target state of the plurality of backlights to the host device;
• and
• an interrupt generator to generate an interrupt signal to alert the display controller of the target state of the plurality of backlights.

A method of controlling a multi-display system having a plurality of display apparatuses respectively having at least one backlight, the method comprising:

• receiving an output signal from the backlight;
• generating a backlight state detecting signal having either a first state or a second state according to a characteristic of the output signal;
• outputting the backlight state detecting signal to a host device;
• and
• displaying a message informing that the backlight of a corresponding display apparatus is defective if the host device determines that the backlight is defective according to the state of the backlight state detecting signal.