Image display device

An image display device comprising:

• a display panel;
• a backlight unit including a plurality of blocks composed of light sources;
• and
• a controller,
• wherein the backlight unit comprises a plurality of driving units each including a driver integrated circuit (IC) configured to adjust an intensity of light emitted from the respective blocks,
• wherein the plurality of driving units comprise main driving units electrically connected to the controller through main cables, and sub-driving units electrically connected to the main driving units through sub-cables,
• wherein signals transmitted to the main driving units through the main cables are transmitted to the sub-driving units through the sub-cables,
• wherein the controller is configured to output, through the main cables, a first signal including a dimming value of each block that corresponds to the intensity of light emitted from each of the plurality of blocks, a second signal corresponding to the main driving unit, and a third signal corresponding to the sub-driving unit,
• wherein the main driving unit is configured to determine a first dimming value corresponding to the main driving unit from a first portion of the first signal corresponding to the second signal, and the sub-driving unit is configured to determine a second dimming value corresponding to the sub-driving unit from a second portion of the first signal corresponding to the third signal,
• wherein the main driving unit comprises a first substate on which a first connector connected to the main cable and a second connector connected to the sub-cable are mounted, and the sub-driving unit comprises a second substrate on which a third connector connected to the sub-cable is mounted,
• wherein the first substrate and the second substrate are disposed adjacent to each other.