Backlight unit having a bent substrate and display device including the same

A display device, comprising:

• a panel;
• a bottom cover disposed at a rear of the panel, the bottom cover having a planar surface and a sidewall bent from the planar surface;
• a substrate including a first surface disposed on the side wall and a second surface bent from the first surface;
• a light assembly disposed on the first surface;
• and
• a plurality of leads electrically connected to the light assembly and disposed at the first surface and the second surface of the substrate,
• wherein the bottom cover includes a ribbed portion that protrudes toward the panel, and the ribbed portion includes a protruded surface, and
• wherein the second surface is between the planar surface and the protruded surface.