According to one or more embodiments, a display device may include: a display panel; a frame located behind the display panel, and to which the display panel is coupled; a substrate located between the display panel and the frame, fixed to the frame, and extending along a length direction; a plurality of light sources successively mounted on the substrate along the length direction of the substrate; and a lens extending along the length direction of the substrate to cover the plurality of light sources, and fixed to the substrate, wherein the lens may include: a first dome portion which forms an upper surface, and is convex; a second dome portion which forms an upper surface, and is adjacent to the first dome portion; a receiving portion recessed from a lower surface of the lens toward the upper surface, and in which the plurality of light sources are located.