A display device, comprising: a light-transmissive substrate including one surface; first light sources (140a1, 140a2, 140a3, 140a4, 140a5) mounted on the one surface and forming a first row arranged in a first axis direction (x); second light sources (140b1, 140b2, 140b3, 140b4, 140b5) mounted on the one surface and forming a second row arranged in the first axis direction (x); third light sources (140c1, 140c2, 140c3, 140c4, 140c5) mounted on the one surface and forming a third row arranged in the first axis direction (x); a first positive electrode formed on the one surface, lengthily elongated along the first axis direction (x) and positioned above the first row in a second axis direction (y) orthogonal to the first axis direction (x); a first negative electrode formed on the one surface, lengthily elongated along the first axis direction (x) and positioned between the first row and the second row; a second negative electrode formed on the one surface, lengthily elongated along the first axis direction (x), and positioned below the third row in the second axis direction (y); a second positive electrode formed on the one surface, lengthily elongated along the first axis direction (x), and positioned between the second negative electrode and the first negative electrode; wherein the first light sources (140a1, 140a2, 140a3, 140a4, 140a5) are positioned between the first positive electrode and the first negative electrode; the second light sources (140b1, 140b2, 140b3, 140b4, 140b5) are positioned between the first negative electrode and the second positive electrode; the third light sources (140c1, 140c2, 140c3, 140c4, 140c5) are positioned between the second positive electrode and the second negative electrode; characterised in that the display device further comprises, a first connector spaced apart from the one surface, facing the one surface, and connecting the first positive electrode and the second positive electrode; and a second connector spaced apart from the one surface, facing the one surface, and connecting the first negative electrode and the second negative electrode. a light-transmissive substrate including one surface; first light sources (140a1, 140a2, 140a3, 140a4, 140a5) mounted on the one surface and forming a first row arranged in a first axis direction (x); second light sources (140b1, 140b2, 140b3, 140b4, 140b5) mounted on the one surface and forming a second row arranged in the first axis direction (x); third light sources (140c1, 140c2, 140c3, 140c4, 140c5) mounted on the one surface and forming a third row arranged in the first axis direction (x); a first positive electrode formed on the one surface, lengthily elongated along the first axis direction (x) and positioned above the first row in a second axis direction (y) orthogonal to the first axis direction (x); a first negative electrode formed on the one surface, lengthily elongated along the first axis direction (x) and positioned between the first row and the second row; a second negative electrode formed on the one surface, lengthily elongated along the first axis direction (x), and positioned below the third row in the second axis direction (y); a second positive electrode formed on the one surface, lengthily elongated along the first axis direction (x), and positioned between the second negative electrode and the first negative electrode; wherein the first light sources (140a1, 140a2, 140a3, 140a4, 140a5) are positioned between the first positive electrode and the first negative electrode; the second light sources (140b1, 140b2, 140b3, 140b4, 140b5) are positioned between the first negative electrode and the second positive electrode; the third light sources (140c1, 140c2, 140c3, 140c4, 140c5) are positioned between the second positive electrode and the second negative electrode; characterised in that the display device further comprises, a first connector spaced apart from the one surface, facing the one surface, and connecting the first positive electrode and the second positive electrode; and a second connector spaced apart from the one surface, facing the one surface, and connecting the first negative electrode and the second negative electrode.