A display device with high-definition, in which display unevenness due to
a voltage drop in a wiring or display unevenness due to a variation in
characteristics of TFTs are suppressed. The display device of the
invention comprises a first wiring for transmitting a video signal and a
second wiring for supplying a current to a light emitting element. The
first wiring and the second wiring extend parallel to each other, and are
formed so as to overlap with each other at least partly with an
insulating layer interposed therebetween.