A display device in which the current load of wirings are distributed and
display variations due to voltage drop are suppressed. An active matrix
display device of the invention comprises a first current input terminal,
a second current input terminal, and a plurality of current supply lines
extending parallel to each other. Each current supply line is connected
to a plurality of driving transistors in a line. One end of each current
supply line is connected to the first current input terminal via a first
wiring intersecting with the current supply lines, and the other end
thereof is connected to the second current input terminal via a second
wiring intersecting with the current supply lines. Accordingly, a current
is supplied to each current supply line from both the first and the
second current input terminals. The first and the second current input
terminals are provided separately from each other.