There is provided an active matrix EL display device that can display a
clear multi gray-scale color display to reduce the shift in the potential
caused by the potential drop due to the wiring resistance of a power
source supply line, in order to decrease the unevenness in a display
region. A plurality of drawing out ports of the power source supply line
are arranged. Further, in the wiring resistance between the external
input terminal and the pixel portion power source supply line, potential
compensation is performed by supplying potential to the power source
supply line by a feedback amplifier. Further, in addition to above
structure, the power source supply line may be arranged in a matrix.