Display device

摘要

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.

主权项

1. A display device comprising:
a first power supply line; a first insulating film over the first power supply line, the first insulating film comprising a contact hole; a second power supply line over the first insulating film, the second power supply line being disposed in a direction perpendicular to the first power supply line; a second insulating film over the second power supply line; a pixel electrode over the second insulating film; and a third insulating film over the second insulating film, the third insulating film comprising an opening, wherein the second power supply line is electrically connected the first power supply line through the contact hole, wherein the opening and the pixel electrode overlap each other, and wherein the third insulating film and the contact hole overlap each other.