Patent ID: 8736522

Claim:
A display device, comprising: a pixel array portion having pixel circuits disposed in a matrix, each of said pixel circuits including a drive transistor disposed at a first wiring layer for generating a drive current, and an electro-optic element connected to an output terminal of said drive transistor, and power source supply lines disposed at a second wiring layer different from the first wiring layer as scanning lines through which pulse-like power source voltages are supplied to power source supply terminals of the drive transistors disposed at the first wiring layer, respectively, wired therein; and a plurality of extension wiring pieces, respective ones of the plurality of extension wiring pieces electrically connected to and between respective ones of the power source supply lines and the power source supply terminals, each one of the plurality of extension wiring pieces having a strip configuration and at least one extension wiring connection segment overlapping the respective one of the power source supply lines, extending in a scanning direction thereacross and sized to accommodate at least two power source contact portions, wherein respective ones of the power source supply lines include at least two contact holes aligned with and corresponding to each one of the plurality of the extension wiring pieces and extending therethough to the respective ones of the plurality of extension wiring pieces, wherein respective ones of the at least two power source contact portions are disposed in and through the respective ones of the at least two contact holes to electrically connect the corresponding power source supply line and the at least one extension wiring connection segment and wherein the power source contact portions through which the corresponding one of said power source supply terminals and the corresponding one of said power source supply lines are connected to each other are provided at predetermined spaced-apart distances extending perpendicularly to a scanning line direction from one another in a plurality of portions for every drive transistor.