Patent ID: 8390540

Claim:
An apparatus comprising a pixel array having a plurality of pixels arranged in a matrix form, each of the pixels including: (a) a sampling transistor configured to sample a data potential from a video signal line in response to a change of potential from a control line and generate a sampled data potential, the video signal line being insulated from the control line and crossing the control line; and (b) a light-emitting element configured to emit light whose brightness is commensurate with a magnitude of the sampled data potential, wherein, with one line of the video signal line and the control line called a first line, and the other line of the video signal line and the control line called a second line, the first line includes a first high-fusion-point metal wiring layer and an overlying wiring layer connected to the first high-fusion-point metal wiring layer via contact holes in an insulating layer therebetween, the first high-fusion-point metal wiring layer and a gate electrode of the sampling transistor have a same material composition, and the second line (a) is a single layer wiring provided at a same hierarchical level as the overlying wiring layer, (b) has a same material composition as that of the overlying wiring layer, and (c) crosses the first line at a portion of the first high-fusion-point metal wiring layer.