Patent ID: 8502226

Claim:
A liquid crystal display device comprising: a first scan line and a second scan line arranged in parallel or substantially parallel to each other; a first signal line and a second signal line arranged in parallel or substantially parallel to each other; a liquid crystal element and a transistor which are surrounded by the first scan line, the second scan line, the first signal line, and the second signal line, the transistor comprising a gate, a first insulating layer, and a semiconductor layer; and a second insulating layer over the first insulating layer and under the first signal line, wherein the first signal line intersects with the first scan line so that a first step is formed in the first signal line due to the first scan line, wherein the first signal line intersects with the second scan line so that a second step is formed in the first signal line due to the second scan line, wherein the whole of an upper surface of the first signal line exists coplanarly or substantially coplanarly in a region which is interposed between the first step and the second step, and wherein the second insulating layer is in direct contact with the first signal line in the region.