Active matrix substrate and organic EL display device

An analog gradation-driving active matrix substrate, comprising multiple pixels each including a current-driven light-emitting element and a drive transistor, the current-driven light-emitting element including a pixel electrode electrically coupled with the drive transistor,

• a semiconductor layer, a first interlayer insulating layer, a first wiring layer, a second interlayer insulating layer, a second wiring layer, a third interlayer insulating layer, and the pixel electrode being disposed in the stated order,
• a scanning line and a power-source line being provided in the first wiring layer, a signal line being provided in the second wiring layer, the drive transistor supplying a current to the current-driven light-emitting element through the pixel electrode, the multiple pixels including a first pixel,
• the pixel electrode of the current-driven light-emitting element of the first pixel being provided with an opening at a position overlapping a gate electrode of the drive transistor of the first pixel,
• a first portion of the gate electrode of the first pixel being transferred from the first wiring layer to the second wiring layer via a contact hole at a portion where the first portion of the gate electrode overlaps the scanning line of the first wiring layer and being included in the second wiring layer directly under the pixel electrode of the first pixel,
• a capacitor being formed in a portion where the semiconductor layer overlaps the power-source line provided in the first wiring layer via the first interlayer insulating layer and a portion where the power-source line overlaps the first portion of the gate electrode of the second wiring layer via the second interlayer insulating layer,
• the multiple pixels including a second pixel and a third pixel disposed adiacent to the first pixel,
• a second portion of the gate electrode of the drive transistor of the first pixel being disposed between the pixel electrode of the current-driven light-emitting element of the first pixel and the pixel electrode of the current-driven light-emitting element of the second pixel and between the pixel electrode of the current-driven light-emitting element of the first pixel and the pixel electrode of the current-driven light-emitting element of the third pixel in a plan view of a main face of the substrate, wherein the second portion of the gate electrode does not overlap any pixel,
• the second portion of the gate electrode of the drive transistor of the first pixel being disposed such that edge portions of the second portion of the gate electrode correspond to edge portions of the pixel electrode of the current-driven light-emitting element of the third pixel.