Patent ID: 8531620

Claim:
An active matrix substrate comprising: data signal lines extending in a column direction; scanning signal lines extending in a row direction; each first transistor connected to a corresponding one of the data signal lines and a corresponding one of the scanning signal lines; each second transistor connected to the corresponding one of the data signal lines and the corresponding one of the scanning signal lines; each third transistor connected to a scanning signal line adjacent to the corresponding one of the scanning signal lines; and retention capacitor lines, wherein in each pixel region, (i) a first pixel electrode connected to the each first transistor, (ii) a second pixel electrode connected to the each second transistor, and (iii) a coupling electrode, being provided, each of the first and second pixel electrodes and a corresponding one of the retention capacitor lines overlapping one another, a capacitor being defined by the coupling electrode and the second pixel electrode, the coupling electrode being connected to the first pixel electrode via the each third transistor, at least a first region of an insulating layer and at least a second region of the insulating layer being provided thinner than their surrounding regions, the insulating layer being provided between a layer in which the corresponding one of the retention capacitor lines is provided and a layer in which the first and second pixel electrodes are provided, the first region being at least a part in which the insulating layer and each of the corresponding one of the retention capacitor lines and the first pixel electrode overlap each other, and the second region being at least a part in which the insulating layer and each of the corresponding one of the retention capacitor lines and the second pixel electrode overlap each other, the insulating layer has a structure in which a gate insulating film and an interlayer insulating film which covers a channel of a transistor are stacked, and the gate insulating film is removed in (i) said first region of the insulating film and (ii) said second region of the insulating film.