Active matrix substrate and liquid crystal display device with touch sensor

An active matrix substrate including a plurality of pixel regions, the active matrix substrate comprising:

• a substrate;
• a source metal layer provided on the substrate and including a plurality of source bus lines;
• a lower insulating layer covering the source metal layer;
• an oxide semiconductor TFT provided to each of the pixel regions, and including:
• an oxide semiconductor layer provided on the lower insulating layer;
• a gate insulating layer provided on the oxide semiconductor layer;
• a gate electrode provided across the gate insulating layer from the oxide semiconductor layer;
• and a source electrode and a drain electrode electrically connected to the oxide semiconductor layer,
• an inter-layer insulating layer covering the oxide semiconductor TFT;
• a pixel electrode provided on the inter-layer insulating layer and electrically connected to the drain electrode in each of the pixel regions;
• a common electrode provided across a dielectric layer from the pixel electrode, and including a plurality of sub common electrodes each of which is capable of functioning as a touch sensor electrode;
• a gate metal layer including a plurality of gate bus lines and the gate electrode;
• a drain metal layer including the drain electrode in each of the pixel regions;
• and
• a plurality of touch sensor lines included in the drain metal layer and each electrically connected to a corresponding one of the sub common electrodes, wherein
• the source metal layer includes a light-blocking layer overlapping with a channel region of the oxide semiconductor layer when observed in a normal direction of the substrate.