Because the driving voltage line PL extends along a second direction Y, and the electrode voltage line HL electrically connected to the driving voltage line PL extends along the first direction X intersecting or crossing the second direction Y, a plurality of driving voltage lines PL and a plurality of electrode voltage lines HL may form a mesh structure in a display area.

The data line DL, the driving voltage line PL, an initialization connection line 1173, and the node connection line 1174 may be arranged over the electrode voltage line HL with one or more insulating layers therebetween.

The data line DL may extend in the second direction (e.g., second direction Y) and may be connected to the switching source electrode S2 of the switching thin film transistor T2 through a contact hole 1154. A portion of the data line DL may be understood as (e.g., may correspond to) a switching source electrode.

The driving voltage line PL may extend in the second direction Y and may be connected to the electrode voltage line HL through the contact hole CNT as described above. Also, it may be connected to the operation control thin film transistor T5 through a contact hole 1155. The driving voltage line PL may be connected to the operation control drain electrode D5 through the contact hole 1155.

One end of the initialization connection line 1173 may be connected to the first and second initialization thin film transistors T4 and T7 through a contact hole 1152, and the other end thereof may be connected to the initialization voltage line VL through a contact hole 1151, which will be described in more detail below.