An LTPS array substrate, comprising a substrate (101), an insulated gate layer (102), an interlayer insulating layer (103), and an organic film layer (104) that are stacked. A pressure sensing plate (105) is disposed on the organic film layer. A metallic layer is formed on the organic film layer, and the metallic layer is subjected to patterning processing to form a planar touch signal line (106) and a pressure touch signal line (107). The pressure touch signal line is connected to the pressure sensing plate. A passivation layer (112) is comprised. A common electrode plate (110) is formed in the passivation layer. The planar touch signal line is connected to the common electrode plate by means of a touch through hole.