The present disclosure provides a liquid crystal display device, an array substrate, and a method for manufacturing the array substrate. The array substrate includes a glass substrate, gate scan lines formed on the glass substrate, and a pixel electrode. An edge of the pixel electrode has an overlapping region with the gate scan lines, and the pixel electrode and the gate scan lines form a parasitic capacitance in the overlapping region. The overlapping region between the pixel electrode and the gate scan lines is configured with at least one protection layer that reduces the parasitic capacitance.