A pixel structure includes a patterned semiconductor layer disposed on a transistor region of the substrate, a first capacitor electrode disposed on a capacitor region of the substrate, a gate dielectric layer disposed on the first capacitor electrode, a gate disposed on a channel region of the patterned semiconductor layer, a second capacitor electrode, a dielectric layer, and an aluminum capacitor electrode sequentially disposed on the gate dielectric layer of the capacitor region, a first dielectric layer disposed on the gate and the aluminum capacitor electrode, at least one first wire disposed in the first dielectric layer for electrically connecting source/drain region of the patterned semiconductor layer and the aluminum capacitor electrode, a second dielectric layer disposed on the first wire, and a first transparent conductive layer disposed on the second dielectric layer and connected to the first wire.