A display device and a method of driving a display device are provided. A display device includes a substrate, a first conductive layer on the substrate and including a lower light blocking pattern, a buffer layer on the first conductive layer, a semiconductor layer including a semiconductor pattern on the buffer layer, a gate insulating layer on the semiconductor pattern, a second conductive layer including a gate electrode on the gate insulating layer, a planarization layer on the second conductive layer, and a third conductive layer on the planarization layer and including a first conductive pattern electrically coupling the lower light blocking pattern to the semiconductor pattern, wherein the first conductive pattern is coupled to the lower light blocking pattern through a first contact hole passing through the planarization layer and the buffer layer, and coupled to the semiconductor pattern through a second contact hole passing through the planarization layer.