In a display apparatus, each pixel includes a gate line, a storage line spaced apart from the gate line, and a data line crossing the gate line. The pixel includes a switching device connected to the gate line and the data line, a protective layer provided with an opening formed therethrough in an area where the gate line and the storage line are arranged adjacent to each other, and a pixel electrode arranged on the protective layer to be connected to the switching device and overlapped with the storage line. The opening is overlapped either the gate line or the storage line. Thus, a direct-current electric field is formed between the gate line and the storage line corresponding to an area where the opening in the protective layer is formed, and impurity ions are trapped by the direct-current electric field.