A liquid crystal display includes a plurality of data lines and a plurality of gate lines disposed on a substrate in horizontal and vertical directions, respectively, pixel electrodes formed at intersecting regions of the data lines and the gate lines, a plurality of erasing signal lines disposed parallel to the gate lines, first thin film transistors, each including a first source electrode connected to one data line, a first gate electrode connected to one gate line, and a first drain electrode connected to one pixel electrode, and second thin film transistors, each including a second drain electrode connected to the pixel electrode, a second gate electrode connected to the erasing signal line, and a second source electrode connected to a predetermined potential.