Abstract: A thin-film transistor liquid crystal display includes a substrate, an active layer on the substrate, having first and second impurity regions and first, second, and third non-impurity regions, gate insulating layer on the active layer, first and second electric field control layers on the second and third non-impurity regions, respectively, first and second subsidiary gate electrodes on the first and second electric field control layers, respectively, and a main gate electrode on the gate insulating layer, the main gate electrode contacting the first and second subsidiary gate electrodes and the first and second electric field control layers, respectively.