DISPLAY DEVICE, SWITCHING CIRCUIT, AND FIELD EFFECT TRANSISTOR

摘要

PROBLEM TO BE SOLVED: To provide a display device for simultaneously suppressing OFF current characteristics of a field effect transistor used for a switching circuit for driving pixels and improving ON current characteristics and improving an image quality by improving performance of the switching circuit. SOLUTION: In the switching circuit including one field effect transistor or a plurality of field effect transistors connected in series electrically, at least partial width of a semiconductor layer 15 serving as a channel of at least one field effect transistor is changed continuously in the direction of channel length. For example, width of a part at a source side of the semiconductor layer 15 in the channel section is decreased linearly from W50to W51and width of other parts is fixed to W51. COPYRIGHT: (C)2011,JPO&INPIT