Patent ID: 7728916
Filing Date: 2010-06-01
Classification: G02F

Abstract:
1. A liquid crystal display device comprising: a liquid crystal display panel including liquid crystal cells and a drive circuit to drive the liquid crystal cells; the liquid crystal cells arranged in a matrix shape, each of the liquid crystal cells including a pixel electrode, a common electrode and a thin film transistor; the drive circuit having a switching device that includes: a gate electrode; a gate insulating film covering the gate electrode; a semiconductor pattern that overlaps the gate electrode with the gate insulating film therebetween; and a plurality of source electrodes and drain electrodes which are formed on the semiconductor pattern and face each other, at least one of the source electrodes and a facing drain electrode being bent in the same direction and disposed within the periphery of the semiconductor pattern; and, a channel formed in a bent structure between the source electrode and drain electrode, wherein the bent portions of the source electrode and drain electrode are disposed within the periphery of the semiconductor pattern, and further comprising; a source line to which the source electrodes are commonly connected; and a drain line to which the drain electrodes are commonly connected and which is parallel to the source line, wherein the source electrodes are connected to and form a first tilt angle with the source line, and the drain electrodes are connected to and form a second tilt angle with the drain line, wherein each of the source and drain electrodes is bent in at least one of a “V”shape or a “U” shape symmetrically around a direction of the source and drain lines, and each of a central portions of the source and drain electrodes with the “V” shape or the “U” shape is disposed on the semiconductor pattern, wherein the switching device contains a plurality of thin film transistors that commonly use the gate electrode and are connected in parallel, and wherein the gate electrode, the semiconductor pattern, the source electrodes and the drain electrodes are symmetrically bent on a center line which is parallel to the source line and the drain line and is located at the center of the semiconductor pattern.