Patent ID: 8730442

Claim:
A liquid crystal display device having a thin film transistor substrate, the thin film transistor substrate comprising: pixel electrodes arranged in pixels for controlling the alignment of a liquid crystal composition by applying a voltage thereto; thin film transistors which operate as switches for applying the voltage to the pixel electrodes wherein each of the thin film transistors includes a source-drain path including a source connected to a source electrode and a source electrode contact portion, a drain, and a channel portion extending between the source and the drain; and a conductive layer which is formed in a different layer at a different level from the pixel electrodes; wherein each of the pixel electrodes includes: a contact portion electrode which is connected to the source electrode and is formed to be smaller in contact area than the source electrode contact portion; an upper channel portion electrode which is formed so as to substantially completely cover an entire channel length of the channel portion of the adjacent one of the pixels; an opening portion electrode which has a plurality of electrode lines, each of which has a line width and connects the contact portion electrode and the upper channel portion electrode; and the contact portion electrode, the opening portion electrode and the upper channel portion electrode are located relative to one another in series so that the contact portion electrode is connected to the upper channel portion electrode through the opening portion electrode.