Thin film transistor array panel with directional control electrode and liquid crystal display including the same

1. A thin film transistor array panel comprising:

a gate line;

a data line intersecting the gate line;

a thin film transistor connected to the gate line and the data line;

a pixel electrode separated from the thin film transistor and having a cutout;

a direction control electrode connected to the thin film transistor and overlapping the cutout; and

a coupling electrode connected to the direction control electrode and overlapping the pixel electrode,

wherein the cutout extends along the direction control electrode and a width of the direction control electrode is smaller than that of the cutout.

2. The thin film transistor array panel of claim 1 , further comprising a storage electrode that overlaps the coupling electrode.

3. The thin film transistor array panel of claim 1 , wherein a voltage of the direction control electrode is higher than a voltage of the pixel electrode with respect to a predetermined voltage.

4. The thin film transistor array panel of claim 3 , wherein the voltage of the pixel electrode is lower than 0.5 times the voltage of the direction control electrode.

5. The thin film transistor array panel of claim 4 , wherein the voltage of the pixel electrode is 0.3 to 0.5 times the voltage of the direction control electrode.

6. The thin film transistor array panel of one of claim 2 , wherein the cutout is oblique.

7. The thin film transistor array panel of claim 6 , wherein the cutout has inversion symmetry with respect to the storage electrode.

8. The thin film transistor array panel of claim 2 , wherein at least a part of portions of the coupling electrode overlapping the storage electrode overlaps the pixel electrode.

9. A liquid crystal display comprising:

a gate line;

a data line intersecting the gate line;

a thin film transistor connected to the gate line and the data line;

a coupling capacitor connected to the thin film transistor; and

a liquid crystal capacitor connected to the coupling capacitor,

wherein the coupling capacitor and the liquid crystal capacitor include a pixel electrode having a cutout in common, and the coupling capacitor includes a direction control electrode that overlaps the cutout,

wherein the cutout extends along the direction control electrode and exposes the entire direction control electrode.

10. The liquid crystal display of claim 9 , further comprising a storage capacitor connected to the thin film transistor in parallel with the coupling capacitor.

11. The liquid crystal display of claim 10 , wherein the storage capacitor includes a coupling electrode that is connected to the direction control electrode.

12. The liquid crystal display of claim 9 , wherein a voltage of the direction control electrode is higher than a voltage of the pixel electrode with respect to a predetermined voltage.

13. The liquid crystal display of claim 9 , wherein a voltage of the pixel electrode is lower than 0.5 times a voltage of the direction control electrode.

14. The liquid crystal display of claim 9 , wherein a voltage of the pixel electrode is 0.3 to 0.5 times a voltage of the direction control electrode.

15. A liquid crystal display comprising:

a gate line;

a data line intersecting-the gate line;

a thin film transistor connected to the gate line and the data line;

a pixel electrode separated from the thin film transistor and having a cutout;

a direction control electrode connected to the thin film transistor and overlapping the cutout;

a coupling electrode connected to the direction control electrode and overlapping the pixel electrode; and

a common electrode facing the pixel electrode and the direction control electrode and having a continuous surface,

wherein the cutout extends along the direction control electrode and exposes the entire direction control electrode.

16. The liquid crystal display of claim 15 , further comprising a storage electrode overlapping the coupling electrode.