In plane switching mode liquid crystal display device and fabrication method thereof

1. An in-plane switching mode liquid crystal display device comprising:

first and second substrates;

a gate line and a data line arranged in a substantially horizontal and vertical direction, respectively, on the first substrate to define a pixel region;

a switching device formed at a crossing of the gate line and the data line;

a common line formed substantially parallel to the data line at a center of the pixel region;

a pixel electrode line overlapping the common line;

a plurality of common electrodes extended from the common line;

pixel electrodes extended from the pixel electrode line and disposed substantially parallel to the common electrodes, wherein a lateral electric field is formed within the pixel region between the common electrodes and the pixel electrodes; and

a liquid crystal layer formed between the first substrate and the second substrate.

2. The device of claim 1 , wherein the common electrodes are symmetric with respect to the common line.

3. The device of claim 1 , wherein the pixel electrodes are symmetric with respect to the pixel electrode line.

4. The device of claim 1 , wherein the common electrodes are substantially parallel to the gate line.

5. The device of claim 1 , wherein the common electrodes have a bent structure with respect to the common line.

6. The device of claim 5 , wherein the bent structure has a “Λ” shape.

7. The device of claim 5 , wherein the bent structure has a “V” shape.

8. The device of claim 5 , wherein the gate line has a bent structure with respect to the common line.

9. The device of claim 8 , wherein the bent structure has a “Λ” shape.

10. The device of claim 8 , wherein the bent structure has a “V” shape.

11. The device of claim 1 , further comprising an auxiliary line formed adjacent to the data line at an outer edge of the pixel region.

12. The device of claim 11 , wherein the auxiliary line is a data signal shielding line and is electrically connected to the common electrodes.

13. The device of claim 1 , wherein the switching device comprises:

a gate electrode connected to the gate line;

a gate insulation film formed on the gate electrode;

a semiconductor layer formed on the gate insulation film; and

a source electrode and a drain electrode formed on the semiconductor layer.

14. The device of claim 1 , wherein the second substrate comprises a color filter and a black matrix.

15. A fabrication method of an in-plane switching mode liquid crystal display device comprising:

providing first and second substrates;

forming a gate line, a common line and common electrodes on the first substrate, wherein the common electrodes are extended from the common line and symmetric with respect to the common line;

forming a data line crossing the gate line to define a pixel region, a pixel electrode line disposed substantially parallel to the data line at a center of the pixel region and overlapping the common line to form a storage capacitor, and pixel electrodes forming a lateral electric field together with the common electrodes; and

forming a liquid crystal layer between the first and second substrates.

16. The method of claim 15 , further comprising forming a gate insulation film between the common line and the pixel electrode line.

17. The method of claim 15 , further comprising forming a black matrix and a color filter on the second substrate.

18. The method of claim 15 , further comprising forming a shielding line adjacent to the data line at an outer edge of the pixel region.

19. The method of claim 15 , wherein the pixel electrodes or the common electrodes are made of a transparent conductive material such as ITO (indium tin oxide) or IZO (indium zinc oxide).