Liquid crystal display device and method for manufacturing the same

1. An LCD device, comprising:

a substrate including an active region and a dummy region;

gate and data lines disposed on the substrate crossing each other to define a plurality of pixel regions in the active region;

a pixel electrode disposed in each of the plural pixel regions;

a common electrode which is patterned in the active region to define common electrode pattern portions, respective common electrode pattern portions and the pixel electrodes each forming an electric field;

a first sensing line disposed on the common electrode and electrically connected with the common electrode to sense a user's touch; and

at least one dummy electrode disposed in the dummy region adjacent one of the common electrode pattern portions.

2. The LCD device of claim 1 , wherein the dummy electrode and the common electrode are formed of a same material.

3. The LCD device of claim 1 , wherein the dummy electrode and the common electrode are formed in the same layer.

4. The LCD device of claim 1 , wherein a distance in a first direction between the dummy electrode and an adjacent one of the common electrode pattern portions is substantially the same as a distance in the first direction between neighboring common electrode pattern portions.

5. The LCD device of claim 1 , wherein a fringe field effect is used.

6. The LCD device of claim 1 , wherein the common electrode pattern portions each have a bent shape.

7. The LCD device of claim 6 , wherein the first sensing line is disposed at the bent portion of the common electrode pattern portions to prevent disclination.

8. The LCD device of claim 1 , wherein a side of the dummy electrode toward the adjacent one of the common electrode pattern portions is parallel to a proximal side of the adjacent one of common electrode pattern portions.

9. The LCD device of claim 8 , wherein a shape of a side of the dummy electrode away from the adjacent one of the common electrode pattern portion is different from a shape of the side of the dummy electrode toward the adjacent one of the common electrode pattern portion.

10. The LCD device of claim 8 , wherein the first sensing line is further disposed on the dummy electrode.

11. The LCD device of claim 1 , further comprising a second sensing line disposed over the data line and crossing over the first sensing line, the first sensing line and the second sensing line for sensing a touch position.

12. A method for manufacturing an LCD device, comprising:

sequentially depositing an electrode layer, a sensing line layer, and a photoresist layer on a substrate, the substrate including an active region and a dummy region;

irradiating the photoresist layer with light through a halftone mask;

forming a first photoresist pattern by developing the irradiated photoresist layer;

etching the sensing line layer and the electrode layer using the photoresist pattern as a mask to form a common electrode pattern in the active region having common electrode pattern portions and to form at least one dummy electrode in the dummy region adjacent one of the common electrode pattern portions;

partially removing the first photoresist pattern to form a second photoresist pattern;

etching the sensing line layer using the second photoresist pattern as a mask to form a sensing line pattern having at least a first sensing line; and

removing the second photoresist pattern.

13. The method of claim 12 , wherein the half tone mask includes a non-transmission region through which light does not transmit, a semi-transmission region through which light partially transmits partially, and transmission regions through which light totally transmits,

wherein the transmission region includes a first transmission region corresponding to the active region and a second transmission region corresponding the an interface between the active region and the dummy region, and

wherein a width of the first transmission region is substantially the same as a width of the second transmission region.

14. The method of claim 12 , wherein a distance in a first direction between the dummy electrode and the adjacent one of the common electrode pattern portions is substantially the same as a distance in the first direction between neighboring common electrode pattern portions.

15. The method of claim 12 , wherein the common electrode pattern portions each have a bent shape.

16. The method of claim 15 , wherein the first sensing line is disposed at the bent portion of the common electrode pattern portions to prevent disclination.

17. The method of claim 12 , wherein a side of the dummy electrode toward the adjacent one of the common electrode pattern portions is parallel to a proximal side of the adjacent one of common electrode pattern portions.

18. The method of claim 17 , wherein a shape of a side of the dummy electrode away from the adjacent one of the common electrode pattern portion is different from a shape of the side of the dummy electrode toward the adjacent one of the common electrode pattern portion.

19. The method of claim 17 , wherein the first sensing line is further disposed on the dummy electrode.

20. The method of claim 12 , further comprising forming gate and data lines disposed on the substrate crossing each other to define a plurality of pixel regions in the active region, and

wherein the sensing line pattern further comprises a second sensing line disposed over the data line and crossing over the first sensing line, the first sensing line and the second sensing line for sensing a touch position.