A display device includes: a first insulating substrate; a main pixel which is formed on the first insulating substrate and comprises a plurality of sub-pixels and a single sensing electrode; a second insulating substrate which faces the first insulating substrate; a sensing spacer formed on the second insulating substrate which faces the sensing electrode; and a contact electrode formed on the sensing spacer.
1. A display device comprising:
a first insulating substrate;
a main pixel formed on the first insulating substrate having a plurality of sub-pixels and a single sensing electrode;
a second insulating substrate facing the first insulating substrate;
a sensing spacer formed on the second insulating substrate which faces the sensing electrode; and
a contact electrode formed on the sensing spacer.
2. The display device according to claim 1 , wherein each sub-pixel comprises:
a gate line;
a data line which intersects the gate line;
a thin film transistor connected to the gate line and the data line; and
a pixel electrode electrically connected to the thin film transistor,
wherein the main pixel comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel.
3. The display device according to claim 2 , further comprising:
a first sensing line formed parallel with the gate line;
a second sensing line formed parallel with the data line; and
an extending part which extends from the second sensing line and overlaps with the sensing electrode.
4. The display device according to claim 3 , wherein the main pixel comprises:
a first main pixel which comprises a Y-sensing electrode connected to the first sensing line; and
a second main pixel which comprises an X-sensing electrode connected to the second sensing line,
wherein the first main pixel and the second main pixel are disposed alternately.
5. The display device according to claim 2 , wherein the pixel electrode in each sub-pixel has substantially the same area.
6. The display device according to claim 2 , wherein the pixel electrode of the one sub-pixel having the sensing electrode is smaller in area than the area of the other sub-pixels.
7. The display device according to claim 6 , wherein a pixel electrode of the blue sub-pixel having the sensing electrode is smaller in area than the area of the other sub-pixels.
8. The display device according to claim 1 , wherein the sensing electrode is formed in the same layer as the pixel electrode.
9. The display device according to claim 1 , further comprising a common electrode formed on the second insulating substrate, wherein the common electrode and the contact electrode are supplied with a common voltage of a predetermined level.
10. The display device according to claim 9 , wherein the contact electrode is formed in the same layer as the common electrode.
11. The display device according to claim 9 , wherein the contact electrode is formed in a different layer from the common electrode.
12. The display device according to claim 1 , further comprising a cell gap spacer formed on the second insulating substrate.