Display device with built-in touch screen and method of fabricating the same
Disclosed is a display device with a built-in touch screen. The display device includes a gate electrode and a pixel electrode on a substrate, an activation layer and a sensing contact portion, a source electrode and a drain electrode, and a gate insulation layer provided between the gate electrode and the activation layer and between the pixel electrode and the sensing contact portion. Thereby, it is possible to reduce the number of data lines arranged in the display panel. Also disclosed is a method of fabricating a display device with a built-in touch screen. The method includes forming a first gate electrode and a pixel electrode according to a first mask process, and forming an activation layer, a source electrode, a drain electrode, and a touch sensing line according to a second mask process. Thereby, it is possible to reduce the number of mask processes.
1. A display device, the display device comprising:
a plurality of data lines including a first data line and a second data line;
a plurality of gate lines including a first gate line and a second gate line;
a plurality of touch sensing lines including a first touch sensing line and a second touch sensing line; and
a plurality of pixel electrodes including a first pixel electrode and a second pixel electrode; and
a plurality of thin film transistors (TFTs) including a first TFT having a first electrode, a first activation layer, and a second electrode and a second TFT having a first electrode, a second activation layer, and a second electrode,
wherein the plurality of gate lines is extended along a first direction and the plurality of data lines is extended along a second direction,
wherein the plurality of touch sensing lines is extended along the second direction,
wherein the first pixel electrode is electrically connected to the first data line via the first TFT and the second pixel electrode is electrically connected to the second data line via the second TFT,
wherein the first touch sensing line does not overlap with the first data line and the second data line and is disposed between the first data line and the second data line,
wherein the first gate line overlaps with the first activation layer of the first TFT and the second gate line overlaps with the second activation layer of the second TFT,
wherein the first electrode of the first TFT is a protruded portion of the first data line and the first electrode of the second TFT is a protruded portion of the second data line, and
wherein the second electrode of the first TFT is electrically connected to the first pixel electrode via a first contact hole.
2. The display device of claim 1 , further comprising a plurality of touch electrodes including a first touch electrode and a second touch electrode, wherein the first touch sensing line is electrically connected to the first touch electrode and the second touch sensing line is electrically connected to the second touch electrode.
3. The display device of claim 2 , wherein the first touch sensing line is electrically connected to the first touch electrode through a second contact hole.
4. The display device of claim 2 , wherein the first touch sensing line overlaps with the first touch electrode and the second touch electrode and the second touch sensing line overlaps with the second touch electrode.
5. The display device of claim 4 , wherein the first touch sensing line does not overlap with the second touch sensing line.
6. The display device of claim 1 , wherein the first touch sensing line is arranged in parallel with the first data line.
7. The display device of claim 1 , wherein one or more of the plurality of touch sensing lines include a same material as one or more of the plurality of data lines.
8. The display device of claim 1 , wherein one or more of the plurality of touch sensing lines include a same material as the first activation layer of the first TFT.
9. The display device of claim 1 , wherein one or more of the plurality of touch sensing lines include a same material as the first electrode of the first TFT and the second electrode of the first TFT.
10. The display device of claim 1 , wherein the plurality of touch sensing lines is disposed on a first layer of the substrate and the plurality of data lines is disposed on the first layer of the substrate.
11. The display device of claim 1 , wherein the protruded portion of the first data line includes two protruded portions and the second electrode of the first TFT is disposed between the two protruded portions of the first data line, and
wherein the protruded portion of the second data line includes two protruded portions and the second electrode of the second TFT is disposed between the two protruded portions of the second data line.
12. The display device of claim 1 , wherein a portion of the second electrode of the first TFT overlaps with the first gate line, and a portion of the second electrode of the second TFT overlaps with the second gate line.
13. The display device of claim 1 , wherein the first gate line includes a first bent portion, and the second gate line includes a second bent portion, wherein the first bent portion of the first gate line is disposed in a region adjacent the second bent portion of the second gate line.
14. The display device of claim 13 , wherein the display device further comprising a first touch electrode, wherein the first touch sensing line is electrically connected to the first touch electrode via a second contact hole, and
wherein the first bent portion and the second bent portion are disposed in a region adjacent the second contact hole.