In-cell touch panel

1. An in-cell touch panel having an image display region made up of a plurality of pixels arranged in a first direction and a second direction intersecting the first direction, the in-cell touch panel comprising:

transistors and pixel electrodes respectively provided in the plurality of pixels;

common electrodes arranged in the first direction and the second direction, each faces one or more of the pixel electrodes and are provided separately from each other;

gate lines extending along the first direction and supplying gate signals to the transistors respectively;

data lines extending along the second direction and supplying data signals to the transistors respectively;

dummy data lines extending along the second direction, provided in a same layer as the data lines, and electrically isolated from the transistors; and

touch lines extending along the second direction and each connected to a corresponding one of the common electrodes, wherein

either of the data lines and the dummy data lines are alternately provided for boundaries between two pixels among the plurality of pixels adjacent in the first direction, and

the dummy data lines are connected to each other in a frame region surrounding the image display region.

2. The in-cell touch panel according to claim 1 , wherein the touch lines are provided in a different layer from the data lines.

3. The in-cell touch panel according to claim 1 , wherein

the plurality of pixels are made up of a plurality of types of pixels arranged cyclically and repeatedly along the first direction, and

the touch lines are provided in accordance with a repetition of the plurality of types of pixels.

4. The in-cell touch panel according to claim 1 , wherein the pixels are made up of three types of pixels including red pixels, green pixels, and blue pixels arranged cyclically and repeatedly along the first direction, and corresponding touch lines are provided for every three of the pixels.

5. The in-cell touch panel according to claim 4 , wherein the touch lines are provided only for boundaries between the green pixels and the blue pixels.

6. The in-cell touch panel according to claim 1 , wherein a fixed voltage is applied to the dummy data lines.

7. The in-cell touch panel according to claim 1 , wherein no voltage is applied to the dummy data lines.

8. The in-cell touch panel according to claim 7 , wherein each dummy data line includes a plurality of pieces arranged in the second direction and space apart from each other, and spaces between adjacent two pieces are on the gate lines.

9. The in-cell touch panel according to claim 8 , wherein two gate lines are provided for a boundary between two pixels adjacent in the second direction.

10. An in-cell touch panel having an image display region made up of a plurality of pixels arranged in a first direction and a second direction intersecting the first direction, the in-cell touch panel comprising:

transistors and pixel electrodes respectively provided in the plurality of pixels;

common electrodes arranged in the first direction and the second direction, each faces one or more of the pixel electrodes and are provided separately from each other;

gate lines extending along the first direction and supplying gate signals to the transistors respectively;

data lines extending along the second direction and supplying data signals to the transistors respectively; and

touch lines extending along the second direction and connected to a corresponding one of the common electrodes, wherein

either of the data lines and the touch lines are alternately provided for boundaries between two pixels among the plurality of pixels adjacent in the first direction,

the plurality of pixels are made up of three types of pixels including a red pixel, a green pixel, and a blue pixel, and

six pixels of the red pixel, the green pixel, the blue pixel, the blue pixel, the red pixel, and the green pixel are arranged in this order as one set repeatedly along the first direction.

11. The in-cell touch panel according to any one of claim 1 , wherein the data lines and the touch lines are connected to a source driver with a touch function.