In-cell touch type display device to reduce capacitive load and driving IC thereof

1. An in-cell touch type display device, comprising: a touch electrode that is in a touch panel and arranged at each touch block;

a sensing line that is connected to the touch electrode, and transfers a touch driving signal from a source driving circuit during a touch sensing period;

a gate-in panel (GIP) circuit that is in an array substrate, and outputs a gate signal to a gate line crossing and overlapping the sensing line, during a display period; and

a load reduction circuit that outputs the touch driving signal to the gate line during the touch sensing period;

wherein a pixel electrode is in a pixel region of the array substrate and corresponds to the touch electrode, and wherein the touch electrode is supplied with a common voltage through the sensing line in the display period.

2. The device of claim 1 , wherein each load reduction circuit is connected to each gate line.

3. The device of claim 1 , wherein each load reduction circuit is connected to at least two neighboring gate lines.

4. The device of claim 1 , wherein the load reduction circuit is connected to one of both opposite ends of the gate line between which a display region of the array substrate are located.

5. The device of claim 1 , wherein the load reduction circuit includes a transistor, and

wherein the device further comprises:

a first transfer line that is connected to a gate terminal of the transistor, and transfers a switching signal which has an off state and an on state in the display period and the touch sensing period, respectively; and

a second transfer line that is connected to a source terminal of the transistor, and transfers the touch driving signal in the touch sensing period.

6. The device of claim 1 , wherein the source driving circuit is configured to output the touch driving signal to a data line in the touch sensing period.

7. The device of claim 1 , wherein a pixel electrode is in a pixel region of the array substrate and corresponds to the touch electrode, and wherein the touch electrode is supplied with a common voltage through the sensing line in the display period.

8. The device of claim 1 , wherein the touch driving signal has a pulse waveform.

9. The device of claim 1 , wherein the gate line extends along a first direction, and the sensing line extends along a second direction crossing the first direction and is connected to an output terminal of the source driving circuit.

10. A driving IC of an in-cell touch type display device, comprising:

an output terminal that outputs a touch driving signal to a sensing line, which is connected to a touch electrode arranged at each touch block, during a touch sensing period;

an output terminal that outputs a switching signal, which has an off state and an on state during a display period and the touch sensing period, respectively, to a first transfer line connected to a gate terminal of a transistor, the transistor connected to a gate line crossing and overlapping the sensing line; and

an output terminal that outputs the touch driving signal to a second transfer line connected to a source terminal of the transistor during the touch sensing period;

wherein a pixel electrode is in a pixel region of an array substrate and corresponds to the touch electrode, and wherein the touch electrode is supplied with a common voltage through the sensing line in the display period.

11. The driving IC of claim 10 , wherein the touch driving signal has a pulse waveform.

12. The device of claim 10 , wherein the gate line extends along a first direction, and the sensing line extends along a second direction crossing the first direction and is connected to the output terminal that outputs the touch driving signal to the sensing line.