Touch driving circuit and touch display device for reducing noise of touch sensing signal according to display driving
The present disclosure of the disclosure are related to a touch driving circuit and a touch display device, in a touch sensor structure performing a touch sensing based on a mutual-capacitance, as performing a touch sensing based on a self-capacitance and a touch sensing based on the mutual-capacitance, a performance of a touch sensing may be improved. Furthermore, as driving channels of X-touch electrode line of Y-touch electrode line partially in a period performing a touch sensing based on the self-capacitance, the number of channels driven in each period is reduced and a noise according to a display driving may be reduced when performing a touch sensing based on the self-capacitance.
1. A touch display device comprising:
a panel on which a plurality of gate lines, a plurality of data lines and a plurality of subpixels are disposed;
a plurality of emitting devices disposed at the plurality of subpixels;
an encapsulation disposed on each emitting device;
a plurality of touch electrode lines disposed on the encapsulation and including at least one touch electrode; and
a touch driving circuit configured to drive the touch electrode lines,
wherein the plurality of touch electrode lines comprises:
a plurality of X-touch electrode lines disposed in a first direction; and
a plurality of Y-touch electrode lines disposed in a second direction which is different from the first direction,
wherein the touch driving circuit is configured to:
output a touch driving signal to X-touch electrode lines of a first group of the plurality of X-touch electrode lines during a first period of a first touch sensing mode,
output the touch driving signal to X-touch electrode lines of a second group of the plurality of X-touch electrode lines during a second period of the first touch sensing mode, and
output the touch driving signal to at least one Y-touch electrode line of the plurality of Y-touch electrode lines during a third period of the first touch sensing mode.
2. The touch display device of claim 1 , wherein the number of X-touch electrode lines is greater than the number of Y-touch electrode lines.
3. The touch display device of claim 1 , wherein the X-touch electrode lines of the first group is a portion of X-touch electrode lines of the plurality of X-touch electrode lines, and the X-touch electrode lines of the second group is a remaining portion of X-touch electrode lines except for the X-touch electrode lines of the first group of the plurality of X-touch electrode lines.
4. The touch display device of claim 3 , wherein the number of the X-touch electrode lines of the first group is equal to the number of the X-touch electrode lines of the second group.
5. The touch display device of claim 1 , wherein the touch driving signal is supplied to all of the Y-touch electrode lines of the plurality of Y-touch electrode lines in the third period of the first touch sensing mode.
6. The touch display device of claim 1 , wherein the touch driving signal is supplied to a portion of Y-touch electrode lines of the plurality of Y-touch electrode lines in the third period of the first touch sensing mode, and the touch driving signal is supplied to a remaining portion of Y-touch electrode lines of the plurality of Y-touch electrode lines in a fourth period of the first touch sensing mode.
7. The touch display device of claim 1 , wherein the third period is between the first period and the second period.
8. The touch display device of claim 1 , wherein the third period is before the first period and the second period, or is after the first period and the second period.
9. The touch display device of claim 1 , wherein, in a second touch sensing mode after the first touch sensing mode,
the touch driving signal is supplied to the X-touch electrode lines and a constant voltage is supplied to the Y-touch electrode lines, or the touch driving signal is supplied to the Y-touch electrode lines and a constant voltage is supplied to the X-touch electrode lines.
10. The touch display device of claim 9 , wherein the first touch sensing mode is a self-capacitance sensing mode, and the second touch sensing mode is a mutual-capacitance sensing mode.
11. The touch display device of claim 1 , wherein at least one data line of the plurality of data lines receives a data voltage during at least a partial period of the first touch sensing mode.
12. The touch display device of claim 1 , wherein the touch electrode included in the touch electrode line is a mesh type having at least one opening, and at least a part of the touch electrode overlaps with the plurality of data lines.