Touch controller, touch sensing device including the touch controller, operating method of touch controller

1. A touch sensing device comprising:

a touch sensor array including at least one beacon driving section and at least one compensation section, the at least one beacon driving section including a plurality of first touch electrodes, and the at least one compensation section including a plurality of second touch electrodes; and

a touch controller connected to the touch sensor array through at least one first driving channel and at least one second driving channel, and

the touch controller is configured to, during a first uplink period for communication with an active pen,

provide at least one beacon signal to the at least one first driving channel, and

provide at least one compensation signal to the at least one second driving channel, the at least one compensation signal being an inverse of the at least one beacon signal.

2. The touch sensing device of claim 1 , further comprising:

a pixel array including a plurality of pixels; and

at least one common electrode located between the pixel array and the touch sensor array,

the touch controller is further configured to eliminate noise charges introduced into the at least one common electrode through a capacitive coupling between the touch sensor array and the at least one common electrode by providing the at least one beacon signal and the at least one compensation signal to the at least one first driving channel and the at least one second driving channel, respectively.

3. The touch sensing device of claim 1 , wherein the at least one first driving channel includes a same number of channels as the at least one second driving channel.

4. The touch sensing device of claim 1 , wherein, during a discovery mode between the touch sensing device and the active pen;

during a second uplink period, the touch controller is further configured to,

provide the at least one compensation signal to the at least one first driving channel; and

provide the at least one beacon signal to the at least one second driving channel.

5. The touch sensing device of claim 4 , wherein,

the touch controller is connected to the touch sensor array through the at least one first driving channel, the at least one second driving channel, and at least one third driving channel located between the at least one first driving channel and the at least one second driving channel; and

the touch controller is further configured to provide the at least one beacon signal to the at least one third driving channel during the first uplink period and the second uplink period.

6. The touch sensing device of claim 1 , wherein the at least one beacon signal and the at least one compensation signal have the same amplitude.

7. The touch sensing device of claim 1 , wherein the at least one first driving channel and the at least one second driving channel are parallel to each other.

8. The touch sensing device of claim 1 , wherein the at least one compensation section includes at least a first compensation section and a second compensation section, and

the at least one beacon driving section is located between the first compensation section and the second compensation section.

9. The touch sensing device of claim 1 , wherein

the at least one compensation section includes at least a first compensation section and a second compensation section;

the at least one beacon driving section includes at least a first beacon driving section and a second beacon driving section; and

the first compensation section is located between the first beacon driving section and the second beacon driving section.

10. The touch sensing device of claim 1 , wherein, during a pairing mode between the touch sensing device and the active pen,

the touch controller is further configured to change a location of the at least one beacon driving section based on movement of the active pen.

11. The touch sensing device of claim 1 , wherein, during a hover mode and an ink mode between the touch sensing device and the active pen, the touch controller is further configured to:

provide the at least one beacon signal to a plurality of first touch sensors through the at least one first driving channel;

provide the at least one compensation signal to a plurality of second touch sensors through the at least one second driving channel;

provide the at least one beacon signal to a plurality of third touch sensors through at least one third driving channel orthogonal to the at least one first driving channel and the at least one second driving channel; and

provide the compensation signal to a plurality of fourth touch sensors through at least one fourth driving channel parallel to the at least one third driving channel.

12. The touch sensing device of claim 1 , wherein, during a hover mode and an ink mode between the touch sensing device and the active pen, the touch controller is further configured to:

provide the at least one beacon signal to a plurality of first touch sensors through the at least one first driving channel,

provide the at least one compensation signal to a plurality of second touch sensors through the at least one second driving channel, and

float at least one third driving channels orthogonal to the at least one first driving channel and the at least one second driving channel.

13. The touch sensing device of claim 1 , wherein

the touch controller is connected to the touch sensor array through the at least one first driving channel and the at least one second driving channel extending in a first direction and at least one third driving channel and at least one fourth driving channel extending in a second direction; and

during the first uplink period, the touch controller is further configured to provide the at least one beacon signal to the at least one first driving channel and the at least one third driving channel, and provide the at least one compensation signal to the at least one second driving channel and the at least one fourth driving channel.

14. The touch sensing device of claim 13 , wherein the touch controller is further configured to:

provide the at least one beacon signal to the at least one first driving channel and the at least one fourth driving channel, and provide the at least one compensation signal to the at least one second driving channel and the at least one third driving channel during a second uplink period;

provide the at least one beacon signal to the at least one second driving channel and the at least one third driving channel, and provide the at least one compensation signal to the at least one first driving channel and the at least one fourth driving channel during a third uplink period; and

provide the at least one beacon signal to the at least one second driving channel and the at least one fourth driving channel, and provide the at least one compensation signal to the at least one first driving channel and the at least one third driving channel during a fourth uplink period.

15. The touch sensing device of claim 1 , wherein

the touch sensor array includes a plurality of dot sensors;

the at least one beacon driving section includes at least a first beacon driving section and a second beacon driving section; and

the at least one compensation section includes,

a first compensation section adjacent to the first beacon driving section in a first direction, and

a second compensation section adjacent to the first beacon driving section in a second direction and adjacent to the second beacon driving section in the first direction.

16. A touch controller configured to drive a touch sensor array, the touch controller comprising:

a driving circuit including a plurality of transmitters respectively connected to a plurality of driving channels, the plurality of driving channels including at least one first driving channel and at least one second driving channel that are parallel to each other; and

at least one touch processor configured to control the driving circuit to provide at least one beacon signal to the at least one first driving channel and at least one compensation signal to the at least one second driving channel during a first uplink period for communication between the touch controller and an active pen, the at least one compensation signal being an inverse of the at least one beacon signal, and

the at least one beacon signal and the at least one compensation signal have the same amplitude.

17. The touch controller of claim 16 , wherein, during a discovery mode between the touch controller and the active pen:

the at least one touch processor is further configured to,

control the driving circuit to provide the at least one compensation signal to the at least one first driving channel, and

provide the at least one beacon signal to the at least one second driving channel during a second uplink period.

18. The touch controller of claim 17 , wherein

the plurality of driving channels further include at least one third driving channel located between the at least one first driving channel and the at least one second driving channel; and

the touch controller is further configured to control the driving circuit to provide the at least one beacon signal to the at least one third driving channel during the first uplink period and the second uplink period.

19. The touch controller of claim 16 , wherein

the plurality of driving channels further include at least one third driving channel and at least one fourth driving channel orthogonal to the at least one first driving channel and the at least one second driving channel; and

during the first uplink period, the touch processor is further configured to,

provide the at least one beacon signal to the at least one first driving channel and the at least one third driving channel, and

provide the at least one compensation signal to the at least one second driving channel and the at least one fourth driving channel.

20. A method of operating a touch controller for driving a touchscreen, the touchscreen including a touch sensor array, the method comprising:

providing at least one beacon signal to at least one first driving channel connected to the touch sensor array during a first uplink period for communication with an active pen;

during the first uplink period, providing at least one compensation signal to at least one second driving channel connected to the touch sensor array, the at least one second driving channel parallel to the at least one first driving channel, the at least one compensation signal being inverse to the at least one beacon signal;

providing the at least one compensation signal to the at least one first driving channel during a second uplink period; and

providing the at least one beacon signal to the at least one second driving channel during the second uplink period, and

the at least one beacon signal and the at least one compensation signal have the same amplitude.