Touch display device including touch driving integrated circuit for noise detection and compensation and operating method of touch driving integrated circuit

1. An operating method of a touch driving integrated circuit (TDI) sensing a user touch or proximity on a touch panel, the method comprising:

transmitting a first touch signal through a first transmission line connected to the touch panel;

receiving a first sensing signal including a first display noise through a reception line connected to the touch panel;

receiving a second display noise through a detection line connected to the touch panel; and

offsetting the first display noise included in the first sensing signal by using the second display noise,

wherein the detection line is a second transmission line which is adjacent to the first transmission line and connected to the touch panel,

wherein, during transmission of the first touch signal, the TDI does not transmit a touch signal sensing the user touch or proximity to the second transmission line.

2. The method of claim 1 , further comprising determining an area of the user touch or proximity on the touch panel based on the first sensing signal from which the first display noise is canceled,

wherein the area corresponds to a point where the first transmission line and the reception line cross or overlap.

3. The method of claim 1 , wherein the method further comprises:

transmitting a second touch signal through the second transmission line;

receiving a second sensing signal including a third display nose through the reception line;

receiving a fourth display noise through the first transmission line; and

offsetting the third display noise included in the second sensing signal by using the fourth display noise.

4. The method of claim 1 , wherein the second transmission line is a dummy transmission line which extends in a same direction as the first transmission line.

5. The method of claim 1 , wherein the first sensing signal further comprises

the first touch signal, which is received through the first transmission line, a mutual capacitor disposed between the first transmission line and the reception line, and the reception line, and

wherein the first display noise received through the reception line is equal to an amount of the second display noise.

6. The method of claim 1 , wherein the method further comprises:

receiving a second sensing signal through the detection line;

receiving a second display noise through the reception line; and

offsetting a noise included in the second sensing signal by using the second display noise.

7. The method of claim 1 , wherein each of the first display noise and the second display noise is generated in an external display panel and is transferred to the touch panel.

8. A touch display device comprising:

a display panel comprising a plurality of pixels;

a touch panel comprising a plurality of transmission lines extending in a row direction and a plurality of reception lines extending in a column direction; and

a touch driving integrated circuit (TDI) configured to provide a touch signal to a first transmission line among the plurality of transmission lines, receive sensing signals including a display noise, which is transferred from the display panel to the touch panel, through the plurality of reception lines, detect the display noise through a second transmission line among the plurality of transmission lines, to offset the display noise included in the sensing signals by using the display noise detected through the second transmission line, and sense a user touch or proximity on the touch panel based on the sensing signals from which the display noise are offset,

wherein during the touch signal being transmitted to the first transmission line, the TDI does not transmit the touch signal to the second transmission line.

9. The touch display device of claim 8 , wherein the TDI comprises:

a touch signal generator configured to generate the touch signal; and

a switching circuit connected to the plurality of transmission lines and the plurality of reception lines,

wherein the switching circuit is configured to perform a switching operation such that the touch signal is provided to the first transmission line, the sensing signals are received through the plurality of reception lines, and the display noise is detected through the second transmission line, and output the display noise and the sensing signals.

10. The touch display device of claim 9 , wherein the TDI further comprises:

a compensation circuit configured to receive the display noise and the sensing signals from the switching circuit, offset the display noise included in the received sensing signals by using the display noise detected through the second transmission line, and output an output signal; and

a touch detecting circuit configured to determine whether the user touch or proximity is made, based on the output signal.

11. The touch display device of claim 8 , wherein the TDI comprises a reference voltage circuit configured to reset a voltage of the second transmission line to a reference voltage during a reset operation, and

wherein the TDI is configured to detect the display noise through the second transmission line after the reset operation.

12. The touch display device of claim 8 , wherein the plurality of pixels are connected to a plurality of data lines and a plurality of gate lines, and

wherein the touch display device further comprises a display driving integrated circuit configured to control voltages of the plurality of data lines and the plurality of gate lines.

13. The touch display device of claim 8 , wherein the touch panel is formed on the display panel.

14. The touch display device of claim 13 , wherein the display noise is a noise transferred from the display panel to the touch panel through a parasitic capacitor formed between the display panel and the touch panel.

15. A touch display device comprising:

a display panel comprising a plurality of pixels;

a touch panel configured to receive a user touch or proximity thereon and comprising a plurality of transmission lines and a plurality of reception lines; and

a touch driving integrated circuit (TDI) configured to transmit a first touch signal sensing the user touch or proximity to a first transmission line among the transmission lines, receive the first touch signal plus a first noise through a first reception line among the reception lines, detect a second noise through at least one of a second transmission line among the transmission lines and a second reception line among the reception lines, and output the first touch signal less the first noise by offsetting the first noise with the second noise for determination of the sensing the user touch or proximity,

wherein, during transmission of the first touch signal, the TDI does not transmit a touch signal sensing the user touch or proximity to the at least one of the second transmission line and the second reception line.

16. The touch display device of claim 15 , wherein the TDI is further configured to transmit a plurality of touch signals, comprising the first touch signal, sensing the user touch or proximity to the plurality of transmission lines, receive the plurality of touch signals plus a plurality of first noises, comprising the first noise, through the reception lines comprising the first reception line, and detect a plurality of second noises comprising the second noise, and output the touch signals less the first noises by offsetting the first noises with the second noises, respectively, and

wherein the second transmission line is the most adjacent to the first transmission line a transmission line, among the transmission lines, and the second reception line is the most adjacent to the first reception line among the reception lines.

17. The touch display device of claim 15 , wherein the TDI is further configured to transmit a plurality of touch signals, comprising the first touch signal, sensing the user touch or proximity to the plurality of transmission lines, receive the plurality of touch signals plus a plurality of first noises, comprising the first noise, through the reception lines comprising the first reception line, and detect a plurality of second noises comprising the second noise, and output the touch signals less the first noises by offsetting the first noises with the second noises, respectively, and

wherein the second transmission line is a dummy line adjacent to the first transmission line, and the second reception line is a dummy line adjacent to the first reception line.

18. The touch display device of claim 15 , wherein the TDI is further configured to sequentially transmit a plurality of touch signals comprising the first touch signal to the plurality of transmission lines, receive the plurality of touch signals plus a plurality of first noises comprising the first noise, and detect a plurality of second noises comprising the second noise, and output the touch signals less the first noises by offsetting the first noises with the second noises, and

wherein the second transmission line is a transmission line to which a second touch signal among the touch signals is transmitted immediately before or after the first touch signal is transmitted to the first transmission line in the sequential transmission of the touch signals to the transmission lines.

19. The touch display device of claim 15 , wherein the first noise comprises a noise generated at a parasitic capacitor which is formed between the display panel and the first reception line and forms a path for the first noise to the first reception line, and

wherein the second noise comprises a noise generated at a parasitic capacitor which is formed between the display panel and the at least one of the second transmission line and the second reception line and forms a path for the second noise to the at least one of the second transmission line and the second reception line.