Display device having in-cell touch structure and method of driving the same

1. A display driver circuit for driving a display device, the display driver circuit comprising:

first circuitry to generate a touch drive signal; and

second circuitry to provide the touch drive signal to touch sense electrodes of the display device and a touch data signal to data lines of the display device during a touch period and to provide display data signals to the data lines of the display device during a display period,

wherein a touch gate signal is provided to gate lines of the display device during the touch period, and

wherein the touch drive signal, the touch data signal, and the touch gate signal are driven in phase with each other and amplitudes of (a) the touch drive signal and (b) one or more of the touch data signal and the touch gate signal are overdriven by their respective overdrive amplitude with respect to a reference waveform during their respective overdrive duration.

2. The display driver circuit of claim 1 , wherein one or more of the overdrive amplitudes or the overdrive durations of the touch data signal or the touch gate signal is different from the overdrive amplitude or overdrive duration of the touch drive signal.

3. The display driver circuit of claim 1 , wherein:

the reference waveform is a pulse waveform periodically alternating between a high level and a low level, and

one or more of the touch driving signal, the touch data signal, and the touch gate signal have two or more different high voltage levels during the high level and two or more different low voltage levels during the low level.

4. The display driver circuit of claim 1 , wherein the overdrive amplitude or the overdrive duration is greater as distance from the second circuitry to the touch sense electrodes, the data lines, or the gate lines is farther.

5. The display driver circuit of claim 1 , wherein the overdrive durations begin when the touch drive signal, the touch data signal, or the touch gate signal transitions from low level to high level, or vice versa.

6. The display driver circuit of claim 1 , wherein amplitudes of two or more of the touch drive signal, the touch data signal, and the touch gate signal are same at transition from low level to high level, or vice versa, said transition occurring subsequent to end of the overdrive duration, regardless of position in the data lines or the gate lines or of the touch sense electrodes.

7. A method for driving a display device, the method comprising:

generating a touch drive signal; and

providing the touch drive signal to touch sense electrodes of the display device and a touch data signal to data lines of the display device during a touch period and to provide display data signals to the data lines of the display device during a display period,

wherein a touch gate signal is provided to gate lines of the display device during the touch period, and

wherein the touch drive signal, the touch data signal, and the touch gate signal are driven in phase with each other and amplitudes of (a) the touch drive signal and (b) one or more of the touch data signal and the touch gate signal are overdriven by their respective overdrive amplitude with respect to a reference waveform during their respective overdrive duration.

8. The method of claim 7 , wherein one or more of the overdrive amplitudes or the overdrive durations of the touch data signal or the touch gate signal is different from the overdrive amplitude or overdrive duration of the touch drive signal.

9. The method of claim 7 , wherein:

the reference waveform is a pulse waveform periodically alternating between a high level and a low level, and

one or more of the touch driving signal, the touch data signal, and the touch gate signal have two or more different high voltage levels during the high level and two or more different low voltage levels during the low level.

10. The method of claim 7 , wherein the overdrive amplitude or the overdrive duration is greater as distance from the second circuitry to the touch sense electrodes, the data lines, or the gate lines is farther.

11. The method of claim 7 , wherein the overdrive durations begin when the touch drive signal, the touch data signal, or the touch gate signal transitions from low level to high level, or vice versa.

12. The method of claim 7 , wherein amplitudes of two or more of the touch drive signal, the touch data signal, and the touch gate signal are same at transition from low level to high level, or vice versa, said transition occurring subsequent to end of the overdrive duration, regardless of position in the data lines or the gate lines or of the touch sense electrodes.

13. A display device comprising:

a panel including a plurality of data lines, a plurality of gate lines, and a plurality of electrodes grouped into a plurality of electrode groups, pixels of the display device being defined at intersections of the gate lines and the data lines;

a touch driver to provide a touch drive signal to the electrodes of the display device during a touch period;

a data driver to provide display data signals to the data lines of the display device during a display period and a touch data signal to the data lines of the display device during the touch period; and

a gate driver sequentially supplying a scanning signal to the gate lines during the display period and to provide a touch gate signal to the gate lines during the touch period,

wherein the touch drive signal, the touch data signal, and the touch gate signal are driven in phase with each other and amplitudes of (a) the touch drive signal and (b) one or more of the touch data signal and the touch gate signal are overdriven by their respective overdrive amplitude with respect to a reference waveform during their respective overdrive duration.

14. The display device of claim 13 , wherein one or more of the overdrive amplitudes or the overdrive durations of the touch data signal or the touch gate signal is different from the overdrive amplitude or overdrive duration of the touch drive signal.

15. The display device of claim 13 , wherein:

the reference waveform is a pulse waveform periodically alternating between a high level and a low level, and

one or more of the touch driving signal, the touch data signal, and the touch gate signal have two or more different high voltage levels during the high level and two or more different low voltage levels during the low level.

16. The display device of claim 13 , wherein the overdrive amplitude or the overdrive duration is greater as distance from the second circuitry to the touch sense electrodes, the data lines, or the gate lines is farther.

17. The display device of claim 13 , wherein the overdrive durations begin when the touch drive signal, the touch data signal, or the touch gate signal transitions from low level to high level, or vice versa.

18. The display device of claim 13 , wherein amplitudes of two or more of the touch drive signal, the touch data signal, and the touch gate signal are same at transition from low level to high level, or vice versa, said transition occurring subsequent to end of the overdrive duration, regardless of position in the data lines or the gate lines or of the touch sense electrodes.