Display driver, display device and method of driving display panel

A display device, comprising:

• a display panel comprising gate lines;
• and
• a display driver coupled to the display panel and configured to:
• perform touch sensing during a first touch sensing period of a first field of a vertical sync period and perform touch sensing during a second touch sensing period of a second field of the vertical sync period;
• generate a first set of multi-phase clock signals configured to control first gate line drive signals supplied to the gate lines of the display panel during a first display period of the first field;
• and
• generate a second set of multi-phase clock signals configured to control second gate line drive signals supplied to the gate lines of the display panel during a second display period of the second field of the vertical sync period, wherein a start time of a first multi-phase clock signal of the second set of multi-phase clock signals is based on an internal clock signal of the display driver and is before a start time of the second field of the vertical sync period.

A method for driving a display device having a display driver, the method comprising:

• performing touch sensing during a first touch sensing period of a first field of a vertical sync period;
• generating first multi-phase clock signals configured to control first gate line drive signals supplied to gate lines of a display panel during a first display period of the first field, wherein the first field starts after a delay from an assertion of the vertical sync period, and wherein a start timing of the first display period and a start timing of the first touch sensing period are synchronous with an internal clock signal of the display driver;
• performing touch sensing during a second touch sensing period of a second field of the vertical sync period;
• and
• generating a second set of multi-phase clock signals configured to control second gate line drive signals supplied to the gate lines of the display panel during a second display period of the second field of the vertical sync period, wherein a start time of a first multi-phase clock signal of the second set of multi-phase clock signals is based on the internal clock signal of the display driver and is before a start time of the second field of the vertical sync period.