Display Device with Integrated Touch Screen and Method for Driving the Same

A display device with an integrated touch screen, the display device comprising:

• a panel including a plurality of electrodes that are grouped into a plurality of groups of electrodes including at least a first group of electrodes and a second group of electrodes;
• and
• a driver circuit configured to:
• apply a common voltage to the plurality of electrodes during a first display driving period of a frame,
• apply a touch scan signal to the first group of electrodes and a first outermost electrode string included in the second group of electrodes during a first touch driving period of the frame, the first outermost electrode string adjacent to the first group of electrodes and including at least a first outermost electrode and a second outermost electrode of the second group of electrodes, the touch scan signal applied to the first outermost electrode via a first signal line and to the second outermost electrode via a second signal line that is separate from the first signal line,
• apply the common voltage to the plurality of electrodes during a second display driving mode of the frame, and
• apply the touch scan signal to the second group of electrodes and a second outermost electrode string included in the first group of electrodes during a second touch driving period of the frame, the second outermost electrode string adjacent to the second group of electrodes.

A method of driving a display device with an integrated touch screen, which comprises a panel including a plurality of electrodes that are grouped into a plurality of groups of electrodes including at least a first group of electrodes and a second group of electrodes, and a driver circuit that applies a common voltage or a touch scan signal to the plurality of electrodes, the method comprising:

• applying a common voltage to the plurality of electrodes during a first display driving period of a frame,
• applying a touch scan signal to the first group of electrodes and a first outermost electrode string included in the second group of electrodes during a first touch driving period of the frame, the first outermost electrode string adjacent to the first group of electrodes and including at least a first outermost electrode and a second outermost electrode of the second group of electrodes, the touch scan signal applied to the first outermost electrode via a first signal line and to the second outermost electrode via a second signal line that is separate from the first signal line,
• applying the common voltage to the plurality of electrodes during a second display driving mode of the frame, and
• applying the touch scan signal to the second group of electrodes and a second outermost electrode string included in the first group of electrodes during a second touch driving period of the frame, the second outermost electrode string adjacent to the second group of electrodes.

A driver circuit for driving a display device with an integrated touch screen, the display device comprising a panel including a plurality of electrodes that are grouped into a plurality of groups of electrodes including at least a first group of electrodes and a second group of electrodes, the driver circuit comprising:

• a switching circuit configured to:
• apply a common voltage to the plurality of electrodes during a first display driving period of a frame,
• apply a touch scan signal to the first group of electrodes and a first outermost electrode string included in the second group of electrodes during a first touch driving period of the frame, the first outermost electrode string adjacent to the first group of electrodes and including at least a first outermost electrode and a second outermost electrode of the second group of electrodes, the touch scan signal applied to the first outermost electrode via a first signal line and to the second outermost electrode via a second signal line that is separate from the first signal line,
• apply the common voltage to the plurality of electrodes during a second display driving mode of the frame, and
• apply the touch scan signal to the second group of electrodes and a second outermost electrode string included in the first group of electrodes during a second touch driving period of the frame, the second outermost electrode string adjacent to the second group of electrodes.