Display device

A display device comprising:

• a plurality of scanning lines provided over an insulating surface;
• a plurality of video signal lines provided, intersecting with the plurality of scanning lines;
• a display area including a plurality of pixels, each having a light emitting element and a transistor for controlling a current supplied to the light emitting element, provided at points of intersection between the plurality of scanning lines and the plurality of video signal lines;
• and
• a touch sensor provided over the display area and having a drive electrode and a detection electrode which form an electrostatic capacitance with each other,
• wherein between a period during which one row of the plurality of scanning lines is selected and a period during which a next row is selected in the display area, a period is configured to be provided in which a drive signal having a rise or fall is inputted to the drive electrode in the touch sensor, and
• at the rise or fall of the drive signal, each of the plurality of scanning lines and the plurality of video signals lines has a constant potential.

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

• a plurality of scanning lines provided over an insulating surface;
• a plurality of video signal lines provided, intersecting with the plurality of scanning lines;
• a display area including a plurality of pixels, each having a light emitting element and a transistor for controlling a current supplied to the light emitting element, provided at points of intersection between the plurality of scanning lines and the plurality of video signal lines;
• and
• a touch sensor provided over the display area and having a drive electrode and a detection electrode which form an electrostatic capacitance with each other,
• wherein a video is displayed in the display area via an initialization period during which a gate or source of the transistor has a constant potential,
• an offset cancellation period during which a potential difference corresponding to a threshold is generated between the gate and source of the transistor,
• a video signal write period during which a video signal is inputted to the gate of the transistor from the video signal line, and
• a light emission period during which the current is supplied to the light emitting element based on a gate-source voltage decided during the video signal write period,
• touch detection is carried out on the touch sensor via a touch detection period in which a drive signal having a rise or fall is inputted to the drive electrode and in which potential fluctuation at the detection electrode is acquired, and
• the touch detection period on one row in the touch sensor is included in the offset cancellation period on one row in the display area.