Display device with substrate units and a display function layer

A display device, comprising:

• a first substrate unit including a display region and a peripheral region;
• a plurality of signal lines extending in a second direction and being arranged in a first direction which intersects the second direction;
• a plurality of pixels each including a pixel electrode in the display region;
• a plurality of common lines extending in a second direction and being arranged in the first direction;
• a circuit provided in the peripheral region;
• a second substrate including a plurality of sense lines;
• a driver provided in the peripheral region, the driver outputting image signals to the circuit;
• and
• a controller electrically connected to the circuit and the driver, the controller causing the circuit and the driver to implement a first operation and a second operation,
• the first operation including, in a display period,
• selecting one of the plurality of pixels,
• applying an image signal to the selected pixel, and
• applying a display counter potential to at least one of the plurality of common lines,
• the second operation setting, in a non-display period, a potential of at least one of the plurality of signal lines to the same potential as a potential of one of the plurality of common lines.