Detecting apparatus and display apparatus

A display device comprising:

• a first pixel;
• a first video signal line coupled to the first pixel, and supplied with a video signal;
• and
• a common electrode facing the first pixel, and supplied with a common voltage, wherein
• in a first display mode, the common electrode is supplied with a DC voltage as the common voltage, and
• in a second display mode, the common electrode is supplied with an AC voltage as the common voltage.

A control method for a display device, the display device including:

• a first pixel;
• a second pixel arranged next to the first pixel in a first direction;
• a first video signal line coupled to the first pixel;
• a second video signal line coupled to the second pixel;
• and
• a common electrode facing the first pixel and the second pixel,
• the control method comprising:
• implementing a first display mode and a second display mode in a switchable manner,
• in the first display mode,
• supplying a DC voltage to the common electrode;
• supplying a video signal having a first polarity with respect to the DC voltage to the first video signal line;
• and
• supplying a video signal having a second polarity with respect to the DC voltage, the second polarity being opposite to the first polarity;
• and
• in the second display mode,
• supplying an AC voltage to the common electrode;
• and
• supplying a video signal having the first polarity with respect to the AC voltage to each of the first video signal line and the second video signal line.