Display device and touch detection device

A display device comprising:

• a pixel array which includes a plurality of pixels arranged in a matrix form;
• a plurality of scan lines which are arranged in each row of the pixel array;
• a plurality of signal lines which are arranged in each column of the pixel array;
• a plurality of common electrodes configured to generate electric fields between the common electrodes and a plurality of pixel electrodes in a display period,
• an adjustment circuit coupled to each of the plurality of common electrodes forming closed loop winding coils that generate a magnetic field in a first touch detection period at a first time in a single frame, and at a second time in the single frame forming open loop electrodes that generate an electric field in a second touch detection period, wherein at a third time in the single frame, the plurality of common electrodes generate the electric fields in the single frame between the common electrodes and the plurality of pixel electrodes;
• a first driving wiring configured to drive the closed loop winding coils in the first touch detection period to generate the magnetic field;
• and
• a second driving wiring configured to drive the open loop electrodes in the second touch detection period,
• wherein the plurality of common electrodes are divided into a plurality of groups each of which has common electrodes at a time of detecting an external proximity object,
• the closed loop winding coils are formed, in a first group among the plurality of groups, using the common electrodes which are included in a second group and a third group adjacent to the first group, at the time of detecting the external proximity object, and
• an electric field drive signal for generating the electric field is supplied via the second driving wiring to the common electrodes included in the first group to detect a change of the electric field caused by the external proximity object.