DETECTION DEVICE

A detection device performs detection of proximity of an object to a display device. The display device includes a common electrode group including a plurality of common electrodes that are arranged in a matrix and used for both image display and touch detection. The common electrode group includes a first group that includes a plurality of common electrodes and also includes a second group that includes a plurality of common electrodes different from those of the first group. A drive circuit supplies a drive signal to a plurality of common electrodes included in the first group. A detection circuit performs detection of proximity of an object to the display device, based on a detection signal received from a plurality of common electrodes included in the second group.