Imaging device, the display-and-image-pickup device and an electronic apparatus

Provided is an image pickup device with which object detection can be performed with a good stability no matter in what use conditions. A display area 21 of an I/O display panel 20 is provided therein with a plurality of main sensors 32 each including, as a photosensitive wavelength region, a wavelength region ”»23 of detection light for use to detect any proximity object, and a plurality of auxiliary sensors 33 whose photosensitivity in the wavelength region of the detection light is lower than photosensitivity of the main sensors 32. Moreover, with use of a composite image F derived based on a differential image MC obtained by the main sensors 32 and a differential image HC obtained by the auxiliary sensors 33, object information about the proximity object is acquired. Accordingly, even when the proximity object is moving on the display area 21 of the I/O display panel 20, for example, any false signal can be prevented from being generated in the composite image F.