Image pickup device, display-and-image-pickup device, electronic apparatus and method of detecting an object

Abstract

An image pickup device capable of stably detecting an object irrespective of use conditions while reducing manufacturing costs is provided. When illumination light from a backlightis emitted to a proximity object from an I/O display panel, an electric charge for charging is accumulated in each of image pickup pixelsin accordance with total light amount as a summation of reflected light Lon originating from the illumination light and environment light (outside light) L. Moreover, when the above-described illumination light is not emitted, an electric charge for discharging is released from each of the image pickup pixelsin accordance with light amount of the environment light L. Thereby, a component by the environment light Lis subtracted in an image pickup signal obtained from each of the image pickup pixels, so object information about the proximity object is obtainable without influence of the environment light L. Moreover, in a light reception drive circuit, a smaller number of necessary frame memoriesA for producing a picked-up image from the image pickup signal than that in related art are necessary.