1. An image display system comprising: a motion detector which is mounted in an apparatus and which senses a movement of the apparatus; an image sensor which performs an image pickup of an object, and converts the image into an image signal; an image sensor controller which receives a movement signal from the motion detector and controls activation of the image sensor according to amount of the movement of the apparatus; an image signal processor which performs image processing for the image signal and generates an image; and a display unit which displays the image.