Patent ID: 8159594

Claim:
An electronic device, comprising: an image-capturing device that captures an image of a subject in an image-capturing range and outputs an image signal; a projector device that projects a projection image in a projection range on a screen that is remote from a body, the projection image corresponding to a projection image data formed by an optical image formation element, the projector device and the image-capturing device being housed integrally within the body; a range change unit that changes at least one of a size of the image-capturing range and a size of the projection range during the projector device projecting the projection image, so that the image-capturing range of the image-capturing device and the projection range of the projector device do not coincide with one another; a calculation unit that calculates an amount of change of the image signal with time, by using an image signal output from an image signal extraction range corresponding to the image of the subject excluding the projection range; and a correction unit that corrects a position of the projection image according to the calculated amount of change in order to correct a vibration of the projection image; wherein if the amount of change cannot be calculated by the calculation unit, the calculation unit widens the image signal extraction range so as to calculate the amount of change by using the widened image signal extraction range.