Patent ID: 9143647
Filing Date: 2015-09-22
Classification: H04N

Abstract:
1. An image reading apparatus comprising: a document cover; a cover state detector configured to detect whether the document cover is open or closed; an image reading unit configured to read an image of a target object by conducting an optical scan that moves a scanning body with a mounted light source, detecting reflected light from the target object with a photoelectric transducer, and outputting a signal expressing the detected pixel densities; a white reference plate configured as a reference for correcting an image; a power manager configured to switch between a power-saving state and a standby state in which more power is supplied to the image reading apparatus than in the power-saving state; and a controller configured to control the image reading apparatus to restore the standby state, wherein the controller is configured to, in response to the standby state being restored in response to detecting opening or closing of the document cover, control the image reading apparatus to read an image of a document to detect a document size, and after the detection of document size, read an image of the white reference plate to acquire correction values, wherein the controller is configured to control the image reading apparatus such that, in response to switching to the power-saving state while the document cover is in an open state, the scanning body is moved to a document reading position before switching to the power-saving state, and wherein the controller is also configured to control the image reading apparatus such that, in response to switching to the power-saving state while the document cover is in a closed state, the scanning body is moved to and stopped at a position directly under the white reference plate before switching to the power-saving state.