Patent ID: 9083835
Filing Date: 2015-07-14
Classification: H04N

Abstract:
1. An image reading apparatus used for an image forming apparatus (i) that is coupled to the image reading apparatus and (ii) that has a main controller which performs control of the image forming apparatus, the image reading apparatus comprising: an image reading unit configured to read an image formed on a document; a detector configured to detect a state of the image reading unit and configured to generate a detection signal in response to the detected state of the image reading unit; and a communication controller configured to connect to the main controller of the image forming apparatus, the detector, and a communication line, wherein power is supplied to the detector and the communication controller in both a first operating state, in which supply of power to the main controller is stopped, and a second operating state, in which power is supplied to the main controller, wherein the detector is configured to transmit the detection signal to the communication controller in the first operating state, and configured to transmit the detection signal to the main controller in the second operating state without using the communication controller as an intermediary, and wherein the detection signal is not transmitted to the communication controller in the second operating state.