Image reading apparatus, control apparatus and method, and computer readable medium storing program for implementing a power saving technique

摘要

An image reading apparatus used for an image forming apparatus that is coupled therewith and that has a main controller which performs control of the image forming apparatus includes an image reading unit, a detector, and a communication controller. The image reading unit reads an image formed on a document. The detector detects a state of the image reading unit. The communication controller connects to the main controller, the detector, and a communication line. 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. The detector transmits a detection signal to the communication controller in the first operating state, and transmits the detection signal to the main controller in the second operating state.

主权项

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.