Patent ID: 9091984
Filing Date: 2015-07-28
Classification: G03G,H04N

Abstract:
1. An image forming apparatus comprising: an apparatus body that implements a plurality of functions in accordance with operations requested by a user by using an operation unit, the plurality of functions including an image reading function of reading an image of a document, an image information provided for the user; a controller that controls a first power state, a second power state, and a third power state, the first power state being a state in which one of the plurality of functions is being performed, the second power state being a state in which one of the plurality of functions is ready to be performed, the third power state being a state in which there is no power to perform any of the plurality of functions or the third power state being a state in which power is lower than power in the first power state or the second power state; an obtaining unit that obtains information concerning paper to be supplied when the image forming function is implemented in the apparatus body; a first control unit that controls the plurality of functions so that, when the plurality of functions are to be returned from the third power state to the second power state, the display function is returned to the second power state without being synchronized with the functions other than the display function and an operation requested by the user by using the operation unit of the apparatus body is received before the functions other than the display function are returned to the second power state; and a second control unit that controls the functions other than the display function so that, if the image forming function is required for executing an operation which has been requested by the user by using the operation unit and which has been received under the control of the first control unit, the operation is executed after the obtaining unit obtains the information concerning paper, wherein the second control unit performs control so that, if the image forming function is not required for executing an operation which has been requested by the user by using the operation unit and which has been received under the control of the first control unit, the operation is executed without waiting for the information concerning paper to be obtained by the obtaining unit, wherein the second control unit performs control so that, when a document is to be copied by the image reading function and the image forming function of the plurality of functions, the image reading function does not shift to the first power state until the information concerning paper is obtained by the obtaining unit, wherein the information concerning paper comprises size information about the paper, and wherein when the operation which has been requested by the user by using the operation unit is not scanning, fax sending or copying, the first control unit performs control so that the operation is not started until the information concerning paper is obtained by the obtaining unit.