Patent ID: 8495401
Filing Date: 2013-07-23
Classification: G03G,G06F,H04N,Y02D

Abstract:
1. An image forming apparatus, comprising: an imaging forming unit configured to form an image; a main controller configured to control an operation of the imaging forming unit; a universal serial bus (USB) interface configured to receive and to transmit USB data from and to a host apparatus; a power supply configured to supply power to the image forming unit and the main controller; a switch configured to selectively supply power to various elements of the image forming apparatus based upon a control signal of the main controller; and a sub-controller configured to output a power control signal for turning on the switch in response to USB data received from the host apparatus being a pre-setting data having a predetermined value when the image forming apparatus is in a sleep mode, wherein the sleep mode comprises a power mode during which the main controller is turned off, wherein the main controller is configured to maintain an on state of the switch even if the power control signal output by the sub-controller changes after a change in a power state of the main controller from the sleep mode to a normal mode.