Patent ID: 9025169
Filing Date: 2015-05-05
Classification: G03G,G06K

Abstract:
1. An image forming apparatus, comprising: a power receiving unit for receiving an external power-supply voltage; a power supply unit for generating a predetermined operational power-supply voltage based on the power-supply voltage received by the power receiving unit, the power supply unit having an electricity storage portion to continue supplying the operational power-supply voltage for a brief power maintenance period after the external power-supply voltage is cut off; an image forming unit for forming an image on a sheet; a switching command receiving unit for receiving a switching command which commands switching between an execution mode where an image forming command which commands image formation by the image forming unit is allowed to be received and a standby mode where the image forming command is not received; a nonvolatile storage unit for storing start mode information which indicates a mode of either the standby mode or the execution mode to be executed upon start-up; an execution control unit which runs with the operational power-supply voltage and selectively executes the execution mode and the standby mode as well as controls the storage unit; and a power shutdown detection unit for detecting that the power-supply voltage has been cut off, wherein the execution control unit: is started when supply of the operational power-supply voltage is started and executes a mode which is indicated by the start mode information stored in the storage unit; executes the execution mode when the switching command is received by the switching command receiving unit during execution of the standby mode; executes the standby mode when the switching command is received by the switching command receiving unit during execution of the execution mode; causes the storage unit not to store information indicating the standby mode as the start mode information if the power shutdown detection unit detects that the power-supply voltage has been cut off when the standby mode is started and even if the switching command receiving unit receives the switching command during the brief power maintenance period after the detection of the cutting off, and causes the storage unit to store information indicating the standby mode as the start mode information if the power shutdown detection unit does not detect that the power-supply voltage has been cut off when the standby mode is started; and causes the storage unit not to store information indicating the execution mode as the start mode information if the power shutdown detection unit detects that the power-supply voltage has been cut off when the execution mode is started and even if the switching command receiving unit receives the switching command during the brief power maintenance period after the detection of the cutting off, and causes the storage unit to store information indicating the execution mode as the start mode information if the power shutdown detection unit does not detect that the power-supply voltage has been cut off when the execution mode is started.