Patent ID: 9354688
Filing Date: 2016-05-31
CPC Classification: G03G,G06F,G06K,H04N,Y02D

Claim Text:
1. An image forming apparatus comprising: a monitoring part monitoring occurrence of sleep-cancelling events, each sleep-cancelling event requesting cancellation of a sleep mode and recovery to a standby mode and specifying a sleep-cancellation time at which the sleep mode is to be cancelled, the sleep mode being a mode in which an image formation operation is not executable, and the standby mode being a mode in which the image formation operation is executable; a storage part, when a sleep-cancelling event occurs, storing an identifier of the sleep-cancelling event and a sleep-cancellation time specified by the sleep-cancelling event; a calculation part, when (i) a sleep-triggering event specifying a start time at which the sleep mode is to be started occurs while the image forming apparatus is in the standby mode and (ii) one or more sleep-cancelling events specifying sleep-cancellation times later than the start time have been stored in the storage part, calculating an amount of power consumption required to maintain the standby mode for a period from the start time to the earliest one of the sleep-cancellation times, thereby obtaining a power-saving amount savable during the period, and calculating a recovery power amount required for recovery from the sleep mode to the standby mode on an assumption that the sleep mode is started at the start time and is cancelled at the earliest sleep-cancellation time; and wherein the calculation part includes: