Elektrofotografisches Druck- oder Kopiergerät mit Energiesparfunktion

摘要

An energy saving image forming apparatus and a control method therefor may be automatically activated when a user does not use the image forming apparatus for a predetermined period of time, by thereafter initiating a primary energy saving mode where power to a primary energy saving circuit portion of the apparatus is turned off. The primary energy saving circuit portion includes components within the apparatus that consume large amounts of energy, namely the heat lamp and ventilating fan. The secondary energy saving circuit portion includes components within the apparatus other than those included in the primary energy saving circuit portion. To achieve even greater energy savings, a secondary energy saving mode is established in response to a user input. During the secondary energy saving mode, power to the primary energy saving circuit portion and a secondary energy saving circuit portion is turned off. While in the secondary energy saving mode, a reactivation key may be entered by the user. Entry of the reactivation key initiates a warm-up operation to bring the apparatus to a print ready state. The apparatus and method may be widely applied in many types of image forming apparatuses to prevent unnecessary power consumption.