IMAGE FORMING APPARATUS AND POWER MODE DISPLAY METHOD

摘要

Provided is an image forming apparatus that stops voltage supply to a display unit and a display control unit in a sleep mode and enables users to recognize a current power mode, with a simple structure. An image forming apparatus includes an operation unit, a main body control unit, and a power supply unit capable of supplying n voltages. The main body control unit includes a switching unit for switching to one of power modes including a ready mode in which n voltages are supplied, and p (n−m≧p≧1) sleep modes in which m voltages are not supplied, and one to n-m voltages are supplied. The operation unit includes light emitting elements, n power receiving units for respectively receiving the n voltages, and a light switching circuit for switching between supply and non-supply of the voltage to the light emitting element in accordance with a total number of the received voltages.

主权项

1. An image forming apparatus comprising:
an operation unit including a display unit and a display control unit configured to control information display on the display unit; an image forming unit configured to form an image on a paper sheet; a main body control unit configured to control operations of the image forming unit and the operation unit; and a power supply unit capable of individually supplying two or more, i.e., n voltages, wherein the main body control unit includes a switching unit configured to switch a power mode of the image forming apparatus to one of power modes including a ready mode in which the power supply unit supplies the n voltages, and one or more to n-m or less, i.e., p sleep modes in which the power supply unit does not supply the one or more and less than n, i.e., m voltages used by the display unit and the display control unit when the power mode is the ready mode while the power supply unit supplies one or more to n-m or less different number of voltages, and the operation unit includes a light emitting element, n power receiving units configured to respectively receive the n voltages, and a light switching circuit configured to switch between supply and stop of the received voltage to the light emitting element in accordance with a total number of the voltages received by the n power receiving units.