Image forming apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorYoung Hwa Song
Life of this patent
Estimating the term…
Abstract
An image forming apparatus to effectively reduce power consumption of an image forming apparatus in a sleep mode by reducing current consumed in an operating panel microcomputer by operating parts by constituting the parts so that a power voltage is continually supplied to the parts to indicate that the image forming apparatus is in a power-on state while stopping the operation of the operating panel microcomputer of an operating panel part in a sleep mode.
Claims15
An image forming apparatus having an operating panel part to display a screen for input of a command from a user and to receive the command from the user, the image forming apparatus comprising:
- a central processing unit (CPU) to control an operation of the image forming apparatus;
- and
- an operating panel microcomputer provided in the operating panel part, the microcomputer receiving a reset signal input from the CPU,
- wherein the CPU changes a voltage level of the reset signal input to the operating panel microcomputer to stop an operation of the operating panel microcomputer in a sleep mode.
An image forming apparatus having an operating panel part to display a screen for input of a command from a user and receives the command from the user, the image forming apparatus comprising:
- a central processing unit (CPU) to control an operation of the image forming apparatus;
- an operating panel microcomputer provided in the operating panel part, the microcomputer to receive a reset signal from the CPU;
- a display unit to display a screen to receive a command from the user;
- and
- a first switching unit to be turned on or off to supply an operating voltage to the display unit and the operating panel microcomputer,
- wherein the CPU changes a voltage level of the reset signal, the reset signal being input in the operating panel microcomputer to stop an operation of the operating panel microcomputer in a sleep mode, and
- wherein the first switching unit is turned off by the reset signal of the changed voltage level.
A power control circuit to control power supply to an operating panel part of an image forming apparatus, the power control circuit comprising:
- an input unit to receive an input of various sets of information to execute tasks of the image forming apparatus and to transmit information to an operating panel (OPE) microcomputer of the operating panel part;
- a first switching unit to be turned on and off by a switching signal of the OPE microcomputer;
- and
- a power LED to indicate that power of the image forming apparatus is at a power-on state to distinguish between a sleep mode and a power-off mode,
- wherein a VCC power is supplied to the power LED when the first switching unit is at a power-on state and the VCC power supply to the power LED is blocked when the first switching unit is at a power-off state.
Dependencies are inferred from the claim text.