JP4546782B2 - Equipment with energy saving mode - Google Patents

Description

  The present invention relates to an apparatus having an energy saving mode (energy saving mode), for example, an image forming apparatus such as a copying machine or a printer.

In a device having an energy saving mode in which the normal circuit power source VS is turned off and the operation by the energy saving mode power source VE is enabled, various sensor inputs are required as device operation requests during the energy saving mode. Examples of this include pressing the return switch, turning on the document set detection sensor, and the like. In many cases, a filter circuit for noise removal is provided at an input port that detects this recovery factor. This is to prevent malfunction due to noise or the like. As a related technique, for example, there is one shown in Patent Document 1.
JP 08-254922 A

It is difficult to insert a filter circuit with strong characteristics because it is necessary to quickly process information from the input port during normal operation. Inserts a filter circuit that is weaker than necessary for normal use. Therefore, there is a problem that malfunction due to noise occurs.
An object of this invention is to provide the apparatus which has an energy saving mode which can prevent the malfunctioning by the noise of a sensor input during an energy saving mode.

To achieve the above object, the present invention turns off the normal circuit power, the apparatus having energy-saving mode that allows operation by the energy-saving mode for power, first of engaging and disengaging the power supply the normal circuit A power connection / disconnection means, a return factor detection sensor, an energy saving mode control section for inputting information from the return factor detection sensor and controlling the power connection / disconnection means to connect / disconnect in an energy saving mode; and the return factor sensor; Provided between the energy-saving mode control units, two resistors and second power connection / disconnection means connected to one of the two resistors, and two capacitors and one of the two capacitors A third power supply connecting / disconnecting means, wherein the energy saving mode control unit conducts the second power supply connecting / disconnecting means when information from the return factor sensor is input in the energy saving mode. Said third power supply disconnection device conducts, and controls the time constant obtained by the two resistors and two capacitors.

  In the present invention, in a device having an energy saving mode in which the normal circuit power source VS is turned off and the operation by the energy saving mode power source VE is enabled, a power connection / disconnection means for connecting / disconnecting the normal circuit power source VS, a return factor detection sensor, It has an energy saving mode control unit that inputs and outputs information from the return factor detection sensor and controls the power connection / disconnection means to connect / disconnect the energy saving mode, and the resistance of the RC filter circuit inserted in the previous stage of the energy saving mode control unit is variable Alternatively, the intended purpose can be achieved by switching the time constant by changing the capacitance of the capacitor.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a block diagram of an image forming apparatus according to an embodiment of the present invention. The apparatus includes a CPU 1, a ROM 2, a RAM 3, an image memory 4, an image processing unit 5, an operation unit 6, an electrical control unit 7, a power supply 8, and an energy saving mode control unit (energy saving mode control unit) 9 that control the entire apparatus. .
The electrical control unit 7 performs general I / F of mechanical control control of electrical components built in the apparatus. The power source 8 converts the AC input power source into a DC power source used inside the apparatus, and outputs various power sources (normal circuit power source VS, energy saving mode power source VE). The energy saving mode control unit 9 performs control during the energy saving mode.
FIG. 2 is an energy saving mode block diagram. The energy saving mode power source VE is supplied to the energy saving mode on block 10 and the energy saving mode control unit 9. The normal circuit power supply VS is turned on / off from the energy saving mode power supply VE by the FET (1) 11 and supplied to the energy saving mode off block 12. Information from the return factor detection sensor 13 is input to the energy saving mode control unit 9, and the FET (1) 11 is controlled using this as a return factor to turn on / off the energy saving mode.
FIG. 3 is a block diagram of return factor detection. Information from the return factor detection sensor 13 is input to the energy saving mode control unit 9 through an RC filter circuit including a resistor (1) 14, a resistor (2) 15, a capacitor (1) 17, and a capacitor (2) 18. The resistor (1) 14 is controlled by the FET (2) 16 and performs control not to conduct the FET (2) in the energy saving mode (time constant increases).
Further, the capacitor (1) 17 is controlled by the FET (3) 19 and performs control for conducting the FET (3) 19 in the energy saving mode (the time constant is increased).
FIG. 4 is a flowchart showing a first processing example. In the energy saving mode (Y in S1), control is performed to increase the time constant of the filter circuit (S2).
FIG. 5 is a flowchart showing a second processing example. In the energy saving mode (Y in S11), the FET (2) 16 is controlled to be turned off (S2).
FIG. 6 is a flowchart showing a third processing example. In the energy saving mode (Y in S21), control to turn on the FET (3) 19 is performed (S22).

1 is a block diagram of an image forming apparatus according to an embodiment of the present invention. Energy saving mode block diagram. Return factor detection block diagram. The flowchart which shows the 1st process example. The flowchart which shows the 2nd process example. The flowchart which shows the 3rd processing example.

Explanation of symbols

9 Energy-saving mode control unit, 11 FET (1) (on / off means), 13 Return factor detection sensor

Claims (1)

In equipment with energy saving mode that normally turns off the circuit power supply and enables operation with power supply for energy saving mode,
First power connection / disconnection means for connecting / disconnecting the normal circuit power supply;
A return factor detection sensor;
An energy saving mode control unit that inputs information from the return factor detection sensor and controls the power connection / disconnection means to connect / disconnect the energy saving mode;
A second power source connecting / disconnecting means provided between the return factor sensor and the energy saving mode control unit and connected to any one of the two resistors, and two capacitors and the two capacitors; A third power connection / disconnection means connected to any one of them;
With
The energy saving mode control unit conducts the third power connection / disconnection unit without conducting the second power connection / disconnection unit when information from the return factor sensor is input in the energy saving mode, An apparatus having an energy saving mode characterized by controlling a time constant obtained by two resistors and two capacitors .

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