JP2004248047A - Image forming device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten user's waiting time at the time of starting electronic equipment and an image forming device the first thing in the morning by automatically shifting the statuses of the electronic equipment and the image forming device from a normal standby mode, etc., to an energy saving mode to improve the operabilities of the electronic equipment and the image forming device when lighting of an installation location of an office, etc., is turned off at night and by automatically and quickly returning the statuses of the electronic equipment and the image forming device from the energy saving mode to the normal standby mode when the installation location becomes bright next morning. <P>SOLUTION: When an illumination sensor detects that it becomes dark around to be night (N of step S1), a shift is made to the energy saving mode (step S9), and when it becomes bright around next morning, the normal standby mode is returned (step S13). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image forming apparatus and an electronic device having a power saving function.
[0002]
[Prior art]
Patent Literature 1 discloses a technology in which, in a communication device or an image forming apparatus including the communication device, power consumption in a standby state is reduced as much as possible and the device can be operated when necessary.
[0003]
Patent Document 2 discloses an image forming apparatus capable of returning from an energy saving mode to a normal mode with simple software control.
[0004]
[Patent Document 1]
JP 07-226815 A [Patent Document 2]
JP 2000-172130 A
[Problems to be solved by the invention]
In response to recent global environmental preservation activities, even in image forming apparatuses such as laser printers, if there is no request for a print job from an external host computer for a certain period of time or more, power consumption is further reduced from the normal standby state. There is known a technology for shifting to a so-called energy saving mode (hereinafter, referred to as an energy saving mode) in which the power consumption is reduced (see Patent Documents 1 and 2).
[0006]
However, in such an energy-saving mode, the installation place such as an office is turned off at night, so that the state of the image forming apparatus is quickly shifted from the standby mode to the energy-saving mode. If the state can be shifted from the energy saving mode to the standby mode, the operability of the image forming apparatus can be improved, and the waiting time of the user when starting the apparatus in the morning can be reduced, which is convenient. It is.
[0007]
In the case of an image forming apparatus having a plurality of host interfaces (hereinafter, simply referred to as I / Fs) (for example, when one apparatus has a network I / F, a centro I / F, a USB, etc.), When the forming apparatus performs printing using a means other than the main host I / F (other than the network I / F in the above example) during the energy saving mode, the transmission from the host computer returns from the energy saving mode. Since the operation is not performed automatically, the image forming apparatus is generally returned from the energy saving mode by operating the operation panel of the image forming apparatus prior to the transmission. Therefore, in the energy saving mode, it is necessary to detect the presence or absence of operation of the operation panel. Therefore, even in the energy saving mode, it is necessary to energize a necessary circuit portion of the operation panel.
[0008]
On the other hand, as the role of visually impaired people in the society is expanding, it is required to further simplify the operation of the image forming apparatus for appliances, and the operation for grasping the settings and status of the image forming apparatus is an operation. There is a need for simplification as much as possible without relying on panels.
[0009]
An object of the present invention is to automatically shift the state of an electronic apparatus and an image forming apparatus from a normal standby mode to an energy saving mode when an installation place such as an office is turned off at night, and It is to improve the operability of the forming apparatus.
[0010]
Another object of the present invention is to automatically return the state of the electronic apparatus and the image forming apparatus from the energy-saving mode to the normal standby mode or the like when the installation location becomes bright the next morning, and An object of the present invention is to reduce a user's waiting time when starting up the apparatus.
[0011]
Another object of the present invention is to eliminate the need for operation of the operation panel to return from the energy saving mode, and to return the device from the energy saving mode to a normal standby mode or the like by lightly tapping the electronic device. It is to improve the operability of the forming apparatus.
[0012]
Another object of the present invention is to make it possible to inform the user of the state of the electronic apparatus and the image forming apparatus by voice by tapping the electronic apparatus and the image forming apparatus lightly in this case, so that the visually impaired Another object of the present invention is to make it possible to handle an electronic apparatus and an image forming apparatus with a simple operation.
[0013]
[Means for Solving the Problems]
According to the first aspect of the present invention, there is provided a printer engine for forming an image on a medium, a power supply circuit for supplying power to the apparatus, an illuminance sensor for detecting a light amount of light external to the apparatus, and a light receiving amount. A first power-saving transition unit that transitions the apparatus to a power-saving state when a predetermined value is less than a predetermined value; and controls the power supply circuit when a predetermined condition is satisfied in the power-saving state. And a first return unit for returning the power from the power saving state.
[0014]
Therefore, when the place where the apparatus is installed such as an office is turned off at night, the state of the image forming apparatus can be shifted from a normal standby mode that is not in the power saving state to an energy saving mode that maintains the power saving state. Therefore, the operability of the image forming apparatus can be improved.
[0015]
According to a second aspect of the present invention, the first power-saving transition unit performs the transition on condition that a state in which the power consumption falls below the predetermined value has continued for a preset predetermined time.
[0016]
Therefore, since the mode does not shift to the energy saving mode when the room is temporarily turned off, it is possible to accurately determine that the lighting has been turned off at night and shift to the energy saving mode.
[0017]
According to a third aspect of the present invention, in the image forming apparatus according to the first or second aspect, the amount of received light is equal to or more than a predetermined value when the first power saving transition unit is in the power saving state. When the condition (2) is satisfied, a second return means for performing the return is further provided.
[0018]
Therefore, when the installation location of the image forming apparatus becomes bright in the next morning, the state of the image forming apparatus can be promptly shifted from the energy saving mode to the normal standby mode or the like. Can be reduced.
[0019]
According to a fourth aspect of the present invention, in the image forming apparatus according to the third aspect, the first return unit is below the predetermined value when in the power saving state by the first power saving transition unit. The return is performed on condition that the state has continued for a predetermined time set in advance.
[0020]
Therefore, when the indoor lighting is temporarily turned on, the mode does not shift to the energy saving mode, so that it is possible to accurately determine that morning has come and return from the energy saving mode to the normal standby mode or the like.
[0021]
According to a fifth aspect of the present invention, in the image forming apparatus according to any one of the first to fourth aspects, a vibration sensor for detecting a vibration of the image forming apparatus, and the power saving by the first power saving shifting unit. Second recovery means for performing the recovery when the vibration is detected in the state.
[0022]
Therefore, even in an image forming apparatus that does not return from the energy saving mode even when a print job is transmitted from a host computer or the like, there is no need to operate the operation panel or the like. Since it is possible to return to the normal standby mode or the like, the operability of the image forming apparatus can be improved.
[0023]
According to a sixth aspect of the present invention, in the image forming apparatus according to the fifth aspect, when the second return unit performs the return, a notification unit that notifies a user of a predetermined state of the apparatus by voice is provided. It also has more.
[0024]
Therefore, when returning from the energy saving mode, the state of the image forming apparatus (the remaining amount of the transfer paper as a medium, the remaining amount of the toner, and the jam of the transfer paper when the transfer paper is jammed) can be achieved by lightly tapping the image forming apparatus. ) Can be conveyed to the user by voice, so that the visually impaired can use the image forming apparatus with a simple operation.
[0025]
According to a seventh aspect of the present invention, in the image forming apparatus according to any one of the first to sixth aspects, when the execution of the image formation is not requested during a predetermined period, the power supply circuit is provided. And a second power-save transition means for shifting the apparatus to a power-save state by reducing the power by controlling the power-saving state. The above-mentioned return is performed also in the power state.
[0026]
Therefore, an image forming apparatus according to any one of claims 1 to 6, wherein the image forming apparatus has a function of shifting to a power saving state when there is no request for execution of image formation for a predetermined period set in advance. The same operation and effect as described above can be obtained.
[0027]
According to an eighth aspect of the present invention, in the image forming apparatus according to any one of the first to seventh aspects, the image forming apparatus further includes an image reading device that reads an image of the document, and the printer engine is configured to perform a process based on the read image of the document. To form the image.
[0028]
Therefore, the same operation and effect as those of the invention according to any one of claims 1 to 7 can be obtained.
[0029]
According to a ninth aspect of the present invention, there is provided a power supply circuit for supplying power to the apparatus, an illuminance sensor for detecting the amount of light external to the apparatus, and an illuminance sensor when the amount of received light falls below a predetermined value. First power saving transition means for shifting the device to a power saving state; and controlling the power supply circuit to return the power from the power saving state when a predetermined condition is satisfied in the power saving state. And a first return means for causing the electronic device to return.
[0030]
Therefore, when the place where the apparatus is installed such as an office is turned off at night, the state of the electronic apparatus can be shifted from a normal standby mode that is not in the power saving state to an energy saving mode that maintains the power saving state. Therefore, the operability of the electronic device can be improved.
[0031]
According to a tenth aspect of the present invention, in the electronic device according to the ninth aspect, when the amount of received light is equal to or greater than a predetermined value when the first power saving transition unit is in the power saving state. Further includes second return means for performing the return.
[0032]
Therefore, when the installation place of the device becomes bright in the next morning, the state of the electronic device can be promptly shifted from the energy saving mode to the normal standby mode, etc., and the waiting time of the user at the time of starting the device for the first time in the morning is reduced. Can be reduced.
[0033]
According to an eleventh aspect of the present invention, in the electronic device according to the ninth or tenth aspect, the power supply circuit is controlled by controlling the power supply circuit when there is no request to execute a predetermined job for a predetermined period set in advance. The power-saving mode further comprises a second power-saving transition unit that transitions the apparatus to a power-saving state by reducing the power-saving state. Also performs the return.
[0034]
Therefore, an image forming apparatus having a function of shifting to a power saving state when there is no request for execution of a predetermined job for a predetermined period set in advance, has the same operation as the invention according to claim 9 or 10. , The effect can be achieved.
[0035]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described.
[0036]
FIG. 1 is a functional block diagram illustrating an outline of a hardware configuration of an image forming apparatus 1 according to the present embodiment.
[0037]
In FIG. 1, an image forming apparatus 1 implements the electronic apparatus and the image forming apparatus of the present invention. Reference numeral 2 denotes a power supply that receives power from a commercial AC power supply 3 and supplies power to the image forming apparatus 1. Circuit. Reference numeral 5 denotes an engine board, which controls the printer engine 6. The printer engine 6 forms an image on a predetermined medium such as paper. As the printing method, in addition to the electrophotographic method, various methods such as an ink jet method, a sublimation type thermal transfer method, a silver halide photographic method, a direct thermal recording method, and a fusion type thermal transfer method can be applied.
[0038]
Reference numeral 7 denotes a controller board, which includes a microcomputer or the like, and converts the image data received from a host computer (not shown) into actual print data and transfers the data to the engine board 5. Take control of the whole.
[0039]
Reference numeral 8 denotes a network interface (I / F) board, which is a communication interface for communicating with a local area network (LAN) 9. A print job from a host computer (not shown) is also received via the network I / F board 8.
[0040]
Reference numeral 10 denotes an operation unit that includes various keyboards and a liquid crystal panel, receives various operations from the user, and notifies the user of various messages.
[0041]
Reference numeral 11 denotes a converter (AC-DC converter) inside the power supply unit 4, which converts an AC input from the primary commercial AC power supply 3 and outputs a DC to the secondary side. This DC output is output from three systems of DC outputs a, b, and c.
[0042]
Reference numeral 12 denotes an FET transistor serving as a switching element. The DC output a of the converter 11 can be switched between output and non-output from the power supply unit 4 by turning on / off the FET transistor 12. Reference numeral 13 also denotes an FET transistor serving as a switching element. By turning on / off the FET transistor 13, the DC output b of the converter 11 can be switched between output and non-output from the power supply unit 4.
[0043]
Reference numeral 14 denotes a control unit, which is configured by a microcomputer or the like, and controls the network I / F board 8, controls the FET transistors 12, 13, and performs detection by a vibration sensor 17 and an illuminance sensor 18, which will be described later.
[0044]
Reference numeral 15 denotes a signal line for controlling ON / OFF of the FET transistor 12, and outputs a control signal from the control unit 14 to the FET transistor 12 of the power supply unit 4 via the controller board 7 and the engine board 5. Reference numeral 16 also denotes a signal line for controlling ON / OFF of the FET transistor 12, and outputs a control signal from the control unit 14 to the FET transistor 13 of the power supply unit 4 via the controller board 7 and the engine board 5.
[0045]
Reference numeral 17 denotes a vibration sensor, and when vibration is applied to the image forming apparatus 1, the vibration is detected and transmitted to the control unit 14.
[0046]
Reference numeral 18 denotes an illuminance sensor. When light is irradiated on the sensor 18, the illuminance is detected and transmitted to the control unit 14.
[0047]
Reference numeral 19 denotes a speech synthesis circuit, the control of which is performed by the control unit 14.
[0048]
The DC output a is supplied to the engine board 5 through the FET transistor 12 for driving the mechatronics. The supply / non-supply is performed by the control unit 14 of the network I / F board 8 as described above. Is determined by controlling The DC output a is +24 V in this example.
[0049]
The DC output b is supplied to the engine board 5, the controller board 7, and the operation panel 10 through the FET transistor 13 for driving the logic circuit. The supply / non-supply is performed by the control unit 14 as described above. It is determined by controlling the transistor 13. The DC output b is + 5V in this example.
[0050]
The DC output c is supplied to the network I / F board 8 for driving the control unit 14, and its supply / non-supply is not controlled, and the image forming apparatus 1 is connected to the commercial AC power supply 3. Is always supplied to the control unit 14. The DC output c is + 5V in this example.
[0051]
The image forming apparatus 1 may include a scanner that reads an image of a document, and may be configured as a copying machine that forms an image with the printer engine 6 based on the read image.
[0052]
The image forming apparatus 1 can be operated in a so-called energy saving mode that saves power consumption. That is, in the energy saving mode, the control unit 14 can turn off the FETs 12 and 13 so as to cut off the power supply to all the units other than the control unit 14 itself, and when returning from the energy saving mode. By turning on the FET transistors 12 and 13, it is possible to restart all energization except for the control unit 14 itself.
[0053]
Next, details of a process executed by the control unit 14 based on a predetermined control program will be described with reference to a flowchart of FIG.
[0054]
The process of FIG. 2 is a flowchart of a routine for performing the energy saving mode control, and the control unit 14 jumps the control from the normal main routine to the routine of FIG. 2 at regular intervals.
[0055]
In the process of FIG. 2, first, the control unit 14 determines whether or not the amount of light detected by the illuminance sensor 18 is equal to or greater than a preset value (step S1). If the value is equal to or greater than the set value (Y in step S1), the process proceeds to step S2. If the value is equal to or less than the set value (N in step S1), the present routine is terminated and control is returned to the main routine. Perform a standby operation.
[0056]
In step S2, the control unit 14 queries the controller board 7 to confirm whether or not the image forming apparatus 1 should shift to the energy saving mode. Specifically, the controller board 7 determines that the mode should be shifted to the energy saving mode when a print job is not received from an external host computer for a predetermined time or more. If the answer from the controller board 7 indicates that the mode should not be shifted to the energy saving mode (N in step S2), the present routine is ended, the control is returned to the main routine, and a normal standby operation is performed.
[0057]
If the answer from the controller board 7 is that the mode should be shifted to the energy saving mode (Y in step S2), the control unit 14 turns off the FET transistors 12 and 13 and all the components other than the control unit 14 themselves. Turn off the power. Accordingly, the image forming apparatus 1 shifts to the energy saving mode from this point, and implements the second power saving and subsequent units (step S3).
[0058]
After shifting to the energy saving mode (step S3), the control unit 14 detects the vibration applied to the image forming apparatus 1 by the vibration sensor 17 (Y in step S4), or prints a print job from the host computer (not shown) via the LAN9. Unless an interrupt is generated due to the reception of (NO in step S5), the energy saving mode (step S3) is maintained by the loop of N in step S5.
[0059]
The control unit 14 detects the vibration (Y in step S4) or, when an interrupt 21 occurs, turns on the FET transistors 12 and 13 to realize the second return unit (step S5). Power supply is resumed for all parts other than itself, and the system returns from the energy saving mode. In this case, the voice synthesizing circuit 19 announces the status of the image forming apparatus 1 to the user by voice via the controller board 7 and notifies the user of the status by using the voice (step S6). The content of the announcement is basically based on the content displayed on the display of the operation panel 10. However, a simple and well-scrutinized voice message with a simple and well-examined content so that the user can easily understand the content simply by listening to it. I do. This allows the user to easily recognize that the image forming apparatus 1 has returned from the energy saving mode. Thereafter, the control is returned to the main routine, and the routine shifts to a normal standby operation.
[0060]
When it is determined in step S1 that the amount of light received by the illuminance sensor 17 is equal to or less than the set value (N in step S1), the control unit 14 counts a predetermined counter by +1 (step S7), and When has reached the preset number of times (Y in step S8), that is, when it is not determined that the received light amount is equal to or more than the set value before the number of times reaches the preset number (N in step S1), The process proceeds to step S9 to implement a first power saving shifting unit. That is, by repeating the loop of N in step S8, it is determined whether or not the time during which the image forming apparatus 1 has not been irradiated with light has reached a predetermined time or more.
[0061]
The case where the process proceeds to step S9 is a case where it is determined in step S8 that the time during which light does not hit the image forming apparatus 1 is longer than a certain time, and therefore, the control unit 14 controls the FET transistors 12 and 13 When the power is turned off (step S9), the power supply to all the units other than the control unit 14 is cut off, and the image forming apparatus 1 shifts to the energy saving mode from this point.
[0062]
Thereafter, it is determined whether or not the amount of light received by the illuminance sensor 18 is equal to or greater than a preset value (step S10). If it is equal to or greater than the set value (Y in step S10), a predetermined counter is counted by +1 (step S11). If the count value reaches a preset number of times (Y in step S12). That is, if it is not determined that the amount of received light falls below the set value before the set number of times is reached (N in step S10), the process proceeds to step S13. That is, by repeating the loop of N in step S12, it is determined whether or not the time during which light is shining on the image forming apparatus 1 is equal to or longer than a predetermined time.
[0063]
The control shifts to step S13 because it is determined that the time during which light is applied to the image forming apparatus 1 is equal to or longer than a predetermined time. Restarts the energization of all units except the control unit 14 itself, the image forming apparatus 1 returns from the energy saving mode at this point, and thereafter returns to the main routine to shift to the normal standby operation. Step S13 implements first return means.
[0064]
Here, regarding the processing in the interrupt mask 22 indicated by the broken line, even if the vibration is detected by the vibration sensor 17, the interrupt 21 does not occur, and the processing simply flows through each step inside the interrupt mask 22. However, if the process is running through the other steps (steps S1 to S6), an interrupt 21 is generated when it is detected that vibration has been applied to the image forming apparatus 1, and the process proceeds to the broken line portion 23. The process jumps and executes the processing from step S4. Then, even if the image forming apparatus 1 is in the energy saving mode at that time, the image forming apparatus 1 is returned from the energy saving mode (step S5), and the status of the apparatus at that time is notified to the user by voice (step S5). S6).
[0065]
The present invention can be applied not only to the image forming apparatus such as the above-described image forming apparatus 1 but also to various electronic devices that can communicate with the outside.
[0066]
【The invention's effect】
According to the first aspect of the present invention, when the installation location of the apparatus such as an office is turned off at night, the state of the image forming apparatus is maintained in a power saving state from a normal standby mode that is not in the power saving state. Since the mode can be shifted to the energy saving mode, the operability of the image forming apparatus can be improved.
[0067]
According to the second aspect of the present invention, in the first aspect of the present invention, when the room is temporarily turned off, the mode does not shift to the energy saving mode. The mode can be shifted to the energy saving mode.
[0068]
According to a third aspect of the present invention, in the first or second aspect of the present invention, when the installation location of the apparatus becomes bright the next morning, the state of the image forming apparatus is immediately shifted from the energy saving mode to a normal standby mode or the like. This makes it possible to reduce the user's waiting time when the apparatus is started up for the first time in the morning.
[0069]
According to a fourth aspect of the present invention, in the third aspect of the present invention, the mode does not shift to the energy saving mode when the indoor lighting is temporarily turned on. It is possible to return from the normal standby mode or the like from the mode.
[0070]
The invention described in claim 5 does not require operation of the operation panel and the like even in an image forming apparatus which does not return from the energy saving mode even when a print job is transmitted from a host computer or the like. By hitting, it is possible to return from the energy saving mode to the normal standby mode or the like, so that the operability of the image forming apparatus can be improved.
[0071]
According to a sixth aspect of the present invention, in the fifth aspect of the invention, when returning from the energy-saving mode, the image forming apparatus is lightly hit, for example, by tapping the image forming apparatus (the remaining amount of the transfer paper as a medium). , The remaining amount of toner, the location of the jam if the transfer paper has jammed, etc.) can be conveyed to the user by voice, so that a visually impaired person can use the image forming apparatus with a simple operation. be able to.
[0072]
According to a seventh aspect of the present invention, in the invention according to any one of the first to sixth aspects, the image forming apparatus shifts to a power saving state when there is no request to execute image formation for a predetermined period set in advance. With respect to the image forming apparatus having the function, the same operation and effect as the invention according to any one of claims 1 to 6 can be obtained.
[0073]
The invention according to claim 8 has the same operation and effect as the invention according to any one of claims 1 to 7.
[0074]
According to a ninth aspect of the present invention, when the installation location of the apparatus such as an office is turned off at night, the state of the electronic apparatus is changed from a normal standby mode that is not in the power saving state to the power saving state. Since the mode can be shifted, the operability of the electronic device can be improved.
[0075]
According to a tenth aspect of the present invention, when the installation location of the device becomes bright the next morning, the state of the electronic device can be immediately shifted from the energy saving mode to a normal standby mode or the like. In addition, it is possible to reduce the user's waiting time at the time of starting the apparatus for the first time in the morning.
[0076]
According to an eleventh aspect of the present invention, in the invention of the ninth or tenth aspect, there is provided a function of shifting to a power saving state when there is no request to execute a predetermined job within a predetermined period set in advance. With regard to the electronic device, the same operation and effect as the invention according to claim 9 or 10 can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram of electrical connection of an image forming apparatus according to an embodiment of the present invention.
FIG. 2 is a flowchart of a process executed by the image forming apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Image forming apparatus, electronic device 2 Power supply circuit 6 Printer engine 17 Vibration sensor 18 Illumination sensor

Claims (11)

A printer engine for forming an image on a medium,
A power supply circuit for supplying power to the device,
An illuminance sensor for detecting the amount of light outside the device,
A first power-saving transition unit that transitions the apparatus to a power-saving state when the amount of received light falls below a predetermined value;
A first return unit that controls the power supply circuit to return the power from the power saving state when a predetermined condition is satisfied while in the power saving state;
An image forming apparatus comprising: 2. The image forming apparatus according to claim 1, wherein the first power saving transition unit performs the transition on condition that the state below the predetermined value has continued for a preset predetermined time. 3. 2. The image forming apparatus according to claim 1, further comprising: a second return unit configured to perform the return when the received light amount becomes equal to or more than a predetermined value when the first power saving transition unit is in the power saving state. Or the image forming apparatus according to 2. The first return unit performs the return on condition that the state below the predetermined value has been continued for a predetermined period of time when the first power saving transition unit is in the power saving state. The image forming apparatus according to claim 3. A vibration sensor for detecting vibration of the device,
A second return unit that performs the return when the vibration is detected while in the power save state by the first power save transition unit;
The image forming apparatus according to claim 1, further comprising: The image forming apparatus according to claim 5, further comprising a notifying unit that notifies a user of a predetermined state of the apparatus by voice when the return is performed by the second returning unit. A second power-saving shifting unit that shifts the apparatus to a power-saving state by controlling the power supply circuit to reduce the power when there is no request for execution of the image forming for a predetermined period of time; Further comprising
The first return unit performs the return even when in the power saving state by the second power saving transition unit;
The image forming apparatus according to claim 1. Further comprising an image reading device for reading the image of the document,
The printer engine forms the image based on the read image of the document,
The image forming apparatus according to claim 1. A power supply circuit for supplying power to the device,
An illuminance sensor for detecting the amount of light outside the device,
A first power-saving transition unit that transitions the apparatus to a power-saving state when the amount of received light falls below a predetermined value;
A first return unit that controls the power supply circuit to return the power from the power saving state when a predetermined condition is satisfied while in the power saving state;
An electronic device comprising: 10. The image forming apparatus according to claim 9, further comprising: a second return unit that performs the return when the received light amount becomes equal to or more than a predetermined value when the first power saving unit is in the power saving state. An electronic device according to claim 1. A second power-saving shifting unit that shifts the apparatus to a power-saving state by controlling the power supply circuit to reduce the power when there is no request to execute a predetermined job during a predetermined period of time; Further comprising
The first return unit performs the return even when in the power saving state by the second power saving transition unit;
The image forming apparatus according to claim 9.

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