JP2020147044A - Printer, and printer control method - Google Patents

Abstract

To make it possible to transit to a fourth power state on the basis of a time set in time measurement means even when transiting from a third power state to a second power state.SOLUTION: A printer, which has first to fourth power states, comprises: power source control means which transits a power state of the printer (1) from the third power state to the fourth power state on the basis of a time set in time measurement means, (2) from the third power state to the second power state on the basis of a first transition factor, and (3) from the third power state to the first power state on the basis of a second transition factor; and control means which prohibits that the printer transits to the fourth power state on the basis of the time set in the time measurement means when the printer transits from the third power state to the first power state. The control means does not prohibit that the printer transits to the fourth power state on the basis of the time set in the time measurement means when the printer transits from the third power state to the second power state on the basis of the first transition factor.SELECTED DRAWING: Figure 9

Description

The present invention relates to a printing device having a plurality of power states, a control method for the printing device, and the like.

Conventionally, a technique for suppressing power consumption has been proposed in an information processing device such as an MFP (Multifunction Peripheral) or a printer connected to a network. As a technique for suppressing power consumption, a technique for shifting the information processing device to a low power consumption state is known when the information processing device is not operated continuously for a certain period of time. In addition, in order to further reduce power consumption from the low power consumption state, the power of the information processing device is automatically turned off when the information processing device in the low power consumption state is not continuously operated for a certain period of time (shutdown transition time). A technique for information processing (hereinafter referred to as an auto shutdown function) is also known (see Patent Document 1).

Japanese Unexamined Patent Publication No. 08-076653

In the above-mentioned low power consumption state, in order to monitor the packet transmitted from the computer on the network, the power supply is maintained in the NIC (Network Interface Card) for receiving the packet. However, if the information processing device is returned from the low power consumption state to the normal power state each time in order to return a response to the packet received by the NIC, the power consumption of the information processing device becomes large as a result. ..

Therefore, a technique called proxy response has been proposed. The proxy response is a technique in which the NIC has a function of responding to a specific packet. By this proxy response, the specific packet is replied by the NIC while the information processing device remains in the low power consumption state (without returning the information processing device to the normal power state). As a result, the time during which the information processing apparatus is in the low power consumption state increases, so that the power consumption of the information processing apparatus can be reduced. On the other hand, when a packet other than a specific packet is received, the NIC cannot make a proxy response, so it is necessary to restore the information processing apparatus from the low power consumption state to the normal power state. When a packet that cannot be represented by proxy is received, the information processing device that has returned to the normal power state responds to the packet.

An information processing device that performs a proxy response in a low power consumption state can respond to a specific packet transmitted from an external device in the low power consumption state, but for a packet other than the specific packet. Cannot respond in the low power consumption state. Then, in an environment in which the information processing device frequently receives packets that cannot be replied by proxy, the information processing device frequently returns from the low power consumption state to the normal power state. In such an environment, every time the information processing device returns to the normal state, the time counting of the shutdown transition time until the above-mentioned auto-shutdown function is activated is stopped. Therefore, despite the auto-shutdown function. The function will not be executed. As a result, the information processing device does not turn off no matter how long.

Therefore, the present invention provides an information processing device capable of shifting to the fourth power state based on the time set in the timekeeping means even when shifting from the third power state to the second power state. The purpose.

In order to achieve the above object, the printing apparatus of the present invention has a first power state, a second power state that saves power from the first power state, a third power state that saves power from the second power state, and the first power state. A printing device having a fourth power state that saves power from the third power state, a printing means for printing an image on a recording medium, a timing means, and a network while the printing device is in the third power state. The communication means that receives data from the external device via the network and transmits the response to the received data to the external device via the network, and the power state of the printing device are set to (1) the time set in the timing means. Based on, the third power state is shifted to the fourth power state, (2) the third power state is shifted to the second power state based on the first transition factor, and (3) the first. The power supply control means and the printing device that shift from the third power state to the first power state based on the second shift factor different from the first shift factor, and the third power based on the second shift factor. When the state shifts to the first power state, the control means is provided with a control means for prohibiting the printing device from shifting to the fourth power state based on the time set in the timing means. When the printing device shifts from the third power state to the second power state based on the first shift factor, the printing device causes the fourth power based on the time set in the timing means. Does not prohibit the transition to the state.

According to the above configuration, even when the third power state is changed to the second power state, the fourth power state can be changed based on the time set in the time measuring means.

It is a figure which shows the whole structure of the communication system which includes the MFP which concerns on 1st Embodiment. It is a figure which showed the structure of the power supply circuit of the MFP. It is a hard block diagram of the MFP. It is a block diagram of the timer part of the MFP. It is a block diagram of the timer setting register of the timer part of the MFP. It is a figure which showed the operation part of the MFP. It is a state transition diagram for explaining the power state of the MFP. It is a flowchart for demonstrating the operation of the NIC in the case of the MFP in the DeepSleep state. It is a flowchart which shows the process which the MFP shifts to a DeepSleep state, and the process which returns from a DeepSleep state. It is a flowchart which shows the processing of the timer part of the MFP. (A) It is a time chart showing the change of the power state of the MFP in chronological order (when the MFP recovers from the DeepSleep state due to a specific recovery factor). (B) It is a time chart showing the change of the power state of the MFP in chronological order (when the MFP recovers from the DeepSleep state due to a factor other than a specific recovery factor).

<First Embodiment>
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

<Overall configuration of printing system>
FIG. 1 is a diagram showing an overall configuration of a printing system including the MFP of the first embodiment of the present invention. As shown in FIG. 1, the printing system 1 of the first embodiment includes a host computer (hereinafter referred to as a PC) 100 and an MFP 200 that can be connected to the PC 100 via a network 300. In this printing system 1, the PC 100 and the MFP 200 communicate with each other via a bidirectional interface. The bidirectional interface may be wired such as LAN or USB, or wireless such as wireless LAN.

The MFP 200 has a plurality of functions such as a printer, a scanner, a copy and a fax.

A printer driver is installed on the PC100. The PC 100 transmits print data to the MFP 200.

<About the power supply circuit of the MFP>
FIG. 2 is a block diagram of the power supply control of the MFP 200.

The MFP 200 is connected to an AC power supply AC, and the main switch 501 and the power supply unit 502 are connected to the AC power supply AC. Further, a relay 503, a power supply unit 504, and a switch 505 are provided between the main switch 501 and the printer unit 20. Further, a relay 506, a power supply unit 507, and a switch 508 are provided between the main switch 501 and the scanner unit 10.

The main switch 501 controls on / off of the power supplied from the AC power supply AC to each part of the MFP 200. The main switch 501 is a solenoid switch, and is composed of a switch and an actuator. The switch can be turned off manually or automatically. The actuator is composed of a solenoid and an iron core (located inside the solenoid), and by passing an electric current through the solenoid, the iron core can be operated and the switch can be automatically turned off.

The power supply unit 502 converts the AC power supply supplied from the AC power supply AC into a DC power supply, and supplies the DC power supply to the controller unit 30. The power supply unit 502 supplies a voltage of 3.3 V to the controller unit 30, for example. A semiconductor switch 509 is provided between the power supply unit 502 and the controller unit 30.

Further, the power supply unit 504 converts the AC power supply supplied from the AC power supply AC into a DC power supply, and supplies the DC power supply to the controller unit 30, the printer unit 20, and the scanner unit 10. The power supply unit 504 supplies a voltage of 12 V to the controller unit 30, the printer unit 20, and the scanner unit 10, for example. Further, the power supply unit 507 converts the AC power supply supplied from the AC power supply AC into a DC power supply, and supplies the DC power supply to the printer unit 20 and the scanner unit 10. The power supply unit 507 supplies a voltage of 24 V to the printer unit 20 and the scanner unit 10, for example.

The on / off of the main switch 501, relay 503, relay 503, switch 505, switch 508, and semiconductor switch 509 described above is controlled by the power supply control unit 50.

As shown in FIG. 7, the MFP 200 of the present embodiment has a Normal state (first power state) 202, a power saving Sleep state (first power state) 203 from the Normal state 202, and a power saving Deep Sleep state from the Sleep state 203. From the (second power state) 204 and the Deep Sleep state (first power state) 204, the power state becomes one of the power saving Power Off state (third power state) 201.

When the MFP 200 is in the Normal state 202, the main switch 501, the relays 503 and 506, the switches 505 and 508, and the semiconductor switch 509 are all turned on. In this Normal state 202, power is supplied from the power supply unit 502 to the controller unit 30. Further, in the Normal state 202, power is supplied from the power supply unit 504 to the controller unit 30, the printer unit 20, and the scanner unit 10. Further, in the Normal state 202, power is supplied from the power supply unit 507 to the printer unit 20 and the scanner unit 10. In this Normal state 202, power is supplied from both the power supply units 502 and 504 to each unit of the controller unit 30 (for example, CPU 301, NIC 305, and timer unit 309).

When the MFP 200 is in the Sleep state 203, the main switch 501, the relays 503 and 506, and the semiconductor switch 509 are turned on, but the switches 505 and 508 are turned off. In this Sleep state 203, power is supplied from both the power supply units 502 and 504 to each unit of the controller unit 30 (for example, CPU 301, NIC 305, and timer unit 309). On the other hand, since the switches 505 and 508 are in the off state, power is not supplied to the printer unit 20 and the scanner unit 10.

When the MFP 200 is in the Deep Sleep state 204, the main switch 501 and the semiconductor switch 509 are turned on, but the relays 503 and 506 and the switches 505 and 508 are turned off. In this DeepSleep state 204, power is supplied from the power supply unit 502 to the controller unit 30, but power is not supplied from the power supply unit 504 to the controller unit 30. Therefore, although power is supplied to the NIC 305 and the timer unit 309 of the controller unit 30, the power is not supplied to the CPU 301. Further, since the relays 503 and 506 are in the off state, power is not supplied to the printer unit 20 and the scanner unit 10.

When the MFP 200 is in the Power Off state 201, the main switch 501, the relays 503 and 506, the switches 505 and 508, and the semiconductor switch 509 are all turned off. Therefore, the power supply to each part of the MFP 200 is stopped.

<Details of MFP>
FIG. 3 is a hard block diagram showing details of the MFP according to the first embodiment of the present invention.

The MFP 200 includes a scanner unit 10, a printer unit 20, a controller unit 30, an operation unit 40, a power supply control unit 50, and a fax unit 60.

The scanner unit 10 reads a document placed by the user and generates image data. The scanner unit 10 exposes the document placed on the platen glass by, for example, a document illumination lamp composed of a halogen lamp, receives the reflected light from the document by the CCD sensor, and outputs it as an image signal. ..

The printer unit 20 exposes a photoconductor based on image data to form an electrostatic latent image, develops the formed electrostatic latent image with a developer (toner), and transfers the formed electrostatic latent image to paper to form an image. To do.

The FAX unit 60 receives the FAX data transmitted from the external device and converts it into printable image data.

The scanner unit 10, the printer unit 20, and the fax unit 60 may have general configurations and functions of known scanners, printers, and facsimiles, and details of general functions and structures as an image processing apparatus may be provided. Description will be omitted.

The operation unit 40 includes various keys that accept operations from the user, and a display unit that displays various setting information such as prints and scanners.

The power control unit 50 controls the power supply to the scanner unit 10, the printer unit 20, the controller unit 30, the operation unit 40, and the fax unit 60 in response to an instruction transmitted from the power control I / F 308 of the controller unit 30. To do.

The controller unit 30 is connected to a scanner unit 10 which is an image reading device, a printer unit 20 which is an image forming device, a fax unit 60, an operation unit 40 which is a user interface, and the like.

The controller unit 30 includes a CPU 301, a ROM 302, a RAM 303, an NVRAM 304, an NIC (network interface) 305, a timer unit 309, and a storage unit 317. Further, the controller unit 30 includes an operation unit I / F306, a scanner / printer communication I / F307, a power supply control I / F308, an ImageBusI / F310, a FAXI / F311, a scanner I / F315, and a printer I / F316. , A storage unit I / F318, an extended I / F319, and an external I / F331. Further, the controller unit 30 includes an image compression / decompression unit 312, an image rotation unit 313, and a RIP unit 314.

The CPU 301 executes various programs such as a control processing routine described later. The ROM 302 stores a startup program for operating the CPU 301 and various programs such as a control processing routine described later. The RAM 303 is used as a work area, an image memory which is a temporary storage place for image data, or the like when the CPU 301 executes various programs. The NVRAM 304 is a non-volatile RAM that stores various control parameters.

The NIC (Network Interface Card) 305 is connected to a LAN and performs various network controls such as sending and receiving e-mails and receiving PDL data transmitted from the PC 100. The details of NIC305 will be described later.

The operation unit I / F 306 is an I / F that communicates with the operation unit 40 described later. The scanner / printer communication I / F 307 is an interface for communicating with the scanner unit 10 and the printer unit 20 described above. The power supply control I / F 308 is an interface between the CPU 301, NIC 304, timer unit 309, and the like and the power supply control unit 50. The power control I / F 308 responds to the power control unit 50 by receiving a power control signal from the NIC 305 or the timer unit 309, so that each unit of the MFP 200 (scanner unit 10, printer unit 20, controller unit 30, Instruct the power supply to the operation unit 40, the FAX unit 60, etc.). The above-mentioned signal for power supply control is, for example, a PME # signal of the PCI standard, a WAKE # signal of the PCI Express standard, or the like. The timer unit 309 measures the current time. Further, the timer unit 309 can set at least one time, and measures whether or not the set time has elapsed.

The storage unit I / F 318 is an I / F for connecting the storage unit 317, and is, for example, SATA (Serial Advanced Technology Atchment). The extended I / F 319 is a bus for transmitting and receiving to and from the NIC, for example, a bus such as PCI and PCI Express, and is connected by a bus of the same type as the extended I / F 324 on the NIC side. The system bus 400 includes the CPU 301, ROM 302, RAM 303, NVRAM 304, operation unit I / F 306, scanner / printer communication I / F 307, power supply control I / F 308, timer unit 309, storage unit I / F 318, and expansion I / F 319. Connected to. The storage unit 317 connected to the storage unit I / F 318 is a non-volatile storage device for storing a program or data, and is, for example, a hard disk or a flash memory.

The ImageBus I / F310 is a bridge that connects the system bus 400 and the image bus 401 that transfers an image signal. The image compression unit 312, the image rotation unit 313, the RIP unit 314, the scanner I / F unit 315, the printer I / F unit 316, and the FAX I / F311 are connected to the image bus 401.

The image compression unit 312 performs compression / decompression processing such as JPEG, JBIG, MMR, and MH. The image rotation unit 313 performs rotation processing of image data. The RIP (raster image processor) unit 314 expands the PDL code into a bitmap raster image. The scanner I / F unit 315 is an interface for connecting the scanner unit 10. The scanner I / F315 performs image processing for the scanner such as correction, processing, and editing on the data read by the scanner unit 10. The printer I / F unit 316 performs image processing for the printer, such as correction of the printer and resolution conversion, on the image data for print output. The image-processed print data is transferred to the printer unit 20. The FAXI / F311 is an interface for connecting the FAX unit 60, and performs image processing for fax such as image expansion, correction, processing, and editing on the image compressed data received by the FAX unit 60. Further, the FAXI / F311 performs image processing for facsimile such as image compression, correction, and resolution conversion for fax on the image data for fax transmission, and transfers the print data to the FAX unit 60.

The external I / F 331 is an I / F for connecting an external device to the MFP 200. The external I / F 331 is, for example, a USB (Universal Serial Bus) or an ID card reader I / F.

<Details of NIC section>
Next, the details of NIC305 will be described.

As shown in FIG. 3, the NIC 305 has a CPU 320, a ROM 321 and a RAM 322, a Network I / F323, an extended I / F324, an LED 325, and a PME326.

The CPU 320 executes various programs such as a control processing routine described later. The ROM 321 holds various programs such as a startup program necessary for the CPU 320 to operate, a control processing routine described later, and various parameters necessary for network control such as a MAC address. The RAM 322 is used as a temporary storage place for work areas and packets when the CPU 320 executes various programs. NetworkI / F323 is, for example, IEEE802.3 and an extended version thereof. The extended I / F 324 is a bus for connecting the NIC 305 and the system bus 400. The extended I / F 324 is, for example, an interface such as PCI or PCI Express, and is connected to an interface of the same type as the above-mentioned extended I / F 319. The LED 325 is connected to the LED via GPIO and functions as a display indicating the status of the NIC 305. For example, the LED 325 makes it possible to indicate various operating states such as an electrical connection state between the Network I / F 323 and the network 300 and a communication mode by the color and blinking pattern of the LED. The PME 326 is an interface for notifying the power control I / F 308 of an event for power management. The PME 326 transmits a signal used for Wake on LAN, such as a PCI standard PME # signal or a PCI Express WAKE # signal, to the power supply control I / F 308 via GPIO, for example.

<Timer configuration>
FIG. 4 is a block diagram for explaining the configuration of the timer unit 309 in the MFP 200. Next, the configuration of the timer unit 309 will be described in detail with reference to FIG. The timer unit 309 includes an I / F 1101, a setting register 1102, a shutdown timer 1104, a DeepSleep timer 1105, a DeepSleep return date / time comparator 1106, and an RTC1107.

The I / F 1101 is a bridge connected to the system bus 400 (see FIG. 3) described above and the bus in the timer unit 309. The timer setting register 1102 is a register for storing the timer and the setting. For example, the timer setting register 1102 is composed of a memory capable of holding values such as SRAM, DRAM, and EEPROM. The shutdown timer 1104 is a counter for timing the duration of the DeepSleep state 204. The shutdown timer 1104 decrements the counter at regular intervals in the DeepSleep state 204, and when the counter reaches zero, an alarm is generated. Upon receiving this alarm via the power control I / F 308, the power control unit 50 supplies power to the CPU 301 whose power supply is stopped in the DeepSleep state 204. Then, the power-supplied CPU 301 performs termination processing such as an OS. After the end processing executed by the CPU 301 is completed, the power supply control unit 50 shifts the power state of the MFP 200 to the PowerOff state 201. The DeepSleep timer 1105 is a counter that measures the duration of the Normal state 202 or the DeepSleep state 203. The DeepSleep timer 1105 decrements the counter at regular intervals in the Normal state 202 or Sleep state 203, and generates an alarm when the counter becomes zero. The CPU 301 that receives this alarm via the power control I / F 308 performs a transition process to the DeepSleep state 204. After the process of shifting to the DeepSleep state 204 is completed, the power supply control unit 50 shifts the power state of the MFP 200 to the DeepSleep 201. The DeepSleep return date / time comparator 1106 is a circuit for generating an alarm for returning from the DeepSleep state 204 to the Normal state 202 at a preset date and time. For example, the DeepSleep return date / time comparator 1106 compares the deep sleep return date / time set in the DeepSleep return date / time setting value 1303 of the setting register 1102 described later with the current date / time of RTC1107, and if these dates and times match, Notify an alarm. Upon receiving the alarm via the power control I / F 308, the power control unit 50 returns the power state of the MFP 200 from the Deep Sleep state 204 to the Normal state 202. The CPU 301 to which power is supplied due to this alarm executes the specific operation 1 or the specific operation 2 described later.

<Structure of timer setting register>
FIG. 5 is a diagram for explaining the timer setting register 1102 of the timer unit 309 described above. The timer setting register 1102 has set values such as a shutdown transition time setting value 1301, a DeepSleep transition time setting value 1302, a DeepSleep return date and time setting value 1303, and a Sleep transition time setting value 1304. The shutdown transition time setting value 1301 indicates the time (shutdown transition time (first transition time)) until the MFP 200 transitions from the DeepSleep state 204 to the PowerOff state 201. When the shutdown transition time elapses while the MFP 200 remains in the DeepSleep state 204, the MFP200 shifts from the DeepSleep state 204 to the PowerOff state 201. This shutdown transition time is a time set by the user using the setting screen (see FIG. 6) described later. The Deep Sleep transition time setting value 1302 indicates the time (deep sleep transition time) until the MFP 200 transitions from the Sleep state 203 to the Deep Sleep state 204. When the deep sleep transition time elapses while the MFP 200 remains in the Deep Sleep state 204, the MFP 200 shifts from the Sleep state 203 to the Deep Sleep state 204. The DeepSleep return date / time setting value 1303 is a memory for storing the date / time to be compared by the DeepSleep return date / time comparator 1106. The date and time set by the DeepSleep return date and time setting value 1303 is the date and time when the specific operation is executed. In the present embodiment, an example of executing the specific operation at the date and time set by the DeepSleep return date / time setting value 1303 has been described, but the specific operation can be controlled to be executed at a predetermined time interval. is there. The Sleep transition time setting value 1304 indicates the time (sleep transition time) until the MFP 200 shifts from the Normal state 201 to the Sleep state 203. When the sleep transition time elapses while the MFP 200 remains in the Sleep state 203, the MFP 200 shifts from the Sleep state 203 to the Deep Sleep state 204. Although the addresses corresponding to the above-mentioned set values 1301 to 1304 are shown in FIG. 5, it goes without saying that the present invention is not limited to the values of these addresses.

<Setting auto shutdown transition time>
FIG. 6 is a diagram showing an operation unit 40 of the MFP 200 according to the first embodiment of the present invention. Next, the details of the operation unit 40 will be described with reference to FIG. The operation unit 40 includes a display unit 1210 for displaying various setting information and the like, and an input unit 1220 having various keys operated by the user.

The display unit 1210 includes, for example, an LCD (Liquid Crystal Display), an EL (Electroluminescence), a light emitting diode, a paper lark display, and the like.

The input unit 1220 is composed of, for example, a switch, a touch sensor, a proximity sensor, an optical sensor, or the like. Here, various keys of the input unit 1220 will be described. The input unit 1220 includes a power button 1221 and a setting button 1222. The power button 1221 detects the user's operation and shifts the power state of the MFP 200 from the Normal state 202 or the Sleep state 203 to the Deep Sleep state 204. Further, the power button 1221 returns the power state of the MFP 200 from the Deep Sleep state 204 to the Normal state 202 or the Sleep state 203. The setting button 1222 is a button for detecting the user's operation and displaying the setting screen (the screen displayed on the display unit 1210 in FIG. 6).

Next, a method of setting the shutdown transition time will be described using the shutdown transition time setting screen displayed on the display unit 1210 when the setting button 1222 is pressed.

On the setting screen displayed on the display unit 1210 of FIG. 6, the current setting value 1211 of the shutdown transition time, the buttons 1212 and 1213 for changing the setting value of the shutdown transition time, the confirmation button 1214, and the cancel button are displayed. Button 1215 and are displayed. The set value of the shutdown transition time can be selected from 0 minutes, 15 minutes, 45 minutes, 1 hour, 2 hours, 3 hours, 4 hours, 8 hours, 12 hours, and 24 hours. On the setting screen of FIG. 6, the set value of the shutdown transition time is 3 hours. By the operation of the user, the set value of the shutdown transition time is increased or decreased each time the button 1212 or 1213 described above is touched. When the confirmation button 1214 is touched by the user, the set value of the shutdown transition time displayed on the setting screen is confirmed. The CPU 301 stores the determined value in the shutdown transition time setting value 1301 of the timer setting register 1102. Further, when the cancel button 1215 is touched by the user, the setting screen displayed on the setting screen is changed to another screen.

<About the state transition of the power state of MFP200>
FIG. 7 is a state transition diagram of the power state of the MFP 200 according to the first embodiment of the present invention.

201 in FIG. 7 is a Power Off state in which the power supply of the MFP 200 is cut off. In the PowerOff state 201, power is not supplied to all the blocks shown in FIG. The PowerOff state 201 is a power state similar to a state in which the power breaker is cut off or a state in which the outlet (AC voltage inlet) is not inserted. In the PowerOff state 201, the power supply to each part of the MFP 200 is cut off, so that the CPU 301 cannot operate.

202 in FIG. 7 is a Normal state in which electric power is supplied to each part of the MFP 200. In the Normal state 202, power is supplied to all the blocks shown in FIG. In the Normal state 202, the CPU 301 can operate. In this Normal state 202, power is supplied to all the blocks shown in FIG. 2, so that operations such as copying, scanning, and facsimile transmission can be performed.

203 in FIG. 7 is a Sleep state in which the power supply of a part of the MFP 200 is stopped. In the Sleep state 203, the power consumption of the MFP 200 is lower than that in the Normal state 202. In this Sleep state 203, the power supply to the scanner unit 10, the printer unit 20, and the operation unit 40 is stopped, and the power supply to the remaining blocks is maintained. In the Sleep state 203, the CPU 301 can operate.

204 in FIG. 7 is a DeepSleep state in which power is supplied to a small part of the blocks of the MFP 200. In the DeepSleep state 204, the RAM 303, NIC305, the power supply control unit 50, the power button detection circuit (not shown) of the operation unit 40, the timer unit 309, a part of the power supply control I / F308, a part of the external I / F331, and the FAX unit. The power supply to each block except a part of 60 is stopped. In this DeepSleep state, the RAM 303 goes into a self-refresh mode. In the DeepSleep state 204, the power supply to the CPU 301 is stopped, and the CPU 301 cannot operate.

Next, the transition conditions between the states shown in FIG. 7 will be described.

The transition from the PowerOff state 201 to the Normal state 202 is made in response to the ON operation of the main switch 501 of the operation unit 40. The transition from the Normal state 202 to the PowerOff state 201 is made in response to the above-mentioned off operation of the main switch 501.

The transition from the Normal state 202 to the Sleep state 203 occurs when the sleep transition time T1 (for example, 15 minutes) and the MFP 200 is not continuously operated.

The transition from the Sleep state 203 to the Deep Sleep state 204 occurs when the deep sleep transition time T2 (for example, 30 minutes) and the MFP 200 is not continuously operated. The deep sleep transition time T2 is a value set in the DeepSleep transition time setting value 1302.

The transition from the Sleep state 203 to the Normal state 202 occurs when a print job is received or when an operation of the operation unit 40 is detected. Further, the state transitions from the DeepSleep state 204 to the Normal state 202 when a print job is received or when an operation of the operation unit 40 (power button 1221 (not shown)) is detected.

The transition from the DeepSleep state 204 to the DeepSleep state 203 occurs when a packet that cannot be represented by the NIC 305 is received.

The transition from the DeepSleep state 204 to the PowerOff state 201 occurs when the shutdown transition time T3 (for example, 3 hours) and the MFP200 is not continuously operated. When shifting from the DeepSleep state 204 to the PowerOff state 201, the DeepSleep state 204 temporarily transitions to the SLEEP state 203, and then the SLEEP state 203 shifts to the PowerOff state 201. The reason for temporarily returning to the SLEEP state 203 is to start the CPU 301 and perform the termination process. The shutdown transition time T3 is a value set in the shutdown transition time set value 1301.

<Explanation of NIC operation>
When the MFP 200 is in the DeepSleep state 204, the NIC 305 can make a proxy response. The flowchart shown in FIG. 8 corresponds to a program stored in the ROM 321 or RAM 322 of FIG. 2, and when the MFP 200 is in the DeepSleep state 204, the program is executed on the CPU 320 of the NIC 305. Here, the operation of the NIC 305 when the MFP 200 is in the DeepSleep state 204 will be described with reference to FIG.

First, the CPU 320 of the NIC 305 waits for the reception of the packet on the network 300 (S401). Then, when the CPU 320 determines that the packet on the network 300 has been received, it determines whether or not it is possible to make a proxy response to the received packet (S402). The determination as to whether or not the proxy response is possible is performed by comparing the received packet with the proxy response packet pattern stored in the ROM 321. If the received packet and the packet pattern of the proxy response possible stored in the ROM 321 match, the CPU 320 determines that the proxy response is possible (S402: Yes). On the other hand, if the received packet and the packet pattern in which the proxy response is possible stored in the ROM 321 do not match, the CPU 320 determines that the proxy response is not possible (S402: No).

When it is determined that the CPU 320 can make a proxy response to the received packet (S402: Yes), the CPU 320 makes a proxy response (S403). That is, the MFP 200 returns the response to the received packet to the source of the packet while remaining in the DeepSleep state 204.

On the other hand, when the CPU 320 determines that the proxy response is not possible (S402: No), the CPU 320 notifies the power supply control unit 50 that the MFP 200 transitions from the Deep Sleep state 204 to the Sleep state 203 or the Normal state 202. To control. Specifically, the CPU 320 controls the PME 326 to set the PME # signal output from the PME 326 to Low. As a result, the power supply control I / F 306 receives the Low PME # signal. Then, the power supply control I / F 306 that has received the PME # signal notifies the power supply control unit 50 that the power state of the MFP 200 changes from the Deep Sleep state 204 to the Sleep state 203 or the Normal state 202 (S404).

<Processing until the MFP shifts to the DeepSleep state>
FIG. 9 is a flowchart showing a process of shifting to the DeepSleep state 204 and a process of returning from the DeepSleep state of the MFP 200 according to the first embodiment. The flowchart shown in FIG. 9 corresponds to a program stored in the ROM 321 or RAM 322 of FIG. 2, and the program is executed on the CPU 301.

After the MFP 200 shifts to the Sleep state 203, the CPU 301 determines whether or not it has detected the shift factor to the Deep Sleep state 204 (S501). When it is determined that the CPU 301 has detected the cause of transition to the DeepSleep state 204 (S501: Yes), the timer unit 309 initializes the shutdown timer 1104 (S502). In this initialization process, the CPU 301 causes the timer unit 309 to clear the value of the shutdown timer 1104 and start counting the shutdown timer 1104. By clearing the value of the shutdown timer 1104, it is possible to count the time from the transition to the DeepSleep state 204 this time. After the CPU 301 initializes the shutdown timer 1104 in the timer unit 309, the CPU 301 executes the transition process to the DeepSleep state 204 (S503). Then, the MFP 200 shifts from the DeepSleep state 203 to the DeepSleep state 204. Specifically, the CPU 301 causes the power supply control unit 50 to turn off the relay 503, the switch 505, the relay 506, and the switch 508. As a result, RAM 303, NIC 305, power supply control unit 50, detection circuit of power supply button 1221 of operation unit 40, part of power supply control I / F 308, timer unit 309, part of external I / F 331, part of FAX unit 60. The power supply to each part except for is stopped. That is, the power supply to the CPU 301 is stopped. When the MFP 200 shifts from the Sleep state 203 to the Deep Sleep state 204, the register value of each unit of the controller unit 30 is saved in the RAM 303. Further, in the DeepSleep state 204, the RAM 303 enters the self-refresh mode.

<Operation of timer unit 309 of MFP200>
Next, in S502 described above, the operation of the timer unit 309 when the timer unit 309 is initialized and the count of the shutdown timer 1104 is started will be described. When the power state of the MFP 200 shifts to the DeepSleep state 204, the power supply to the CPU 301 is stopped. On the other hand, in the DeepSleep state 204, the power supply to the timer unit 309 is continued. Therefore, even in the DeepSleep state 204, the timer unit 309 can execute the process based on the flowchart of FIG. The flowchart of FIG. 10 is executed by a logic circuit in the timer unit 309, or is executed by a CPU (not shown) in the timer unit 309.

First, the timer unit 309 determines whether or not to stop the count of the shutdown timer 1104 (S601). When the CPU 301 interrupts the stop command of the shutdown timer 1104 in S510, which will be described later (S601: Yes), the timer unit 309 stops the count of the shutdown timer 1104 (S602).

On the other hand, when the shutdown timer 1104 is not interrupted by the stop command from the CPU 301 (S601: No), the timer unit 309 determines whether the counted shutdown timer 1104 is larger than the preset shutdown transition time set value 1301. Is determined (S603). Then, when the timer unit 309 determines that the value of the shutdown timer 1104 is larger than the shutdown transition time set value 1301 (S603: Yes), the timer unit 309 sends the power control unit 50 to the power supply control unit 50 via the power supply control I / F 308. Notify the alarm (S604). Specifically, the timer unit 309 notifies the power supply control unit 50 that the MFP 200 will be shut down by changing the logic of the alarm signal TIRQ # output from the timer unit 309 from “Hi” to “Lo”. To do.

Upon receiving the alarm notification from the timer unit 309, the power supply control unit 50 shifts the power state of the MFP 200 from the DeepSleep state 204 to the PowerOff state 201. Specifically, the power supply control unit 50 that has received the alarm notification from the timer unit 309 temporarily shifts the power state of the MFP 200 to the SLEEP state 203, and supplies power to the CPU 301 and the like. Then, the CPU 301 to which the power is supplied performs the termination processing of the OS and the like, and after the termination processing executed by the CPU 301 is completed, the power supply control unit 50 shifts the power state of the MFP 200 to the PowerOff state 201. When the power state of the MFP 200 shifts to the Power Off state 201, the contents temporarily stored in the RAM 303 are written in the storage unit 317 or the NVRAM 304. Further, the device connected to the network I / F 323 or the external I / F 331 may be notified of the shutdown. Then, the power supply to each part of the MFP 200 is stopped.

On the other hand, when the timer unit 309 determines that the value of the shutdown timer 1104 is not larger than the shutdown transition time set value 1301 (S603: No), the count of the shutdown timer 1104 is continued and the process returns to S601.

<Processing when the MFP returns from the DeepSleep state>
Next, returning to FIG. 9, the processing when the MFP 200, which was in the DeepSleep state 204, returns from the DeepSleep state 204 will be described.

When the DeepSleep recovery factor is detected in the DeepSleep state 204, the power supply control unit 50 restarts the power supply to the CPU 301. Then, the CPU 301 executes a process for returning the MFP 200 from the DeepSleep state (S504). When the MFP 200 returns from the Deep Sleep state 204, the register value saved in the RAM 303 is written back to each unit of the controller unit 30, or the register value is reset. Further, the RAM 303 returns from the self-refresh mode.

Then, the CPU 301 determines the cause of recovery from the DeepSleep state 204. Here, when it is determined that the MFP 200 has recovered from the Deep Sleep state 204 due to a specific recovery factor (S505: Yes), the CPU 301 controls the MFP 200 to shift to the Sleep state 203. For example, when the CPU 301 determines that it has returned by receiving a packet that cannot respond by proxy (S505: Yes), the CPU 301 controls the MFP 200 to shift to the Sleep state 203. This specific packet that cannot respond by proxy requires that the CPU 301 inquires about the device information of the MFP 200 (for example, the remaining amount of consumables such as paper, ink, or toner) via the ImageBus I / F310 or the printer I / F316. Is a packet. Further, the packet that cannot respond by proxy is a packet in which the CPU 301 needs to inquire the information of the MFP 200 stored in the storage unit 317 or the NVRAM 304 via the storage unit I / F 318.

Then, after the MFP 200 shifts to the Sleep state 203 (S506), the CPU 301 initializes the DeepSleep timer 1105 in the timer unit 309 (S507). In this initialization process, the CPU 301 causes the timer unit 309 to change the value of the DeepSleep transition time setting value 1302 and start counting the DeepSleep timer 1105. Specifically, the CPU 301 causes the timer unit 309 to change the value of the DeepSleep transition time setting value 1302 from, for example, "1 hour" to "1 minute". Then, the CPU 301 determines whether or not the factor of transition to the DeepSleep state 204 has been detected (S508). When it is determined that the CPU 301 has detected the cause of the transition to the DeepSleep state 204 (S508: Yes), the system returns to S503 without initializing the shutdown timer 1104 (S502).

On the other hand, when it is determined that the MFP 200 has recovered from the DeepSleep state 204 due to a factor other than the specific recovery factor (S505: No), the CPU 301 controls the MFP 200 to shift to the Normal state 201. For example, when the CPU 301 determines that the print data has been returned from the PC 100 (S505: No), the CPU 301 controls the MFP 200 to shift from the Deep Sleep state 204 to the Normal state 203. Then, the CPU 301 causes the timer unit 309 to stop the count of the shutdown timer 1104 (S510). As a result, in the flowchart shown in FIG. 10, the timer unit 309 stops counting the shutdown timer 1104 (S601 to S602). Then, the CPU 301 determines whether or not the factor of transition to the Sleep state 203 has been detected (S511). When it is determined that the CPU 301 has detected the cause of the transition to the Sleep state 203 (S511: Yes), the CPU 301 controls the MFP 200 to shift to the Sleep state 203 (S512).

Then, after the MFP 200 shifts to the Sleep state 203 (S512), the CPU 301 initializes the DeepSleep timer 1105 in the timer unit 309 (S513). In this initialization process, the CPU 301 causes the timer unit 309 to clear the value of the DeepSleep timer 1105 and start counting the DeepSleep timer 1105. After that, returning to S501, the CPU 301 determines whether or not the factor of transition to the DeepSleep state 204 has been detected (S501). When it is determined that the CPU 301 has detected the cause of transition to the DeepSleep state 204 (S501: Yes), the timer unit 309 initializes the shutdown timer 1104 (S502). In this initialization process, the CPU 301 causes the timer unit 309 to clear the value of the shutdown timer 1104 and start counting the shutdown timer 1104.

As described above, when the MFP 200 returns due to a specific recovery factor, it does not return to S502, so that the shutdown timer 1104 is not initialized. Therefore, since the count of the shutdown timer 1104 is continued, the shutdown function operates regardless of the return from the DeepSleep state 204 of the MFP200. As a result, every time the MFP 200 temporarily returns from the DeepSleep state 204, the shutdown timer 1104 is initialized, and the inconvenience that the shutdown function does not work forever is solved.

<About the transition of the power state of the MFP>
FIG. 11 is a time chart showing the transition of the power state of the MFP 200 in chronological order. Next, with reference to FIG. 11, the transition of the power state of the MFP 200 of the first embodiment will be described. In the first embodiment, the following values are set in the setting register 1102 of the timer unit 309.

Sleep transition time set value 1304: 15 minutes (time until transition from Normal state 202 to Sleep state (hereinafter, appropriately referred to as T1))
DeepSleep transition time set value 1302: 1 hour (time until transition from Sleep state 203 to DeepSleep state 204 (hereinafter, appropriately referred to as T2))
Shutdown transition time set value 1301: 3 hours (Time from transition from DeepSleep state 204 to PowerOff state 201 (hereinafter, appropriately referred to as T3))
First, with reference to FIG. 11A, a case where the MFP 200 returns from the Deep Sleep state 204 to the Sleep state 203 due to a specific return factor (for example, receiving a packet that cannot respond by proxy) will be described.

In FIG. 11A, Ta is the time when the idle is reached in the Normal state 202. Here, Idle is a job waiting state in which operations such as copying, scanning, and facsimile transmission are not performed.

Next, when the time T1 continues as Idle (Ta to Tb), the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm from the timer unit 309 shifts the power state of the MFP 200 from the normal state 202 to the sleep state 203.

After the MFP 200 shifts to the Sleep state 203, if the time T2 (Tb to Tc) elapses in the Sleep state 203, the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm shifts the power state of the MFP 200 from the Sleep state 203 to the Deep Sleep state 204.

In the present embodiment, even if the MFP 200 temporarily shifts from the Deep Sleep state 204 to the Sleep state 203 due to a reason such as responding to a packet that cannot be represented by proxy after the MFP 200 shifts to the Deep Sleep state 204, in the present embodiment, the time Tc to the time T3 At the time Tf after the lapse, the MFP 200 transitions to the PowerOff state 201. At this time Tf, the timer unit 309 generates an alarm. Upon receiving the alarm, the power supply control unit 50 temporarily shifts the power state of the MFP 200 from the Deep Sleep state 204 to the Sleep state 203 in order to supply power to the CPU 301 that executes the termination process. This allows the CPU 301 to perform termination processing such as the OS. Then, the CPU 301 executes the termination process, and the power supply control unit 50 shifts the power state of the MFP 200 from the Sleep state 203 to the PowerOff state 201.

In the present embodiment, when the MFP 200 receives a packet that cannot make a specific proxy response at the time Td while the timer unit 309 is counting the time T3, the MFP 200 starts from the DeepSleep state 204 in order to return a response to the packet. It shifts to the Sleep state 203. As a result, the CPU 301 can respond to the packet. At the time Te after the response to the packet by the CPU 301 is completed, the MFP 200 shifts to the DeepSleep state 204. As described above, when the MFP200 is started by a specific recovery factor, the DeepSleep transition time setting value 1302 is changed from 1 hour to 1 minute (see S507), so that the MFP200 has completed the response to the packet. After that, it immediately shifts to the DeepSleep state 204.

As described above, in the present embodiment, even if the MFP 200 returns to the DeepSleep state 204 due to a specific recovery factor, the shutdown timer 1104 is not initialized and the count of the shutdown timer 1104 is continued. As a result, even if the MFP 200 temporarily returns to the DeepSleep state 204, the MFP200 shifts to the PowerOff state 201 from the time Tc when the state shifts to the DeepSleep state 204 to the time Tf after the lapse of time T3.

Next, with reference to FIG. 11B, a case where the MFP 200 returns from the DeepSleep state 204 to the Normal state 202 due to a factor other than the specific recovery factor (for example, receiving print data) will be described.

In FIG. 11B, Ta is the time when the idle is reached in the Normal state 202.

Next, when the time T1 continues as Idle (Ta to Tb), the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm from the timer unit 309 shifts the power state of the MFP 200 from the normal state 202 to the sleep state 203.

After the MFP 200 shifts to the Sleep state 203, if the time T2 continues (Tb to Tc) in the Sleep state 203, the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm shifts the power state of the MFP 200 from the Sleep state 203 to the Deep Sleep state 204.

If the NIC 305 receives print data after the MFP 200 shifts to the DeepSleep state 204 and before the time T3 elapses, the MFP200 shifts from the DeepSleep state 204 to the Normal state 202. After the transition to the Normal state 202, when the time T1 (Td to Tg) elapses in the Idle state, the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm from the timer unit 309 shifts the power state of the MFP 200 from the normal state 202 to the sleep state 203.

After the MFP 200 shifts to the Sleep state 203, when the time T2 (Tg to Th) elapses in the Sleep state 203, the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm from the timer unit 309 shifts the power state of the MFP 200 from the Sleep state 203 to the Deep Sleep state 204.

Then, after the MFP 200 shifts to the DeepSleep state 204 and the time T3 (Th to Ti) elapses in the DeepSleep state, the timer unit 309 generates an alarm. Then, the power supply control unit 50 that receives the alarm from the timer unit 309 shifts the power state of the MFP 200 from the DeepSleep state 204 to the PowerOff state 201. As described above, when the MFP 200 is shifted from the Deep Sleep state 204 to the Power Off state 201, it is temporarily returned to the Sleep state.

<Effect of the first embodiment>
In the present embodiment, even if the MFP 200 shifts from the Deep Sleep state 204 to the Sleep state 203 due to a specific recovery factor, the count of the shutdown timer 1104 is not stopped. Therefore, the MFP 200 can be shifted to the PowerOff state 201 after the time T3 indicated by the shutdown transition time setting value 1301 has elapsed from the time Tc when the transition to the DeepSleep state 204 has occurred. This solves the problem that the MFP 200 does not shift to the Power Off state 201 forever due to the MFP 200 returning from the Deep Sleep state.

Further, in the present embodiment, when the DeepSleep state 204 is restored to the Sleep state 203 due to a specific return factor, the value of the DeepSleep transition time setting value 1302 is changed (for example, 1 hour ⇒ 1 minute). As a result, the MFP 200 can immediately shift from the DeepSleep state 203 to the DeepSleep state 204. That is, it is possible to immediately shift the MFP200 from the DeepSleep state 204 to the SleepSleep state 204 to the DeepSleep state 204 due to a specific recovery factor.

<Modification example>
In the above embodiment, as a specific recovery factor, the fact that the NIC 304 has received a packet that cannot be represented by proxy is illustrated, but the specific recovery factor of the present invention is not limited to this.

For example, the shutdown timer 1104 may not be cleared when the MFP 200 returns from the Deep Sleep state 204 to the Sleep state in order to execute the specific operation 1 or the specific operation 2 illustrated below.

Specific operation 1: Operation of periodically rotating the transfer roller (not shown) mounted on the scanner unit 10 or printer unit 20 of the MFP 200. Specific operation 2: Scanner unit 10 or printer of the MFP 200. The operation of periodically operating the photosensitive drum (not shown) or the fuser (not shown) mounted on the unit 20 for maintenance. Further, the above-mentioned specific recovery factor is
The power button 1221 of the operation unit 40 was detected by a detection circuit (not shown). An interrupt process from the timer unit 309 occurred. The fax unit 60 received the fax. An external device was connected to the external I / F 331. External An ID card reader (not shown) connected to the I / F 331 may have detected the ID card.

Note that the interrupt processing from the timer unit 309 described above is a preset date and time or a predetermined period based on the value set in the DeepSleep return date and time set value 1303, the current date and time measured by the RTC1107, and the comparison result. It is executed every time.

In the above embodiment, the MFP 200 has been described as an example of the information processing device, but the present invention is not limited to the MFP 200. The information processing device of the present invention may be an inkjet printer. In the case of an inkjet printer, the shutdown timer 1104 may not be cleared when the inkjet printer is returned from the DeepSleep state 204 in order to periodically clean (suction, wiping, etc.) the ink that has begun to dry.

Further, the above-mentioned shutdown transition time setting value 1301 has been described as being set by the operation of the operation unit 40 by the user using the setting screen (see FIG. 6), but in the present invention, the shutdown transition time setting is set. It may be set automatically based on the life of the device and the power status. Further, the shutdown transition time setting value 1301 may be set remotely from the PC 100.

Further, in the above embodiment, an example in which the count of the shutdown timer 1104 is continued when the state shifts from the Deep Sleep state 204 to the Sleep state 203 due to a specific recovery factor has been described, but the present invention is not limited to this. That is, even when the DeepSleep state 204 is changed to the Sleep state due to a specific recovery factor, the shutdown timer 1104 may be stopped when the HDD (storage unit 314) is accessed.

Further, even when the state shifts from the Deep Sleep state 204 to the Sleep state 203 due to a specific recovery factor, the shutdown timer 1104 may be stopped if a reserved job at a specified time exists.

As a result, even when the MFP 200 shifts from the Deep Sleep state 204 to the Sleep state 203 due to a specific recovery factor, the shutdown timer 1104 is counted when the HDD is accessed or a reserved job occurs. It is possible to prevent the shutdown function from being executed.

50 Power control unit 200 MFP
201 PowerOff state 202 Normal state 203 Sleep state 204 DeepSleep state 301 CPU
304 NIC
309 Timer 1104 Shutdown timer 1301 Shutdown transition time setting value 1302 Deep sleep transition time setting value

Claims (21)

A printing device having a first power state, a second power state that saves power from the first power state, a third power state that saves power from the second power state, and a fourth power state that saves power from the third power state. And
A printing means for printing an image on a recording medium,
Timekeeping means and
A communication means that receives data from an external device via a network and transmits a response to the received data to the external device via the network while the printing device is in the third power state.
The power status of the printing device
(1) The transition from the third power state to the fourth power state is performed based on the time set in the timekeeping means.
(2) Based on the first transition factor, the transition from the third power state to the second power state is performed.
(3) A power supply control means for shifting from the third power state to the first power state based on a second shift factor different from the first shift factor.
When the printing device shifts from the third power state to the first power state based on the second transition factor, the printing device shifts to the fourth power state based on the time set in the timekeeping means. Equipped with control measures that prohibit migration,
When the printing device shifts from the third power state to the second power state based on the first shift factor, the control means causes the printing device to shift to the second power state based on the time set in the timekeeping means. A printing apparatus characterized in that it does not prohibit the transition to the fourth power state. The printing device according to claim 1, wherein the power supply controlling means shifts the power state of the printing device to the third power state based on a time set in the time measuring means. When the printing device shifts from the third power state to the second power state, the power control means sets the power state of the printing device based on a time different from the time set in the timekeeping means. The printing apparatus according to claim 2, wherein the printing apparatus shifts to the third power state. The printing apparatus according to claim 3, wherein the different time is shorter than the time set in the timekeeping means. The power supply control means is characterized in that it shifts from the third power state to the fourth power state via a state in which the control means is activated based on a time set in the timekeeping means. The printing apparatus according to any one of 1 to 4. The printing device according to claim 5, wherein the activated control means executes an OS termination process. The communication means stores a packet pattern to be compared with the received packet and stores the packet pattern.
While the printing device is in the third power state, a packet is received from an external device via the network, and the received packet via the network is based on a comparison result between the received packet and the stored packet pattern. The printing device according to any one of claims 1 to 6, wherein a response to the device is transmitted to the external device. The printing apparatus according to any one of claims 1 to 7, wherein the first transition factor is reception of a packet for which the communication means cannot transmit a response. The printing device according to claim 8, wherein the packet is a packet for acquiring information on the printing device. The printing device according to claim 9, wherein the packet is a packet for acquiring information about consumables used in the printing device. The printing apparatus according to any one of claims 1 to 10, wherein the second transition factor is reception of print data. The invention according to any one of claims 1 to 11, wherein when the power state of the printing apparatus shifts to the second power state or the third power state, the timekeeping means starts measuring the time. The printing device described. The claim is characterized in that when the printing apparatus shifts to the third power state, the control means clears the time timed by the timekeeping means and starts the timekeeping of the set time. A printing apparatus comprising any one of items 1 to 12. In the second power state, the power supply to the printing means is stopped.
The printing apparatus according to any one of claims 1 to 13, wherein in the third power state, the power supply to the CPU of the printing means and the control means is stopped. The printing apparatus according to any one of claims 1 to 14, wherein the power supply to the CPU of the control means is not stopped in the second power state. The printing apparatus according to any one of claims 1 to 15, further comprising an operating means for receiving a user operation for setting the time in the time measuring means. The printing apparatus according to any one of claims 1 to 15, further comprising a reception means for remotely receiving a user operation for setting the time in the timekeeping means. The printing apparatus according to any one of claims 1 to 17, further comprising a display means for displaying a screen for setting the time. With more main switches
The printing device according to any one of claims 1 to 18, wherein the power supply controlling means shifts the printing device to the fourth power state according to an off operation of the main switch. The printing apparatus according to claim 19, wherein the power control means performs an off operation of the main switch. A printing device having a first power state, a second power state that saves power from the first power state, a third power state that saves power from the second power state, and a fourth power state that saves power from the third power state. It is a control method of
A printing means for printing an image on a recording medium,
A step of shifting the power state of the printing apparatus to the third power state, and
A step of receiving data from an external device via a network and transmitting a response to the received data to the external device via the network while the printing device is in the third power state.
A step of shifting the power state of the printing apparatus from the third power state to the fourth power state based on the time set in the time measuring means, and
A step of shifting the power state of the printing apparatus from the third power state to the second power state based on the first shift factor, and
A step of shifting the power state of the printing apparatus from the third power state to the first power state based on a second transition factor different from the first transition factor.
When the printing device shifts from the third power state to the first power state based on the second transition factor, the printing device shifts to the fourth power state based on the time set in the timekeeping means. Has a process that prohibits migration,
When the printing device shifts from the third power state to the second power state based on the first shift factor, the printing device performs the fourth power based on the time set in the timekeeping means. A method of controlling a printing device, characterized in that it does not prohibit the transition to a state.

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