JP2003232819A - Image forming device and power consumption measuring method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To notify a user of electric energy consumed by an image forming device. <P>SOLUTION: This device is equipped with an operation state statistical means 110 for collecting statistics of the operation state of the image forming device and the elapsed time of the operation state, a used power DB 112 for storing used electric energy classified by the operation state, a power calculation means 113 for calculating the used electric energy consumption from the operation state time collected statistically by the operation state statistical means 110 and the used power classified by the operation state in the used power DB 112, and a panel control means 115 for displaying the calculation result on an operation panel 114. The device has a constitution capable of displaying the electric energy consumption consumed by the image forming device in response to a request from a user. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus and a power consumption measuring method for measuring the amount of power consumption used and displaying the measurement result in response to a user's request.

[0002]

2. Description of the Related Art The structure and data processing of a conventional electrophotographic image forming apparatus and image forming system will be described with reference to FIG.

A conventional image forming apparatus includes a controller 70.
1 and an engine 702, the information processing apparatus 703 transmits print data to the image forming apparatus, the controller 701 receives print data and control data from the information processing apparatus 703, and the entire image processing apparatus The engine 702 performs control, forms an image based on the video data sent from the controller 701, transfers the image to a sheet, and prints.

The information processing apparatus 703 has a printer driver (not shown) that creates print data in a printer language based on a print instruction from an application, and a status monitor (not shown) that monitors the state of the image forming apparatus. And are incorporated, and print data is transmitted to the image forming apparatus through the interface 704 according to an instruction from the user. In addition, the status monitor notifies the user of the fact that the abnormality has occurred and the details thereof when the abnormality of the image forming apparatus has occurred, and notifies the user of the abnormality information transmitted from the image forming apparatus by the interface 704, or by an instruction from the user. The current state of the image forming apparatus is acquired from the image forming apparatus by the interface 704 and the acquired information is displayed.

Next, the configuration and operation of the controller 701 will be described.

The controller 701 is an information processing device 70.
3 to receive print data and control data from the interface 704 and to send a response to the control data, and a data transmitting / receiving unit 705, which analyzes the received data and creates print job information in the case of print data,
If it is control data, job analysis means 706 that creates control information and sends a message to the central control means 707.
A central control unit 707 that manages print jobs and the entire image forming apparatus, an interpreter unit 708 that interprets print data and converts it into intermediate image information, and a bitmap from the intermediate image information created by the interpreter unit 708. Rasterizer means 709 for creating an image, engine control means 710 for outputting the bitmap data created by the rasterizer means 709 to the engine 702 as video data, and an operation panel 711 for displaying information to the user and accepting operations. , And panel control means 712 for controlling the operation panel.

The states of the image forming apparatus include a data reception waiting state (generally expressed as a steady state), a power saving state in which power consumption is reduced, and a printing operation state.

The states of these image forming apparatuses are controlled by the central control means 707, are in a steady state at the time of activation, and shift to a power saving state if no print data is received for a certain period of time. When print data is received, the printer returns from the power saving state and prints. Also, when there is a state change such as when the door of the engine 702 is opened, the power saving state is restored, the state change content is displayed on the panel, and if it is monitored by the status monitor, it is also displayed on the status monitor. I do.

[0009]

In the conventional image forming apparatus as described above, since the power consumption value and the maximum power consumption value in the low power consumption state are described in the catalog, the power consumption value in the low power consumption state is described. We were able to know the power consumption value and the maximum power consumption value.

However, the user could not know the amount of power consumption actually consumed by the image forming apparatus.

Therefore, an object of the present invention is to provide an image forming apparatus in which a user can know the amount of power consumption.

[0012]

In order to solve this problem, an image forming apparatus of the present invention is an image forming apparatus which interprets image information created by an information processing apparatus, develops it into bit map data and outputs it. There is a central control means for managing the operating state of the image forming apparatus, an operating state statistical means for recording the operating state and statistics of elapsed time of the operating state, and a power consumption database holding power consumption information for each operating state. ,
An electric power calculating means for calculating the amount of electric power used by using the information statistically calculated by the operating state statistic means and the electric power consumption information held in the electric power consumption database; It is configured to have.

Further, the power consumption measuring method of the present invention is a power consumption measuring method in an image forming apparatus which interprets image information created by an information processing apparatus, develops it into bitmap data and outputs it. The operating state and statistics of the elapsed time of the operating state are recorded, the amount of power used is calculated from the statistics and the power consumption corresponding to the operating state, and the calculated amount of power is displayed.

As described above, since the power consumption is calculated and displayed, the user can know the power consumption of the image forming apparatus.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an image forming apparatus which interprets image information created by an information processing apparatus, develops it into bit map data and outputs it. By the central control means for managing the operating state of, the operating state statistical means for recording the operating state and statistics of the elapsed time of the operating state, the power consumption database holding the power consumption information for each operating state, and the operating state statistical means An image forming apparatus having a power calculation unit that calculates the amount of power used by using the statistical information and the power consumption information held in the power consumption database, and a power display unit that displays the amount of power calculated by the power calculation unit. Since the power consumption is calculated and displayed, the user can know the power consumption of the image forming apparatus.

According to a second aspect of the present invention, in the first aspect of the invention, there is provided a power unit price input means capable of inputting the power unit price, a power unit price database for recording the power unit price, and a used power database. An image forming apparatus comprising: a power charge calculation unit that calculates a power charge used by the image forming apparatus using a power unit price database; and a power charge display unit that displays the power charge calculated by the power charge calculation unit. Since the power amount is calculated and displayed, the user can know the power consumption of the image forming apparatus.

According to a third aspect of the present invention, in the first aspect of the invention, the power consumption database is an image forming apparatus configured by a value obtained by measuring the power consumption in each operation state in advance. Since there is no need to measure, the processing can be simplified, and the desired function can be realized with an inexpensive configuration that does not require hardware resources.

The invention according to claim 4 of the present invention is the image forming apparatus according to any one of claims 1 to 3, wherein the operating state statistical means is an image forming apparatus for recording elapsed time periodically. Even if the power is turned off unexpectedly, the error in the elapsed time can be reduced.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the operation state statistical means initializes statistics of elapsed time of the operation state according to a user's instruction. The image forming apparatus is enabled, and has an effect that the statistical information can be initialized at the convenience of the user.

According to a sixth aspect of the present invention, there is provided a power consumption measuring method in an image forming apparatus for interpreting image information created by an information processing apparatus, expanding the image information into bitmap data, and outputting the bitmap data. It is a power consumption measuring method that records the statistics of the operating state of the device and the elapsed time of the operating state, calculates the amount of power used from the statistics and the power consumption corresponding to the operating state, and displays the calculated amount of power. Since the power consumption is calculated and displayed, there is an effect that the user can know the power consumption of the image forming apparatus.

FIG. 1 shows an embodiment of the present invention.
From now on, description will be made with reference to FIG. In addition, in these drawings, the same members are denoted by the same reference numerals, and duplicate description is omitted.

(Embodiment 1) FIG. 1 is a block diagram showing a configuration of an image forming apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a state based on power consumption of the image forming apparatus according to Embodiment 1 of the present invention. 3 is a flow chart showing the operation of the operation state statistical means of the image forming apparatus according to the first embodiment of the present invention, and FIG. 4 is a non-volatile memory of the image forming apparatus according to the first embodiment of the present invention. Explanatory drawing which shows the form which holds the operation elapsed time of each state stored, FIG.
FIG. 3 is an explanatory diagram showing power consumption in each operating state of the image forming apparatus according to Embodiment 1 of the present invention.

In FIG. 1, the image forming apparatus according to the present embodiment comprises a controller 101 and an engine 102.

The controller 101 has a function of controlling the image forming apparatus, and the engine 102 has a function of forming an image transferred from the controller 101 on paper according to an instruction from the controller 101.

Here, the controller 101 receives the print data and the status request from the information processing apparatus, and the data transmitting / receiving means 10 for returning a response to the status request.
3, a job analysis unit 104 that analyzes received data and creates print control information, and an interpreter unit 10 that analyzes the received data and converts the received data into intermediate data at a pre-drawing stage called a display list (Display List).
5, rasterizer means 106 for converting the display list into bitmap data, and the bitmap data to the engine 102 to the engine video interface 10.
7, engine control means 108, central control means 109 for controlling the entire controller, operation state statistics means 110 for performing statistics on the control state of the controller, and non-volatile memory for storing statistical information. 11
1 and a power consumption database that stores power consumption information of the control state of the controller (hereinafter, “power consumption DB”).
Say. ) 112, electric power calculation means 113 for calculating the amount of electric power used from the control state information of the controller stored in the non-volatile memory 111 and the power consumption information in the electric power consumption DB 112, and the amount of electric power calculated by this electric power calculation means 113. Is displayed on the operation panel 114.

Next, a power saving state of a general image forming apparatus will be described with reference to FIG.

FIG. 2 shows an operating state based on the power consumption of the image forming apparatus. Here, the state 0 is a steady state and a printable state. State 1 is a printing operation in progress. State 2 is a state in which only the controller 101 is in the power saving state. In state 3, both the controller 101 and the engine 102 are in a power saving state, and the entire image forming apparatus is in a power saving state. The power saving state is managed and controlled by the central control unit 109.

The image forming apparatus initializes when the power is turned on and waits for data reception when the initialization is completed (state 0). When the state of waiting for data reception elapses for a certain time or longer, the controller 101 stops power supply to unnecessary functional parts and shifts to the controller power saving state (state 2). When the controller power saving state continues for a certain period of time or longer, the controller 101 issues a power saving state shift request to the engine 102 to shift the entire image processing apparatus to the power saving state. The engine 102 is the controller 1
When the power saving shift request from 01 is received, the engine shifts to the power saving state (state 3). And the controller 1
The state in which both 01 and the engine 102 are in the power saving state is notified to the user as the power saving state of the image forming apparatus.

The controller 10 returns from the power saving state.
There is a request from No. 1 and a request from the engine 102.

As an operation of returning by a request from the controller 101, when the controller 101 receives data from the information processing device, when the data is a print request, the controller 101 starts supplying power to the stopped function, The controller 102 returns from the power saving state and requests the engine 102 to return from the engine power saving state (state 0).
When the engine 102 receives a request for returning to the normal state from the controller 101, it returns from the engine power saving state,
Ready to print.

The operation of returning by a request from the engine 102 is that the state of the engine 102 has changed with respect to the controller 101 when the state of the engine 102 has changed such as the door of the engine 102 being opened by the user. When the controller 101 receives the state change notification from the engine 102, the controller 101 issues a request for returning from the power saving state to the normal state to the engine 102. When the engine 102 receives a request for returning to the normal state from the controller 101, the engine 102 returns to the normal state and notifies the controller 101 of the state change content. When the controller 101 receives the status change content from the engine 102, the controller 101 displays the content on the operation panel 114. If the controller 101 determines that it is necessary to supply the power to the part where the power supply is stopped based on the state change content, the controller 101 restarts the power supply and restores the controller power saving state (state 0). If it is determined that it is not necessary, the controller 101 does not return from the power saving state (state 2).

Next, the operation state statistical means 110 described above will be described with reference to FIG.

The operation status statistics means 110 is a means for performing statistics on the control status of the controller (which is the operation status of the entire image forming apparatus).

The operation status statistics means 110 is started when the power is turned on (S301), and the started system time and the steady state are recorded in the volatile memory 111 (S301).
302), waiting for a status change message (S30)
3). When the state of waiting for data reception has passed for a certain period of time or more and the state is changed to the controller power saving state which is the state 2, the central control means 109 issues a message notifying the operation state statistical means 110 of the transition to the state 2. Upon receipt of the message, the operating status statistic means 110 determines whether the received message is a status change notification, an elapsed time update message, or not (S304). By grasping the transition, the elapsed time of state 0 is stored in the nonvolatile memory 111.
(S305), the state change to state 2 is recorded in the volatile memory, and a recording response message is issued to the central control means 109 (S306). Central control means 10
9 receives the recording response message from the operation state statistics means 110, and then shifts to state 2. When the message received in step 303 is the elapsed time update message (S307), the elapsed time of the current state 0 is recorded in the non-volatile memory 111 (S308). The elapsed time update message is periodically sent to the operating state statistical means 110.
Issued regularly and records elapsed time on a regular basis. This makes it possible to reduce the difference in elapsed time even if the power is turned off unexpectedly. If the message received in step 303 is neither a status change notification message nor an elapsed time update message, an error message is sent to the central control means 109 (S309). Step 303
From step 309 to step 309 for each status change or for each elapsed time update message that is periodically issued, the operating state of the entire image forming apparatus and its elapsed time are stored in the nonvolatile memory 11.
Save in 1.

It should be noted that the operation state statistics means 110 can be capable of initializing the statistics of the elapsed time of the operation state of the device according to a user's instruction. By doing so, the statistical information can be initialized at the convenience of the user.

Next, referring to FIG. 4, the nonvolatile memory 109
The information format in is explained.

FIG. 4 shows the information in the non-volatile memory, which is 4 bytes from the address 0xF8000000 and is higher in the total elapsed time of the state 0 (Mode0_sum_h).
ig401), and the address 0xF8000
004 to 4 bytes indicate the lower part (Mode0_sum_low402) of the total elapsed time of state 0,
4 bytes from address 0xF8000008, which is the upper time (Mo
de0_now_high403), which is 4 bytes from the address 0xF800000C, and is the lower (Mode) of the elapsed time after power-on from the current power-on of state 0 in 4 bytes.
0_now_low 404) is shown. Similarly, at the address 0xF8000010, the upper part (Mode1_sum_high) of the total elapsed time of the state 1 is 4 bytes.
405) and the address 0xF8000014.
4 bytes from the bottom of the total elapsed time of state 1 (Mo
de1_sum_low406), which is 4 bytes from the address 0xF8000018, and is the upper order (Mode1) of the elapsed time after power-on from the current power-on in state 1 in 4 bytes.
_Now_high 407) and address 0
Lower byte (Mode1_n) of the elapsed time after power-on from the current power-on in state 1 in 4 bytes from xF800001C.
ow_low 408), and the address 0xF8
The upper 4 bytes (Mode2_sum_high409) of the total elapsed time of the state 2 is indicated by 4 bytes from 000020, and the lower portion (Mode 2_sum) of the total elapsed time of the state 2 is indicated by 4 bytes from the address 0xF8000024.
_Low410) at the address 0xF800
4 bytes from 0028, which is the upper time (Mode2_now_hi) of the elapsed time after the current power-on from the power-on of the state 2
gh411) at the address 0xF80000.
4 bytes from 2C, the lower time (Mode2_now_low4) of the elapsed time after power-on of this time from power-on of state 2
12), which is 4 bytes from the address 0xF8000030 and indicates the upper part of the total elapsed time in state 3 (Mod
e3_sum_high 413), which is 4 bytes from the address 0xF8000034 and is lower than the total elapsed time of state 3 (Mode3_sum_low41).
4), which is 4 bytes from the address 0xF8000038, and is the high-order elapsed time after power-on since the current power-on in state 3 (Mode3_now_high 415).
4 bytes from the address 0xF800003C and indicates the lower order (Mode3_now_low 416) of the elapsed time after power-on from the current power-on in state 3 in 4 bytes.

Step 30 described above with reference to FIG.
Recording the elapsed time at the time of the state change in step 5 and step 308
In the periodical recording of the elapsed time, the total elapsed time and the elapsed time after the power is turned on are both updated. The total elapsed time can be reset by a user's instruction, and the elapsed time of each state is added regardless of whether the power is on or off unless reset by the user. The unit of elapsed time is the system clock unit, which is usually about 10 msec.

Next, the information format in the power consumption DB 112 will be described with reference to FIG.

The power consumption DB 112 is one in which the power consumption is measured in advance in each operating state and the measurement result is stored as a database. In FIG. 5, Mode
0_Pow 501 is the power consumption at Mode 0, Mod
e1_Pow502 is the power consumption at the time of Mode1, Mo
de2_Pow 503 is the power consumption amount in Mode 2, M
ode3_Pow 504 is represented by the power consumption amount at the time of Mode 3, and the unit is the power consumption amount in system clock units.

When the user gives an instruction to display the power consumption so far, the central control means 109 causes the power calculation means 1 to operate.
The power calculation means 113 is instructed to calculate the power consumption amount.
Is the total elapsed time Mode0_sum_high401, Mode0_ in the state 0 in the nonvolatile memory 111.
Sum_low 402 and state 0 in the power usage DB 112
Power consumption in state 0 is calculated from Mode0_Pow501, and power consumption is calculated in the same manner as in the case of state 0 from state 1 to state 3, and the calculated total power consumption from state 0 to state 3 is calculated. To the central control means 109.

The central control means 109 is a power calculation means 11
The power consumption amount notified from 3 is notified to the panel control unit 115, and the panel control unit 115 displays the power consumption amount on the operation panel 114. When the user gives an instruction to display the power consumption amount after the power is turned on, the central control means 109 instructs the power calculation means 113 to calculate the power consumption amount after the power is turned on, and the power calculation means 113 is a non-volatile memory. Time 0 after power-on in state 0 in 111 Mode0
_Now_high403, Mode0_now_lo
The power consumption after power-on of the state 0 is calculated from the power consumption Mode0_Pow501 in the state 0 in the power consumption DB 112 and w404, and the power consumption after power-on is calculated in the states 1 to 3 as well as the state 0, The calculated total power consumption after power-on from state 0 to state 3 is calculated and notified to the central control means 109. The central control unit 109 notifies the panel control unit 115 of the power consumption after power-on notified from the power calculation unit 113, and the panel control unit 115 displays the power consumption after power-on on the operation panel 114.

As described above, according to the present embodiment, the power consumption is calculated and displayed, so that the user can know the power consumption of the image forming apparatus. Become.

Further, since the power consumption DB 112 is configured by the value obtained by measuring the power consumption in each operation state in advance,
Since it is not necessary to measure the power consumption, the processing can be simplified, and the desired function can be realized with an inexpensive configuration that does not require hardware resources.

(Second Embodiment) FIG. 6 is a block diagram showing the arrangement of an image forming apparatus according to the second embodiment of the present invention.

In FIG. 6, the image forming apparatus according to this embodiment comprises a controller 101 and an engine 102.

The controller 101 has a function of controlling the image forming apparatus, and the engine 102 has a function of forming an image transferred from the controller 101 on paper according to an instruction from the controller 101.

The controller 101 receives the print data and the status request from the information processing device and the data transmitting / receiving means 103 for returning a response to the status request, the job analyzing means 104 for analyzing the received data and creating the print control information. An interpreter means 105 for analyzing the received data and converting it into intermediate data at a pre-drawing stage called a display list (Display List);
Rasterizer means 106 for converting the display list into bitmap data, engine control means 108 for transmitting the bitmap data to the engine 102 via the engine video interface 107, central control means 109 for controlling the entire controller, control of the controller. Operating state statistical means 110 for performing time-series statistics
And a non-volatile memory 111 for storing statistical information,
Power consumption DB 112 that stores power consumption information of the control state of the controller, and control state information and power consumption DB 112 of the controller that is stored in the nonvolatile memory 111.
And a panel control unit 115 for displaying the power amount calculated by the power calculation unit 113 on the operation panel 114.
And a power unit price DB 601 for recording the power unit price, and a power charge calculation means 112 for calculating a power consumption charge from the power consumption amount and the power unit price DB 601.

The power unit price DB 601 can be input from the operation panel 113, and the charge per 1 kW can be set from the panel. In addition, when the user gives an instruction to display the power consumption charge so far, the central control unit 109 instructs the power calculation unit 113 to calculate the power consumption amount, and the power calculation unit 113 stores the state in the non-volatile memory 111. Total elapsed time at 0 o'clock Mode0_sum_h
The power consumption Mode0 in the state 401 in the power consumption DB 112 and the light 401, Mode0_sum_low 402
The power consumption of the state 0 is calculated from the _Pow 501, the power consumption of the states 1 to 3 is calculated in the same manner as the state 0, the total power consumption of the calculated states 0 to 3 is calculated, and the central control means 109 is used. To notify. The central control means 109 notifies the power consumption amount notified from the power calculation means 113 to the charge calculation means 602 and instructs the charge calculation. The power charge calculation means 602 calculates the power consumption charge from the power consumption amount notified from the central control means 109 and the power unit price in the power unit price DB, and notifies the central control means 109 of the power consumption charge. The central control unit 109 notifies the notified power consumption charge to the panel control unit 115, and the panel control unit 115 displays the power consumption amount on the operation panel 114.

In the present embodiment described above, the operation panel is used as the interface with the user, but the present invention is not limited to this, and an information acquisition application incorporated in the information processing apparatus may be used.

[0051]

As described above, according to the present invention, the power consumption is calculated and displayed.
An effective effect that the user can know the power consumption of the image forming apparatus is obtained.

Further, if the power consumption database is configured in advance with the value of the power consumption measured in each operating state, it is not necessary to measure the power consumption, so that the processing can be simplified and the hardware resources are not necessary and the cost is low. The effective effect that the desired function can be realized with such a configuration is obtained.

If the operating state statistical means records the elapsed time periodically, it is possible to reduce the error in the elapsed time even if the power is turned off unexpectedly.

If the statistics of the elapsed time of the operating state of the operating state statistics means can be initialized by a user's instruction,
An effective effect that the statistical information can be initialized according to the convenience of the user can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an image forming apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a state based on power consumption of the image forming apparatus according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the operation state statistical means of the image forming apparatus according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a format for holding an operation elapsed time of each state stored in the nonvolatile memory of the image forming apparatus according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing power consumption in each operation state of the image forming apparatus according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of an image forming apparatus according to a second embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a conventional image forming apparatus.

[Explanation of symbols]

101 Controller 102 Engine 103 Data Transmission / Reception Means 104 Job Analysis Means 105 Interpreter Means 106 Rasterizer Means 108 Engine Control Means 109 Central Control Means 110 Central Operating Means 110 Statistic Means 111 Nonvolatile Memory 112 Electric Power Usage DB 113 Electric Power Means 114 Operation Panel 115 Panel Control Means 401 Upper of total elapsed time of state 0 402 Lower of total elapsed time of state 0 403 Upper of elapsed time after current power on of state 0 404 Lower lower of elapsed time after current power on of state 0 501 Power consumption 502 in steady state Power consumption during printing operation 503 Power consumption during controller power saving state 504 Power consumption during controller power saving state

Claims (6)

[Claims] 1. An image forming apparatus that interprets image information created by an information processing apparatus, develops it into bitmap data, and outputs the bitmap data, comprising central control means for managing the operating state of the image forming apparatus, and the operating state and An operating state statistical means for recording statistics of the elapsed time of the operating state, a power consumption database for holding power consumption information for each operating state, information statistically stored by the operating state statistics means and the power consumption database An image forming apparatus comprising: a power calculation unit that calculates the amount of power used using power consumption information; and a power display unit that displays the amount of power calculated by the power calculation unit. 2. An electric power unit price input means for inputting an electric power unit price, a power unit price database for recording the electric power unit price, an electric power unit price used for the image forming apparatus using the electric power unit database and the electric power unit price database. The image forming apparatus according to claim 1, further comprising: a power charge calculation unit that performs the power charge calculation; and a power charge display unit that displays the power charge calculated by the power charge calculation unit. 3. The image forming apparatus according to claim 1, wherein the power consumption database is configured by a value obtained by measuring power consumption in each operation state in advance. 4. The image forming apparatus according to claim 1, wherein the operation state statistics means records the elapsed time periodically. 5. The image forming method according to claim 1, wherein the operation state statistics means is capable of initializing the statistics of the elapsed time of the operation state by a user's instruction. apparatus. 6. A method for measuring power consumption in an image forming apparatus, which interprets image information created by an information processing apparatus, develops it into bitmap data, and outputs the bitmap data, the operating state of the image forming apparatus and the elapsed time of the operating state. A power consumption measuring method characterized by recording the statistics of, calculating the power consumption from the statistics and the power consumption corresponding to the operating state, and displaying the calculated power consumption.