JP2011078026A - Personal digital assistant, method of saving power of the same, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a personal digital assistant capable of efficient saving power by controlling power consumption in accordance with a life style of a user, and increasing usable time, and to provide a method of saving power of the same and a program. <P>SOLUTION: The personal digital assistant including an operation unit used for executing operation by a user and a function of measuring the current time includes: an operation time information recording/storing means to record and store the time the operation unit is operated as operation time information; a use frequency information creation/storage means to sort the operation time information on a predetermined time zone basis based on the time shown by the operation time information, and create and store the volume of the operation time information for each time zone as use frequency information; and a power saving control means to control power to a predetermined value for each time zone based on the use frequency information and a predetermined value related to the volume of the operation time information. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable information terminal capable of extending the usable time by realizing efficient automatic control of power consumption, and a power saving method and program thereof.

  At present, various portable information terminals such as cellular phones, PHS (Personal Handyphone System), PDA (Personal Data Assistance, Personal Digital Assistants), portable music players, portable game machines, and the like have become widespread. ing.

  Such mobile information terminals tend to be equipped with new functions one after another. For this reason, the problem that the power consumption increases and the time during which the user can use the terminal is reduced.

  From such a problem, it is important to realize power saving by efficiently controlling power consumption in a portable information terminal. For example, Patent Document 1 discloses a technique for increasing the standby time of a terminal battery according to a user's communication network usage history in a mobile communication terminal.

JP 2005-507604 A

  However, the technique of Patent Document 1 has a problem that power consumption cannot be controlled and power saving cannot be realized when communication is not used in a terminal.

  The present invention has been made in view of the above circumstances, and by controlling power consumption according to the user's lifestyle, it is possible to achieve efficient power saving and to increase the usable time. An object of the present invention is to provide a portable information terminal capable of performing the above, a power saving method thereof, and a program thereof.

  In order to achieve such an object, the present invention provides, as a first aspect, a portable information terminal that includes an operation unit that is operated by a user and that has a function of measuring the current time. The operation time information is recorded and stored as operation time information, and the operation time information is classified for each predetermined time zone based on the time indicated by the operation time information. Based on the usage frequency information generation and storage means for generating and storing the amount of operation time information as usage frequency information, the usage frequency information, and a predetermined value associated with the amount of operation time information. Power saving control means for controlling power to a predetermined value for each band is provided.

  The present invention provides, as a second aspect, a power saving method for a portable information terminal that includes an operation unit that is operated by a user and that has a function of measuring the current time when the operation unit is operated. The step of recording and storing the time as operation time information, and classifying the operation time information for each predetermined time zone based on the time indicated by the operation time information, and the amount of the operation time information for each time zone is used The power is controlled to a predetermined value for each time zone based on the step of generating and storing the information, the usage frequency information, and a predetermined value associated with the amount of operation time information. And a step.

  As a third aspect, the present invention is a program for causing a computer having a function of measuring the current time to have an operation unit that is operated by a user, when the operation unit is operated. A process of recording and storing time as operation time information, and classifying the operation time information for each predetermined time zone based on the time indicated by the operation time information, and determining the amount of operation time information for each time zone as the usage frequency The power is controlled to a predetermined value for each time zone based on a process that is generated and stored as information, usage frequency information, and a predetermined value associated with the amount of operation time information. And causing the computer to execute the processing.

  ADVANTAGE OF THE INVENTION According to this invention, the efficient power saving according to a user's lifestyle can be implement | achieved, and it becomes possible to lengthen usable time.

It is a block diagram which shows an example of the hardware constitutions of the portable information terminal which concerns on one Embodiment of this invention. It is a block diagram which shows an example (1st Embodiment) of a software function structure of the portable information terminal which concerns on one Embodiment of this invention. It is a flowchart which shows an example (1st Embodiment) of operation | movement of the portable information terminal which concerns on one Embodiment of this invention. It is a figure which shows an example of the usage frequency information produced | generated with the portable information terminal which concerns on one Embodiment of this invention. It is a block diagram which shows an example (2nd Embodiment) of the software function structure of the portable information terminal which concerns on one Embodiment of this invention. It is a flowchart which shows an example (2nd Embodiment) of operation | movement of the portable information terminal which concerns on one Embodiment of this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments (embodiments) for carrying out the present invention will be described in detail with reference to the accompanying drawings. A mobile phone will be described below as an embodiment of the portable information terminal of the present invention. In addition to the cellular phone, the portable information terminal of the present invention can be applied to, for example, portable personal computers such as PHS, PDA, and netbook, portable music players, and portable game machines.

  A hardware configuration of the mobile phone according to the present embodiment is shown in FIG. As shown in FIG. 1, the mobile phone of this embodiment includes a CPU (Central Processing Unit) 1, a ROM (Read Only Memory) 2, a RAM (Random Access Memory) 3, a communication unit 4, a display unit 5, and an operation unit 6. A transmitter / receiver unit 7 and a bus 8.

  The CPU 1 is connected to each unit in the mobile phone via the bus 8 and controls the operation of the entire mobile phone according to the read program to realize various functions.

  The ROM 2 is a storage medium that stores fixed data such as programs. CPU1 reads a program from ROM2, and controls operation | movement of a mobile telephone according to the program.

  The RAM 3 is a working storage medium that stores data temporarily required for the CPU 1 to execute a program read from the ROM 2.

  The communication unit 4 is a circuit that performs a telephone function (incoming call, outgoing call, call) and an electronic mail function (reception and transmission of mail) by radio. The communication unit 4 includes an antenna for enabling wireless communication via a wireless communication network including a base station or the like.

  The display unit 5 is a device that displays various information such as characters and images. Examples of the display unit 5 include a liquid crystal display.

  The operation unit 6 is a key or button used when the user performs an operation. Examples of the operation unit 6 include a numeric keypad, a cursor key, and a side key.

  The transmitter / receiver unit 7 inputs voice to the other party or outputs the other party's voice. Examples of the transmission / reception unit 7 include a microphone and a speaker.

  The bus 8 is a path for data and signals exchanged between the units shown in FIG.

[First Embodiment]
An example of a software function of a mobile phone having the hardware configuration of FIG. 1 will be described with reference to FIG. As shown in FIG. 2, the mobile phone of this embodiment includes an operation time information recording unit 11, an operation time information storage unit 12, a usage frequency information generation unit 13, a usage frequency information storage unit 14, and a power saving control unit 15. .

  The operation time information recording unit 11 always measures the current time, records the time when the operation unit 6 is operated by the user, and stores the recorded time in the operation time information storage unit 12 as operation time information. . The operation time information recording unit 11 is realized by the CPU 1 shown in FIG.

  By the way, operations performed by the user (hereinafter referred to as user operations) include operations of pressing keys and buttons instantaneously and continuously (short-time operations), and continuously on the touch panel and touch pad for a certain period of time. There is a tracing operation (long operation). An example of a short-time operation is an operation of inputting characters or the like when composing an email, and an example of a long-time operation is an operation of scrolling the screen or an operation of moving a pointer on the screen. . In the case of a short time operation, the operation time information recording unit 11 records the time every time an operation is performed. On the other hand, in the case of a long time operation, the operation time information recording unit 11 records the time at predetermined intervals while the operation is continuously performed. This predetermined interval may be, for example, an average value of the intervals between operations performed continuously during a short-time operation.

  The operation time information storage unit 12 stores the operation time information recorded by the operation time information recording unit 11. The operation time information storage unit 12 is realized by the RAM 3 shown in FIG.

  The usage frequency information generation unit 13 analyzes and learns based on the operation time information stored in the operation time information storage unit 12, generates usage frequency information indicating the usage frequency of the user's mobile phone, and stores the usage frequency information. Stored in section 14. The usage frequency information generation unit 13 is realized by the CPU 1 shown in FIG.

  The usage frequency information is, for example, content indicating how much operation time information is provided for each time zone (for example, every other hour) of the day. Therefore, the usage frequency information generation unit 13 reads the operation time information stored in the operation time information storage unit 14, identifies the time zone based on the recorded time, and classifies the time zone. Thereby, the amount of operation time information is determined for each time slot. Then, the usage frequency information generation unit 13 compares the classified amount of operation time information with a predetermined threshold value for each time period, and determines the usage frequency. Here, as an example, two threshold values A and B are defined (threshold value A> threshold value B). These threshold values A and B are set in advance in the usage frequency information generation unit 13. The usage frequency information generation unit 13 determines that the usage frequency is high (many) if the amount of operation time information is greater than or equal to the threshold A in each time zone, and if the amount of operation time information is less than the threshold B, the usage frequency is low (low). If it is more than threshold B and less than A, it is judged that the use frequency is normal (medium). Then, the usage frequency information generation unit 13 generates and stores usage frequency information in which a determination result (any one of high, medium, and low) is associated with each time zone.

  FIG. 4 shows an example of usage frequency information. As shown in FIG. 4, the usage frequency is classified into three levels (many, medium, and small) for every time slot. In the example of FIG. 4, the usage frequency is “medium” or “many” in the time zone from 8:00 am to 14:00 pm and the time zone from 19:00 pm to midnight. On the contrary, the usage frequency is “low” in the time zone from midnight to early morning 8:00 and the time zone from 14:00 in the early afternoon to 19:00 in the evening. In this way, the usage frequency information indicates the usage frequency of the mobile phone that reflects the lifestyle of the user.

  The timing of generating (updating) the usage frequency information may be performed, for example, at a date and time predetermined by the user (the user can change to a desired date and time at any time). If the user wants to update the usage frequency information every day, set the date to “Daily” and set the time to “23:59. The usage frequency information is generated (updated), and it is possible to specify one or more predetermined dates and days of the week for the set dates, and these dates and times are stored in advance in the usage frequency information generation unit 13. For this reason, since the usage frequency information generation unit 13 needs to recognize the set date and time, it always measures the current time and manages the current date and time.

  In the above example, the time period included in the usage frequency information is one day, but is not limited thereto. Moreover, although the time slot | zone was made into every 1 hour, it is not limited to this.

  The usage frequency information storage unit 14 stores the usage frequency information generated by the usage frequency information generation unit 13. The usage frequency information storage unit 14 is realized by the RAM 3 shown in FIG.

  The power saving control unit 15 reads the usage frequency information stored in the usage frequency information storage unit 14 and controls the power supplied based on the read usage frequency information, that is, according to the usage frequency for each time period. I do. The power saving control unit 15 is realized by the CPU 1 shown in FIG.

  It is assumed that the value of power to be controlled is predetermined for each usage frequency indicated in the usage frequency information. For example, a value X is defined when the usage frequency is “high”, a value Y when the usage frequency is “medium”, and a value Z when the usage frequency is “low” (value X> value Y> value). Z). These values X, Y, and Z are set in advance in the power saving control unit 15. The power saving control unit 15 controls the power to one of the above values every time the time zone changes. For this reason, the power saving control unit 15 needs to recognize a change in the time zone, and thus always measures the current time.

  Note that the power saving control unit 15 performs control so that power saving is prioritized and the power consumption of the value Z is maintained even if a user operation is performed when the power control is performed to the value Z, for example. In this case, as a notification to the user, the power saving control unit 15 controls the display unit 5 to display that the power control is being performed, and when the operation unit 6 receives a predetermined key operation. Control to cancel power saving.

  An example of the operation of the mobile phone having the software configuration of FIG. 2 (one embodiment of the power saving method of the portable information terminal of the present invention) will be described with reference to FIG.

  When a user operation is performed on the operation unit 6, the operation time information recording unit 11 records the measured time and stores it in the operation time information storage unit 12 as operation time information (step S1).

  The usage frequency information generation unit 13 refers to the date and time being measured, and determines whether or not a predetermined time (date and time) has been reached (step S2). The predetermined time is an example of timing for generating (updating) use frequency information.

  When the predetermined time is not reached (step S2 / NO), the usage frequency information is not generated (updated) by the usage frequency information generation unit 13, and the operation time information is recorded and stored by the operation time information recording unit 11. Is performed (step S1). That is, the operation time information recording unit 11 continues to record and store the operation time information until a predetermined time is reached.

  When the predetermined time is reached (step S2 / YES), the usage frequency information generation unit 13 starts generating (updating) the usage frequency information (step S3). First, the usage frequency information generation unit 13 reads all the operation time information stored in the operation time information storage unit 14, and identifies the time zone based on the recorded time for all the read operation time information. And classify them into each time zone. Thereby, operation time information is allocated for each time zone, and the amount of operation time information for each time zone is determined. Next, the usage frequency information generation unit 13 compares the amount of operation time information with a predetermined threshold for each time period, and determines the usage frequency. For example, when there are two threshold values A and B as described above, the amount of operation time information is compared with the threshold values A and B for each time period. As a result of this comparison, the usage frequency (one of high, medium, or low) is determined for each time slot. Next, the usage frequency information generation unit 13 generates usage frequency information (for example, FIG. 4) in which the determined usage frequency (any one of high, medium, and low) is associated with each time zone. Save in the storage unit 14.

  The power saving control unit 15 reads the usage frequency information stored in the usage frequency information storage unit 14, and controls the power to be supplied based on the read usage frequency information (step S4). That is, the power saving control unit 15 controls the power to a predetermined value according to the use frequency for each time zone.

  As described above, according to the present embodiment, by performing power control automatically using the usage frequency information reflecting the user's lifestyle, efficient power saving according to the user's lifestyle can be achieved. This can be realized, and the time that the user can use the terminal can be extended.

[Second Embodiment]
In the first embodiment, the power saving effect based on the user operation can be realized, but the power saving effect based on the notification from the outside (the incoming call or the reception of the mail) cannot be realized. Therefore, in the present embodiment, a power saving effect based on a user operation and based on a notification from the outside is realized.

  An example of software functions of a mobile phone having the hardware configuration of FIG. 1 will be described with reference to FIG. As shown in FIG. 5, the mobile phone of this embodiment includes an operation time information recording unit 11, an operation time information storage unit 12, a usage frequency information generation unit 13, a usage frequency information storage unit 14, a power saving control unit 15, and a reception. A number counting unit 16 is included. The difference from the configuration of the first embodiment (FIG. 2) is that a reception count unit 16 is added. The operations of the units other than the power saving control unit 15 and the reception frequency counting unit 16 are the same as those in the first embodiment and have already been described.

  The reception count unit 16 counts every time a mail is received via the communication unit 4. The count result is notified to the power saving control unit 15. In the present embodiment, an example of notification from the outside that is counted by the reception frequency counting unit 16 will be described as the number of received mails. However, it may be the number of incoming calls. The number of incoming calls may be both. The reception count unit 16 is realized by the CPU 1 shown in FIG.

  The power saving control unit 15 performs the following control in addition to the control described in the first embodiment. The power saving control unit 15 receives the notification of the count result from the reception number counting unit 16 to recognize how many times the mail has been received in each time zone. The power saving control unit 15 controls to notify the user of mail reception only when the number of received mails currently recognized exceeds a predetermined value according to the usage frequency for each time period. To do. The power saving control unit 15 is realized by the CPU 1 shown in FIG.

  The power saving control unit 15 is set with a predetermined value corresponding to each use frequency. For example, when the usage frequency is “many”, “medium”, and “small”, the number of receptions corresponding to “many” is 1 time, the number of receptions corresponding to “medium” is m times, and the reception number corresponding to “low” The number of times is determined to be n times (n> m> l). These reception counts l, m, and n are preset in the power saving control unit 15. When the power saving control unit 15 recognizes that the time zone has changed based on the time being measured, the power saving control unit 15 resets the number of times the currently recognized mail is received.

  An example of the operation of the mobile phone having the software configuration of FIG. 5 (one embodiment of the power saving method of the portable information terminal of the present invention) will be described with reference to FIG. Note that steps S11 to S13 in FIG. 6 are the same as the operations in steps S1 to S3 (FIG. 3) of the first embodiment, and thus description thereof is omitted here.

  The power saving control unit 15 reads the usage frequency information stored in the usage frequency information storage unit 14, controls the power to be supplied based on the read usage frequency information, and count results from the reception frequency counting unit 16. Based on the above, the mail reception notification is controlled (step S14). Since the power control has already been described in the first embodiment, the control of the mail reception notification will be described.

  The power saving control unit 15 receives the currently recognized mail reception number based on the count result of the reception number counting unit 16 and one of the predetermined reception numbers l, m, and n (corresponding to the current time zone). (Depending on frequency of use). As a result of the comparison, the power saving control unit 15 performs control so as to notify the user that mail has been received only when the number of received mails currently being recognized exceeds a predetermined number of receptions. In other words, for example, when the number of times of reception n determined in advance corresponding to the usage frequency “low” is 15, and the time of use is “low”, the number of times of reception of mail must be 16 times, It will be controlled not to be notified of mail reception. Therefore, the power consumption associated with the notification of mail reception can be saved.

  As described above, according to the present embodiment, in addition to the power saving effect based on the user operation described in the first embodiment, the power saving effect based on the notification from the outside can be realized.

[Third Embodiment]
In the first and second embodiments, the use frequency is determined based on the user operation. However, there are cases where the use frequency is high (the use time is long) even if the number of operations is small or the operation time is short. is there. For example, when viewing a video using 1Seg, viewing a still image using a slide show, or watching music using a music player, etc., although there is almost no user operation, it can be said that it is frequently used because the application startup time is long. . Therefore, in the present embodiment, not only the user operation but also the application activation time is used as a material for determining the usage frequency, so that the usage frequency for each time zone can be determined more accurately.

  Since the basic configuration and operation of this embodiment are the same as those of the first embodiment, description thereof is omitted here. Only different points will be described below.

  As described above, the operation time information recording unit 11 records time when a user operation is performed, and determines whether a predetermined application (hereinafter referred to as an application) is activated by the operation. When the application is not activated, the operation time information recording unit 11 stores the recorded time as operation time information. When the application is activated, the operation time information recording unit 11 stores the recorded time as operation time information, and measures the time while the application is activated. Note that time is not recorded for operations performed while the application is running (operations other than the operation for ending the application). That is, the recording target is switched to the application activation time. When the user operation is performed and the activated application is terminated, the operation time information recording unit 11 records the time and stores it as operation time information, and sets the time during which the application was activated as the application activation time. Information is stored in the operation time information storage unit 12 as information.

  The usage frequency information generation unit 13 analyzes and learns based on the operation time information and application activation time information stored in the operation time information storage unit 12 to generate usage frequency information. save. In the present embodiment, the usage frequency information is, for example, contents indicating how much the amount (length) of application activation time information for each time period (for example, every other hour) of the day is. First, the usage frequency information generation unit 13 reads the operation time information stored in the operation time information storage unit 14. This reading may be performed only at the time when the application is started, but both the time when the application is started and the time when the application is ended are preferable. Next, the usage frequency information generation unit 13 identifies a time zone based on the time recorded in the read operation time information. Next, the usage frequency information generation unit 13 reads and reads the application activation time information (measured when the previously read operation time information is recorded) stored in the operation time information storage unit 14. The application activation time information is classified into each identified time zone. As a result, the amount of application activation time information is determined for each time period (if the application activation time is long, it may span multiple time periods). Then, the usage frequency information generation unit 13 compares the amount of application activation time information with a predetermined threshold for each time zone, and determines the usage frequency. Here, as an example, it is assumed that threshold value C and threshold value D are determined (threshold value C> threshold value D). These threshold values C and D are set in advance in the usage frequency information generation unit 13. The usage frequency information generation unit 13 determines that the usage frequency is high (many) if the amount of application activation time information is greater than or equal to the threshold C in each time zone, and if the amount is less than the threshold D, the usage frequency is low (low). If the threshold value is equal to or greater than the threshold value D and less than C, the use frequency is determined to be normal (medium). And the usage frequency information generation part 13 produces | generates and preserve | saves the usage frequency information which matched the determination result (any one of many, medium, and small) for every time slot | zone.

  Since the subsequent operations are the same as those in the first and second embodiments, description thereof is omitted here. In the above description, only the determination of the usage frequency based on the application activation time information has been described, but this is performed when the operation time information is not stored in a predetermined time zone. When the operation time information is stored, the use frequency is determined based on the operation time information. That is, the usage frequency is determined for each time period based on either the operation time information or the application activation time information.

  As described above, according to the present embodiment, the use frequency described in the first and second embodiments can be used more accurately by considering not only the user operation but also the application activation time. I can judge. Therefore, a more accurate user lifestyle can be reflected, and more efficient power saving can be realized.

  As mentioned above, although embodiment of this invention was described, it is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the summary.

  For example, the operation in the above-described embodiment can be executed by hardware, software, or a combined configuration of both.

  When executing processing by software, a program in which a processing sequence is recorded may be installed and executed in a memory in a computer incorporated in dedicated hardware. Or you may install and run a program in the general purpose computer which can perform various processes.

  For example, the program can be recorded in advance on a hard disk or a ROM (Read Only Memory) as a recording medium. Alternatively, the program is temporarily or permanently stored on a removable recording medium such as a CD-ROM (Compact Disc Read Only Memory), an MO (Magneto optical) disc, a DVD (Digital Versatile Disc), a magnetic disc, or a semiconductor memory. It can be stored (recorded). Such a removable recording medium can be provided as so-called package software.

  The program may be wirelessly transferred from the download site to the computer in addition to being installed on the computer from the removable recording medium as described above. Or you may wire-transfer to a computer via networks, such as LAN (Local Area Network) and the internet. The computer can receive the transferred program and install it on a recording medium such as a built-in hard disk.

  In addition to being executed in time series in accordance with the processing operations described in the above embodiment, the processing capability of the apparatus that executes the processing, or a configuration to execute in parallel or individually as necessary Is also possible.

  The present invention can also be applied to apparatuses / devices and systems other than portable information terminals.

1 CPU
2 ROM
3 RAM
DESCRIPTION OF SYMBOLS 4 Communication part 5 Display part 6 Operation part 7 Transmission / reception part 8 Bus 11 Operation time information recording part 12 Operation time information storage part 13 Usage frequency information generation part 14 Usage frequency information storage part 15 Power saving control part 16 Reception frequency count part

Claims (7)

A portable information terminal having an operation unit that is operated by a user and having a function of measuring the current time,
An operation time information recording / storing means for recording and storing the time when the operation unit is operated as operation time information;
Usage frequency information generation for classifying the operation time information for each predetermined time zone based on the time indicated by the operation time information, and generating and storing the amount of the operation time information for each time zone as usage frequency information Storage means;
Power saving control means for controlling power to the predetermined value for each time period based on the usage frequency information and a predetermined value associated with the amount of the operation time information;
A portable information terminal comprising: A communication unit for performing voice or document wireless communication with another terminal, and a reception frequency counting unit that performs counting when the communication unit receives a signal from the other terminal,
The power saving control means includes:
The number of receptions is recognized for each time period based on the count result of the reception number counting means, and the recognized number of receptions exceeds a predetermined number of receptions associated with the amount of the operation time information. 2. The portable information terminal according to claim 1, wherein the mobile information terminal is controlled to notify the user of reception by the communication unit. The operation time information record storage means includes:
When the operation unit is operated instantaneously and continuously, the time is recorded every time the operation is performed, and is stored as the operation time information.
3. When the operation unit is operated continuously for a predetermined time, time is recorded at a predetermined interval while the operation is being performed, and is stored as the operation time information. The portable information terminal described. The operation time information record storage means includes:
Record the time when the operation unit is operated as the operation time information, determine whether a predetermined application is activated by the operation,
As a result of the determination, when a predetermined application is activated, the time during which the application is activated is measured and stored as application activation time information,
The usage frequency information generation and storage means includes:
A time zone is identified based on the time indicated by the operation time information, the application activation time information is classified into the identified time zone, and the amount of the application activation time information for each time zone is used as the usage frequency information. The portable information terminal according to any one of claims 1 to 3, wherein the portable information terminal is generated and stored. The operation time information record storage means includes:
The portable information terminal according to any one of claims 1 to 4, wherein the operation time information is continuously recorded and stored until a predetermined date and time when the usage frequency information is generated. A power saving method for a portable information terminal that includes an operation unit that is operated by a user and has a function of measuring the current time,
Recording and storing the time when the operation unit is operated as operation time information;
Classifying the operation time information for each predetermined time period based on the time indicated by the operation time information, and generating and storing the amount of the operation time information for each time period as usage frequency information;
Controlling power to the predetermined value for each time period based on the usage frequency information and a predetermined value associated with the amount of the operation time information;
A power saving method for a portable information terminal. A program for causing a computer having a function of measuring the current time to include an operation unit that is operated by a user,
Processing to record and save the time when the operation unit is operated as operation time information;
A process of classifying the operation time information for each predetermined time period based on the time indicated by the operation time information, and generating and storing the amount of the operation time information for each time period as usage frequency information;
Based on the usage frequency information and a predetermined value associated with the amount of the operation time information, a process of controlling the power to the predetermined value for each time period;
A program that causes a computer to execute.

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