JP7107818B2 - ELECTRONIC DEVICE, CONTROL DEVICE, CONTROL METHOD FOR ELECTRONIC DEVICE, AND CONTROL PROGRAM - Google Patents

Description

The present invention relates to an electronic device, a control device, a control method for an electronic device, and a control program.

Conventionally, there is known a technique of controlling the operating frequency of a processor in order to suppress power consumption. Patent Document 1 discloses a technique for controlling the operating frequency of a processor according to the processing performance required for processing an application executed by the processor.

Japanese Patent Application Laid-Open No. 2014-182512 (published on September 29, 2014)

However, in the conventional technology as described above, since the operating frequency of the processor is determined based on the processing performance required for processing the application, even an application that is frequently used by the user requires low processing performance. is operated at a low operating frequency. Therefore, there is a problem that user convenience may be impaired.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to realize an electronic device that does not impair user convenience while suppressing power consumption.

To solve the above problems, an electronic device according to an aspect of the present invention includes a control unit that processes various data, a memory that stores various data processed by the control unit, an operating frequency of the control unit, and the at least a first table in which operating frequencies of the memory are associated in a first correspondence relationship, and a second table in which the operating frequencies of the control section and the operating frequencies of the memory are associated in a second correspondence relationship; and a table storage unit that stores the Accordingly, using a table switching process for switching the reference table to be referred to for determining the operating frequency of the memory from the first table to the second table, and using the reference table switched by the table switching process, and a memory operating frequency determination process for determining the operating frequency of the memory.

A control device according to an aspect of the present invention includes a control unit that processes various data, a memory that stores various data processed by the control unit, an operating frequency of the control unit, and an operating frequency of the memory. A table storage unit storing at least a first table in which the operating frequency of the control unit and the operating frequency of the memory are associated in a second correspondence relationship. and a control device for controlling an electronic device, the control device comprising: a usage state acquisition unit that acquires a usage state of the electronic device; using a table switching unit for switching the reference table to be referred to for determining the operating frequency of the memory from the first table to the second table, and the reference table switched by the table switching unit, and a memory operating frequency determining unit that determines the operating frequency of the memory.

A control method for an electronic device according to an aspect of the present invention includes a control unit that processes various data, a memory that stores various data processed by the control unit, an operating frequency of the control unit, and an operating frequency of the memory. and are associated in a first correspondence relationship, and at least a second table in which the operating frequency of the control unit and the operating frequency of the memory are associated in a second correspondence relationship. A control method for controlling an electronic device comprising: a table storage unit, comprising: a usage state acquisition step of acquiring a usage state of the electronic device; a table switching step of switching a reference table referred to for determining an operating frequency of the memory from the first table to the second table; and a memory operating frequency determining step of determining the operating frequency of the memory.

According to one aspect of the present invention, it is possible to realize an electronic device that does not impair user convenience while suppressing power consumption.

1 is a block diagram showing the configuration of an electronic device according to Embodiment 1; FIG. It is a figure which shows an example of the use condition database of the said electronic device. It is a figure which shows the reference table of the said electronic device. (a) shows the first table, and (b) shows the second table. It is a flow chart showing an example of the flow of memory operating frequency determination processing executed by the electronic device. FIG. 10 is a diagram showing an example of calculation of the application usage frequency of the electronic device according to Modification 1 of Embodiment 1; FIG. 10 is a diagram showing an example of calculation of application use frequency of an electronic device according to Modification 2 of Embodiment 1; FIG. 10 is a diagram showing reference tables of an electronic device according to Modification 3 of Embodiment 1, where (a) shows a first table, (b) shows a second table, and (c) shows a third table. FIG. 10 is a diagram showing a reference table of the electronic device according to the second embodiment; FIG. (a) shows the first table, and (b) shows the fourth table. FIG. 10 is a diagram showing a reference table of an electronic device according to a modification of the second embodiment; FIG. (a) shows the first table, (b) shows the second table, and (c) shows the fourth table. 14A is a diagram showing an example of allocation of reference tables in each time zone of the electronic device according to the third embodiment; FIG. (b) and (c) are diagrams showing reference tables of the electronic device, (b) showing the first table and (c) showing the second table. (a) is a diagram showing an example of allocation of reference tables for each remaining battery level of the electronic device according to the fourth embodiment. (b) to (d) are diagrams showing reference tables of the electronic device, where (b) shows the first table, (c) shows the second table, and (d) shows the fourth table.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail. For convenience of explanation, members having the same functions as members shown in each embodiment are denoted by the same reference numerals, and descriptions thereof are omitted as appropriate.

[Embodiment 1]
(Configuration of electronic device 1)
FIG. 1 is a block diagram showing the configuration of an electronic device 1 according to Embodiment 1. As shown in FIG. The electronic device 1 includes a clock section 2, a battery section 3, a control section 10, and a memory 50, as shown in FIG. The electronic device 1 may be, for example, a mobile information terminal such as a smart phone or a tablet terminal. The memory 50 may be singular or plural. A control device that includes the control unit 10 and controls the electronic device 1 also falls within the scope of the present invention. This controller may be singular or plural. The clock unit 2 keeps track of the current time. Note that the battery unit 3 will be described in a fourth embodiment.

The control unit 10 comprehensively controls each unit of the electronic device 1 . The functions of the control unit 10 may be implemented by a CPU (Central Processing Unit) executing a program stored in the memory 50 . Details of the control unit 10 will be described later.

(Configuration of memory 50)
The memory 50 stores various programs executed by the control unit 10 and various data used by the programs. The memory 50 stores an application storage section 51 , a usage state database 52 and a table storage section 53 . Each application executed by the electronic device 1 is stored in the application storage unit 51 . The memory 50 operates at an operating frequency determined by a memory operating frequency determining unit 14, which will be described later.

(Use state database 52)
FIG. 2 is a diagram showing an example of the usage state database 52 of the electronic device 1. As shown in FIG. The data structure of the usage state database 52 includes, for example, (1) application identification information, (2) application start time, (3) application stop time, (4) daily usage time, and (5) last week. time of use, consisting of:

(Table storage unit 53)
The table storage unit 53 stores reference tables. The reference table is a table referenced to determine the operating frequency of memory 50 . In this embodiment, a first table 531 and a second table 532 are stored in the table storage unit 53 as reference tables. FIG. 3 is a diagram showing a reference table of the electronic device 1. As shown in FIG. 3A shows the first table 531, and FIG. 3B shows the second table 532. FIG. The reference table is switched according to the use state of the electronic device 1 by the table switching unit 13, which will be described later.

As shown in FIG. 3, the first table 531 and the second table 532 are configured by associating the operating frequencies of the CPU with the operating frequencies of the memory 50 . The first table 531 associates the operating frequency of the CUP with the operating frequency of the memory 50 in a first correspondence relationship. The second table 532 associates the operating frequency of the CPU with the operating frequency of the memory 50 in a second correspondence relationship.

Further, in the second correspondence, the operating frequency of the memory 50 corresponding to at least one predetermined CPU operating frequency is higher than the operating frequency of the memory 50 corresponding to the predetermined CPU operating frequency in the first correspondence. is also expensive.

Specifically, the first table 531 and the second table share the item of CPU operating frequency, and the memory operating frequency for the CPU operating frequency of 2265 MHz is the same as 931 MHz. Regarding the CPU operating frequency of 300 MHz, the memory operating frequency of the first table 531 associated with the first correspondence is 75 MHz, while the memory operating frequency of the second table 532 associated with the second correspondence is 75 MHz. is 460 MHz. Similarly, for a CPU operating frequency of 1036 MHz, the memory operating frequency of the first table 531 is 460 MHz, while the memory operating frequency of the second table 532 is 931 MHz. In this way, the memory operating frequencies associated with the second correspondence are higher than the memory operating frequencies associated with the first correspondence. That is, the memory operating frequency of the second table 532 is higher than the memory operating frequency of the first table 531 at the common CPU operating frequency.

The first table 531 is, for example, a reference table normally used to reduce power consumption, and is set so that the operating frequency of the memory 50 decreases as the operating frequency of the CPU decreases, in accordance with the operating frequency of the CPU. It is a thing. In contrast, the second table 532 makes it difficult for the operating frequency of the memory 50 to drop even when the operating frequency of the CPU is low. Furthermore, when the CPU operating frequency is 300 MHz, the memory operating frequency is 460 MHz, which is higher than the CPU operating frequency. As a result, by operating the application using the second table 532, the application can be operated at a high operating frequency even when the operating frequency of the CPU is low. Further, the reference tables stored in the table storage unit 53 are not limited to the first table 531 and the second table 532, and may store more tables and switch between them.

(Configuration of control unit 10)
The control unit 10 performs a usage status acquisition process for acquiring the usage status of the electronic device 1 and a reference table that is referred to for determining the operating frequency of the memory 50 according to the usage status acquired by the usage status acquisition process. , table switching processing for switching from the first table 531 to the second table 532, and memory operating frequency determination processing for determining the operating frequency of the memory 50 using the reference table switched by the table switching processing.

The control unit 10 includes a usage state acquisition unit 11 , a usage frequency calculation unit 12 , a table switching unit 13 , and a memory operating frequency determination unit 14 .

The usage state acquisition unit 11 acquires the usage state of the electronic device 1 and constructs the usage state database 52 . The usage status acquisition unit 11 detects activation or termination of an application, acquires identification information and operation information of the application, and inputs them to the usage status database 52 . Specifically, the usage state acquisition unit 11 acquires (1) application identification information, (2) application start time, (3) application stop time, (3) daily usage time, and (4) most recent The usage time for one week is acquired and calculated, and the usage state database 52 is constructed.

Construction of the usage state database 52 will be described. First, when a predetermined application is activated for the first time on an arbitrary day, the usage state acquiring unit 11 detects the activation of the application and acquires identification information (for example, ID or name) and activation time of the application. do. If the acquired identification information exists in the usage state database 52, the usage state acquisition unit 11 inputs the activation time into the corresponding location of the usage state database 52 based on the acquired identification information. If the acquired identification information does not exist in the usage state database 52, the usage state acquisition unit 11 creates a table for the application in the usage state database 52 and inputs the activation time.

When the application is stopped for the first time, the usage status acquisition unit 11 detects the stop of the application and acquires the stop time. The usage status acquisition unit 11 inputs the stop time into the corresponding location of the usage status database 52 . Further, when the first activation is stopped, the usage state acquiring unit 11 obtains the usage time related to the first activation from the difference between the stop time and the activation time, and stores the usage time in the corresponding location in the usage state database 52 Enter the usage time.

If the same application is started again on the same day (second start), the start time and stop time entered for the first start overwrite the start time and stop time for the second time. be done. Similarly, the starting time and stopping time are overwritten with the previous starting time and stopping time from the third time onward. Therefore, finally, the last start time and stop time of the given day are stored as the start time and stop time of the use state database 52 . Further, the usage time calculated by the second activation of the application is added to the usage time calculated by the first activation. The usage time calculated for the third and subsequent activations is similarly added to the previous usage time. Thus, in each application, the usage state database 52 accumulates data on the start time, the stop time, and the usage time for each day. In addition, the usage state acquisition unit 11 aggregates the usage time for the most recent one week and stores it in the usage state database 52 as indicated by “all” in FIG. 2 .

The usage frequency calculator 12 calculates the usage frequency of the activated application from the total usage time of the activated application in the usage state database 52 and the total usage time of the other applications. The usage frequency is obtained, for example, from the ratio of the total usage time of the activated application in the last week to the total usage time of all applications in the last week. Specifically, in FIG. 2, the total usage time of the launched application in the most recent week is 27 hours. Assuming that the total usage time of all the applications in the usage state database 52 in the most recent week is 50 hours, the usage frequency of the applications in FIG. 2 is 27×100/50=54%.

The table switching unit 13 switches the reference table referred to for determining the operating frequency of the memory 50 from the first table 531 to the second table 532 according to the usage state acquired by the usage state acquisition unit 11 . In this embodiment, the table switching unit 13 switches the reference table from the first table 531 to the second table 532 when the frequency of use is higher than the first threshold. The first threshold is a predetermined threshold for determining the usage frequency, and can be arbitrarily set.

Specifically, for example, assume that the first threshold is set to 25% in advance. The table switching unit 13 determines whether or not the usage frequency calculated by the usage frequency calculation unit 12 exceeds 25%. When the usage frequency exceeds 25% of the first threshold, the table switching unit 13 switches the reference table from the first table 531 to the second table 532 . If the frequency of use does not exceed 25% of the first threshold, the table switching unit 13 sets the reference table to the first table 531 .

The memory operating frequency determining unit 14 uses the reference table switched by the table switching unit 13 to determine the operating frequency of the memory 50 . Specifically, the memory operating frequency determination unit 14 refers to the reference table and causes the memory 50 to operate at the memory operating frequency corresponding to the CPU operating frequency closest to the current CPU operating frequency.

As described above, the second table 532 makes it difficult for the operating frequency of the memory 50 to decrease even when the operating frequency of the CPU is low. Therefore, when the operating frequency of the memory 50 is operated based on the second table 532, the application can be operated with low delay even if the operating frequency of the CPU is lowered.

Further, in order to protect the CPU and the electronic device 1, the maximum operating frequency of the CPU may be clipped when the temperature of the CPU or the electronic device 1 exceeds a certain level. In this embodiment, when clipping the maximum value of the operating frequency of the CPU so that the operating frequency of the CPU does not reach 2265 MHz, the second table 532 is used so that the operating frequency is always higher than normal (when using the first table). The application will be operated at the set memory operating frequency. Therefore, the invention according to this embodiment works more effectively during operation in which the maximum value is clipped than in normal operation in which the maximum value is not clipped.

(Memory operating frequency determination processing)
An example of the memory operating frequency determination process will be described with reference to FIG. FIG. 4 is a flowchart showing an example of the flow of memory operating frequency determination processing executed by the electronic device 1 . As shown in FIG. 4, when an arbitrary application is activated, the usage status acquisition unit 11 detects the activation of the application (S1) and acquires the usage status of the activated application (S2, usage status acquisition processing, usage status acquisition step). Further, the use frequency calculation unit 12 calculates the use frequency of the activated application (S3, use state acquisition process, use state acquisition step).

The table switching unit 13 determines whether or not the usage frequency exceeds the first threshold (S4). If the frequency of use exceeds the first threshold (YES in S4), the table switching unit 13 switches the reference table from the first table 531 to the second table 532 (S5, table switching process, table switching step). If the usage frequency does not exceed the first threshold (NO in S4), the table switching unit 13 sets the reference table to the first table 531 (S6). Thereafter, the memory operating frequency determining unit 14 determines the operating frequency of the memory 50 based on the set reference table (S7, memory operating frequency determining process, memory operating frequency determining step).

In the electronic device 1, if all applications are similarly controlled to determine the operating frequency of the memory 50 according to only the fluctuating operating frequency of the CPU, the user's usability of the electronic device 1 may deteriorate. This is because even if an application that is frequently used by the user is activated by the above control, the operating frequency of the memory 50 will also be low if the operating frequency of the CPU is low, resulting in a large delay with respect to the user's operation. .

In the present embodiment, in order to deal with the above problem, the memory 50 is operated at a high operating frequency even when the operating frequency of the CPU is low when a frequently used application is activated. As a result, it is possible to perform low-delay processing with respect to user input, so that it is possible to perform control suitable for each user's usage without impairing convenience.

Moreover, even if the operating frequency of the CPU is kept low by thermal control or the like, the operating frequency of the memory 50 can be kept high for frequently used applications, so low-delay processing is possible. .

(Modification 1)
In the present invention, the use frequency criteria and determination method are not limited to those in the first embodiment. In this modified example, another example of the use frequency criteria and determination method will be described with reference to FIG. FIG. 5 is a diagram showing a calculation example of the application use frequency of the electronic device 1 according to Modification 1 of Embodiment 1. As shown in FIG.

In this modified example, the usage state acquisition unit 11 records the number of times the application is started per day, and calculates the average number of times the application is started per day in the most recent week. The table switching unit 13 determines that the application with the highest average number of activations is the application with the highest usage frequency. The table switching unit 13 switches the reference table from the first table 531 to the second table 352 when determining that the frequency of use of the activated application is high. However, the portion of None which is before the installation date of the application is not included in the parameter.

For example, in FIG. 5, application C has the largest total number of starts, and application B has the largest average number of starts. In this case, application B is determined to be the application with the highest usage frequency. The table switching unit 13 switches the reference table from the first table 531 to the second table 352 when the application B, which is used most frequently, is activated.

It should be noted that the determination of whether or not the frequency of use of the started application is high is made by comparing the average number of times of activation with a second threshold predetermined for determining the frequency of use based on the average number of times of activation. You may Specifically, when the average number of activations is higher than the second threshold, the table switching unit 13 determines that the activated application has a high frequency of use, and switches the reference table from the first table 531 to the second table 532. There may be.

(Modification 2)
In this modified example, still another example of the use frequency criteria and determination method will be described with reference to FIG. FIG. 6 is a diagram showing a calculation example of the application use frequency of the electronic device 1 according to Modification 2 of Embodiment 1. As shown in FIG.

In this modified example, as an extension of modified example 1, the number of times an application is started per day in the most recent week is weighted using a coefficient. More specifically, the number of times of activation is weighted so that the day closer to the present day in the most recent one week is weighted. For example, as shown in FIG. 6, the coefficients are set to 7, 6, 5, 4, 3, 2, and 1 in order from the current date, and the number of activations is multiplied by the coefficient to calculate the total adjusted number of activations. Also, the average number of adjusted activations is calculated by averaging the total number of adjusted activations over the most recent one week. In this modified example, the usage frequency of the application is determined using the average adjusted activation count. Specifically, the table switching unit 13 determines the application with the highest average adjustment start count as the application with the highest usage frequency.

In the case shown in FIG. 6, application A has the highest average number of times of adjustment activation, and application A is determined to be an application with a high frequency of use. The table switching unit 13 switches the reference table from the first table 531 to the second table 352 when the application A, which is used most frequently, is activated.

(Modification 3)
In this modified example, still another example of the use frequency criteria and determination method will be described with reference to FIGS. 5 and 7. FIG. 7A and 7B are diagrams showing reference tables of the electronic device 1 according to Modification 3 of Embodiment 1. FIG. 7A shows the first table 531, FIG. (c) shows the third table 533 .

In this modification, reference tables, a first table 531, a second table 532, and a third table, which correspond to the operating frequencies of the CPU and the operating frequencies of the memory shown in FIGS. 533 is prepared. The third table 533 associates the operating frequency of the CPU with the operating frequency of the memory 50 in a third correspondence relationship. In the third correspondence, the operating frequency of the memory 50 corresponding to at least one predetermined CPU operating frequency is higher than the operating frequency of the memory 50 corresponding to the predetermined CPU operating frequency in the second correspondence. In other words, the memory operating frequency of the third table 533 is higher than or equal to the memory operating frequency of the second table 532 at the common CPU operating frequency.

In addition, in this modified example, the condition for switching the reference table is defined as (1) the highest average number of activations, or (2) the average number of activations of 3 or more. The table switching unit 13 determines whether the activated application satisfies (1) and (2). When the activated application satisfies both (1) and (2), the table switching unit 13 switches the reference table from the first table 531 to the third table 533 . If the activated application satisfies either (1) or (2), the table switching unit 13 switches the reference table from the first table 531 to the second table 532 . If the activated application does not satisfy both (1) and (2), the table switching unit 13 sets the reference table to the first table 531 .

In the usage state shown in FIG. 5, application B satisfies both (1) and (2), so it is operated by the third table 533 with the lowest delay. Since application A satisfies only (2), it is operated on the second table 532 . Since application C does not satisfy both (1) and (2), it is run on first table 531 .

As a result, for example, even if thermal control is applied and the operating frequency of the CPU is limited to 300 or less, the application B can operate at a high frequency with respect to the memory 50 .

[Embodiment 2]
An electronic device 1A according to Embodiment 2 of the present invention will be described with reference to FIGS. 1 and 8. FIG. The electronic device 1A differs from the electronic device 1 in that a table switching section 13A is provided in place of the table switching section 13, and other configurations are the same. The electronic device 1A operates at a low memory frequency even when the operating frequency of the CPU is high in an application that is used infrequently. Thereby, power consumption can be further suppressed.

In this embodiment, the table storage unit 53 stores a first table 531 and a fourth table 534 as reference tables. FIG. 8 is a diagram showing a reference table of the electronic device 1A. 8A shows the first table 531, and FIG. 8B shows the fourth table 534. FIG. The fourth table 534 associates the operating frequency of the CPU with the operating frequency of the memory 50 in a fourth correspondence relationship. In the fourth correspondence, the operating frequency of the memory 50 corresponding to at least one predetermined CPU operating frequency is lower than the operating frequency of the memory 50 corresponding to the predetermined CPU operating frequency in the first correspondence. In other words, the memory operating frequency of the fourth table 534 is lower than or equal to the memory operating frequency of the first table 531 at the common CPU operating frequency.

Regarding the CPU operating frequency of 1036 MHz, the memory operating frequency of the first table 531 associated with the first correspondence is 460 MHz, while the memory operating frequency of the fourth table 534 associated with the fourth correspondence is 460 MHz. is 75 MHz. Similarly, when considering the CPU operating frequency of 2265 MHz, the memory operating frequency of the first table 531 is 931 MHz, while the memory operating frequency of the fourth table 534 is 460 MHz. In this way, the memory operating frequency associated with the fourth correspondence is lower than the memory operating frequency associated with the first correspondence.

The fourth table 534 makes it difficult for the operating frequency of the memory 50 to increase even when the operating frequency of the CPU is high. As a result, by operating the application using the fourth table 534, the application can be operated at a low operating frequency even when the operating frequency of the CPU is high. As a result, power consumption can be suppressed.

In this embodiment, the average number of times applications are started per day in the most recent week is calculated. 4 Switch to table 534 . In other words, the table switching unit 13A switches the reference table from the first table 531 to the fourth table 534 when the usage frequency is lower than the third threshold. The third threshold is a predetermined threshold for determining the frequency of use based on the average number of activations. The third threshold is set, for example, so that the table switching unit 13A switches the reference table when an application with the smallest average number of times of activation in the usage state database 52 is activated.

As a result, for example, even if application A and application C operate at the same CPU frequency of 1036 MHz, application A operates at 460 MHz and application C operates at 75 MHz. Therefore, less frequently used applications can operate with lower power consumption.

(Modification)
In this modified example, another example of the use frequency criteria and determination method of the second embodiment will be described with reference to FIGS. 5 and 9. FIG. FIG. 9 is a diagram showing a reference table of the electronic device 1A according to the modification of the second embodiment. 9A shows the first table 531, FIG. 9B shows the second table 532, and FIG. 9C shows the fourth table 534. FIG.

In this modified example, reference tables, a first table 531, a second table 532, and a fourth table, shown in FIGS. A table 534 is prepared.

Also, in this modification, the conditions for switching the reference table are (1) the one with the highest average number of activations, (2) the one with the lowest average number of activations, and (3) other than that. The table switching unit 13A determines whether the activated application satisfies (1) or (2). When the activated application satisfies (1), the table switching unit 13A switches the reference table from the first table 531 to the second table 532 . When the activated application satisfies (2), the table switching unit 13A switches the reference table from the first table 531 to the fourth table 534 . If the activated application does not satisfy both (1) and (2), the table switching unit 13A sets the first table 531 as the reference table.

Specifically, when the usage state database 52 is as shown in FIG. 5, the application B satisfies (1), so it is operated by the second table 532 with the lowest delay. Since application C satisfies (2), it is operated on the fourth table 534 . Since application A does not satisfy both (1) and (2), it is run on first table 531 . As a result, it is possible to perform control suitable for each user's usage without impairing convenience.

[Embodiment 3]
An electronic device 1B according to Embodiment 3 of the present invention will be described with reference to FIGS. 1 and 10. FIG. (a) of FIG. 10 is a diagram showing an example of allocation of reference tables in each time zone of the electronic device 1B according to the third embodiment. 10(b) and 10(c) are diagrams showing the reference tables of the electronic device 1B. FIG. 10(b) shows the first table 531, and FIG. 10(c) shows the second table 532. show. The electronic device 1B is different from the electronic device 1 in that a usage state acquisition unit 11B and a table switching unit 13B are provided instead of the usage state acquisition unit 11 and the table switching unit 13. It is the same. The electronic device 1B switches the reference table depending on the time zone.

In this embodiment, the table storage unit 53 stores a first table 531 and a second table 532 as reference tables. The usage state acquisition unit 11B acquires the current time from the clock unit 2. FIG. The table switching unit 13B switches the reference table from the first table 531 to the second table 532 according to the time acquired from the clock unit 2 . Specifically, as shown in (a) of FIG. 10, the table switching unit 13B switches the reference table to the first table 531 if the time acquired from the clock unit 2 is from 6:00 to 8:59. to the second table 532. The table switching unit 13B sets the reference table to the first table 531 if the time acquired from the clock unit 2 is other than 6:00 to 8:59. As a result, for example, the application can be operated with a low delay time in the morning hours when many people are likely to be busy, and usability can be improved.

[Embodiment 4]
An electronic device 1C according to Embodiment 4 of the present invention will be described with reference to FIGS. 1 and 11. FIG. FIG. 11(a) is a diagram showing an example of allocation of reference tables for each remaining battery level of the electronic device 1C according to the fourth embodiment. FIGS. 11(b) to 11(d) are diagrams showing reference tables of the electronic device 1C. FIG. 11(b) is the first table 531, FIG. 11(c) is the second table 532, (d) of FIG. 11 shows the fourth table 534 .

The electronic device 1C differs from the electronic device 1 in that a usage state acquisition unit 11C and a table switching unit 13C are provided instead of the usage state acquisition unit 11 and the table switching unit 13. It is the same. The electronic device 1C switches the reference table according to the remaining battery level.

In this embodiment, the table storage unit 53 stores a first table 531, a second table 532, and a fourth table 534 as reference tables. The battery unit 3 is charged with electric power and supplies electric power to each unit constituting the electronic device 1C. The usage state acquisition unit 11</b>C acquires the remaining battery level (remaining charge) from the battery unit 3 . The table switching unit 13</b>C switches the reference table according to the remaining battery level obtained from the battery unit 3 .

Specifically, as shown in (a) of FIG. 11, when the remaining battery level obtained from the battery unit 3 is between 0% and less than 33%, the table switching unit 13C switches the reference table from the first table 531 to the second table. 4 Switch to table 534 . When the remaining battery level obtained from the battery unit 3 is between 33% and less than 66%, the table switching unit 13C sets the reference table to the first table 531 . When the remaining battery level obtained from the battery unit 3 is 66% to 100%, the table switching unit 13C switches the reference table from the first table 531 to the second table 532. FIG.

As a result, when it is determined that the remaining battery level is sufficient (when the remaining battery level is between 66% and 100%), the application can be operated with a short delay time. Also, when it is determined that the remaining battery level is insufficient (when the remaining battery level is between 0% and less than 33%), the decrease in the remaining battery level can be suppressed instead of increasing the delay time. As a result, users who charge before the remaining battery level becomes insufficient will only feel the benefits of low latency, while users who run out of battery will be able to enjoy applications without significantly changing the total usage time. can be operated.

[Example of realization by software]
The control blocks of the electronic devices 1, 1A, 1B, and 1C (especially the usage state acquisition units 11, 11B, and 11C, the usage frequency calculation unit 12, the table switching units 13, 13A, 13B, and 13C, and the memory operating frequency determination unit 14) are It may be implemented by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be implemented by software.

In the latter case, the electronic devices 1, 1A, 1B, and 1C are provided with computers that execute instructions of programs, which are software for realizing each function. This computer includes, for example, at least one processor (control device) and at least one computer-readable recording medium storing the program. In the computer, the processor reads the program from the recording medium and executes it, thereby achieving the object of the present invention. As the processor, for example, a CPU (Central Processing Unit) can be used. As the recording medium, a "non-temporary tangible medium" such as a ROM (Read Only Memory), a tape, a disk, a card, a semiconductor memory, a programmable logic circuit, or the like can be used. In addition, a RAM (Random Access Memory) for developing the above program may be further provided. Also, the program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. Note that one aspect of the present invention can also be implemented in the form of a data signal embedded in a carrier wave in which the program is embodied by electronic transmission.

〔summary〕
An electronic device (1, 1A, 1B, 1C) according to aspect 1 of the present invention includes a control unit (10) that processes various data, a memory (50) that stores various data processed by the control unit, and the control A first table (531) in which the operating frequency of the unit and the operating frequency of the memory are associated in a first correspondence relationship, and the operating frequency of the control unit and the operating frequency of the memory in a second correspondence relationship. and a table storage unit (53) storing at least second tables (second table 532, third table 533, and fourth table 534) associated with each other, wherein the control unit comprises: a use state acquisition process for acquiring the use state of the electronic device; A table switching process for switching from a table to the second table, and a memory operating frequency determining process for determining the operating frequency of the memory using the reference table switched by the table switching process are executed.

According to the above configuration, the reference table for determining the operating frequency of the memory is switched from the first table to the second table according to the obtained usage state of the electronic device, and the memory operating frequency is switched. Determined using a lookup table. The second table is a table in which the operating frequency of the control unit and the operating frequency of the memory are associated with each other in a second correspondence different from the first correspondence of the first table.

As a result, for example, even when the operating frequency of the control unit is low in the second table, the following effects can be obtained by setting the operating frequency of the memory high. In other words, even if the operating frequency of the control unit is lowered in order to suppress power consumption, the memory can be operated at a high operating frequency according to the state of use of the electronic device. As a result, the application can be operated with low delay even when the operating frequency of the control unit is low, so that it is possible to implement an electronic device that does not impair user convenience while suppressing power consumption.

In the electronic device (1/1A) according to aspect 2 of the present invention, in the above aspect 1, the usage state acquisition processing may include processing for acquiring usage frequency of an application being executed in the electronic device. .

According to the above configuration, it is possible to switch the reference table according to the frequency of use of the application being executed and determine the operating frequency of the memory.

In the electronic device (1) according to aspect 3 of the present invention, in aspect 2 above, the second correspondence relationship is the operating frequency of the memory (50) corresponding to the operating frequency of at least one predetermined control unit (10) is higher than the operating frequency of the memory corresponding to the operating frequency of the predetermined control unit in the first correspondence, and the table switching process is performed so that the frequency of use is set to predetermined thresholds (first threshold, second threshold), the process of switching the reference table from the first table (531) to the second table (second table 532, third table 533) may be included.

According to the above configuration, an application whose usage frequency is determined to be higher than a predetermined threshold can be operated at a high operating frequency of the memory. As a result, frequently used applications can be operated at a high memory operating frequency even when the operating frequency of the control unit is low, so applications can be operated with low delay even when the operating frequency of the control unit is low. be able to.

In the electronic device (1A) according to aspect 4 of the present invention, in aspect 2 above, the second correspondence relationship is the operating frequency of the memory (50) corresponding to the operating frequency of at least one predetermined control unit (10) is lower than the operating frequency of the memory corresponding to the operating frequency of the predetermined control unit in the first correspondence, and the table switching process is performed when the frequency of use is lower than a predetermined threshold (third threshold) If it is low, a process of switching the reference table from the first table (531) to the second table (fourth table 534) may be included.

According to the above configuration, an application whose usage frequency is determined to be lower than a predetermined threshold can be operated at a low operating frequency of the memory. As a result, an application that is used infrequently can be operated at a low operating frequency of the memory even when the operating frequency of the control unit is high, thereby further reducing power consumption.

In the electronic device (1B) according to aspect 5 of the present invention, in aspect 1 above, the usage state acquisition process includes a process of acquiring a current time, and the table switching process uses the acquired time to obtain the A process of switching the reference table from the first table (531) to the second table (532) may be included.

According to the above configuration, the operating frequency of the memory can be determined according to the time zone. As a result, for example, even when the operating frequency of the control unit is low in the second table, the operating frequency of the memory can be set high, and the memory can be operated with the second table during times when many people are likely to be busy. can run applications with low latency. As a result, usability can be improved.

An electronic device (1C) according to aspect 6 of the present invention is the aspect 1, wherein the usage state obtaining process includes a process of obtaining a current remaining battery level of the electronic apparatus, and the table switching process includes the obtaining A process of switching the reference table from the first table (531) to the second table (second table 532, fourth table 534) may be included according to the remaining battery level.

According to the above configuration, the operating frequency of the memory can be determined according to the remaining battery level. As a result, for example, the second table is set so that the memory frequency is low even when the operating frequency of the control unit is high, and the second table is operated when the remaining battery level is insufficient, thereby reducing battery life. When the remaining amount is insufficient, the reduction of the remaining battery amount can be suppressed. As a result, the total usage time can be kept relatively unchanged for users who run out of batteries.

A control device according to aspect 7 of the present invention comprises a control unit (10) that processes various data, a memory (50) that stores various data processed by the control unit, an operating frequency of the control unit, and an operation of the memory. A first table (531) in which frequencies are associated in a first correspondence relationship, and a second table (531) in which the operating frequencies of the control section and the operating frequencies of the memory are associated in a second correspondence relationship. a table storage unit (53) storing at least a second table 532, a third table 533, and a fourth table 534); a use state acquiring unit (11) for acquiring a use state of a device; a table switching unit (13) for switching from the first table to the second table; a memory operating frequency determining unit (14) for determining the operating frequency of the memory using the reference table switched by the table switching unit; It has According to the above configuration, the same effects as those of the first aspect are obtained.

A control method for an electronic device according to aspect 8 of the present invention comprises a control unit (10) for processing various data, a memory (50) for storing various data processed by the control unit, an operating frequency of the control unit, and the A first table (531) in which the operating frequencies of the memory are associated in a first correspondence relationship, and a second table in which the operating frequencies of the control section and the operating frequencies of the memory are associated in a second correspondence relationship. A control method for controlling an electronic device comprising: a table storage unit (53) storing at least tables (second table 532, third table 533, and fourth table 534); a use state obtaining step of obtaining a use state; and a reference table referred to for determining the operating frequency of the memory according to the use state obtained in the use state obtaining step, from the first table to the second table. a table switching step of switching to two tables; and a memory operating frequency determining step of determining the operating frequency of the memory using the reference table switched in the table switching step. According to the above configuration, the same effects as those of the first aspect are obtained.

The electronic devices 1, 1A, 1B, and 1C according to each aspect of the present invention may be implemented by a computer. A control program for the electronic devices 1, 1A, 1B, and 1C for realizing the electronic devices 1, 1A, 1B, and 1C by operating as fall into the category.

The present invention is not limited to the above-described embodiments, but can be modified in various ways within the scope of the claims, and can be obtained by appropriately combining technical means disclosed in different embodiments. is also included in the technical scope of the present invention. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment.

1, 1A, 1B, 1C electronic device, 10 control unit, 11, 11B, 11C use state acquisition unit, 12 use frequency calculation unit, 13, 13A, 13B, 13C table switching unit, 14 memory operating frequency determination unit, 50 memory , 53 table storage unit, 531 first table 532 second table, 533 third table (second table), 534 fourth table (second table)

Claims (9)

a control unit that processes various data;
a memory for storing various data processed by the control unit; a first table in which the operating frequency of the control unit and the operating frequency of the memory are associated in a first correspondence; and the operating frequency of the control unit and the operating frequency of the memory. a table storage unit storing at least a second table in which the operating frequency of the memory is associated in a second correspondence relationship;
An electronic device comprising
The control unit
a usage state acquisition process for acquiring the usage state of the electronic device;
a table switching process for switching a reference table referred to for determining an operating frequency of the memory from the first table to the second table according to the usage status acquired by the usage status acquisition process;
memory operating frequency determination processing for determining the operating frequency of the memory using the reference table switched by the table switching processing;
An electronic device characterized by executing 2. The electronic device according to claim 1, wherein the use state acquisition processing includes processing for acquiring a usage frequency of an application being executed in the electronic device. The second correspondence relationship is such that the operating frequency of the memory corresponding to the operating frequency of at least one predetermined control unit is higher than the operating frequency of the memory corresponding to the operating frequency of the predetermined control unit in the first correspondence relationship. is also high,
3. The electronic device according to claim 2, wherein the table switching process includes switching the reference table from the first table to the second table when the frequency of use is higher than a predetermined threshold. machine. The second correspondence relationship is such that the operating frequency of the memory corresponding to the operating frequency of at least one predetermined control unit is higher than the operating frequency of the memory corresponding to the operating frequency of the predetermined control unit in the first correspondence relationship. is also low,
3. The method according to claim 2, wherein the table switching process includes switching the reference table from the first table to the second table when the frequency of use is lower than a predetermined threshold. Electronics. The usage state acquisition process includes a process of acquiring the current time,
2. The electronic device according to claim 1, wherein the table switching process includes switching the reference table from the first table to the second table according to the acquired time. The usage state acquisition process includes a process of acquiring the current remaining battery level of the electronic device,
2. The electronic device according to claim 1, wherein the table switching process includes switching the reference table from the first table to the second table according to the acquired remaining battery level. A control program for causing a computer to function as a control unit in the electronic device according to claim 1. a control unit that processes various data;
a memory for storing various data processed by the control unit; a first table in which the operating frequency of the control unit and the operating frequency of the memory are associated in a first correspondence; and the operating frequency of the control unit and the operating frequency of the memory. a table storage unit storing at least a second table in which the operating frequency of the memory is associated in a second correspondence relationship;
A control device for controlling an electronic device comprising
The control device is
a usage status acquisition unit that acquires the usage status of the electronic device;
a table switching unit that switches a reference table referred to for determining an operating frequency of the memory from the first table to the second table according to the usage state acquired by the usage state acquisition unit;
a memory operating frequency determining unit that determines the operating frequency of the memory using the reference table switched by the table switching unit;
A control device comprising: a control unit that processes various data;
a memory for storing various data processed by the control unit; a first table in which the operating frequency of the control unit and the operating frequency of the memory are associated in a first correspondence; and the operating frequency of the control unit and the operating frequency of the memory. a table storage unit storing at least a second table in which the operating frequency of the memory is associated in a second correspondence relationship;
A control method for controlling an electronic device comprising
a usage state acquisition step of acquiring the usage state of the electronic device;
a table switching step of switching a reference table referred to for determining an operating frequency of the memory from the first table to the second table according to the usage status acquired in the usage status acquisition step;
a memory operating frequency determining step of determining the operating frequency of the memory using the reference table switched in the table switching step;
A control method for an electronic device, comprising:

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