JP2015230613A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus capable of preventing shutdown due to sharp voltage drop on a battery under low temperature.SOLUTION: An electronic apparatus 100 includes: a battery 101 for supplying a voltage to own processor; a measurement section 102 that measures the temperature on the battery; a control section 103; and a setting section 104. The control section 103 controls the processing capacity of the processor at predetermined time interval. The setting section 104 sets the time interval for controlling the control section 103 based on the temperature measured by the measurement section 102. When the temperature is high, the setting section 104 sets the time interval to be longer, and when the temperature is low, the setting section 104 sets the time interval to be shorter.

Description

  The present invention relates to an electronic device.

  Conventionally, in order to suppress power consumption at startup, when the temperature of the battery measured at startup is equal to or lower than a predetermined value, power is supplied to each part except the auxiliary storage device and the backlight, and then the auxiliary storage device A technique for supplying power to the backlight after supplying power to and spinning up is known (for example, see Patent Document 1 below).

  Further, a technique is known in which a physical quantity of a power source is measured at predetermined time intervals after driving of the load is stopped, power recovery information is output, and a load driving instruction is issued based on the power recovery information (for example, Patent Document 2 below). reference.).

  In addition, a technique for determining the remaining usage time of the battery by detecting the remaining usage time of the battery when continuously talking and the remaining usage time of the battery when continuously receiving standby is known (for example, , See Patent Document 3 below).

JP 2000-228201 A International Publication No. 2008/013299 JP 2003-37945 A

  However, conventionally, for example, a secondary battery such as a lithium ion secondary battery used in an electronic device such as a portable terminal device tends to cause a rapid drop in battery voltage due to an increase in internal resistance at low temperatures. Therefore, at the time of low temperature, there is a problem that the electronic device shuts down by detecting the shortage of the remaining amount of the battery despite the remaining amount of the battery.

  In one aspect, an object of the present invention is to provide an electronic device that can suppress a shutdown due to a rapid drop in battery voltage at a low temperature.

  According to an aspect of the present invention, a battery that supplies a voltage to the processor of its own device, a measurement unit that measures the temperature of the battery, a control unit that controls the processing capability of the processor, and the measurement unit measures An electronic device is proposed that includes a setting unit that sets a time interval for the control unit to perform the control based on the temperature.

  According to one embodiment of the present invention, shutdown due to a rapid drop in battery voltage at low temperatures can be suppressed.

FIG. 1 is an explanatory view showing an operation example of an electronic apparatus according to the present invention. FIG. 2 is an explanatory diagram showing an example of a drop voltage at start-up due to temperature. FIG. 3 is a block diagram illustrating a hardware configuration example of the electronic device. FIG. 4 is an explanatory diagram illustrating an example of a voltage change amount. FIG. 5 is an explanatory diagram illustrating an example of a set time interval. FIG. 6 is an explanatory diagram illustrating an example of a control table group. FIG. 7 is a flowchart (part 1) illustrating an example of a processing procedure performed by the electronic device. FIG. 8 is a flowchart (part 2) illustrating an example of a processing procedure performed by the electronic device.

  Exemplary embodiments of an electronic device according to the present invention will be described below in detail with reference to the accompanying drawings.

  FIG. 1 is an explanatory view showing an operation example of an electronic apparatus according to the present invention. The electronic device 100 is a device having a rechargeable battery 101, for example, and is, for example, a mobile terminal device such as a mobile phone or a smartphone. The battery 101 is, for example, a lithium ion secondary battery.

  For example, in the case of a mobile terminal device, it may be operated in a low-temperature environment or a high-temperature environment as a user who owns the mobile terminal device moves. Conventionally, when a mobile terminal device is operated in a low-temperature environment, the voltage that can be output as a characteristic of the battery 101 mounted on the mobile terminal device decreases, and the internal resistance of the battery 101 increases. For this reason, in a low temperature environment, when the system of the mobile terminal device is activated or when an application such as a camera is operated, the battery voltage may drop below the detection voltage for software shutdown, and the mobile terminal device may be software shut down.

  Therefore, for example, by controlling the processing capability of the processor such as lowering the frequency of the clock supplied to the processor according to the load state of the processor, the battery voltage drop amount can be suppressed. In addition, for example, by controlling the processing capacity of the processor, such as limiting the clock supplied to the processor when the battery temperature is low, the amount of dropped battery voltage is reduced and the portable terminal device is prevented from shutting down. can do.

  However, in a low temperature environment, there are cases where the electronic device shuts down upon detection of a shortage of the remaining battery power despite the remaining battery power. Therefore, for example, by shortening the time interval for controlling the processing capability of the processor, it is possible to prevent the portable terminal device from shutting down. However, if the time interval is shortened, the number of processes for controlling the processing capability of the processor is increased, so that the battery 101 is rapidly reduced.

  Therefore, in this embodiment, the time interval for controlling the processing capacity of the processor is set according to the battery temperature. Thereby, the shutdown by the rapid fall of the battery voltage at the time of low temperature can be suppressed, suppressing the reduction of the battery voltage by the said control at the time of high temperature.

  First, for example, the electronic device 100 includes a battery 101, a measurement unit 102, a control unit 103, and a setting unit 104. The battery 101 is, for example, a battery 101 that supplies a voltage to a processor included in the electronic device 100. The battery 101 is, for example, a rechargeable battery 101. The measuring instrument measures the temperature of the battery 101 directly or indirectly, for example. Measuring the temperature directly means, for example, that a measuring instrument is provided in the vicinity of the battery 101 and the measuring instrument measures the temperature in the vicinity. Indirectly measuring the temperature means, for example, that the measuring instrument measures the temperature in the vicinity of the battery 101 with infrared rays or the like.

  The processes of the control unit 103 and the setting unit 104 may be realized by, for example, a processor included in the electronic device 100 or may be realized by a controller that can control the processor. The control unit 103 controls the processing capacity of the processor at predetermined time intervals. The predetermined time interval is, for example, a set time interval. The set time interval may be used repeatedly or may be used only once. For example, when a predetermined time interval is repeatedly used, the control unit 103 controls the processing capability of the processor at every predetermined time interval. For example, when a predetermined time interval is used only once, the control unit 103 performs control of the processing capacity of the processor after a predetermined time interval has elapsed since the previous control, and the setting unit 104 newly performs a predetermined time. Set the interval. Control of the processing capacity of the processor includes, for example, changing the frequency of a clock signal supplied to the processor. For example, when the processor has a plurality of cores, the processing capability of the processor is controlled by supplying a clock signal or a voltage to a determined core among the plurality of cores. For this reason, the control part 103 performs the control process of a battery voltage by controlling the processing capacity of a processor. Thereby, the reduction degree of the voltage of the battery 101 is controllable.

  The setting unit 104 sets a time interval at which the control unit 103 performs control based on the temperature measured by the measurement unit 102. For example, when the temperature measured by the measurement unit 102 is the first temperature, the setting unit 104 sets the time interval to the first interval i1. When the temperature measured by the measuring unit 102 is the second temperature higher than the first temperature, the setting unit 104 sets the time interval to the second interval i2 that is longer than the first interval i1. If the measured temperature is the second temperature, it may be determined that the temperature is high, for example, and if the measured temperature is the first temperature, it may be determined that the temperature is low, for example.

  Thereby, the shutdown by the rapid fall of the battery voltage at the time of low temperature can be suppressed, suppressing the reduction of the battery voltage by the said control at the time of high temperature.

  FIG. 2 is an explanatory diagram showing an example of a drop voltage at start-up due to temperature. In recent years, a CPU (Central Processing Unit) mounted on a mobile terminal device such as a mobile phone or a smartphone has the same performance as a CPU mounted on a PC due to an improvement in processing capability. Therefore, the mobile terminal device can execute high-load application software.

  On the other hand, when the mobile terminal device is operated in a low temperature environment, the voltage that can be output as the characteristics of the battery mounted on the mobile terminal device decreases, and the internal resistance of the battery increases. For this reason, in a low temperature environment, the battery voltage may drop below the detection voltage for software shutdown when the mobile terminal device is activated or when an application such as a camera is operated, and the mobile terminal device may be shut down.

  Therefore, for example, by reducing the frequency of the clock supplied to the CPU in accordance with the load status of the CPU, it is possible to suppress the drop amount of the battery voltage. In addition, for example, by limiting the clock supplied to the CPU when the battery temperature is low, it is possible to reduce the amount of battery voltage drop and prevent the mobile terminal device from shutting down.

  However, as shown in FIG. 2, even if the remaining amount of the battery remains in a low temperature environment, a sudden voltage drop occurs in the battery voltage due to the activation of the high-load application software. As a result, the portable terminal device may be software shut down before limiting the clock supplied to the CPU. In addition, it is possible to suppress the software shutdown of the mobile terminal device by shortening the cycle for monitoring the battery voltage in order to limit the clock supplied to the CPU, but the battery is rapidly reduced.

  Therefore, in the present embodiment, by changing the cycle for acquiring the battery voltage according to the battery temperature, it is possible to slow down the battery while suppressing the mobile terminal device from shutting down.

(Example of hardware configuration of electronic device 100)
FIG. 3 is a block diagram illustrating a hardware configuration example of the electronic device. The electronic device 100 includes a CPU 301, a ROM (Read Only Memory) 302, a RAM (Random Access Memory) 303, a power controller 304, a clock controller 305, a camera 306, an LCD (Liquid Crystal Display) 307, a wireless I / F (InterFace) 308, thermistor 309, and battery 310 are included. Each unit is connected via a bus 311.

  The CPU 301 is a processor that controls the entire electronic device 100. The CPU 301 has a plurality of cores. The ROM 302 stores a program such as a boot program. The RAM 303 is used as a work area for the CPU 301.

  The wireless I / F 308 is connected to a network NET such as a LAN (Local Area Network), a WAN (Wide Area Network), and the Internet through a communication line, and is connected to other devices via the network NET.

  The clock controller 305 supplies a clock signal to each unit. Further, the CPU 301 can change the frequency of the clock signal supplied to each unit by controlling the clock controller 305. Further, the CPU 301 can control the number of operating cores included in the CPU 301 by controlling the clock controller 305.

  The power controller 304 supplies power to each unit. Further, the CPU 301 can control the number of operating cores included in the CPU 301 by controlling the power supply controller 304. The thermistor 309 is a sensor that can measure the temperature of the substrate. The battery 310 includes a thermistor 322 and a battery 321. The thermistor 322 is a sensor that can measure the temperature of the battery 321 and is the measurement unit 102. In the present embodiment, the temperature measured by the thermistor 322 is referred to as the battery temperature. The battery 321 stores electric power obtained by charging or self-power generation. In the present embodiment, the voltage of the battery 321 is referred to as a battery voltage. The electronic device 100 also has an input device such as a camera 306 and an output device such as an LCD 307.

  Although not shown, for example, an input device such as a nonvolatile memory or a touch panel may be provided.

(Functional configuration example of electronic device 100)
As illustrated in FIG. 1, the electronic device 100 includes a battery 101, a measurement unit 102, a control unit 103, and a setting unit 104. The processing of the control unit 103 and the setting unit 104 is coded in a program stored in a storage device such as a RAM 303 and a ROM 302 that can be accessed by the CPU 301 shown in FIG. Then, the CPU 301 reads the program from the storage device and executes the process coded in the program. Thereby, the processing of the control unit 103 is realized. The processing results of the control unit 103 and the setting unit 104 are stored in a storage device such as the RAM 303 and the ROM 302, for example.

  The control unit 103 controls the processing capability of the CPU 301 at predetermined time intervals. As described above, the predetermined time interval is, for example, a set time interval. The set time interval may be used repeatedly or may be used only once. For example, when a predetermined time interval is repeatedly used, the control unit 103 controls the processing capability of the processor at every predetermined time interval. For example, when a predetermined time interval is used only once, the control unit 103 controls the processing capacity of the processor after a predetermined time interval has elapsed since the previous control, and a setting unit 104 (to be described later) newly sets the predetermined time interval. The time interval may be set. Control of the processing capability of the CPU 301 includes, for example, changing the frequency of a clock signal supplied to the CPU 301. Further, for example, the processing capability of the CPU 301 is controlled by supplying a clock signal or a voltage to a determined core among a plurality of cores. For this reason, the control part 103 performs the control process of a battery voltage by controlling the processing capability of CPU301. Thereby, the decrease degree of a battery voltage is controllable.

  Further, the control unit 103 derives the amount of change in the battery voltage per time based on the amount of decrease from the battery voltage when the charging of the battery 101 is completed and the elapsed time since the charging of the battery 101 is completed. To do.

  FIG. 4 is an explanatory diagram illustrating an example of a voltage change amount. For example, assume that the voltage value of the battery 310 when the charging of the battery 310 is completed is V0, and the elapsed time from the completion of the charging of the battery 310 is Δt. For example, the control unit 103 can calculate the amount of change ΔV per hour in the battery voltage when the voltage at a certain time t1 is Vt1, using the following equation (1).

  ΔV = (V0−Vt1) / Δt (1)

  (V0−Vt1) is the amount of decrease from the battery voltage when the charging of the battery 101 is completed. For example, the control unit 103 controls the processing capability of the CPU 301 based on the change amount ΔV derived by the control unit 103. A control example will be described later.

  The control unit 103 also controls the processing capability of the CPU 301 based on the battery temperature reading result measured by the measurement unit 102. Details of a control example of the processing capability of the CPU 301 based on the battery temperature will be described later.

  The setting unit 104 sets a first time interval that is controlled by the control unit 103 based on the temperature measured by the measurement unit 102. In addition, when the temperature measured by the measurement unit 102 is the first temperature, the setting unit 104 sets the first time interval to the first interval i1, and sets the second temperature at which the temperature measured by the measurement unit 102 is higher than the first temperature. In this case, the first time interval is set to a second interval i2 longer than the first interval i1. The measurement of the first time interval is performed by a timer included in the electronic device 100. The timer may be, for example, a physical timer or a software program timer that can be executed by the CPU 301.

  FIG. 5 is an explanatory diagram illustrating an example of a set time interval. As shown in FIG. 5 (1), the first time interval is set so that the first time interval becomes longer as the battery temperature becomes higher, and the first time interval is set shorter as the battery temperature becomes lower. Also good.

  Further, as shown in FIG. 5 (2), a first time interval may be set by providing a threshold value for the battery temperature. Further, as shown in FIG. 5 (3), the first time interval may be set by providing a plurality of threshold values for the battery temperature. In the detailed description to be described later, an example shown in FIG.

  The setting unit 104 performs setting at a predetermined second time interval, and sets the second time interval based on the temperature measured by the measuring unit 102. The measurement of the second time interval is performed by a timer included in the electronic device 100. The timer may be, for example, a physical timer or a software program timer that can be executed by the CPU 301. Thereby, it is possible to suppress a shutdown due to a rapid drop in the battery voltage at a low temperature while suppressing a decrease in the battery voltage due to reading of the battery temperature at a high temperature. In addition, when the temperature measured by the measurement unit 102 is the first temperature, the setting unit 104 sets the second time interval to the first interval i1, and the temperature measured by the measurement unit 102 is higher than the first temperature. In this case, the second time interval is set to a second interval i2 longer than the first interval i1. The second time interval may be set similarly to the first time interval.

  In addition, the control unit 103 controls the processing capacity based on the battery temperature reading result measured by the measurement unit 102. The setting unit 104 performs setting based on the read result every time the control unit 103 performs the control. In this case, the first time interval and the second time interval are the same, and the control timing based on the first time interval and the setting timing based on the second time interval are performed by the same trigger. Thereby, since the control part 103 and the setting part 104 will perform each process by the reading of the same battery temperature, the reduction | decrease in the battery voltage by the reading of a battery temperature can be suppressed.

  Next, specific control and setting examples will be described. In the present embodiment, the control unit 103 controls the processing capacity of the CPU 301 by using a control table selected based on the change amount ΔV and the battery temperature from a plurality of control tables for controlling the processing capacity, for example.

  FIG. 6 is an explanatory diagram illustrating an example of a control table group. As shown in the graph showing the relationship between the battery temperature and the change amount ΔV described in the center of FIG. 6, the control unit 103 determines that the frequency of the clock signal supplied to the CPU 301 increases as the battery temperature increases. Select a control table that increases the Further, as shown in the graph shown in the center of FIG. 6, the control unit 103 selects the control table so that the operation of the own device becomes faster as the change amount ΔV is smaller. In the example of FIG. 6, the control tables include A1a, A1b, A2a, A2b, A3a, and A3b.

  Each of the control tables has fields for an upper limit of operation of the CPU 301 and an in-device temperature. The operation upper limit field of the CPU 301 further includes, for example, a clock field and a core number field. A clock frequency is set in the clock field. In the core number field, the number of cores to be operated among the cores included in the CPU 301 is set.

  The device temperature field further includes a set temperature field and a release temperature field. The set temperature is a temperature that lowers the upper limit of operation by one step when the temperature becomes equal to or higher than the described temperature. The release temperature is a temperature at which the upper limit of operation is increased by one step when the temperature exceeds the described temperature. The device internal temperature Tb is, for example, a temperature acquired from the thermistor 309 outside the CPU 301. T (cpu0) to T (cpu3) are temperatures acquired from the thermistors included in each of the cores included in the CPU 301, for example. Here, an example in which the CPU 301 includes four cores is given.

  Here, the threshold values for the battery temperature are T1 and T2. The relationship between T1 and T2 is T1> T2. For example, T1 and T2 are determined in advance by a designer or user of the electronic device 100 and stored in a storage device such as the ROM 302 or the RAM 303. Further, the threshold for the amount of change is ΔVa. For example, ΔVa is determined in advance by a designer or user of electronic device 100 and stored in a storage device such as ROM 302 or RAM 303.

  For example, the control unit 103 determines whether or not the battery temperature is equal to or higher than the threshold value T1. Further, for example, the control unit 103 determines whether or not the battery temperature is equal to or higher than the threshold value T2. For example, the control unit 103 determines whether or not the change amount ΔV is equal to or greater than the threshold value ΔVa.

  When it is determined that the battery temperature is equal to or higher than the threshold value T1 and not higher than the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A1a. Further, when it is determined that the battery temperature is equal to or higher than the threshold T1 and equal to or greater than the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A1b.

  When it is determined that the battery temperature is less than the threshold value T1, not less than the threshold value T2, and not more than the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A2a. Further, when it is determined that the battery temperature is less than the threshold value T1, greater than or equal to the threshold value T2, and greater than or equal to the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A2b. .

  When it is determined that the battery temperature is less than the threshold value T2 and not more than the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A3a. When it is determined that the battery temperature is less than the threshold value T2 and greater than or equal to the change amount ΔVa, for example, the control unit 103 controls the processing capability of the CPU 301 based on the control table A3b.

  Here, for example, the time interval C can be set to C1, C2, and C3, and the relationship between C1, C2, and C3 is C1> C2> C3. For example, the setting unit 104 determines whether or not the battery temperature is equal to or higher than the threshold value T1. For example, the setting unit 104 determines whether or not the battery temperature is equal to or higher than the threshold value T2.

  For example, when it is determined that the battery temperature is equal to or higher than the threshold T1, the control unit 103 sets the time interval C to the time interval C1. As described above, when the battery temperature is high, the cycle of performing the time interval for controlling the processing capability of the CPU 301 is lengthened. For this reason, it is possible to prevent the battery 310 from being deteriorated by controlling the processing capability of the CPU 301. For example, when it is determined that the battery temperature is lower than the threshold value T1 and the battery temperature is equal to or higher than the threshold value T2, the control unit 103 sets the time interval C to the time interval C2. For example, when it is determined that the battery temperature is lower than the threshold T2, the control unit 103 sets the time interval C to the time interval C3. As described above, when the battery temperature is low, the time interval for controlling the processing capability of the CPU 301 is shortened. For this reason, software shutdown due to a low temperature environment can be suppressed.

  In addition, since the comparison process between the battery temperature and the threshold values T1 and T2 by the control unit 103 and the comparison process between the battery temperature and the threshold values T1 and T2 by the setting unit 104 are the same process, one of the units is the other process. The processing result of the part may be diverted.

(Example of processing procedure performed by electronic device 100)
7 and 8 are flowcharts illustrating an example of processing procedures performed by the electronic device. The electronic device 100 determines whether it is a read timing based on the time interval C (step S701). When it is not the read timing based on the time interval C (step S701: No), the electronic device 100 returns to step S701. When it is the read timing based on the time interval C (step S701: Yes), the electronic device 100 acquires the battery temperature Tx and the battery voltage Vx (step S702). The electronic device 100 derives a change amount ΔV of voltage per time (step S703).

  Electronic device 100 determines whether or not battery temperature Tx ≧ threshold value T1 (step S704). When it is determined that battery temperature Tx ≧ threshold value T1 (step S704: Yes), electronic device 100 determines whether or not voltage change amount ΔV ≧ ΔVa is satisfied (step S705). When it is determined that the voltage change amount ΔV ≧ ΔVa is not satisfied (step S705: No), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A1a (step S706). The process proceeds to step S708.

  When it is determined that the voltage change amount ΔV ≧ ΔVa (step S705: Yes), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A1b (step S707). The process proceeds to step S708. After step S706 and step S707, electronic device 100 sets time interval C = C1 (step S708), and ends the series of processes.

  In step S704, when it is determined that the battery temperature Tx ≧ the threshold value T1 is not satisfied (step S704: No), the electronic device 100 determines whether the battery temperature Tx ≧ the threshold value T2 is satisfied (step S801). When it is determined that battery temperature Tx ≧ threshold value T2 (step S801: Yes), electronic device 100 determines whether or not voltage change amount ΔV ≧ ΔVa is satisfied (step S802).

  When it is determined that the voltage change amount ΔV ≧ ΔVa is not satisfied (step S802: No), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A2a (step S803). The process proceeds to step S805. When it is determined that the voltage change amount ΔV ≧ Va (step S802: Yes), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A2b (step S804). Then, the process proceeds to step S805. After step S803 and step S804, electronic device 100 sets time interval C = C2 (step S805), and ends the series of processes.

  If it is determined in step S801 that the battery temperature Tx ≧ the threshold value T2 is not satisfied (step S801: No), the electronic device 100 determines whether or not the voltage change amount ΔV ≧ ΔVa is satisfied (step S806). When it is determined that the voltage change amount ΔV ≧ ΔVa is not satisfied (step S806: No), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A3a (step S807). The process proceeds to step S809.

  If it is determined that the voltage change amount ΔV ≧ ΔVa (step S806: Yes), the electronic device 100 controls the processing capability of the CPU 301 based on the power supply voltage V, the CPU load factor, and the control table A3b (step S808). The process proceeds to step S809. After step S807 and step S808, electronic device 100 sets time interval C = C3 (step S809), and ends the series of processes.

  As described above, the electronic device 100 sets the time interval for controlling the processing capacity of the CPU according to the battery temperature. Thereby, the shutdown by the rapid fall of the battery voltage at the time of low temperature can be suppressed, suppressing the reduction of the battery voltage by the said control at the time of high temperature.

  The electronic device 100 sets the time interval to the first interval i1 when the measured temperature is the first temperature, and sets the time interval to the first interval i1 when the measured temperature is the second temperature higher than the first temperature. The long second interval i2 is set. Thereby, the shutdown by the rapid fall of the battery voltage at the time of low temperature can be suppressed, suppressing the reduction of the battery voltage by the said control at the time of high temperature.

  In addition, the electronic device 100 sets the time interval at a predetermined second time interval, and sets the second time interval based on the measured temperature. Thereby, it is possible to suppress a shutdown due to a rapid drop in the battery voltage at a low temperature while suppressing a decrease in the battery voltage due to the reading of the battery voltage at a high temperature.

  In addition, the electronic device 100 sets the second time interval to the first interval i1 when the measured temperature is the first temperature, and sets the second time interval to the first time when the measured temperature is the second temperature higher than the first temperature. The second interval i2 is longer than the one interval i1.

  Further, the electronic device 100 controls the processing capability based on the measured temperature reading result. The electronic device 100 performs setting based on the read result every time control is performed. By sharing the reading of the temperature for the control process and the reading of the temperature for the setting process, it is possible to suppress the reduction of the battery voltage due to the reading of the battery voltage.

  In addition, the electronic device 100 derives and derives the amount of change in voltage per time based on the amount of decrease in voltage after the end of charging of the battery and the elapsed time after the end of charging of the battery. Control processing capacity based on the amount of change. Thereby, it is possible to control the processing capability according to the amount of deterioration of the battery voltage, and it is possible to suppress a decrease in the processing performance while suppressing a decrease in the battery voltage.

  The setting method described in the present embodiment can be realized by executing a setting program prepared in advance on a computer such as a personal computer or a workstation. The setting program is recorded on a computer-readable recording medium such as a ROM or a nonvolatile memory, and is executed by being read from the recording medium by the computer. Further, the setting program may be distributed via a network such as the Internet.

  The following additional notes are disclosed with respect to the embodiment described above.

(Supplementary note 1) a battery for supplying voltage to the processor of its own device;
A measuring unit for measuring the temperature of the battery;
A control unit for controlling the processing capacity of the processor;
Based on the temperature measured by the measurement unit, a setting unit for setting a time interval for the control unit to perform the control;
An electronic device comprising:

(Supplementary Note 2) When the temperature measured by the measurement unit is the first temperature, the setting unit sets the time interval to the first interval, and the temperature measured by the measurement unit is higher than the first temperature. The electronic apparatus according to appendix 1, wherein the time interval is a second interval longer than the first interval in the case of two temperatures.

(Supplementary note 3) The setting unit performs the setting at a predetermined second time interval, and sets the second time interval based on the temperature measured by the measurement unit. 2. The electronic device according to 2.

(Supplementary Note 4) When the temperature measured by the measurement unit is the first temperature, the setting unit sets the second time interval to the first interval, and the temperature measured by the measurement unit is higher than the first temperature. The electronic apparatus according to appendix 3, wherein the second time interval is set to a second interval longer than the first interval when the second temperature is high.

(Additional remark 5) The said control part performs the control of the said processing capability based on the read-out result of the said temperature which the said measurement part measured,
The electronic device according to any one of appendices 1 to 4, wherein the setting unit performs the setting based on the read result every time the control unit performs the control.

(Additional remark 6) The said control part is the variation | change_quantity per time of the said voltage based on the decreasing amount of the said voltage after the charge of the said battery is complete | finished, and the elapsed time after the completion of the charge of the said battery. The electronic apparatus according to any one of appendices 1 to 5, wherein the processing capability is controlled based on the derived change amount.

(Appendix 7) a processor;
A battery for supplying voltage to the processor;
A measuring unit for measuring the temperature of the battery;
A setting program for an electronic device having
In the processor,
Control the processing power of the processor;
Based on the temperature measured by the measurement unit, setting a time interval for performing the control,
A setting program for executing a process.

(Appendix 8) a processor;
A battery for supplying voltage to the processor;
A measuring unit for measuring the temperature of the battery;
A method of setting an electronic device having
The processor is
Control the processing power of the processor;
Based on the temperature measured by the measurement unit, setting a time interval for performing the control,
A setting method characterized by executing processing.

DESCRIPTION OF SYMBOLS 100 Electronic device 101 Battery 102 Measuring part 103 Control part 104 Setting part 301 CPU
310 battery 321 battery 322 thermistor i1 first interval i2 second interval

Claims (5)

A battery that supplies voltage to the processor of the device,
A measuring unit for measuring the temperature of the battery;
A control unit for controlling the processing capacity of the processor;
Based on the temperature measured by the measurement unit, a setting unit for setting a time interval for the control unit to perform the control;
An electronic device comprising:   When the temperature measured by the measuring unit is a first temperature, the setting unit sets the time interval to a first interval, and the temperature measured by the measuring unit is a second temperature higher than the first temperature. The electronic apparatus according to claim 1, wherein the time interval is a second interval longer than the first interval.   3. The setting unit according to claim 1, wherein the setting unit performs the setting at a predetermined second time interval, and sets the second time interval based on the temperature measured by the measurement unit. Electronic equipment. The control unit performs control of the processing capacity based on a reading result of the temperature measured by the measurement unit,
The electronic device according to claim 1, wherein the setting unit performs the setting based on the read result every time the control unit performs the control.   The control unit derives a change amount of the voltage per time based on a decrease amount of the voltage after the charging of the battery is finished and an elapsed time after the charging of the battery is finished, The electronic apparatus according to claim 1, wherein the processing capability is controlled based on the derived amount of change.

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