JP4687403B2 - Electronic device, electronic device control method, electronic device control method program, and recording medium storing electronic device control method program - Google Patents

Description

  The present invention relates to an electronic device, a control method for the electronic device, a program for the control method for the electronic device, and a recording medium on which the program for the control method for the electronic device is recorded, and can be applied to, for example, a digital still camera. The present invention predicts the usage time from the past usage history, forms the state of hot boot storage in advance, and cancels the hot boot storage, thereby shortening the time required for startup by holding the hot boot. Reducing power consumption.

  Conventionally, even when the power is turned off by operating the power switch, the mobile device continues to supply power to the random access memory (RAM) that holds the program so that it can be executed. The time required for is reduced. Hereinafter, the process of continuously supplying the power to the memory and holding the program in the memory when the power is turned off is referred to as a hot boot holding process.

  According to this hot boot retention, it can be applied to, for example, a digital still camera, and a desired subject can be immediately photographed by turning on the power, and the user convenience can be improved accordingly.

  With respect to a method for shortening the time required for such activation, various methods have been conventionally proposed in, for example, Japanese Patent Application Laid-Open No. 2005-173620.

By the way, while the hot boot retention process can shorten the time required for startup, it has the disadvantage of continuing to consume power even when the power is turned off.This increases power consumption, and when applied to mobile devices, There is a problem of shortening the service life. If this problem can be solved, the user-friendliness can be further improved.
JP 2005-173620 A

  The present invention has been made in consideration of the above points. An electronic device, a method for controlling an electronic device, and an electronic device capable of reducing power consumption by shortening the time required for startup by hot boot retention. An object of the present invention is to propose a recording medium in which a program for a control method and a program for a control method of an electronic device are recorded.

  In order to solve this problem, the invention of claim 1 is applied to an electronic device that controls the operation of each unit by the arithmetic processing unit by executing the program by the arithmetic processing unit, and stores the program. And a program execution memory for starting up the operation by starting the supply of power and holding the program transferred from the program storage recording unit so as to be executable by the arithmetic processing unit; and a power supply circuit for outputting power to each unit; A timer for instructing the power supply circuit to start operation and a switch for instructing start and stop when the current time is measured and the current time is the operation switching time to hot boot storage or the release time of hot boot storage. And when the current time becomes the operation switching time to the hot boot storage, the program storage recording section records the current time. The program is transferred to the program execution memory to wait for the operation of the switch by hot boot storage, and the calculation of the program stored in the program execution memory by turning on the power of each part by the operation of the switch When execution by the processing unit is started and the current time becomes the release time of the hot boot save, the power supply to the program execution memory is stopped to release the hot boot save state, and the switch is operated The use start time and use end time are predicted from the use history, and the operation switching time to the hot boot storage and the release time of the hot boot storage are set in the timer based on the predicted use start time and use end time. .

  According to a second aspect of the present invention, after the program recorded in the program storage recording unit is transferred to the program execution memory in response to an activation instruction, the program recorded in the program execution memory is executed by the arithmetic processing unit. And applying to the control method of the electronic device for controlling the operation of each unit, and predicting the use start time and the use end time from the past use history, and the use start time by the predicting step , A start time setting step for setting an operation switching time to hot boot storage, an end time setting step for setting a release time for hot boot storage based on the use end time in the prediction step, and a current time measurement The current time measured by the current time measuring step and the current time measuring step is set as the start time. When the operation switching time to the hot boot storage by the step is reached, the program recorded in the program storage recording unit is transferred to the program execution memory, and the program is executed by the arithmetic processing unit for execution of the program The hot boot storage setting step for forming a hot boot storage state by holding in the memory, and the current time by the current time measurement step is the release time of the hot boot storage by the end time setting step. In this case, there is provided a hot boot storage canceling step of stopping the supply of power to the program execution memory and canceling the hot boot storage state.

  According to a ninth aspect of the present invention, there is provided a control for an electronic device for transferring a control program recorded in the program storage recording unit to the program execution memory so as to be executable by the arithmetic processing unit by execution by the arithmetic processing unit. Applying to the program of the method, a prediction step for predicting a use start time and a use end time from a past use history, and an operation switching time to hot boot storage based on the use start time in the prediction step A setting step of a starting time to be set; a setting step of an ending time for setting a release time of hot boot storage based on the use ending time in the predicting step; a measuring step of a current time for measuring a current time; The current time in the time measuring step is the hot boot storage in the start time setting step. The control program recorded in the program storage recording unit is transferred to the program execution memory, and the control program is held in the program execution memory so as to be executable by the arithmetic processing unit. When the current time in the hot boot storage setting step for forming the hot boot storage state and the current time measurement step is the release time of the hot boot storage in the end time setting step, the program is executed. A hot boot storage canceling step of canceling the hot boot storage state by stopping the supply of power to the memory for use.

  According to a tenth aspect of the present invention, there is provided a control of an electronic device that transfers a control program recorded in a program storage recording unit to a program execution memory so as to be executable by the arithmetic processing unit by execution by the arithmetic processing unit. Applying the method program to a recording medium on which the program is recorded, predicting the use start time and the use end time from the past use history, and using the start time by the prediction step, the hot start storage A start time setting step for setting the operation switching time, an end time setting step for setting a release time for hot boot storage based on the use end time in the prediction step, and a current time measurement for measuring the current time And the current time obtained by the current time measuring step is determined by the start time setting step. When the operation switching time to hot boot storage is reached, the control program recorded in the program storage recording unit is transferred to the program execution memory, and the control program is executed by the arithmetic processing unit. The hot boot storage setting step for forming a hot boot storage state by holding in the memory, and the current time by the current time measurement step is the release time of the hot boot storage by the end time setting step. In this case, there is provided a hot boot storage canceling step of stopping the supply of power to the program execution memory and canceling the hot boot storage state.

  According to the configuration of claim 1, a program storage recording unit that stores the program applied to an electronic device that controls the operation of each unit by the arithmetic processing unit by executing the program by the arithmetic processing unit, and starts supplying power The program execution memory that holds the program transferred from the program storage recording unit so as to be executable by the arithmetic processing unit, the power supply circuit that outputs power to each unit, and the current time are measured A timer for instructing the power supply circuit to start operation and a switch for instructing start and stop when the current time is an operation switching time to hot boot storage or a release time of hot boot storage, and the current time Is the operation switching time to the hot boot storage, the program recorded in the program storage recording unit is Transfer to the program execution memory and wait for the operation of the switch by hot boot storage, and turn on the power of each unit by the operation of the switch and execute the program stored in the program execution memory by the arithmetic processing unit When the current time becomes the release time of the hot boot save, the power supply to the program execution memory is stopped to release the hot boot save state, and the history of use by operating the switch is If the use start time and use end time are predicted and the operation switching time to the hot boot storage and the release time of the hot boot storage are set in the timer according to the predicted use start time and use end time, Estimated time should be set to hot boot save state to shorten startup time Thus, the power consumption can be reduced by canceling the hot boot save during the time when the use is not expected, thereby reducing the power consumption by shortening the time required for startup by holding the hot boot. it can.

  Thus, according to the configurations of claims 2, 9, and 10, the method for controlling an electronic device and the electronic device capable of reducing power consumption by shortening the time required for startup by hot boot retention It is possible to provide a recording medium on which the program of the control method and the program of the control method of the electronic device are recorded.

  According to the present invention, power consumption can be reduced by shortening the time required for startup by hot boot retention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

(1) Configuration of Embodiment FIG. 2 is a block diagram showing a digital still camera according to an embodiment of the present invention. The digital still camera 1 is one of mobile devices, and is operated by the power source of the battery 2 to acquire and record an imaging result and reproduce and display the recorded imaging result. For this reason, in the digital still camera 1, the main circuit block 3, which is a main circuit block that controls the functions of the digital still camera 1, includes an imaging unit that acquires an imaging result, a recording / reproducing unit that records and reproduces the imaging result, and an imaging result. A monitor unit or the like is provided for monitoring.

  Here, the battery 2 is a rechargeable secondary battery, is detachably held in the digital still camera 1, and outputs a power supply for operation to the power supply circuit 4.

  The power supply circuit 4 is operated by the power supply of the battery 2, and generates and outputs a charging power supply for the backup power supply 5 from the power supply of the battery 2 by monitoring the backup power supply 5.

  The power supply circuit 4 controls the power supply Vcc4 for operation of the main circuit block 3 by operating the power switch (power supply SW) 6. In other words, the power supply circuit 4 starts the operation of the digital still camera 1 by the operation of the power switch 6 and starts the operation of the main circuit block 3 by starting the output of the operation power supply Vcc4. Conversely, when the user instructs the stop of the operation of the digital still camera 1 by operating the power switch 6, the output of the operation power supply Vcc4 is stopped and the operation of the main circuit block 3 is stopped.

  Further, the power supply circuit 4 is linked with the output of the operation power supply Vcc4 to the main circuit block 3, and the central processing unit (CPU) 7 and the operation processing power supply Vcc1 which is the operation power supply for the program storage memory 8 The output is started, and the output of the arithmetic processing unit power supply Vcc1 is stopped. Further, the power supply circuit 4 triggers the arithmetic processing by a trigger from the timer 10 when it is time to switch the operation to the hot boot holding set in the timer 10 and when it is time to release the hot boot holding set in the timer 10. The output of the power supply Vcc1 for the unit is started, and the output of the power supply Vcc1 for the processing unit is stopped under the control of the central processing unit 7.

  When the power supply circuit 4 starts to output the arithmetic processing unit power supply Vcc1 in a state where the output of the operation power supply Vcc2 of the program execution memory 9 is stopped, the power supply circuit 4 also supplies the operation power supply Vcc2 of the program execution memory 9 together. Start output. Also, the control of the central processing unit 7 stops the output of the operation power supply Vcc2.

  The backup power source 5 is a rechargeable secondary battery built in the digital still camera 1, and always supplies the operation power source Vcc 3 to the timer 10.

  The timer 10 is operated by the operation power supply Vcc3, counts the current time, and notifies the central processing unit 7 of the current time according to an instruction from the central processing unit 7 via the interface I / F4. Also, the control of the central processing unit 7 via the interface I / F 4 accepts the setting of the time for switching the operation to hot boot holding and the time for releasing the hot boot holding, and when the current time becomes the set time, the power supply circuit A trigger is output to 4.

  The program storage memory 8 is a storage unit for storing a program for execution by the central processing unit 7, and is configured by a non-volatile memory such as a flash memory, for example. The program storage memory 8 outputs the stored program to the central processing unit 7 via the interface I / F 2 under the control of the central processing unit 7. The program storage memory 8 records and holds the usage history and usage prediction of the digital still camera 1 under the control of the central processing unit 7, and stores the usage history and usage prediction in the central processing unit 7. Notice.

  Here, as shown in FIG. 3, the history of use is formed by recording the date and time when the power source of the digital still camera 1 is turned on and the date and time when the power source is turned off by operating the power switch 6. The Thus, in the example of FIG. 3, the power of the digital still camera 1 was started on January 1, January 2,..., January 10, and the digital still camera 1 was used. On January 1st of these, the digital still camera 1 is powered on between 9:00 to 9:30, 12: 0 to 12:10, and 20: 0 to 21:00. It has been recorded.

  On the other hand, the use prediction indicates a time when the use of the digital still camera 1 is predicted, and in this embodiment, the use history is totaled by the central processing unit 7. That is, as shown in FIG. 4, on January 1, the digital still camera 1 is used between 9:00 to 9:30, 12: 0 to 12:10, and 20: 0 to 21:00. If the digital still camera 1 is used between 10:00 to 11:00 and 18: 0 to 18:30 on the following January 2, there is a high probability that it will be used again in these time zones. Outside of the time zone, it can be said that the probability of use is low. Thus, in this embodiment, these time zones are set as times when use is predicted, and other time zones are set as times when use is not predicted (unused time zone), thereby forming a use prediction.

  The program execution memory 9 is a memory that holds the program recorded in the program storage memory 8 so that the program can be executed by the central processing unit 7, and is constituted by a volatile memory having a high operation speed, such as an SRAM. Thus, the program execution memory 9 records and holds the program held in the program storage memory 8 under the control of the central processing unit 7 via the interface I / F 3, and the held program is stored in the central processing unit 7. Output to.

  As a result, as shown in FIG. 5, in the digital still camera 1, when the power is turned on without any operation being switched to the hot boot hold, the digital still camera 1 is recorded in a read only memory (not shown) by the central processing unit 7. The program stored in the program storage memory 8 is transferred to the program execution memory 9 by executing the processing procedure at the time of startup, and then the program transferred to the program execution memory 9 is executed by the central processing unit 7. Control the operation of each part. The program may be compressed and stored in the program storage memory 8. In this case, when the program is transferred to the program execution memory 9, the decompression process is executed by the central processing unit 7. The program execution memory 9 is expanded.

  In this way, in this embodiment, a program related to a series of processing procedures of the central processing unit 7 is provided by being preinstalled in the digital still camera 1, but instead of such preinstallation, an optical disc, It may be provided by being recorded on a recording medium such as a magnetic disk or a memory card, or may be provided by downloading via a network such as the Internet.

  Further, when the program is transferred from the program storage memory 8, the program execution memory 9 transfers and records the usage history and the usage prediction recorded in the program storage memory 8, and the central processing unit 7 This recording is notified to the central processing unit 7 under the control of

  The central processing unit 7 is arithmetic processing means for controlling the entire operation of the digital still camera 1 and starts up when the supply of the power supply Vcc1 from the power supply circuit 4 is started. FIG. 6 is a flowchart showing the processing procedure of the central processing unit 7 when it is activated by operating the power switch 6. When the central processing unit 7 starts operation by starting the supply of the driving power supply Vcc1 from the power supply circuit 4, the central processing unit 7 proceeds from step SP1 to step SP2 to determine whether or not the hot boot is held, that is, in the program execution memory 9. It is determined whether or not the program is stored so as to be executable. In this determination, when it is executed by determining the driving power supply Vcc2 of the program execution memory 9, it is executed by inquiry to the timer 10, or it is executed by determination of hot boot holding based on the usage history described later. It can be executed by determining the state and setting of each part related to hot boot retention.

  If a negative result is obtained in this step SP2, the central processing unit 7 moves from step SP2 to step SP3, and in this case, by executing the boot process which is a normal startup process, the central processing unit 7 stores it in the program storage memory 8. After the recorded program, usage history, and usage prediction are transferred to the program execution memory 9, the process proceeds to step SP4. On the other hand, if a positive result is obtained in step SP2, the process directly proceeds to step SP4.

  In step SP4, the central processing unit 7 controls the operation of each unit by executing a program stored in the program execution memory 9 in response to an operation of an operator (not shown) by the user.

  In the following step SP5, it is determined whether or not the user has instructed to turn off the power by operating the power switch 6. If a negative result is obtained here, step SP4 is repeated. As a result, the central processing unit 7 controls the operation of the main circuit block 3 in response to an operation by the user, and when the user gives an instruction to turn off the power, the process proceeds from step SP5 to step SP6.

  Here, the central processing unit 7 deletes the oldest record from the usage history recorded in the program execution memory 9, and in place of the deleted record, the time when the power is turned on for the current process, The time at which the power supply is turned off, which is the current time, is recorded in the usage history, thereby updating the usage history. The usage history stored in the program storage memory 8 is updated with the updated usage history.

  Subsequently, the process proceeds to step SP7, where the updated usage history is processed to detect the usage prediction again, and the record of the program execution memory 9 is updated and updated by the detected usage prediction. The record in the program storage memory 8 is updated by the recording.

  Subsequently, the central processing unit 7 moves to step SP8, and determines whether or not the current time is a time zone in which use is predicted, based on the use prediction recorded in the program execution memory 9. If a negative result is obtained here, the central processing unit 7 moves from step SP8 to step SP9, and the central processing unit 7, the power source Vcc1 for the program storage memory 8, the power source Vcc2 for the program execution memory 9, and the main circuit The power supply circuit 4 is instructed to stop the output of the power supply Vcc4 of the block unit, thereby moving to step SP10 and ending this processing procedure.

  On the other hand, if an affirmative result is obtained in step SP8, the process proceeds from step SP8 to step SP11 to stop the output of the central processing unit 7, the power source Vcc1 for the program storage memory 8, and the power source Vcc4 of the main circuit block unit. The circuit 4 is instructed, thereby forming a hot boot storage state for the program execution memory 9 so that the output of the power supply Vcc2 is continued, and the process proceeds to step SP10 and the processing procedure is terminated.

  As a result, the digital still camera 1 is configured such that when the hot boot save is set, the boot process is omitted and the operation is started, and the time required for activation can be shortened accordingly.

  That is, FIG. 7 is a state transition diagram showing the transition of the power supply related to this hot boot storage. In this digital still camera 1, only the power supply Vcc3 for operating the timer 10 is supplied in the state ST1 with the battery 2 removed. Set to state. When the battery 2 is installed and the hot boot storage state ST2 is set, only the power source Vcc2 of the program execution memory 9 storing the program and the power source Vcc3 for operating the timer 10 are supplied. When the power switch 6 is operated in this state, the supply of the power source Vcc2 to the central processing unit 7 and the power source Vcc4 to the main circuit block 3 is started and the operation state ST3 is entered. When the power switch 6 is operated in this state ST3, the supply of the power sources Vcc1 and Vcc4 is controlled to stop and the process returns to the hot boot storage state ST2.

  FIG. 8 is a diagram showing a state transition when the hot boot storage is not set, in comparison with FIG. In this case, the digital still camera 1 is set in a state in which only the operation power supply Vcc3 of the timer 10 is supplied in a state ST4 with the battery 2 removed. When the battery 2 is mounted, similarly, only the operation power Vcc3 for the timer 10 is set to the supplied state ST5, and the operation of the power switch 6 starts the supply of the remaining power Vcc1, Vcc2, and Vcc4. Thus, the operation state ST6 is entered, and it takes time to rise to the operation state ST6 because the hot boot is not stored.

  Accordingly, the central processing unit 7 operates by setting the timer 10 to set the time to rise to the hot boot storage state and the release time of the hot boot storage based on the prediction of use by executing the processing procedure of FIG. Switch. In other words, the central processing unit 7 starts this processing procedure when the supply of the power supply Vcc1 is started by the notification from the timer 10 and starts its operation, and then proceeds from step SP21 to step SP22. Here, the central processing unit 7 determines whether or not the current state is a hot boot holding state.

  If a negative result is obtained in this step SP22, the central processing unit 7 moves from step SP22 to step SP23, where the program recorded in the program storage memory 8 by executing the boot process which is a normal startup process. After the usage history and usage prediction are transferred to the program execution memory 9, the process proceeds to step SP24.

  In this case, the central processing unit 7 detects the time for releasing the hot boot storage state next by predicting the use by setting the hot boot storage state by executing this processing. Set the time in timer 10. In this case, specifically, the start time of the time zone in which the next non-use is predicted is set to the time for releasing the hot boot storage state and set in the timer 10. In this way, in this embodiment, the end time of the time zone in which the current use is predicted is set to the time for releasing the hot boot storage state. In the subsequent step SP25, the setting is made so as to continue the supply of the driving power Vcc2 to the program execution memory 9, the power Vcc1 of the central processing unit 7 is lowered, and this processing procedure is terminated in the subsequent step SP26. To do.

  On the other hand, if an affirmative result is obtained in step SP22, in this case, the hot boot save is canceled by executing this processing procedure, and in the following step SP27, the time when the operation is next switched to the hot boot save state. Is detected from the prediction of use, and the detected time is set in the timer 10. In this case, the central processing unit 7 is earlier than the use start time detected from the use prediction by a fixed time so as to be surely in the hot boot storage state in the time zone in which the next use is predicted. Set the time to the time to switch the operation to the hot boot save state. In step SP28, the drive power supply Vcc2 to the program execution memory 9 and the power supply Vcc1 of the central processing unit 7 are both turned off to cancel the hot boot storage state. Then, in step SP26, this processing procedure is terminated. .

  As a result, in this embodiment, in the digital still camera 1, as shown by step SP31 in FIG. 9, the program is transferred to the program execution memory 9, and the supply of the power source Vcc2 to the program execution memory 9 is continued. When the hot boot storage state is set, as shown in step SP32, it waits until the time zone estimated to be unused by the time measurement by the timer 10, and when the time zone is estimated to be unused, At the next step SP33, the time to set the hot boot storage state next is set in the timer 10, and at the next step SP34, the power of the program execution memory 9 is turned off to cancel the hot boot storage state.

  In addition, once the hot boot storage state is canceled in this manner, in step SP35, the process waits until the time zone estimated to be used by the time measurement by the timer 10 is reached, and the time zone estimated to be used. Then, in subsequent steps SP36 and 37, the operation is set to the hot boot storage state.

  In this way, the operation is switched between the hot boot storage state and the hot boot storage cancellation, and as shown by step SP41 in FIG. 10 in comparison with FIG. 9, the power switch 6 is switched in the hot boot storage state. When the operation is stopped by the operation, as shown in step SP42 and step SP43, the rising time of the operation to the next hot boot storage is set in the timer 10 and then the operation is stopped in the released state of the hot boot storage. The operation may be switched between the hot boot storage state and the release of the hot boot storage.

(2) Operation of the embodiment In the above configuration, in the digital still camera 1 (FIG. 2), the power supply circuit 4 starts supplying power to each part by the operation of the power switch 6, thereby the main circuit block 3 operates. To start. In addition, the supply of the power Vcc1 to the central processing unit 7 and the program storage memory 8 is started, and the supply of the power Vcc2 to the program execution memory 9 is started. Also, by starting this operation, the program stored in the program storage memory 8 is transferred to the program execution memory 9 so that the central processing unit 7 can execute the program. As a result, a series of processes related to the start-up is completed, and the digital still camera 1 executes the program stored in the program execution memory 9 by the central processing unit 7 in response to the operation by the user, whereby the central processing unit 7 Thus, processing such as acquisition of imaging results is performed by controlling the operation of each unit.

  However, when starting the operation by transferring the program or the like stored in the program storage memory 8 to the program execution memory 9 at the time of startup in this way, the time required for the startup becomes longer and the usability for the user is remarkably deteriorated. To do. In particular, the flash memory applied to the program storage memory 8 has a disadvantage that the operation speed is slow, and this increases the time required for the start-up, thereby deteriorating the usability for the user.

  As a result, even when the hot boot storage technique is applied and the power supply is turned off, the power supply Vcc2 is continuously supplied to the program execution memory 9 so that it is stored in the program storage memory 8 at startup. The transfer process to the program execution memory 9 such as a program can be omitted, and the time required for activation can be remarkably shortened.

  However, in this case, the digital still camera 1 consumes power even if it is not used at all, and the power consumption increases as compared with the case where the hot boot storage method is not applied. This also occurs when the power source of the battery 2 is exhausted without knowing it.

  Thus, in the digital still camera 1, when the power is turned off by operating the power switch 6, the use start time and use end time are recorded by the central processing unit 7, thereby recording the use history (FIG. 6). In addition, a time zone in which use is predicted by the user is detected from the use history.

  In the digital still camera 1, when the use time is predicted and the start time of the time zone in which use is predicted by the user is reached, the operation of the power supply circuit 4 is started by the timer 10, the central processing unit 7, and the program storage memory 8. Then, supply of the power sources Vcc1 and Vcc2 to the program execution memory 9 is started, and the program stored in the program storage memory 8 is transferred to the program execution memory 9 by the process when the central processing unit 7 is activated. Thereafter, the power Vcc2 is continuously supplied to the program execution memory 9, and the power supply Vcc1 of the central processing unit 7 and the program storage memory 8 is turned off. It is formed.

  On the other hand, when the time zone in which the use is predicted elapses, the operation of the power supply circuit 4 is started up by the timer 10 in the same manner, and the time for forming the hot boot storage state is set in the timer 10 by the central processing unit 7. After the setting, the central processing unit 7, the power source Vcc1 of the program storage memory 8 and the power source Vcc2 of the program execution memory 9 are turned off, thereby canceling the hot boot storage.

  As a result, in this digital still camera 1, the hot boot storage state is formed only during the time period in which the user's use is predicted from the past use history, thereby shortening the time required for activation and the time when the use is not predicted. In that case, it is possible to reduce the power consumption by canceling the hot boot save, thereby reducing the power consumption by shortening the time required for startup by holding the hot boot. Battery life can be extended.

  Further, in this way, the hot boot storage state is formed only during the time period in which the user's use is predicted, and in the digital still camera 1, the use start is predicted from the past use history for a certain period of time. The timer 10 is set with an operation switching time to the hot boot storage state so as to form the hot boot storage state at an earlier time, so that the user can reliably save the hot boot storage when desired to use it. The power supply can be started up in a state, and the usability can be improved accordingly.

(3) Advantages of the embodiment According to the above configuration, hot boot retention is achieved by predicting the usage time from the past usage history, forming a hot boot storage state in advance, and releasing the hot boot storage. Thus, the power consumption can be reduced by shortening the time required for activation.

  Accordingly, it is possible to extend the life of the battery by applying it to a mobile device operated by the battery.

  In addition, by switching the operation to hot boot hold at a time that is a certain time faster than the expected use time, if the user wants to use, the power can be turned on reliably in the hot boot storage state. Minutes, usability can be improved.

  In the digital still camera according to the present embodiment, similarly to the digital still camera 1 described above with respect to the first embodiment, the use time is predicted from the past use history, and a hot boot storage state is formed in advance. The storage is canceled, and the operation is switched to the hot boot hold at a time that is faster than the time when the use is predicted by a certain time. In the digital still camera 1, various settings are received by a user operation on the menu screen, and a certain time for switching the operation to the hot boot holding is received by the user settings. The digital still camera according to this embodiment is configured in the same manner as the digital still camera 1 described above with respect to the first embodiment, except for the configuration related to the setting of the predetermined time.

  According to this embodiment, the user can set the fixed time by switching the operation to the hot boot hold at a time that is faster than the predicted use time by a certain time. It is possible to improve the usability of the user by forming a hot boot storage state.

  In the digital still camera according to the present embodiment, similarly to the digital still camera 1 described above with respect to the first embodiment, the use time is predicted from the past use history to form a hot boot storage state, and the hot boot storage is performed. To release. In the digital still camera 1, the operation is further switched from the hot boot save release state to the hot boot save state by a setting operation by the user. Further, when the operation is switched to the hot boot save state in this way, the hot boot save is canceled by a user operation. Thus, in the digital still camera according to this embodiment, the hot boot save setting is accepted by the user's operation in preference to the hot boot save setting based on the usage history. The digital still camera according to the present embodiment is configured in the same manner as the digital still camera 1 described above with respect to the first embodiment except for the configuration related to the setting of hot boot storage by the user operation.

  According to this embodiment, in response to a user instruction, the operation is switched from the state in which the hot boot storage is canceled to the state of the hot boot storage, so that the state of the hot boot storage is further formed as the user intends. Usability can be improved.

  In the digital still camera according to this embodiment, setting of a usage history for use prediction is received by a user operation. The digital still camera according to this embodiment is configured in the same manner as the digital still camera according to the above-described embodiment, except that the processing related to the prediction of use is different.

  If the setting of the usage history used for the prediction of usage is accepted as in this embodiment, the usage prediction can be switched between, for example, daily life and special cases such as travel, thereby improving usability. it can.

  That is, in a digital still camera, the use time zone is often different between use in normal daily life and use in travel or the like. As a result, in such a case, the digital still camera 1 described above with respect to the first embodiment cannot effectively achieve the power saving effect and the effect of shortening the startup time. However, as in this embodiment, if the setting of usage history for use prediction is accepted by the user, the usage prediction can be detected appropriately from time to time, and the user convenience is improved accordingly. can do.

  In the digital still camera according to the present embodiment, by using the operation mode set by the user, similarly to the digital still camera 1 described above with respect to the first embodiment, the use time is predicted from the past use history and the hot boot storage is performed in advance. Create a state and release hot boot save. The digital still camera according to this embodiment is configured in the same manner as the digital still camera according to the above-described embodiment, except that the processing relating to the setting of the operation mode is different.

  As in this embodiment, the hot boot save state is formed from the usage history according to the user's instruction, and if the hot boot save is canceled, the hot boot save state is further formed as the user intends. And user convenience can be improved.

  In the above-described embodiment, the case has been described in which the usage history is simply aggregated to detect the usage prediction, but the present invention is not limited to this, and in the method of predicting usage from the usage history, Various methods of statistically processing the usage history can be widely applied.

  In the above-described embodiment, the case where the program of the central processing unit is stored in the program storage memory has been described, but the present invention is not limited thereto, and the program is stored in various recording units such as a hard disk device, for example. The present invention can be widely applied when the stored program is transferred to a memory and can be executed.

  In the above-described embodiments, the case where the present invention is applied to a digital still camera that is a mobile device has been described. However, the present invention is not limited to this, and various mobile devices that are operated by a battery such as a mobile phone or a digital video camera. The present invention can be widely applied to devices, and can also be widely applied to various electronic devices that operate with a power source other than a battery.

  The present invention relates to an electronic device, a control method for the electronic device, a program for the control method for the electronic device, and a recording medium on which the program for the control method for the electronic device is recorded, and can be applied to, for example, a digital still camera.

It is a flowchart which shows the process sequence at the time of starting by the timer of the central processing unit in the digital still camera which concerns on Example 1 of this invention. It is a block diagram which shows the digital still camera which concerns on Example 1 of this invention. 3 is a chart for explaining a history of use in the digital still camera of FIG. 2. 3 is a chart for explaining prediction of use in the digital still camera of FIG. 2. It is a block diagram with which it uses for description of the transfer of the program in the digital still camera of FIG. 3 is a flowchart showing a processing procedure when a central processing unit is powered on in the digital still camera of FIG. 2. It is a state transition diagram which shows the state transition at the time of hot boot preservation | save. It is a state transition diagram which shows the state transition which cancel | released hot boot preservation | save. 3 is a flowchart for explaining an operation of hot boot storage in the digital still camera of FIG. 2. 3 is a flowchart for explaining an operation when the power is turned off in the digital still camera of FIG. 2.

Explanation of symbols

1 ... Digital still camera, 2 ... Battery, 3 ... Main circuit block, 4 ... Power supply circuit, 6 ... Power switch, 7 ... Central processing unit, 8 ... Program storage memory, 9 ... Program Execution memory, 10 ... Timer

Claims (13)

A program storage recording unit that stores the program in an electronic device that controls the operation of each unit by the arithmetic processing unit by executing the program by the arithmetic processing unit;
A volatile program execution memory for holding the program transferred from the program storage recording unit so as to be executable by the arithmetic processing unit;
A power supply circuit that outputs power to each part;
Measuring the current time, when the current time is the operation switching time to hot boot storage or the release time of hot boot storage, a timer that instructs the power supply circuit to start operation,
With
The use start time and use end time are predicted from the use history of the electronic device, and the operation switching time to the hot boot save and the release time of the hot boot save are determined based on the predicted use start time and use end time. Set the timer,
When the current time is the operation switching time to the hot boot storage, the timer instructs the power supply circuit to supply power to the arithmetic processing unit and the program execution memory, and the arithmetic processing unit Instructing to stop the supply of power to the arithmetic processing unit after transferring the program recorded in the storage recording unit and the history of use of the electronic device to the program execution memory,
When the current time becomes the release time of the hot boot save, the timer stops the supply of power from the power supply circuit to the program execution memory to release the hot boot save state. The electronic device further includes a switch for instructing on / off of power of the electronic device,
  The electronic device according to claim 1, wherein the use history of the electronic device is a use history by an operation on the switch. The electronic device further includes a switch for setting an operation mode of the electronic device,
  The electronic device according to claim 1, wherein the use history of the electronic device is a use history by an operation on the switch. The arithmetic processing unit adds a power-on time and a power-down time by a user's switch operation in the usage history of the electronic device transferred to the program execution memory, and the oldest power-on Update the history of use of the electronic device by deleting the record of the time of
  The electronic device according to claim 1, wherein the program storage recording unit holds a history of use of the electronic device after being updated by the arithmetic processing unit. In response to the activation instruction, the program recorded in the program storage recording unit is transferred to the program execution memory, and then the program recorded in the program execution memory is executed by the arithmetic processing unit to control the operation of each unit. In the control method of electronic equipment,
A prediction step of predicting a use start time and a use end time from a history of use of the electronic device ;
A start time setting step for setting an operation switching time to hot boot storage by the use start time in the prediction step;
An end time setting step for setting a release time of hot boot storage based on the use end time in the prediction step;
A current time measurement step for measuring the current time;
When the current time in the current time measurement step is the operation switching time to the hot boot storage in the start time setting step , power is supplied from the power supply circuit to the arithmetic processing unit and the program execution memory. The operation processing unit transfers the program recorded in the program storage recording unit and the history of use of the electronic device to the program execution memory, and then stops supplying power to the operation processing unit. A step of instructing
When the current time in the current time measurement step is the release time of the hot boot storage in the end time setting step, supply of power from the power supply circuit to the program execution memory is stopped to And a hot boot save canceling step for canceling the boot save state. The electronic device is
The electronic device control method according to claim 5 , wherein the mobile device is operated by a battery power source. The start time setting step includes:
The method for controlling an electronic device according to claim 5 , wherein the operation switching time to the hot boot storage is set at a time earlier than the use start time in the prediction step. The start time setting step includes:
Set the operation switching time to the hot boot storage at a time earlier than the use start time by the prediction step by a certain time,
The method for controlling the electronic device includes:
The method for controlling an electronic device according to claim 5 , further comprising a time setting step of accepting the setting of the predetermined time. The electronic device control method according to claim 5 , further comprising a setting step by a user that switches an operation from a state in which the hot boot storage is canceled to a state of the hot boot storage in accordance with an instruction from a user. The method of controlling an electronic device according to claim 5 , further comprising a history setting step of accepting a setting of the past usage history used for prediction of the use start time and use end time. 6. The method of controlling an electronic device according to claim 5 , further comprising a control step of stopping execution of the hot boot save setting step and the hot boot save release step according to a setting by a user. In the program of the control method of the electronic device that transfers the control program recorded in the program storage recording unit by execution by the arithmetic processing unit to the program execution memory so as to be executable by the arithmetic processing unit,
A prediction step of predicting a use start time and a use end time from a history of use of the electronic device ;
A start time setting step for setting an operation switching time to hot boot storage by the use start time in the prediction step;
An end time setting step for setting a release time of hot boot storage based on the use end time in the prediction step;
A current time measurement step for measuring the current time;
When the current time in the current time measurement step is the operation switching time to the hot boot storage in the start time setting step , power is supplied from the power supply circuit to the arithmetic processing unit and the program execution memory. The operation processing unit transfers the program recorded in the program storage recording unit and the history of use of the electronic device to the program execution memory, and then stops supplying power to the operation processing unit. A step of instructing
When the current time in the current time measurement step is the release time of the hot boot storage in the end time setting step, supply of power from the power supply circuit to the program execution memory is stopped to And a hot boot save canceling step for canceling the boot save state. Recording medium on which a control program recorded in a program storage recording unit is transferred to a program execution memory so as to be executable by the arithmetic processing unit and held by execution by the arithmetic processing unit. In
A prediction step of predicting a use start time and a use end time from a history of use of the electronic device ;
A start time setting step for setting an operation switching time to hot boot storage by the use start time in the prediction step;
An end time setting step for setting a release time of hot boot storage based on the use end time in the prediction step;
A current time measurement step for measuring the current time;
When the current time in the current time measurement step is the operation switching time to the hot boot storage in the start time setting step , power is supplied from the power supply circuit to the arithmetic processing unit and the program execution memory. The operation processing unit transfers the program recorded in the program storage recording unit and the history of use of the electronic device to the program execution memory, and then stops supplying power to the operation processing unit. A step of instructing
When the current time in the current time measurement step is the release time of the hot boot storage in the end time setting step, supply of power from the power supply circuit to the program execution memory is stopped to And a hot boot storage canceling step for canceling the boot storage state.

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