JP2011036042A - Electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electronic apparatus for informing a user of charging time required for making desired processings executed. <P>SOLUTION: When charging of the electronic apparatus is started (S11:YES), the termination time when target capacity is charged is decided from remaining capacity of a charging-type battery and target capacity required, when display data displayed on a display panel is rewritten for the prescribed number of times (S13). The termination time decided is displayed on the display panel (S15), and charging to the battery is started (S17). The present time is compared with termination time (S23). When both times agree (S23:YES), information for giving a notice that charging is completed is displayed on the display panel, since charging of the target capacity is terminated (S25). The user can previously recognize how much charging is to be performed for making the electronic apparatus perform the processing for rewriting display data for the prescribed number of times. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electronic device. More particularly, the present invention relates to an electronic device driven by a rechargeable battery.

  When an electronic device driven by a rechargeable battery is used for a certain period of time and the rechargeable battery is consumed and a predetermined electromotive force cannot be obtained, the rechargeable battery must be charged. Therefore, in such an electronic device, convenience is improved by providing the user with a function for recognizing the approximate usable capacity and usable time of the rechargeable battery. For example, in the display device described in Patent Literature 1, the number of pages that can be displayed is notified to the user based on the remaining battery level. The user can grasp the number of pages that can be displayed based on the remaining battery capacity.

Japanese Patent Laying-Open No. 2005-164672

  In the electronic device having the above-described function, when it is determined that the rechargeable battery is consumed during use and the desired processing cannot be executed due to the remaining battery capacity, the user charges the rechargeable battery. There is a need. Here, the user does not know the charging time of the rechargeable battery necessary for causing the electronic device to execute a desired process. For this reason, if charging is stopped in the middle, there is a problem that the electronic device may not be able to execute a desired process even after charging due to insufficient charging of the rechargeable battery.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an electronic device that notifies a user of a time at which charging necessary to execute a desired process is completed. .

  In order to solve the above-described problem, an electronic device according to a first aspect of the present invention is an electronic device that operates using a rechargeable battery as a power source, and specifies a remaining capacity that is a capacity remaining in the rechargeable battery. Capacity specifying means; first determining means for determining a target capacity that is a capacity of the rechargeable battery required when the electronic device performs a predetermined operation; and the target capacity determined by the first determining means; Determining a charging time, which is a time required for charging the rechargeable battery until the capacity of the rechargeable battery reaches the target capacity, from the remaining capacity specified by the capacity specifying means; And third determination means for determining end time information indicating a time when charging of the rechargeable battery to the target capacity is completed based on the charging time determined by the second determination means. And a notifying means for notifying the end timing information determined by the third determining means to the user.

  In addition to the configuration of the invention described in claim 1, the electronic apparatus according to claim 2 requires electric power only when rewriting an image being displayed, and the image is supplied even when power supply is cut off. Non-volatile display means capable of holding the image, and the first determining means is the number of rewrites required when rewriting the image being displayed on the display means as the predetermined operation, and is necessary for rewriting. The target capacity is determined based on the capacity per one time, and the notification means notifies the user by displaying the end time information on the display means.

  According to a third aspect of the invention, in addition to the configuration of the second aspect of the invention, the electronic device includes a first storage unit that stores the number of times the image has been rewritten, and the first storage unit. Average determining means for determining an average number of times of rewriting performed within a predetermined period based on the stored number of times, wherein the first determining means is determined by the average determining means Further, the target capacity required when the operation of rewriting the image for the average number of times is performed as the predetermined operation is determined.

  According to a fourth aspect of the invention, in addition to the configuration of the second aspect of the invention, the electronic device includes a first storage unit that stores the number of times the image has been rewritten, and the first storage unit. Maximum determination means for determining a maximum number of times that is the maximum of the cumulative number for each predetermined period based on the stored number of times, wherein the first determination means is the maximum number of times determined by the maximum determination means The target capacity required when the image rewriting operation for a minute is performed as the predetermined operation is determined.

  According to a fifth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the electronic apparatus includes a second storage unit that stores the number of times the image has been rewritten the previous day. The determining means determines the target capacity that is required when the operation for rewriting the image for the number of times stored in the second storage means is performed as the predetermined operation.

  According to a sixth aspect of the invention, in addition to the configuration of the second aspect of the invention, the electronic device includes display data information for specifying display data which is data of the image to be displayed on the display means, and the display Third storage means for storing the number of pages of data in association with each other, wherein the first determination means corresponds to predetermined display data information among the display data information stored in the third storage means The number of attached pages is extracted, and the target capacity necessary for performing the operation of rewriting the image for the extracted number of pages as the predetermined operation is determined.

  According to a seventh aspect of the present invention, in addition to the configuration of the sixth aspect of the invention, the first determining means uses the display data information designated by the user as the predetermined display data information, The target capacity required to perform an operation of rewriting the image for the number of pages associated with the predetermined display data information as the predetermined operation is determined.

  According to an eighth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the electronic device according to the eighth aspect is provided when the user selects the display data to be displayed on the display means in the third storage means. The number of selections is stored in association with the display data information of the selected display data and the number of pages, and the first determination unit is configured to store the number of selections stored in the third storage unit. The operation of rewriting the image for the number of pages associated with the predetermined display data information, using the display data information associated with the largest selection number of times as the predetermined display data information. And determining the target capacity required to perform the process.

  According to a ninth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the electronic device according to the ninth aspect is provided when the user selects the display data to be displayed on the display means in the third storage means. The number of selections is stored in association with the display data information of the selected display data and the number of pages, and the first determination means is based on the number of selections stored in the third storage means. The predetermined number is extracted in descending order of the number of selections, the display data information associated with the extracted selection number is set as the predetermined display data information, and the page associated with the predetermined display data information The target capacity required to perform an operation of rewriting the image for several minutes as the predetermined operation is determined.

  According to a tenth aspect of the present invention, in addition to the configuration of the second aspect of the invention, the electronic device according to the tenth aspect has the third storage unit in which the display data to be displayed on the display unit is selected by the user. The number of selections is stored in association with the display data information of the selected display data and the number of pages, and the first determination unit is configured to store the number of selections stored in the third storage unit. The operation of rewriting the image for the number of pages associated with the predetermined display data information, using the display data information associated with the number of selections greater than or equal to the predetermined number as the predetermined display data information. The target capacity required for performing the predetermined operation is determined.

  According to an eleventh aspect of the present invention, in addition to the configuration of the seventh aspect of the invention, the first determining unit is configured to display the end time information on the display unit in a user state. When the display data information specified by the above is changed, the display data information after the change is set as the predetermined display data information, and the number of the images corresponding to the number of pages associated with the predetermined display data information is changed. The target capacity required for performing the rewriting operation as the predetermined operation is determined, and the third determination means is configured to determine whether the target capacity is based on the display data information after the change in the first determination means. If determined, the end timing information is determined based on the newly determined target capacity, and the notifying means is determined by the third determining means based on the new target capacity. The end timing information, and notifies the user.

  An electronic device according to a twelfth aspect of the invention is the electronic device according to any one of the first to eleventh aspects, wherein the rechargeable battery is charged via an AC adapter or via a USB. A method determining unit that determines whether the rechargeable battery is charged via the USB. The second determining unit includes: USB charging time, which is the charging time when the rechargeable battery is charged via the AC adapter, and AC charging time, which is the charging time when the rechargeable battery is charged via the AC adapter, The third determining means determines the USB end time information, which is the end time information based on the USB charge time, and the AC, which is the end time information, based on the AC charge time. Determining a completion time information, the notification unit may notify the the determined the USB end timing information and said AC termination time information in said third determining means to the user.

  According to a thirteenth aspect of the present invention, in addition to the configuration of the invention according to any one of the first to twelfth aspects, the third determining means indicates a time at which charging to the target capacity is completed. End time information is determined, and the notification means notifies the user of the end time information determined by the third determination means.

  An electronic apparatus according to a fourteenth aspect of the invention includes a start detection unit that detects a start of an operation for charging the rechargeable battery, in addition to the configuration of the invention according to the thirteenth aspect, The first determining means determines the target capacity when the operation is detected by the start detecting means, and the third determining means indicates the time when the operation is detected by the start detecting means. The end time information is determined based on start time information.

  In the electronic device according to the first aspect of the invention, the user can recognize from the end time information how long it is necessary to charge the electronic device in order to cause the electronic device to execute the predetermined operation. When the time for charging is limited, it is possible to recognize whether or not charging can be performed to such an extent that the electronic device can perform a predetermined operation within the limited time.

  In addition, in the electronic device of the invention according to claim 2, in addition to the effect of the invention of claim 1, the end time information is determined based on the number of times of rewriting when the image being displayed on the nonvolatile display means is rewritten. Is done. The user can recognize from the end time information how long it is necessary to charge in order to cause the electronic device to rewrite the image a predetermined number of times.

  In addition, in the electronic device according to the third aspect, in addition to the effect of the second aspect, the average number of rewrites performed within a predetermined period is determined. The user can recognize from the end time information how long it is necessary to charge in order to cause the electronic device to rewrite the image for the determined average number of times.

  In the electronic device according to the fourth aspect of the invention, in addition to the effect of the invention according to the second aspect, the maximum number of cumulative times per predetermined period is determined. The user can recognize from the end time information how long it is necessary to charge in order to cause the electronic device to rewrite the image for the determined maximum number of times.

  In addition, in the electronic device according to the fifth aspect of the invention, in addition to the effect of the invention of the second aspect, until what time the user causes the electronic device to rewrite the image for the number of times of rewriting performed on the previous day. Whether or not charging has to be performed can be recognized from the end time information.

  In the electronic device according to the sixth aspect of the invention, in addition to the effect of the invention according to the second aspect, the user can use the electronic device at any time to cause the electronic device to rewrite the image corresponding to the number of pages of the predetermined display data. It can be recognized from the end time information whether or not the charging must be performed.

  In the electronic device according to the seventh aspect of the invention, in addition to the effect of the invention according to the sixth aspect, when the user causes the electronic device to rewrite the image for the number of pages of the designated display data, It can be recognized from the end time information whether or not the charging must be performed.

  In the electronic device according to the eighth aspect of the invention, in addition to the effect of the invention according to the second aspect, the user causes the electronic device to rewrite images corresponding to the number of pages of display data having the highest selection frequency. Therefore, it can be recognized from the end time information how long it has to be charged.

  Further, in the electronic device according to the ninth aspect of the invention, in addition to the effect of the invention according to the second aspect, when the user browses all of the display data with a relatively high selection frequency on the electronic device 1, It can be recognized from the end time information whether or not the charging must be performed.

  Further, in the electronic device according to the tenth aspect of the invention, in addition to the effect of the invention according to the second aspect, in order for the user to view all the display data whose selection frequency is a predetermined number of times or more on the electronic device 1. It can be recognized from the end time information how long it is necessary to charge.

  In the electronic device according to the eleventh aspect, in addition to the effect of the seventh aspect, even if the display data specified by the user is changed, the number of pages of the display data after the change End time information is determined based on the above. The user can recognize from the end time information how long it is necessary to charge in order to cause the electronic device to rewrite the image for the number of pages of the display data after the change.

  In addition, in the electronic device according to the twelfth aspect, in addition to the effect of the invention according to any one of the first to eleventh aspects, when the rechargeable battery is charged via the USB, the rechargeable battery via the AC adapter is used. Compared to charging a battery, the time required to charge the same capacity is longer. Therefore, when the rechargeable battery is charged via the USB, the end time information (AC end time information) when the rechargeable battery is charged via the AC adapter is combined with the USB end time information. To notify. Thus, even when the user is charging the rechargeable battery via the USB, the user can recognize the end time information when the rechargeable battery is charged via the AC adapter.

  In addition, in the electronic device according to the thirteenth aspect, in addition to the effect of the invention according to any one of the first to twelfth aspects, the user charges until what time the electronic device performs a predetermined operation. It can be recognized from the end time information whether it must be present.

  In addition, in the electronic device according to the fourteenth aspect, in addition to the effect of the thirteenth aspect, when the charging operation is started, the end time information is determined by the first determination unit to the third determination unit. Then, the end time information is notified by the notification means. At the time of charging operation of an electronic device, it is possible to recognize how long it must be charged.

1 is a schematic diagram showing an outline of an electronic device 1. FIG. 2 is a block diagram showing an electrical configuration of the electronic apparatus 1. FIG. It is a graph which shows an example of the data which show the relationship between a remaining capacity and a voltage. It is a graph which shows an example of the data which show the relationship between charging time and battery capacity. It is a schematic diagram which shows the display table 2711 which is an example of a display table. It is a mimetic diagram showing history information 2721 which is an example of history information. It is a flowchart which shows a display process. It is a flowchart which shows an end time determination process. 6 is a schematic diagram illustrating an example of a state in which end time information is displayed on the display panel 22. FIG.

  Hereinafter, an electronic device 1 embodying an electronic device according to the present invention will be described with reference to the drawings. These drawings are used to explain the technical features that can be adopted by the present invention, and the configuration of the terminal and the flowcharts of various processes described are not intended to limit the present invention. It is just an illustrative example.

  An overview of the electronic device 1 will be described with reference to FIG. The electronic device 1 has a substantially rectangular shape when viewed from the front. The electronic device 1 includes a substantially rectangular display panel 22 on the front side. The display panel 22 is composed of a nonvolatile display element. A non-volatile display element has a characteristic that power is required only when an image being displayed is rewritten, and an image being displayed can be retained even when power supply is cut off. Various conventionally known non-volatile display elements can be used as the display panel 22. For example, a non-volatile display element such as a microcapsule method or an electrophoretic method can be used.

  The electronic device 1 includes a plurality of selection buttons 15 arranged in the vertical direction on the right side of the display panel 22. The selection button 15 is used when selecting one of the selection menus displayed on the left side of the selection button 15 in the display panel 22. For example, in the present embodiment, a display mode for displaying the end time information on the display panel 22 is selected via the selection button 15 (details will be described later).

  The electronic device 1 includes a power switch 33, a setting button 13, and an operation button 14 on the right side of the selection button 15. From the top, the power switch 33, the setting button 13, and the operation button 14 are arranged in this order. The power switch 33 is pressed by the user when the power of the electronic device 1 is switched on / off. The setting button 13 and the operation button 14 are pressed by the user when setting or operating the display data displayed on the display panel 22.

  The electronic device 1 includes a rechargeable battery (hereinafter simply referred to as “battery”) 31 (see FIG. 2). The electronic device 1 operates using the battery 31 as a power source. The battery 31 is not particularly limited as long as it is a rechargeable battery, and a conventionally known rechargeable battery can be used. For example, a lithium ion battery or a nickel metal hydride battery can be used.

  The electronic device 1 includes a USB connector 19 to which a USB (Universal Serial Bus) cable 16 is connected. The electronic device 1 is connected to a PC or the like via the USB cable 16. Data communication can be performed between the electronic device 1 and the PC or the like in a state where the electronic device 1 is connected to the PC via the USB cable 16. In addition, when the electronic device 1 is connected to a PC or the like via the USB cable 16, the battery 31 is charged via the Vbus terminal of the USB cable 16.

  The electronic device 1 includes a DC connector 20 to which an AC adapter 17 is connected and a DC power is supplied. The battery 31 is charged when the electronic device 1 is connected to a commercial power supply via the AC adapter 17.

  The electrical configuration of the electronic device 1 will be described with reference to FIG. The electronic device 1 includes a CPU 21, a ROM 24, and a RAM 25. The CPU 21 manages display control of the display panel 22 and the like. The ROM 24 stores programs, initial parameters, and the like. The RAM 25 stores information such as counters, timers, and flags. The CPU 21 is electrically connected to the ROM 24. The CPU 21 is electrically connected to the RAM 25. The CPU 21 can access storage areas of the ROM 24 and the RAM 25.

  The electronic device 1 includes a memory card slot 26. A memory card 35 is inserted into the memory card slot 26. The memory card 35 includes at least a display data storage area 351. Display data to be displayed on the display panel 22 is stored in the display data storage area 351. The CPU 21 is electrically connected to the memory card 35 via the memory card slot 26. The CPU 21 can access the storage area of the memory card 35.

  The electronic device 1 includes an EEPROM 27. The EEPROM 27 includes at least a display table storage area 271, a history information storage area 272, and other information storage areas 273. A display table is stored in the display table storage area 271. History information is stored in the history information storage area 272. Details of the display table and history information will be described later. The CPU 21 is electrically connected to the EEPROM 27. The CPU 21 can access the storage area of the EEPROM 27.

  The electronic device 1 includes a display panel 22 and a display control unit 23. The display control unit 23 performs drive control of the display panel 22. The CPU 21 is electrically connected to the display control unit 23. The display control unit 23 is connected to the display panel 22. The CPU 21 can display a desired image on the display panel 22 via the display control unit 23.

  The electronic device 1 includes a power switch 33. The CPU 21 is electrically connected to the power switch 33. The CPU 21 can detect that the power switch 33 has been pressed by the user. The electronic device 1 includes a selection button 15, a setting button 13, and an operation button 14 (hereinafter collectively referred to as “input unit 34”). The CPU 21 is electrically connected to the input unit 34. The CPU 21 can detect that the input unit 34 has been operated by the user.

  The electronic device 1 includes a USB connector 19, a DC connector 20, a charge control unit 30, and a battery 31. A USB cable 16 is connected to the USB connector 19. An AC adapter 17 is connected to the DC connector 20. The USB connector 19 and the DC connector 20 are connected to the charge control unit 30. The CPU 21 is connected to the charging control unit 30. The battery 31 is connected to the charge control unit 30.

  The charging control unit 30 performs switching control of supplied current. When a current is supplied to the charging control unit 30 via the USB connector 19 or the DC connector 20, the current is distributed and supplied to both the CPU 21 and the battery 31. In this state, the CPU 21 is driven by the current supplied via the USB connector 19 or the DC connector 20, and the battery 31 is charged. On the other hand, when a current is supplied to the charging control unit 30 via the battery 31, the current is supplied to the CPU 21. In this state, the CPU 21 is driven by the current supplied from the battery 31. Further, the charging control unit 30 can notify the CPU 21 of whether the current is supplied to the charging control unit 30 via the USB connector 19 or the DC connector 20 together with the type of the USB connector 19 or the DC connector 20. In addition, the charging control unit 30 can switch whether or not to supply current to the battery 31 under the control of the CPU 21.

  The electronic device 1 includes a voltage detection circuit 32. The voltage detection circuit 32 detects the voltage of the battery 31. In the voltage detection circuit 32, the voltage of the battery 31 is divided by a resistor or the like. The divided voltage is converted into a digital signal by the A / D converter. The CPU 21 detects the voltage of the battery 31 by detecting the digital signal converted by the A / D converter. The voltage detection circuit 32 is electrically connected to the CPU 21. The battery 31 is connected to the voltage detection circuit 32.

  The characteristics of the battery 31 will be described with reference to FIGS. First, the relationship between the remaining capacity of the battery 31 and the voltage will be described with reference to FIG. The capacity remaining in the battery 31 (hereinafter referred to as “remaining capacity”) and the voltage of the battery 31 show the relationship of the curve 311 in FIG. Based on this relationship, the CPU 21 specifies the remaining capacity from the voltage detected by the voltage detection circuit 32. Specifically, a relational expression representing the relation of the curve 311 (hereinafter referred to as “first relational expression”) is stored in the other information storage area 273 of the EEPROM 27. The CPU 21 specifies the remaining capacity by substituting the voltage of the battery 31 into the first relational expression.

  For example, when the voltage of the battery 31 detected by the voltage detection circuit 32 is 3.5 V, the remaining capacity is specified as 1200 mAh (arrow A in the figure). When the voltage of the battery 31 detected by the voltage detection circuit 32 is 3.25 V, the remaining capacity is specified as 150 mAh (arrow B in the figure).

  Charging characteristics when the battery 31 is charged via the USB cable 16 or the AC adapter 17 will be described with reference to FIG. The capacity charged via the USB cable 16 or the AC adapter 17 and the time required for charging (hereinafter referred to as “charging time”) indicate the relationship between the curve 312 and the curve 313 in FIG. The relationship when charged via the AC adapter 17 corresponds to the curve 312. The relationship when charged via the USB cable 16 corresponds to the curve 313.

  The CPU 21 specifies the necessary charging time based on these relationships. Specifically, a relational expression indicating the relationship of the curve 312 (hereinafter referred to as “second relational expression”) and a relational expression indicating the relationship of the curve 313 (hereinafter referred to as “third relational expression”) are stored in the EEPROM 27. It is stored in other information storage area 273. The CPU 21 specifies the charging time by substituting the remaining capacity or the like into the second relational expression or the third relational expression. When charging via the AC adapter 17, the second relational expression is referred to. When charging via the USB cable 16, the third relational expression is referred to.

  For example, when the remaining capacity is 400 mAh and the capacity to be finally charged is 800 mA, when the battery 31 is charged via the AC adapter 17, the charging time is specified to be about 30 minutes. (Arrow C in the figure). When the battery 31 is charged via the USB cable 16, the charging time is specified to be about 45 minutes (arrow D in the figure).

  A display table 2711 which is an example of a display table stored in the display table storage area 271 will be described with reference to FIG. The display table 2711 stores the display data file name, the number of display data pages, and the number of selections when the user selects display data to be displayed on the display panel 22 in association with each other. When the display data to be displayed on the display panel 22 is selected by the user, the CPU 21 updates the information on the number of times of selection corresponding to the selected display data in the display table 2711 by one. The display data itself indicated by the file name is stored in the display data storage area 351 of the memory card 35. In the example shown in FIG. 5, “102 pages” is stored as the number of pages of display data whose file name is “AAA.doc”, and “5 times” is stored as the number of selections. “35 pages” is stored as the number of pages of display data whose file name is “BBB.doc”, and “8 times” is stored as the number of selections.

  History information 2721, which is an example of history information stored in the history information storage area 272, will be described with reference to FIG. The history information 2721 stores date / time information indicating the date / time and the number of times of rewriting when the display data being displayed on the display panel 22 is rewritten to the corresponding date / time. When the display data being displayed on the display panel 22 is rewritten, the CPU 21 adds 1 to the number of times information in the history information 2721 and updates it. In the example illustrated in FIG. 6, “50 times” is stored as the number of rewrites executed on “2009 July 7th”. “200 times” is stored as the number of rewrites executed on “July 6, 2009”.

  Display processing executed in the CPU 21 will be described with reference to the flowcharts of FIGS. 7 and 8. The display process is repeatedly activated and executed by the CPU 21 at a predetermined cycle (for example, 1 s).

  In the present embodiment, it is assumed that any one of the display data stored in the display data storage area 351 is selected by the user via the selection button 15 in advance. Information on the selected display data is stored in the other information storage area 273 of the EEPROM 27.

  In the present embodiment, the display mode for displaying information on the time when charging ends (hereinafter referred to as “end time information”) on the display panel 22 is selected in advance by the user via the selection button 15. Suppose that The display mode includes (1) a mode in which end time information is displayed based on the average number of rewrites per day in the past (first mode), and (2) an end based on the maximum number of rewrites per day in the past. Mode in which time information is displayed (second mode), (3) Mode in which end time information is displayed based on the number of rewrites executed on the previous day (third mode), (4) Pre-selected display data page A mode in which end time information based on the number is displayed (fourth mode), (5) a mode in which end time information is displayed based on the page number of the display data having the largest number of times selected by the user (fifth mode), (6) Mode (sixth mode) in which end time information is displayed based on the number of pages of display data that is within the fifth in the descending order of the number of times selected by the user, (7) User Therefore there is a mode (Seventh Mode) end time information selected number is based on the number of pages of more display data from the preset number is displayed. The end time information is displayed on the display panel 22 when charging of the battery 31 is started. The end time information is information indicating how long it is necessary to charge the electronic device 1 in order to cause the electronic device 1 to execute a predetermined operation for rewriting the display for the number of times specified in each display mode or the number of pages. Information on the display mode selected by the user is stored in the other information storage area 273 of the EEPROM 27.

  As shown in FIG. 7, when the display process is started, first, it is determined whether the USB cable 16 or the AC adapter 17 is connected to the USB connector 19 or the DC connector 20 and charging of the battery 31 is started (S11). . When there is no notification from the charge control unit 30 and charging of the battery 31 has not started (S11: NO), the process returns to S11. Then, the start of charging the battery 31 is continuously monitored.

  On the other hand, when a notification is detected from the charging control unit 30 due to the connection of the USB cable 16 or the AC adapter 17, time information at this time (hereinafter referred to as “start time information”) is stored in the RAM 25. . In this state, the charging control unit 30 is controlled so that current supply to the battery 31 is prohibited. Therefore, charging of the battery 31 has not started. Next, which of the USB cable 16 and the AC adapter 17 is connected is determined by a notification from the charging control unit 30 (S12). Next, processing for determining end time information (end time determination processing) is executed (S13).

  The end time determination process will be described with reference to FIG. In the end time determination process, first, the remaining capacity of the battery 31 is specified (S31). The remaining capacity is specified by substituting the voltage of the battery 31 detected via the voltage detection circuit 32 into the first relational expression stored in the other information storage area 273.

  Next, the number of rewrites is determined based on the display mode stored in the other information storage area 273 (S33). When the display mode is the first mode, the average number of past rewrites per day is calculated as follows. The history information stored in the history information storage area 272 is referred to. The total number of rewrites stored in the history information is calculated. The calculated total is divided by the number of days stored in the history information. The calculated number is determined as the number of rewrites (average number) in the first mode.

  When the display mode is the second mode, the maximum number of rewrites per day in the past is determined as follows. The history information stored in the history information storage area 272 is referred to. The largest number of times of rewriting per day stored as history information is extracted. The extracted number of times is determined as the number of rewrites (maximum number of times) in the second mode.

  When the display mode is the third mode, the number of rewrites executed on the previous day is determined as follows. The history information stored in the history information storage area 272 is referred to. The number of rewrites stored as the previous day's history information is extracted. The extracted number is determined as the number of rewrites in the third mode (the number of rewrites on the previous day).

  When the display mode is the fourth mode, the number of pages of designated display data is determined as the number of rewrites as follows. Display data preselected by the user is specified from information stored in the other information storage area 273. The display table stored in the display table storage area 271 is referred to. The number of pages corresponding to the specified display data file name is extracted. The number of extracted pages is determined as the number of rewrites (number of pages of designated display data) in the fourth mode.

  When the display mode is the fifth mode, the number of pages of display data selected a large number of times is determined as the number of rewrites as follows. The history information stored in the history information storage area 272 is referred to. The number of pages associated with the largest selection count is extracted. The number of extracted pages is determined as the number of rewrites in the fifth mode (the number of pages of display data with a large number of selections). The number of rewrites determined as described above is stored in the RAM 25.

  When the display mode is the sixth mode, the total number of pages of display data that is within the fifth in the descending order of the selected number of times is determined as the number of rewrites as follows. The history information stored in the history information storage area 272 is referred to. The number of pages associated with the fifth or less display data is extracted in descending order of the number of selections. The total number of extracted pages is determined as the number of rewrites in the sixth mode (the number of pages of display data with a large number of selections). The number of rewrites determined as described above is stored in the RAM 25.

  When the display mode is the seventh mode, the total number of pages of display data whose number of selected times is a predetermined number or more is determined as the number of rewrites as follows. The predetermined number of selections determined in advance by the user is specified from the information stored in the other information storage area 273. The history information stored in the history information storage area 272 is referred to. The number of pages associated with display data whose number of selections is a predetermined number or more is extracted. The total number of extracted pages is determined as the number of rewrites in the seventh mode (the number of pages of display data with a large number of selections). The number of rewrites determined as described above is stored in the RAM 25.

  Next, a capacity required for rewriting the display on the display panel 22 by the number of times of rewriting determined in S33 (hereinafter referred to as “target capacity”) is determined (S35). The target capacity is determined on the assumption that rewriting for the number of times of rewriting is executed in one day.

The target capacity is calculated as follows, for example. Assume that the number of rewrites (denoted as N) is determined to be 1000 times in S33. It is assumed that the current consumption during standby in the electronic device 1 (denoted as S1) is 1 mA. It is assumed that the current consumption (represented as S2) when rewriting is performed once is 0.1 mAh. In this case, the target capacity (denoted as M) is calculated as 124 mAh by the following equation.
M (mAh) = S1 (mA) x 24 (h) + S2 (mAh) x N (times) = 1 x 24 + 0.1 x 1000 = 124 (mAh)

  In the present embodiment, it is determined on the assumption that rewriting for the number of times of rewriting is executed in one day, but the present invention is not limited to this method. The target capacity may be determined on the assumption that rewriting for the number of times of rewriting is executed for two days or more.

  Next, the charging time is determined from the remaining capacity specified in S31 and the target capacity determined in S35 (S37). The charging time is specified by substituting the remaining capacity and the target capacity into the second relational expression or the third relational expression stored in the other information storage area 273. When the AC adapter 17 is connected, the second relational expression is referred to. When the USB cable 16 is connected, the third relational expression is referred to.

  Next, end time information is determined based on the charging time determined in S37 (S39). The end time information is calculated by adding the charge time determined in S37 to the start time specified by the start time information stored in the RAM 25 when the charge start is detected (S11, see FIG. 7). Is done. For example, when the start time is “11:00” and the charging time is “12 minutes”, the end time information is “11:12”. Then, the end time determination process ends, and the process returns to the display process (see FIG. 7).

  After the end time information is determined in the end time determination process, the determined end time information is displayed on the display panel 22 as shown in FIG. 7 (S15). Next, the charging control unit 30 is controlled, and current supply to the battery 31 is started. Charging of the battery 31 is started (S17).

  The manner in which the end time is displayed on the display panel 22 will be described with reference to FIG. As shown in FIG. 10, when the electronic apparatus 1 is connected to the PC 18 via the USB cable 16, end time information (11:12) when the battery 31 is charged via the USB cable 16 is displayed on the display panel 22. (41 in the figure).

  After charging of the battery 31 is started, it is determined whether or not the number of rewrites determined in S13 and stored in the RAM 25 has changed (S19). As a case where the number of rewrites is changed, for example, the user may perform an input operation to change the display mode. Further, for example, there is a case where the display mode is the fourth mode and the user performs an input operation for changing the designation of display data via the input unit 34.

  If the number of rewrites has changed (S19: YES), the end time information needs to be determined again based on the number of rewrites after the change and displayed again on the display panel 22. Therefore, the charging controller 30 is controlled to stop charging the battery 31 (S21). Then, the process returns to S13, and the above-described processing is repeatedly executed to determine the end time again based on the number of rewrites after the change.

  On the other hand, if there is no change in the number of rewrites (S19: NO), the current time information is compared with the end time information (S23). If the current time is still before the end time (S23: NO), the capacity of the battery 31 has not reached the target capacity, and charging to the battery 31 has not ended. In this case, the process returns to S19, and the above-described processing is repeatedly executed. On the other hand, if the current time and the end time match (S23: YES), the capacity of the battery 31 has reached the target capacity, and the electronic device 1 can rewrite the display for the determined number of rewrites. is there. In this case, the display panel 22 displays that the capacity of the battery 31 has reached the target capacity (such as “required minimum charge has been completed”), and notifies the user (S25). Then, the display process ends.

  As described above, the user selects a desired operation (an operation for rewriting the display for a desired number of rewrites) by selecting a display mode. The electronic device 1 calculates the capacity of the battery 31 necessary for executing the process of rewriting the display for the number of rewrite times specified by the selected display mode, and notifies the user of the end time information. The user can recognize from the end time information how long it is necessary to charge in order to execute the operation of rewriting the display for the number of times of rewriting according to the display mode. The user can recognize how long it is necessary to charge in order to cause the electronic device 1 to perform a desired operation (display rewriting).

  When the first mode is selected, the capacity required for rewriting the display for the average number of times per day in the past is calculated, and end time information is determined. The user can recognize how much charging should be performed in order to use the electronic device 1 with an average operation frequency. When the second mode is selected, the capacity required to rewrite the display for the past maximum number of rewrites per day is calculated, and end time information is determined. The user can recognize how much charging should be performed in order to use the electronic device 1 in a situation where the operation frequency is high. When the third mode is selected, the capacity necessary for rewriting the display for the number of rewrites of the previous day is calculated, and the end time information is determined. The user can recognize how much charging should be performed in order to use the electronic device 1 at the same frequency as the operation frequency executed on the previous day. When the fourth mode is selected, a capacity necessary for rewriting the display for the number of pages of the designated display data is calculated, and end time information is determined. The user can recognize how much charging should be performed in order to view all desired display data on the electronic device 1. When the fifth mode is selected, the capacity necessary for rewriting the display for the number of pages of the display data having the highest selection frequency is calculated, and the end time information is determined. The user can recognize how much charging should be performed in order to view all the display data with the highest selection frequency on the electronic device 1. When the sixth mode is selected, the capacity required to rewrite the display for the number of pages of display data having a relatively high selection frequency is calculated, and end time information is determined. The user can recognize how much charging should be performed in order to view all display data with a relatively high selection frequency on the electronic device 1. When the seventh mode is selected, a capacity necessary for rewriting the display for the number of pages of display data whose selection frequency is a predetermined number or more is calculated, and end time information is determined. The user can recognize how much charging should be performed in order to view all display data whose selection frequency is a predetermined number of times or more on the electronic device 1.

  The CPU 21 that performs the process of S31 in FIG. 8 corresponds to the “capacity specifying unit” of the present invention, the CPU 21 that performs the process of S35 corresponds to the “first determining unit” of the present invention, and the CPU 21 that performs the process of S37. Corresponds to the “second determining means” of the present invention, and the CPU 21 performing the process of S39 corresponds to the “third determining means” of the present invention. The CPU 21 that performs the process of S15 in FIG. 7 corresponds to the “notification unit” of the present invention. The display panel 22 of FIG. 1 corresponds to “display means” of the present invention. The EEPROM 27 of FIG. 2 provided with the history information storage area 272 corresponds to the “first storage means” and “second storage means” of the present invention. The EEPROM 27 of FIG. 2 provided with the display table storage area 271 corresponds to the “third storage means” of the present invention. The CPU 21 that performs the process of S11 in FIG. 7 corresponds to the “start detection means” of the present invention. When the display mode is the first mode, the CPU 21 that performs the process of determining the average number in S33 of FIG. 8 corresponds to the “average determining means” of the present invention. When the display mode is the second mode, the CPU 21 that performs the process of determining the maximum number of times in S33 of FIG. 8 corresponds to the “maximum determining means” of the present invention.

  In addition, this invention is not limited to the said embodiment, A various change is possible. In the above-described embodiment, when the AC adapter 17 is connected, the second relational expression is referred to, and the end time information when charging is performed via the AC adapter 17 is determined. When the USB cable 16 is connected, the third relational expression is referred to, and end time information when the battery is charged via the USB cable 16 is calculated. However, the present invention is not limited to this method. For example, when the USB cable 16 is connected, both end time information when charging via the USB cable 16 and end time information when charging via the AC adapter 17 are calculated. Also good. Then, both end times may be displayed on the display panel 22.

  Specifically, in S37 of FIG. 8, the charging time when charging is performed via the USB cable 16 (USB charging time) and the charging time when charging is performed via the AC adapter 17 (AC Charging time). In S39, end time information is determined based on the USB charging time, and end time information is determined based on the AC charging time. Both the determined end time information is displayed on the display panel 22 in S15 of FIG.

  Generally, when the battery 31 is charged via the USB cable 16, the charging time is longer than when the battery 31 is charged via the AC adapter 17. Therefore, when the battery 31 is charged via the USB cable 16, the end time information when the battery 31 is charged via the AC adapter 17 is displayed, so that when the battery 31 is charged via the AC adapter 17 The user can be notified whether charging can be terminated at the end time. The user can charge the battery 31 by switching to the AC adapter 17 as necessary.

  Further, for example, when the AC adapter 17 is connected, the end time information when charging via the USB cable 16 may be calculated together with the end time information when charging via the AC adapter 17. . Then, both end time information may be displayed on the display panel 22.

  In the above-described embodiment, a non-volatile display element is used as the display panel 22. However, the present invention is not limited to this configuration, and various conventionally known display elements can be used as the display panel 22. . For example, an LCD or an organic EL display can be used.

  In the above-described embodiment, the end time information is calculated based on the charge start time information and displayed on the display panel 22. However, the present invention is not limited to this method. The charging time calculated in S37 (see FIG. 8) may be displayed on the display panel 22 to notify the user of the time required to complete the charging. Thereby, for example, even when charging is not started, it is possible to notify the user of the charging time required to cause the electronic device 1 to perform the operation of rewriting the display for a desired number of rewriting times. Further, the remaining time required for charging may be displayed on the display panel 22. For example, characters such as “remaining XX minutes” may be displayed on the display panel 22. Thus, it is possible to notify the user of how much time is required until the charging is completed.

  In the above-described embodiment, by selecting the display mode, the user selects a desired operation (an operation for rewriting the display for a desired number of rewrites). The electronic device 1 calculates the capacity of the battery 31 necessary for executing the process of rewriting the display for the number of rewrite times specified by the selected display mode, and notifies the user of the end time information. However, the present invention is not limited to this configuration. For example, the user may directly input the number of rewrites into the electronic device 1. The electronic device 1 may determine the end time information by calculating the capacity of the battery 31 necessary for executing the process of rewriting the display for the input number of rewrite times, and may notify the user.

  In the above-described embodiment, when the display mode is the first mode, the average number of times per day is calculated as the number of rewrites. However, the present invention is not limited to this method. The average number of times may be the average number of times per two days. Similarly, when the display mode is the second mode, the maximum number may not be the maximum number per day. It may be the maximum number of times per day.

  In the above-described embodiment, when the display mode is the sixth mode, the total number of pages of display data that is within the fifth in the descending order of the selected number is determined as the number of rewrites. However, the present invention is not limited to this configuration. For example, the average of the number of pages of display data that is within the fifth in the descending order of the selected number may be calculated and determined as the number of rewrites. In addition, when the display mode is the sixth mode, the total number of pages of display data whose number of selections is equal to or more than a predetermined number is determined as the number of rewrites. However, the present invention is not limited to this configuration. For example, the average number of pages of display data that is selected a predetermined number of times or more may be calculated and determined as the number of rewrites.

1 Electronic device 16 USB cable 17 AC adapter 21 CPU
22 Display panel 31 Battery 34 Input unit 35 Memory card 27 EEPROM
271 Display table storage area 272 History information storage area

Claims (14)

An electronic device that operates using a rechargeable battery as a power source,
Capacity specifying means for specifying a remaining capacity which is a capacity remaining in the rechargeable battery;
First determining means for determining a target capacity that is a capacity of the rechargeable battery required when the electronic device performs a predetermined operation;
When charging the rechargeable battery from the target capacity determined by the first determining means and the remaining capacity specified by the capacity specifying means until the capacity of the rechargeable battery reaches the target capacity A second determining means for determining a charging time which is a required time;
Third determining means for determining end time information indicating a time when charging of the rechargeable battery to the target capacity is completed based on the charging time determined by the second determining means;
An electronic device comprising: notification means for notifying a user of the end time information determined by the third determination means. Non-volatile display means that requires power only when rewriting an image being displayed and can retain the image even when power supply is cut off,
The first determining means includes
The target capacity is determined based on the number of times of rewriting when rewriting the image being displayed on the display means as the predetermined operation, and the capacity per time necessary for rewriting,
The notification means includes
The electronic device according to claim 1, wherein the user is notified by displaying the end time information on the display unit. First storage means for storing the number of times the image has been rewritten;
Average determining means for determining an average number of times of rewriting performed within a predetermined period based on the number of times stored in the first storage means;
The first determining means includes
3. The electronic device according to claim 2, wherein the target capacity required when the operation of rewriting the image for the average number of times determined by the average determination unit is performed as the predetermined operation is determined. . First storage means for storing the number of times the image has been rewritten;
Maximum determining means for determining a maximum number of times that is the maximum of the cumulative number of times for each predetermined period based on the number of times stored in the first storage means;
The first determining means includes
3. The electronic apparatus according to claim 2, wherein the target capacity required when the operation of rewriting the image for the maximum number of times determined by the maximum determining unit is performed as the predetermined operation. . Second storage means for storing the number of times the image has been rewritten the previous day;
The first determining means includes
3. The electronic device according to claim 2, wherein the target capacity required when the operation of rewriting the image for the number of times stored in the second storage unit is performed as the predetermined operation is determined. machine. A third storage means for storing display data information for specifying display data, which is data of the image to be displayed on the display means, and a page number of the display data in association with each other;
The first determining means includes
An operation of extracting the number of pages associated with predetermined display data information from the display data information stored in the third storage unit and rewriting the image for the extracted number of pages. The electronic device according to claim 2, wherein the target capacity necessary for performing the predetermined operation is determined. The first determining means includes
Necessary for performing, as the predetermined operation, display data information designated by the user as the predetermined display data information, and rewriting the image for the number of pages associated with the predetermined display data information. The electronic device according to claim 6, wherein the target capacity is determined. In the third storage means,
The number of times of selection when the user selects the display data to be displayed on the display means is stored in association with the display data information and the page number of the selected display data,
The first determining means includes
The display data information associated with the largest selection number among the selection times stored in the third storage means is the predetermined display data information, and the page associated with the predetermined display data information The electronic apparatus according to claim 2, wherein the target capacity necessary to perform an operation of rewriting the image for several minutes as the predetermined operation is determined. In the third storage means,
The number of times of selection when the user selects the display data to be displayed on the display means is stored in association with the display data information and the page number of the selected display data,
The first determining means includes
A predetermined number is extracted from the selection count stored in the third storage means in descending order of the selection count, and the display data information associated with the extracted selection count is set as the predetermined display data information. 3. The target capacity required to perform an operation of rewriting the image for the number of pages associated with the predetermined display data information as the predetermined operation is determined according to claim 2. The electronic device described. In the third storage means,
The number of times of selection when the user selects the display data to be displayed on the display means is stored in association with the display data information and the page number of the selected display data,
The first determining means includes
Display data information associated with a number of selections equal to or greater than a predetermined number among the number of selections stored in the third storage means is defined as the predetermined display data information, and is associated with the predetermined display data information. The electronic apparatus according to claim 2, wherein the target capacity necessary to perform an operation of rewriting the image for the number of pages as the predetermined operation is determined. The first determining means includes
When the display data information designated by the user is changed in a state where the display means displays the end time information, the display data information after the change is set as the predetermined display data information, and the predetermined data Determining the target capacity required to perform the operation of rewriting the image for the number of pages associated with the display data information as the predetermined operation,
The third determining means includes
In the first determining means, when the target capacity is determined based on the display data information after the change, the end time information is determined based on the newly determined target capacity,
The notification means includes
8. The electronic apparatus according to claim 7, wherein the end time information determined by the third determination unit based on the new target capacity is notified to a user. A method determining means for determining whether the rechargeable battery is charged via an AC adapter or a USB;
In the case where the method determining means determines that the rechargeable battery is charged via the USB,
The second determining means includes
USB charging time, which is the charging time when the rechargeable battery is charged via the USB, and AC charging, which is the charging time when the rechargeable battery is charged via the AC adapter Determine time and
The third determining means includes
Determining USB end time information, which is the end time information based on the USB charging time, and AC end time information, which is the end time information based on the AC charging time;
The notification means includes
12. The electronic apparatus according to claim 1, wherein the USB end time information and the AC end time information determined by the third determining unit are notified to a user. The third determining means includes
Determining end time information indicating a time at which charging to the target capacity is completed;
The notification means includes
13. The electronic apparatus according to claim 1, wherein the end time information determined by the third determining unit is notified to a user. Comprising start detection means for detecting the start of an operation for charging the rechargeable battery;
The first determining means includes
When the operation is detected by the start detection means, the target capacity is determined,
The third determining means includes
The electronic device according to claim 13, wherein the end time information is determined based on start time information indicating a time when the operation is detected by the start detection unit.

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