JP2005151638A - Portable electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable electronic apparatus which can be charged by a charge means within itself in case that it reads a radio tag having stored the information of a battery and that it is recognized that the battery is a secondary battery. <P>SOLUTION: A data reader 20 reads the information including the kind of a battery ( a primary battery, a secondary battery, etc. ) stored in the radio tag 32. The battery 16 is equipped with the radio tag 32. CPU22 recognizes the information (the kind of the primary battery, the secondary battery, or the like) about the battery that it read. The CPU22 controls a battery charger 38 so that the charge of the secondary battery may be performed by a battery charger 38 in case that it is recognized that the battery is a secondary battery. The battery charger 38 charges the secondary battery in question. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a portable electronic device, and more particularly to a portable electronic device that can use a battery as a power source.

  2. Description of the Related Art Conventionally, many portable electronic devices such as digital cameras and mobile phones can be operated with removable batteries because of their portability, and many easily available AA batteries can be used. There are many types of AA batteries, such as a manganese battery as a primary battery, an alkaline battery, a lithium battery, a nickel-cadmium battery as a secondary battery, and a nickel metal hydride battery.

  Since these AA batteries all have the same shape, for example, a digital camera using an AA battery as a power source cannot easily identify the type even if the type of battery is different. For this reason, even when the battery used is a secondary battery, charging is not performed when the battery is attached to the camera.

  On the other hand, recently, it is beginning to carry out product management and the like by mounting a wireless tag storing product information on the product and reading the information of the wireless tag with a reader.

  In Patent Document 1 below, proposals relating to an input / output management ID card and an inventory management system using a wireless tag are made, but the wireless tag is not attached to a battery.

In the following Patent Document 2, an identification part is provided in the battery pack, and only when an identification signal from the dedicated charger is input, the switch part in the battery pack is closed, and a charging circuit is formed with the charger. A configuration other than the dedicated charger realizes a configuration in which the battery pack cannot be charged, and prevents the battery pack from being easily charged from other than the dedicated charger. However, when the battery level of the secondary battery of the camera is low and the battery is charged, the battery is taken out from the camera and charged by the charger, so it is necessary to carry a charger or a spare battery.
JP 2000-22578 A Japanese Patent Laid-Open No. 5-135804

  In consideration of the above facts, the present invention is expected to be equipped with a wireless tag storing information on the battery in the future. It is an object of the present invention to provide a portable electronic device that can be charged by a charging means in a camera body when the battery is recognized to be a secondary battery using the wireless tag even when used. To do.

The present invention of claim 1 is a portable electronic device that houses a battery and can use the battery as a power source,
A reading means for reading information including a battery type stored in a wireless tag mounted on the battery;
Recognition means for recognizing information about the battery read by the reading means;
Charging means for charging the secondary battery when the battery is a secondary battery;
A portable electronic device comprising: charge control means for controlling the charging means so that the charging means performs charging of the secondary battery when the recognizing means recognizes that the battery is a secondary battery; Consists of.

  According to the first aspect of the present invention, the reading means reads information including the battery type (primary battery, secondary battery, etc.) stored in the wireless tag. The battery is equipped with a wireless tag attached or embedded. The recognizing unit recognizes information about the battery read by the reading unit. The battery information includes the type of battery such as a primary battery and a secondary battery, the name of the battery manufacturer, and the like. When the recognizing means recognizes that the battery is a secondary battery, the charging control means controls the charging means so that the secondary battery is charged by the charging means. Charge the secondary battery.

  According to the second aspect of the present invention, the information about the battery stored in the wireless tag includes information on the type of the secondary battery and the manufacturer of the secondary battery. Depending on the type of battery and the manufacturer recognized by the recognition unit, The said charge control means consists of the portable electronic device of Claim 1 which optimizes the charging voltage and charging time of the said charging means.

  According to the present invention of claim 2, since the characteristics of the battery vary depending on the type of the secondary battery and the manufacturer of the secondary battery, the charging control means controls the charging means so as to perform charging according to the characteristics.

  According to a third aspect of the present invention, the portable electronic device has voltage measuring means for measuring a battery voltage, and terminates the operation of the portable electronic device when a voltage value measured by the voltage measuring means becomes a predetermined value or less. The portable electronic device according to claim 1, wherein the charging control means controls the charging means so that the secondary battery is charged when a DC voltage is applied thereafter.

  According to the third aspect of the present invention, when the battery voltage value becomes equal to or lower than the predetermined value, the operation of the portable electronic device is terminated, and then the charging operation is performed.

  According to a fourth aspect of the present invention, the portable electronic device has discharge means for discharging electricity of the battery, and also has discharge control means for controlling the secondary battery to be discharged by the discharge means, and the wireless tag The information about the battery stored in the battery includes information about the type of the secondary battery. When the recognition means recognizes that the battery is a secondary battery having a memory effect, the charge control means The portable electronic device according to claim 1, wherein the discharge control means controls the discharge means so that the secondary battery is discharged by the discharge means before the charge control of the secondary battery is performed.

  According to the present invention of claim 4, in the case of a battery having a memory effect (a phenomenon in which the battery capacity is reduced when additional charging is performed when the battery is not completely discharged), the battery must be discharged before charging. I did it.

  According to a fifth aspect of the present invention, the portable electronic device has discharge means for discharging electricity of the battery, and also has discharge control means for controlling the discharge means so that the secondary battery is discharged by the discharge means. The information about the battery stored in the wireless tag includes information on the type of the secondary battery and the date of the last use of the used secondary battery, and the battery has a tendency to be inactivated by the recognition means. When it is recognized that the battery is a secondary battery of the type, the charge control means recharges the secondary battery by the charge control means when the last use date is compared with the date of use and the period between them is longer than a predetermined period. The portable electronic device according to claim 1, wherein the discharge control unit controls the discharge unit so that the secondary battery is discharged by the discharge unit before the charge control of the battery is performed.

  According to the present invention of claim 5, some types of batteries tend to be inactivated (a phenomenon in which a portion that is not charged even after charging remains and the battery capacity is reduced). So, record the information on the date of last use in advance on the wireless tag of the battery, compare the date with the date when using it, and if it is judged to be left for a long time, be sure to discharge before charging, Do not reduce the battery capacity.

  According to the first aspect of the present invention, when the battery is a secondary battery, the battery can be charged with a DC voltage application adapter while the battery is housed in a portable electronic device, so a charger is brought separately. It is not necessary and easy to carry.

  According to the second aspect of the present invention, optimal charging according to the type of the secondary battery and the manufacturer of the secondary battery is possible, so that the charging speed is also increased.

  According to the third aspect of the present invention, when the remaining amount of the battery is low, the operation of the portable electronic device is terminated, and then the charging operation is performed, thereby enabling the subsequent operation. Can do.

  According to the present invention of claims 4 and 5, the battery capacity can be prevented from being reduced.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of a digital camera functioning as a portable electronic device according to the invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram of the digital camera 2.

  The camera 2 is a digital camera having image recording and playback functions, and the overall operation of the camera 2 is controlled by a central processing unit (CPU) 22. The CPU 22 functions as a control unit that controls the camera system according to a predetermined program, instructs a warning display or a power-off process based on the detected battery voltage, or detects a battery detected when the battery is a secondary battery. Control of charging and discharging of the battery is performed based on the voltage, or the type of secondary battery is determined to calculate the inactivation determination setting days described later.

  The ROM 7 connected to the CPU 22 via the bus 35 stores programs executed by the CPU 22, various data necessary for control, and the like. Note that the ROM 7 as the nonvolatile storage means may be non-rewritable, or may be rewritable like an EEPROM.

  The storage unit 8 is used as a program development area and a calculation work area for the CPU 22, and is also used as a temporary storage area for image data and audio data.

  The camera 2 is provided with operation buttons 30 such as a mode selection switch, a shooting button, a menu / OK key, a cross key, and a cancel key. Signals from these various operation buttons 30 are input to the CPU 22, and the CPU 22 controls each circuit of the camera 2 based on the input signals. For example, lens drive control, shooting operation control, image processing control, image data recording / recording Playback control, display control of the display unit 26 via the display control unit 24, control of the strobe 34 via the strobe control unit 36, and the like are performed.

  The mode selection switch is an operation means for switching between a still image shooting mode, a moving image shooting mode, and a playback mode.

  The shooting button is an operation button for inputting an instruction to start shooting, and functions as a recording start (start) / stop (stop) button in moving image shooting, and functions as a release button in still image shooting. The photographing button is composed of a two-stroke switch having an S1 switch that is turned on when half-pressed and an S2 switch that is turned on when fully pressed.

  The menu / OK key is an operation key having both a function as a menu button for instructing to display a menu on the screen of the display unit 26 and a function as an OK button for instructing confirmation and execution of selection contents. It is.

  The cross key is an operation unit for inputting instructions in four directions, up, down, left, and right, and functions as a button (cursor moving operation means) for selecting an item from the menu screen or instructing selection of various setting items from each menu. To do. The up / down key of the cross key functions as a zoom switch at the time of shooting or a playback zoom switch at the time of playback, and the left / right key functions as a frame advance (forward / reverse feed) button in the playback mode.

  The cancel key is used when deleting a desired item such as a selection item, canceling an instruction content, or returning to the previous operation state.

  A signal from the power switch 28 is also input to the CPU 22.

  The display unit 26 is configured by a liquid crystal display capable of color display. The display unit 26 can be used as an electronic viewfinder for checking the angle of view at the time of shooting, and is used as a means for reproducing and displaying a recorded image. The display unit 26 is also used as a display screen for a user interface, and displays information such as menu information, selection items, setting contents, battery remaining voltage warning, charging, and discharging as necessary. Instead of the liquid crystal display, other types of display devices (display means) such as an organic EL can be used.

  The display control unit 24 performs a predetermined operation for displaying the display contents on the display unit 26 based on a command from the CPU 22. The display unit 26 becomes visible when the backlight 40 disposed inside the display unit 26 is turned on. The backlight 40 is turned on and the brightness is controlled by the backlight control unit 42 based on a command from the CPU 22.

  The digital camera 2 includes a recording unit 14 having a media socket (media mounting unit) and a media controller, and a recording medium can be mounted on the media socket. The form of the recording medium is not particularly limited, and various media such as a semiconductor memory card represented by xD-PictureCard (registered trademark) and smart media (registered trademark), a portable small hard disk, a magnetic disk, an optical disk, and a magneto-optical disk Can be used. The media controller performs necessary signal conversion in order to transfer input / output signals suitable for the recording media loaded in the media socket.

  A photographing function of the digital camera 2 will be described.

  When the still image shooting mode or the moving image shooting mode is selected by the mode selection switch, power is supplied to the imaging unit 4 including a CCD solid-state imaging device (hereinafter referred to as “CCD”), and the camera is ready for shooting.

  The imaging unit 4 includes a lens unit, and the lens unit is an optical unit including a photographing lens including a focus lens and a mechanical shutter serving as an aperture. The lens unit is electrically driven by a lens driving unit and a diaphragm driving unit that are controlled by the CPU 22, and zoom control, focus control, and iris control are performed.

  The light that has passed through the lens unit forms an image on the light receiving surface of the CCD. A number of photodiodes (light receiving elements) are two-dimensionally arranged on the light receiving surface of the CCD, and red (R), green (G), and blue (B) primary color filters corresponding to the photodiodes. They are arranged in a predetermined arrangement structure (Bayer, G stripe, etc.). The CCD has an electronic shutter function for controlling the charge accumulation time (shutter speed) of each photodiode. The CPU 22 controls the charge accumulation time in the CCD via a timing generator (not shown). Note that another type of image sensor such as a MOS type may be used instead of the CCD.

  The subject image formed on the light receiving surface of the CCD is converted into a signal charge of an amount corresponding to the amount of incident light by each photodiode. The signal charge accumulated in each photodiode is sequentially read out as a voltage signal (image signal) corresponding to the signal charge based on a drive pulse given from the timing generator in accordance with a command from the CPU 22.

  The signal output from the CCD is amplified by sampling and holding (correlated double sampling processing) R, G, and B signals for each pixel. Thereafter, the R, G, and B signals that are sequentially input are converted into digital signals and output to the signal processing unit 6.

  The signal processing unit 6 processes a digital image signal input via an image input controller (not shown) according to a command from the CPU 22. That is, the signal processing unit 6 includes a synchronization circuit (a processing circuit that converts a color signal into a simultaneous expression by interpolating a spatial shift of the color signal associated with the color filter array of the single CCD), and a luminance / color difference signal generation circuit. , Functions as image processing means including a gamma correction circuit, contour correction circuit, white balance correction circuit, etc., and performs predetermined signal processing using the storage unit 8 in accordance with commands from the CPU 22.

  Note that the image input controller includes a memory controller that performs data read control and write control of the storage unit 8.

  The RGB image data input to the signal processing unit 6 is converted into a luminance signal (Y signal) and a color difference signal (Cr, Cb signal) by the signal processing unit 6 and subjected to predetermined processing such as gamma correction. The The image data processed by the signal processing unit 6 is stored in the storage unit 8.

  When the captured image is output to the display unit 26 on the monitor, the image data is read from the storage unit 8 and sent to the display control unit 24 via the bus 35. The display control unit 24 converts the input image data into a predetermined display signal (for example, an NTSC color composite video signal) and outputs the converted signal to the display unit 26. When the captured image is output to the display unit 26 on the monitor, the backlight 40 is lit in conjunction. The backlight 40 is lit while shooting. The backlight 40 is lit during playback, but is turned off to save power if there is no key operation for a certain period of time during playback.

  In response to the operation of the power switch 28 and the operation button 30, the CPU 22 sends a control signal for controlling the power to the power control unit 12, the power control unit 12 controls the power circuit 10, and the power circuit 10 is necessary for each block. Supply the amount of power.

  As a power source, a DC power source can be used, but a battery is usually used. In the battery 16, as shown in FIG. 6, a chip-shaped wireless tag 32 in which information on the battery is stored is embedded in the center in the longitudinal direction of the battery 16. The information of the battery that the wireless tag 32 has is a primary battery or a secondary battery, and if it is a primary battery, it is a manganese battery, an alkaline battery, or a lithium battery, or if it is a secondary battery, a nickel-cadmium battery, nickel-metal hydride The battery type such as whether it is a battery, the manufacturer name of the battery, the serial number unique to the battery, the last use date of the battery, and the like.

  The wireless tag 32 may be attached in the vicinity of one end of the battery 16 in the longitudinal direction, as shown in FIG. In this case, the data read / write unit 20 is also arranged at a position where the wireless tag 32 can be detected, for example, at two locations.

  The wireless tag 32 is not limited to the chip shape, but may be a band formed around the battery.

  The data read / write unit 20 is disposed at a position where the wireless tag 32 embedded in the battery 16 can be detected when the battery 16 is accommodated in the battery box in the digital camera 2. 32 is detected and the battery information is read. The read information is sent to the CPU 22. The CPU 22 determines the type of battery, manufacturer name, manufacturing number unique to the battery, date of last use of the battery, and the like from the read battery information. Further, the data read / write unit 20 writes the date on which the battery 16 is used in the digital camera 2 to the wireless tag 32 each time it is used.

  The digital camera 2 of this embodiment is configured to accommodate two AA batteries in a battery box with the longitudinal direction reversed. As shown in FIG. 6, the data read / write unit 20 is formed on the inner wall of the battery box, but is disposed at one place in the center in the longitudinal direction and the width direction of the battery box. Thereby, the wireless tag 32 of two batteries can be detected by one data read / write unit 20.

  In this case, the data read / write unit 20 detects the wireless tag 32 of the first battery, and detects the wireless tag 32 of the second battery with a time difference. The CPU 22 simultaneously receives the detected battery information stored in the wireless tag 32 of the first battery and the detected battery information stored in the wireless tag 32 of the second battery.

  The data read / write unit 20 may be formed in a circumferential shape on the inner wall of the central portion in the longitudinal direction of the battery box. In this way, the data read / write unit 20 can easily and reliably detect the wireless tag 32 regardless of where the chip-shaped wireless tag 32 is attached at the center in the longitudinal direction of the battery.

  The battery voltage detector 18 detects the voltage of the battery 16 based on a command from the CPU 22. The detection result of the voltage is sent to the CPU 22, and the CPU 22 generates a predetermined warning display based on the detection result, or generates a signal for turning off the power, discharging the battery, or charging.

  When the battery 16 is a secondary battery, the battery 16 can be charged by operating the battery charging unit 38 based on a command from the CPU 22. In this case, power is separately supplied from a DC power source connected to the digital camera 2.

  When the battery 16 is a secondary battery, the battery 16 can be discharged by operating the battery discharge part 39 based on the instruction | command of CPU22.

  In the digital camera 2, the process of the process by the voltage drop for each primary battery and secondary battery will be described.

  In the present embodiment, the data reading / writing unit 20 of the digital camera 2 detects the wireless tag 32 attached to the battery 16 and reads the battery information, so that the battery type, manufacturer name, serial number unique to the battery, Warning display, power-off processing, charging and discharging are performed according to the last use date of the battery.

  The flow will be described below with reference to FIGS. FIG. 2 to FIG. 4 are flowcharts showing the steps of reading the type of battery, performing warning display, power-off processing, charging, and discharging.

  First, the power switch 28 is turned on (step 50). The data read / write unit 20 detects the wireless tag 32 of the battery 16 and reads battery information stored in the wireless tag 32 (step 52).

  The battery type is determined from the read battery information (step 54). This is because the read battery information is sent to the CPU 22, and the CPU 22 determines the battery type and determines whether the battery currently used is a primary battery or a secondary battery.

  As a result of the determination, in the case of a primary battery, the process proceeds to step 56, and the battery voltage detection unit 18 detects the battery voltage. As a result, it is determined whether or not the voltage value of the primary battery is a pre-end voltage (step 58). The pre-end voltage is a residual voltage value one step before the voltage value at which the digital camera becomes unusable. If the determination in step 58 is negative, the process returns to step 56. If the determination in step 58 is affirmative, a warning display indicating that the remaining battery voltage has decreased is displayed on the LCD monitor 26 serving as a display unit (step 60). FIG. 7 is an example of a battery residual voltage warning display. The display after detection of the pre-end voltage is lit with a pattern as shown in (2).

  Thereafter, the battery voltage detector 18 detects the battery voltage (step 62). As a result, it is determined whether or not the voltage value of the primary battery is an end voltage (step 64). The end voltage is a residual voltage value that becomes a voltage value at which the digital camera becomes unusable. The display after the end voltage is detected blinks as shown in (3) of FIG. If the determination in step 64 is negative, the process returns to step 62. If the determination in step 64 is affirmative, the CPU 22 issues a command to the power supply control unit 12 to perform power supply OFF processing (step 66). Thereafter, the power is turned off (step 68).

  If the result of determination in step 54 is a secondary battery, the process proceeds to step 100. Step 100 is a step of determining and processing the secondary battery type, and details will be described later.

  After step 100, the process proceeds to step 70, where the battery voltage detection unit 18 detects the battery voltage. As a result, it is determined whether or not the voltage value of the secondary battery is a pre-end voltage (step 72). The pre-end voltage here is also a residual voltage value one step before the voltage value at which the digital camera becomes unusable. If the determination in step 72 is negative, the process returns to step 70. If the determination in step 72 is affirmative, a warning display indicating that the remaining battery voltage has decreased is displayed on the LCD monitor 26 serving as a display unit (step 74). The display after detection of the pre-end voltage here is also illuminated with a pattern as shown in (2) of FIG.

  Thereafter, the battery voltage detector 18 detects the battery voltage (step 76). As a result, it is determined whether or not the voltage value of the secondary battery is an end voltage (step 78). The end voltage here is also a residual voltage value at which the digital camera becomes unusable. The display after the end voltage is detected blinks as shown in (3) of FIG. If the determination in step 78 is negative, the process returns to step 76. If the determination in step 78 is affirmative, the CPU 22 issues a command to the power supply control unit 12 to perform power-off processing (step 80). Thereafter, the power is turned off (step 68).

  After step 68, when a DC voltage is applied to the digital camera 2, the data read / write unit 20 of the digital camera 2 detects the wireless tag 32 attached to the battery 16 and reads and obtains battery information (step 82). This is because the read battery information is sent to the CPU 22, and the CPU 22 determines the battery type and determines whether the battery currently used is a primary battery or a secondary battery (step 84).

  If it is determined that the battery is a primary battery, the process is terminated.

  As a result of the determination, in the case of a secondary battery, the battery voltage detector 18 detects the battery voltage (step 86). Since the voltage value of the secondary battery is the end voltage, the CPU 22 issues a charge command to the battery charging unit 38 to charge the secondary battery (step 88). During charging, a display as shown in FIG. 8 appears on the display unit 26 (step 90).

  The battery voltage detector 18 detects the battery voltage (step 91), and determines whether or not the battery voltage has reached the charging completion voltage (step 92). If not, the process returns to step 86. If it has reached, the display during charging is turned off (step 94). Thereafter, the process ends.

  The step of determining and processing the secondary battery type in step 100 will be described.

  If it is determined in step 54 of FIG. 2 that the battery type is a secondary battery, it is further determined in step 102 whether the secondary battery is a nickel metal hydride battery (NiMH) or a nickel cadmium battery (NiCd). These pieces of information are included in the battery type information obtained in step 52.

  In the case of a nickel metal hydride battery (NiMH), the date when the battery was last used is detected (step 104). This information is also included in the battery type information obtained in step 52. It is determined whether the date from the last used date to the present time is equal to or greater than the inactive determination set number of days (step 106). When nickel-metal hydride batteries (NiMH) are left unused for a long period (about 3 to 4 months), an inactivation phenomenon occurs. This is a phenomenon in which even if the battery is charged, a portion that is not charged remains and the battery capacity is reduced. Information on the date of last use is recorded in the battery in advance, and the date is compared with the date of use. If it is determined that the battery has been left for a long time, the battery must be discharged before charging. Thereby, a reduction in battery capacity can be prevented.

  Therefore, when it is determined in step 106 that the number of days of inactivity determination is greater than or equal to, the battery voltage is detected (step 108) and the battery is discharged (step 110). Discharging is performed by issuing a discharge command from the CPU 22 to the battery discharging unit 39. During discharging, a message “battery discharging” appears on the display unit 26 (step 112). Thereafter, the battery voltage is detected (step 113), and it is determined whether the battery has reached the discharge completion voltage (step 114). If not, the process returns to step 108. If the determination is affirmative, the display of “battery discharging” is turned off (step 116), and the process proceeds to step 70 in FIG. If it is determined in step 106 that it is less than the inactive determination days, the process proceeds to step 70.

  If it is determined in step 102 that the battery is a nickel cadmium battery, the process proceeds to steps 108 and 110 to discharge the battery. The NiCad battery has a memory effect (a phenomenon in which the battery capacity is reduced by additional charging when a residual voltage remains to some extent), so it must be discharged before charging. Thereby, a reduction in battery capacity can be prevented.

  When charging, the shortest time according to the characteristics of the battery is achieved by optimizing the charging voltage and charging time according to the type and manufacturer name of the secondary battery based on the information obtained from the wireless tag 32 of the battery. It can also be charged with

  According to this embodiment, when the battery is a secondary battery, the battery can be charged with the adapter for applying DC voltage while the battery is housed in the digital camera, so there is no need to bring a charger separately. Since it can be charged with a DC voltage application adapter that is smaller than the battery, it is easy to carry even when traveling for a long time, and it is not necessary to carry many spare batteries.

  In this embodiment, the subject to which the present invention is applied has been described as a digital camera. However, the present invention can be applied to portable electronic devices other than the digital camera, such as a mobile phone.

The block diagram of a digital camera. The flowchart which showed the process which reads the kind of battery, performs a warning display, a power OFF process, charge, and discharge. FIG. 3 is a continuation of FIG. 2 illustrating a process of reading a battery type, performing a warning display, power-off processing, charging, and discharging. The flowchart which showed the process of discriminating and processing a secondary battery kind. The figure which showed the example which attached the wireless tag to each one end vicinity of the battery arrange | positioned in parallel, and arrange | positioned two data reading / writing parts in the position corresponding to a wireless tag. The figure which showed the example which attached to the center of the longitudinal direction of each battery which has arrange | positioned the radio | wireless tag in parallel, and arrange | positioned one data read / write part in the position corresponding to a radio | wireless tag. The figure of the example of the residual voltage warning display of a battery. The figure of the example of a display during charge.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 2 ... Digital camera, 7 ... ROM, 8 ... Memory | storage part, 10 ... Power supply circuit, 12 ... Power supply control part, 16 ... Battery, 18 ... Battery voltage detection part, 20 ... Data read / write part, 22 ... CPU, 24 ... Display control , 26 ... display part, 28 ... power switch, 32 ... wireless tag, 38 ... battery charging part, 39 ... battery discharging part

Claims (5)

A portable electronic device that houses a battery and can use the battery as a power source,
A reading means for reading information including a battery type stored in a wireless tag mounted on the battery;
Recognition means for recognizing information about the battery read by the reading means;
Charging means for charging the secondary battery when the battery is a secondary battery;
When the recognition means recognizes that the battery is a secondary battery, a portable electronic device comprising: charge control means for controlling the charging means so that the secondary battery is charged by the charging means.   The information about the battery stored in the wireless tag includes information on the type of secondary battery and the manufacturer of the secondary battery. Depending on the type of battery recognized by the recognition unit and the manufacturer, the charge control unit The portable electronic device according to claim 1, wherein the charging voltage and charging time of the means are optimized.   The portable electronic device has a voltage measuring means for measuring a battery voltage, and when the voltage value measured by the voltage measuring means becomes a predetermined value or less, the operation of the portable electronic device is terminated, and then a DC voltage is applied. 2. The portable electronic device according to claim 1, wherein the charging control unit controls the charging unit so that the secondary battery is charged when the charging unit is charged.   The portable electronic device has discharge means for discharging the electricity of the battery, and also has discharge control means for controlling the secondary battery to be discharged by the discharge means, and the battery stored in the wireless tag The information includes information on the type of the secondary battery, and when the recognition unit recognizes that the battery is a secondary battery having a memory effect, before the charge control unit performs charge control of the secondary battery. The portable electronic device according to claim 1, wherein the discharge control unit controls the discharge unit so that the secondary battery is discharged by the discharge unit.   The portable electronic device has discharge means for discharging electricity of the battery, and also has discharge control means for controlling the discharge means so that the secondary battery is discharged by the discharge means, and is stored in the wireless tag. The information on the battery includes information on the type of the secondary battery and the date of the last use of the secondary battery in use, and the battery is a secondary battery of the type having a tendency to be deactivated by the recognition means. If it is recognized, if the period between the last use date and the date of use is longer than a predetermined period, the charge control means before the charge control of the secondary battery is performed. 2. The portable electronic device according to claim 1, wherein the discharge control means controls the discharge means so that the secondary battery is discharged by the discharge means.

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