KR101109589B1 - Apparatus for charging secondary battery in mobile device with both primary cell and secondary cell, and digital camera therewith - Google Patents

Abstract

The present invention relates to a charging device for a portable device combined with a primary battery and a secondary battery, and a digital camera having the same. The charging device for a portable device for both primary and secondary batteries according to the present invention is connected between a primary battery or a secondary battery accommodated in the primary and secondary battery portable devices and a charger connected from the outside. A charging device for selectively charging a secondary battery, comprising: a battery connection terminal portion connected to electrode terminals of a battery housed in a portable device; And a battery connected between the battery connection terminal unit and the charger such that current is not supplied from the charger to the primary battery when the battery stored in the portable device is the primary battery. In the case of a primary battery, a switching means for supplying a current from a charger to the secondary battery, wherein the battery connection terminal portion, the negative terminal connected to the negative electrode of the primary battery or secondary battery, the primary battery or 2 A positive terminal connected to the positive electrode of the secondary battery, and a recognition terminal connected to the electrode for recognition of the secondary battery. According to the present invention, it is possible to selectively charge the secondary battery stored in the primary battery and the portable battery combined with the secondary battery using a mobile phone charger supplied as standardized.

Description

Apparatus for charging secondary battery in mobile device with both primary cell and secondary cell, and digital camera therewith}

1 is a perspective view showing the appearance of a front surface of a digital camera as a portable device according to the present invention.

FIG. 2 is a rear view illustrating an appearance of a rear surface of the digital camera of FIG. 1.

3 is a view showing the overall configuration including a control device of the digital camera of FIG.

4 is a view showing a preferred embodiment according to the present invention, in which a charger for a portable terminal according to the TTA standard is connected to a charging device according to the present invention when a secondary battery is stored in a digital camera.

5 is a view showing a preferred embodiment according to the present invention, in which a charger for a portable terminal according to the TTA standard is connected to a charging device according to the present invention when a primary battery is stored in a digital camera.

6 is a circuit diagram schematically illustrating a rechargeable battery, a charger, and a charging device of FIG. 4.

FIG. 7 is a circuit diagram schematically illustrating the primary battery, the charger, and the charging device of FIG. 5.

8 is a circuit diagram illustrating another embodiment of the present invention, in which a charger is connected to a secondary battery through a charging device.

9 is a circuit diagram illustrating another embodiment of the present invention, in which a charger is connected to a primary battery through a charging device.

10 is a flowchart schematically showing a charging operation by the charging device according to the present invention.

<Explanation of symbols for the main parts of the drawings>

200: charger connection terminal, 250: power circuit,

350: charger, 400, 500: charger,

600: secondary battery, 700: primary battery,

601, 701: cathode, 602: electrode for recognition,

603, 703: positive electrode, 410, 510: battery connection terminal portion,

411, 511: negative terminal, 412, 512: recognition terminal,

413, 513: positive terminal, 420, 520: switching means.

The present invention relates to a charging device for a portable device for a primary battery and a secondary battery and a digital camera including the same, and more particularly, to a portable device for a primary battery and a secondary battery using a mobile phone charger that is standardized and supplied. The present invention relates to a charging device for a primary battery and a secondary battery portable device capable of charging a secondary battery stored therein, and a digital camera having the same.

Recently, various photographing apparatuses such as digital still cameras and digital camcorders have been used as portable devices for capturing images such as still images or moving images. In particular, with the development of the communication network, such as the Internet, digital still cameras are attracting attention with various uses in everyday life.

As an example of a conventional portable device, a digital camera, a control apparatus thereof, and a control method thereof are disclosed in US Patent Application Publication No. 2004/0130650 (name: Method of automatically focusing using a secondary function of a camera). a quadratic function in camera. Matters relating to the digital camera, the control apparatus, and the control method disclosed in the above-mentioned US application will be included in the present specification, the detailed description thereof will be omitted.

The power of a conventional digital camera often uses both a primary battery and a secondary battery for the user's convenience, and the secondary battery charging method is a TTA standard charger used in a mobile phone using only a secondary battery. It did not meet the conditions of use, and has been used after charging the secondary battery externally using a separate charger.

In addition, the charging method of the conventional secondary battery for digital cameras, the charging method, the charger, the adapter, etc. were mainly determined by the product specifications of the digital camera manufacturer, and the product must be purchased to charge. Therefore, there was a time and space constraint that can not be charged other than the manufacturer's charging products.

In order to improve this inconvenience, a battery charger used for a general purpose may be used to charge a battery used in a portable device such as a digital camera using both a universal primary battery or a secondary battery. However, even in this case, since the charger cannot operate by distinguishing the primary battery or the secondary battery stored inside the portable device, an error may occur during charging or operation of the product. There is a problem that the primary battery may be damaged.

The present invention is to solve the above problems, by selecting and charging the secondary battery in a state where the battery is stored in the interior of the portable device that can use both the primary battery and the secondary battery, the inside of the portable device When the battery stored in the primary battery is not charged, the battery stored in the inside of the portable device is a secondary battery, the primary battery and the secondary battery to perform the charging operation by the charging current flows to the secondary battery An object of the present invention is to provide a charging device for a portable battery and a digital camera having the same.

A charging device for a primary battery and a secondary battery portable device according to the present invention for achieving the above object is a primary battery or a secondary battery housed in the primary battery and secondary battery portable device; A charging device for selectively charging a secondary battery connected between a charger connected from the outside, comprising: a battery connection terminal unit connected to electrode terminals of a battery housed in a portable device; And a battery connected between the battery connection terminal unit and the charger such that current is not supplied from the charger to the primary battery when the battery stored in the portable device is the primary battery. In the case of a primary battery, a switching means for supplying a current from a charger to the secondary battery, wherein the battery connection terminal portion, the negative terminal connected to the negative electrode of the primary battery or secondary battery, the primary battery or 2 A positive terminal connected to the positive electrode of the secondary battery, and a recognition terminal connected to the electrode for recognition of the secondary battery.

The battery connection terminal may include a negative terminal connected to a negative electrode of a primary battery or a secondary battery, a positive terminal connected to a positive electrode of a primary battery or a secondary battery, and a recognition terminal connected to an electrode for recognizing a secondary battery. It is preferable to provide.

According to another aspect of the present invention, a digital camera includes a charging device for a portable device of a primary battery and a secondary battery.

According to the present invention, it is possible to selectively charge the secondary battery stored in the primary battery and the portable battery combined with the secondary battery using a mobile phone charger supplied as standardized.

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

1 is a perspective view showing the appearance of a front surface of a digital camera as a portable device according to the present invention.

Referring to the drawings, in front of the digital camera 1 as a portable device according to the present invention, a microphone (MIC), a self-timer lamp (11), a flash (12), a shutter release button (13), There is a view finder 17a, a flash-light sensor 19, a power switch 31, a lens unit 20, and a remote receiver 41. In addition, the charger connection terminal unit 200 is provided, which will be described later.

In the self-timer mode, the self-timer lamp 11 operates for a set time from the time when the shutter release button 13 is pressed to the time at which the image starts to be captured. The flash-light amount sensor 19 detects the light amount when the flash 12 operates and inputs the light amount to the digital camera processor 307 of FIG. 3 through the microcontroller 312 of FIG. 3.

The remote receiver 41 receives an infrared photographing command signal from a remote controller (not shown) and inputs it to the digital camera processor 507 through the microcontroller 512.

The shutter release button 13 has a two-stage structure. That is, after the user operates the wide-angle zoom button 39 _W and the tele-zoom button 39 _T , the S1 signal from the shutter release button 13 is turned on by pressing the shutter release button 13 only one step. And the S2 signal from the shutter release button 13 is turned on when pressed to the second stage.

FIG. 2 is a rear view illustrating an appearance of a rear surface of the digital camera of FIG. 1.

Referring to the drawings, at the rear of the digital camera 1 according to the present invention, a mode dial 14, function buttons 15, manual focusing / deletion button 36, manual adjustment / playback button 37, Playback mode button 42, speaker SP, monitor button 32, auto-focus lamp 33, viewfinder 17b, flash standby lamp 34, color LCD panel 35, wide angle There is a zoom button 39 _W , a telephoto-zoom button 39 _T , and an external interface 21.

The mode dial 14 is a camera's operation modes, for example, a composite shooting mode (14 _ML ), a program shooting mode, a portrait shooting mode, a night view shooting mode, a manual shooting mode, a video shooting mode (14 _MP ), a user setting the mode (14 _MY), and the recording mode (14 _V) is used for the user to select and set.

Here, the composite photographing mode 14 _ML indicates an operation mode in which an input image and any one auxiliary image are synthesized and photographed. The user setting mode 14 _MY indicates an operation mode for setting shooting information required for the still image or moving picture shooting mode by the user. On the other hand, the recording mode (14 _V) is sound, for example, refers to a mode of operation for simply recording only the user's voice.

The function buttons 15 are used by the user to perform specific functions of the digital camera 1 while being used as direction-shift buttons and the like of the activation cursor in the menu screen of the color LCD panel 35.

For example, the user and the macro / down in a still image or a moving picture pick-up mode is close automatic focusing by pressing a shift button (15 _P) is set. In addition, the user menu / selection from the menu, the display form for setting the condition of any one of the operation mode by the OK button (15 _M) in the pressing, the user and the macro / down-pressing the change button (15 _P) activated The cursor moves down.

On the other hand, when the user voice-notes / up-press the navigation button (15 _R), can be recorded for 10 seconds after the subsequent image sensing operation. In addition, the user the menu / selection from the menu, the display form for setting the condition of any one of the operation mode by the OK button (15 _M) in the press, when the user voice-notes / up-shift button (15 _R) Press to move the active cursor up. In addition, the active cursor is user menu / selection in a state located in any one of the selection - Press the OK button (15 _M) the operation corresponding to the selected item is performed.

The manual focusing / deletion button 36 is used to manually focus or delete operation by the user in the shooting mode. The manual-adjustment / playback button 37 is used for the manual adjustment of certain conditions and for functions such as stopping or playing in the playback mode. The playback mode button 42 is used for switching to the playback or preview mode.

The monitor button 32 is used by the user to control the operation of the color LCD panel 35. For example, in the shooting mode, when the user presses the monitor button 32 first, the image of the subject and the shooting information are displayed on the color LCD panel 35, and when the user presses the monitor button 32, power applied to the color LCD panel 35 is pressed. Is blocked. In addition, in the playback mode, when the user presses the monitor button 32 first while a video file is being played back, the shooting information of the video file being played is displayed on the color LCD panel 35, and when pressed second, Only the image is displayed.

The auto-focus lamp 33 operates when the focus is achieved. The flash standby lamp 34 operates when the flash (12 in FIG. 1) is in standby for operation. Mode refers to the selection mode of the indicator lamps (14 _L), a mode dial 14.

3 is a view showing the overall configuration including a control device of the digital camera of FIG. Referring to Figures 1 to 3, the overall configuration and operation of the digital camera 1 of Figure 1 will be described.

The optical system OPS including the lens unit and the filter unit optically processes light from a subject.

The lens unit of the optical system OPS includes a zoom lens, a focus lens, and a compensation lens.

When the user presses the wide angle-zoom button 39 _W or the telephoto-zoom button 39 _T included in the user input unit INP, a corresponding signal is input to the microcontroller 312. . Accordingly, as the microcontroller 312 controls the lens driver 310, the zoom motor M _Z is driven to move the zoom lens. That is, when the wide-angle zoom button 39w is pressed, the focal length of the zoom lens is shortened to widen the angle of view, and when the telephoto-zoom button 39t is pressed, the focus of the zoom lens is pressed. The longer the length, the narrower the angle of view. Here, since the position of the focus lens is adjusted while the position of the zoom lens is set, the angle of view is hardly influenced by the position of the focus lens.

Meanwhile, in the auto focusing mode, the focus motor M _F is driven by the main controller embedded in the digital camera processor 307 controlling the driving unit 310 through the microcontroller 312. As a result, the focus lens is moved, and in this process, the position of the focus lens where the high frequency component of the image signal is the largest, for example, the number of driving steps of the focus motor M _F is set.

The compensating lens of the lens unit of the optical system OPS is not driven separately because it serves to compensate the overall refractive index. Reference numeral M _A denotes a motor for driving an aperture (not shown).

In the filter section of the optical system OPS, an optical low pass filter (OLPF) removes optical noise of high frequency components. Infra-Red cut filters (IRFs) block infrared components of incident light.

A photoelectric conversion unit (OEC) of a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) converts light from an optical system (OPS) into an electrical analog signal. Here, the digital camera processor 307 controls the timing circuit 302 to control the operation of the photoelectric converter OEC and the analog-digital converter 301. The CDS-ADC (Correlation Double Sampler and Analog-to-Digital Converter) element 301 as an analog-to-digital converter processes the analog signal from the photoelectric converter (OEC), removes the high frequency noise, and adjusts the amplitude. After that, it is converted into a digital signal.

The real time clock 303 provides time information to the digital camera processor 307. The digital camera processor 307 processes the digital signal from the CDS-ADC element 301 to generate a digital image signal classified into luminance and chroma signals.

The light-emitting portion LAMP driven by the microcontroller 312 in accordance with control signals from the digital camera processor 307 incorporating the main controller includes a self-timer lamp 11, an auto-focus lamp 33, A mode indication lamp 14 _L and a flash standby lamp 34 are included. The user input unit INP includes a shutter release button 13, a mode dial 14, function buttons 15, a monitor button 32, a manual focusing / delete button 36, a manual adjustment / playback button ( 37), wide-zoom button 39 _W , telephoto-zoom button 39 _T , and the like.

A digital video signal from the digital camera processor 307 is temporarily stored in a DRAM (Dynamic Random Access Memory) 304. The EEPROM (Electrically Erasable and Programmable Read Only Memory) 305 stores algorithms necessary for the operation of the digital camera processor 307. In the memory card interface (MCI) 306, the user's memory card is detached. The flash memory FM stores setting data necessary for the operation of the digital camera processor 307. The setting data includes data of auxiliary images for composite shooting. In the memory card interface 306, the user's memory card is detached.

The digital image signal from the digital camera processor 307 is input to the LCD driver 314, whereby an image is displayed on the color LCD panel 35.

On the other hand, the digital video signal from the digital camera processor 307 can be transmitted by serial communication via the USB (Universal Serial Bus) connection 21a, and through the video filter 309 and the video output unit 21c. Can be transmitted as a video signal.

The audio processor 313 outputs the audio signal from the microphone MIC to the digital camera processor 307 or the speaker SP, and outputs the audio signal from the digital camera processor 307 to the speaker SP.

On the other hand, the microcontroller 312 drives the flash 12 by controlling the operation of the flash controller 311 according to the signal from the flash-light amount sensor 19.

3 includes a power supply circuit 250 for supplying power to each circuit of the digital camera 1, a charging device 400 connected to a battery 600 and an external charger 350 to charge a battery. A primary battery or a secondary battery may be used as the battery, and a secondary battery of various types and capacities including a lithium ion battery may be used as the secondary battery. The secondary battery may be used after being discharged and recharged. The charging device 400 of the present invention is a charging device that charges a rechargeable battery in a state in which the secondary battery is stored in a camera. Instead of using the device, a mobile phone charger can be used to charge the secondary battery in the camera.

Cell phone chargers are chargers used to charge cell phone batteries by plugging connectors into the cell phone's input and output terminals. In the past, each phone's manufacturer had an 18-pin or 24-pin connector with a different number of pins. There was no compatibility because it was made in a separate standard such as the arrangement of pins and the purpose of use. For this reason, when replacing the mobile phone, there was an inconvenience such as the need to replace the charger. Therefore, in order to ensure compatibility, the telecommunication technology association (TTA), the Korean telecommunications association, has established a standard for 24-pin mobile phone chargers. Of course, it is also spread abroad. The TTA standard 24-pin charger is equipped with a 24-pin connector for pin assignment and pin usage according to the TTA standard, and the charger can determine the appropriate charging current according to the battery of various types and capacities.

The table below shows the pin numbers related to the charging of the TTA standard 24-pin mobile phone charger, the signal names of the mobile phone input / output terminals and the functions of the pins.

Pin number Signal name Pin function One  Battery ID At 27 KΩ: 450 mA
For 4.7 KΩ: 750 mA
At 1.5 KΩ: 900 mA (optional)
* Allowable current deviation: ± 50 mA
* The ID resistance value must be recognized as one of the values above for charging.
* When not outputting 900 mA, recognize 1.5 KΩ but allow 750 mA output. 4, 5  POWER (+5 ~ 5.5V)  Power supply terminal with built-in charging circuit 21, 22  POWER (+ 4.2V) / SWB +  Charging circuit external terminal power supply 12, 19  POWER GROUND  Power ground

Pin 1 of the TTA standard 24-pin charger is called a battery ID pin. The pin is used to determine the type and capacity of the secondary battery used in the mobile phone so that charging can be performed at an appropriate charging current. In addition to the positive and negative electrodes used to supply power and charge power to mobile phones, secondary batteries for mobile phones are equipped with recognition electrodes, and have different values depending on the type or capacity of secondary batteries between the recognition electrode and the negative electrode. The internal resistance of is connected. The charger reads this internal resistance connected to the battery identification pin to determine the type of the connected secondary battery and determines how much charging current to charge the secondary battery according to the type of the secondary battery. As can be seen from the table, when this internal resistance is 27 KΩ, it supplies 450 mA of charging current, and when 4.7 KΩ, it supplies 750 mA of charging current. Supplying is optional. Pins 21 and 22 are used to supply power to a mobile phone terminal with an external charging circuit. Pins 4 and 5 are used to supply power to a mobile phone terminal with an internal charging circuit. Pins 12 and 19 are for power grounding. Here, the pins used for the power supply form a power supply terminal, and the battery recognition pins form a battery recognition terminal.

On the other hand, a secondary battery is commonly used in a mobile phone, whereas in the case of the digital camera 1, it is common to use both a primary battery and a secondary battery. Unlike the rechargeable battery that can perform charging and discharging, the primary battery that has reached the end of its life with a single discharge can cause the camera to break down due to leakage or damage inside the cell. When the secondary battery is housed, it is preferable that no charging current is supplied.

Also in the case of the secondary battery (600 of FIGS. 4, 6, and 8) used in the camera, as shown in FIGS. 4, 6 and 8, the recognition electrode 602 is similar to the secondary battery for the mobile phone. Although the internal resistance Ri exists between the recognition electrode 602 and the negative electrode 601, the internal resistance value is not standardized like a secondary battery for a mobile phone. For example, a secondary battery for UCA-3, Samsung Techwin's digital camera model, has a built-in thermistor of 10 KΩ instead of a resistor. This is a built-in case to protect the cells of the secondary battery according to the temperature. As shown in Table 1, this resistance value is not the resistance value defined in the standard of the charger for the mobile phone, and also changes the temperature due to the characteristics of the thermistor. If the resistance value is changed, it will not be able to charge stably. A secondary battery charging device in a portable device of the present invention constructed in view of the above points is shown in FIG.

When the portable device of the present invention is a digital camera, the secondary battery charging device is indicated by reference numeral 400 of FIG. 3.

4 and 5 illustrate a charging device as a preferred embodiment according to the present invention, wherein a charger for a portable terminal according to the TTA standard is connected when a secondary battery and a primary battery are stored in a digital camera, respectively. To show 6 and 7 schematically show the secondary or primary battery, the charger, and the charging device of FIGS. 4 and 5, respectively.

Referring to the drawings, the charging device 400 of the primary battery and the secondary battery portable device according to the present invention, the primary battery 700 or 2 accommodated in the primary battery and the secondary battery portable device A charging device connected between the secondary battery 600 and the charger 350 connected from the outside and selectively charging the secondary battery 600, comprising: a battery connection terminal unit 410; And a switching means 420.

The battery connection terminal unit 410 is connected to electrode terminals 601, 602, 603, 701, and 703 of a battery housed in a portable device. The switching means 420 is connected between the battery connection terminal unit 410 and the charger 350, 1 from the charger 350 when the battery stored in the portable device is the primary battery (700 in Fig. 5) The current is supplied from the charger 350 to the secondary battery 700 when the current stored in the portable device is the secondary battery (600 in FIG. 4) so that no current is supplied to the secondary battery 700. Be sure to

The battery connection terminal unit 410 is connected to the electrode terminals 601, 602, 603, 701, and 703 of a battery housed in a portable device, and includes a negative terminal 411, a positive terminal 413, and a recognition. A terminal 412 is provided.

The battery accommodated in the portable device may include both a primary battery 700 and a secondary battery 600. The primary battery 700 includes a negative electrode 701 and a positive electrode 703, and a secondary battery. The cathode 600 has a cathode 601, an anode 603, and an electrode 602 for recognition. Accordingly, as described above, the switching means 420 senses whether the recognition electrode 602 is present, and thus the primary electrode 700 or the secondary electrode 600 can be distinguished.

To this end, the battery connection terminal unit 410, the negative electrode which is in contact with the negative electrode (601, 701), the positive electrode (603, 703), and the recognition electrode (602) of the battery when the battery is accommodated inside the portable device The terminal 411, the positive terminal 413, and the recognition terminal 412 are provided. That is, the switching means 420 connects the power supply terminal of the charger 350 and the positive electrode 413 when the electrode 602 for recognition of the secondary battery is connected to the recognition terminal 412.

When charging power is supplied by the charger 350 when the primary battery is stored in the portable device, the charging voltage is 4.2V and the primary battery voltage is 3.0V in the present embodiment. The organic material may be damaged, but the battery supplied from the power supply terminal of the charger is blocked by the leveling means 420 even when the charger is connected when the primary battery is accommodated in the portable device according to the present invention. This problem can be solved.

Various types of switching elements may be used as the switching means 420. However, the switching means 420 may be a relay that is driven ON by connecting the recognition terminal 412 and the electrode 602 for recognition of the secondary battery. . That is, by using a relay as a switching element, a problem that the charging voltage of the secondary battery due to the voltage drop in the case of the conventional switch element is lowered, the charge rate can be insufficient can be prevented.

6 to 9 show an embodiment in which a relay is used as the switching means 420. 6 and 7 show an embodiment in which a driving voltage for driving the switching means is supplied from the battery when the secondary battery and the primary battery are accommodated in the portable device, respectively.

That is, when the switchable element is inserted between the charger and the electrode of the battery in the portable device (system) and the secondary battery is inserted, the recognition electrode 602 and the recognition terminal 412 are connected, and the driving terminal of the relay The circuit is connected through the internal resistance Ri or thermistor connected to the recognition electrode 602, the power is supplied to the relay driving terminal, and the relay is driven on, so that the positive electrode of the secondary battery is supplied from the power supply terminal of the charger. A charging current flows through the secondary battery 600 through 603 to enable charging. That is, the driving terminal of the relay 420 is connected to the positive electrode 603 of the secondary battery, so that driving power of the relay is supplied from the secondary battery 600.

At this time, when the primary battery is inserted into the portable device (system), since there is no electrode connected to the recognition terminal 412 in the primary battery, the recognition terminal 412 is opened to drive the relay from the primary battery. Since no voltage is applied and the relay is not driven to maintain the OFF state, charging current is not supplied from the charger 350 to the primary battery 700, thereby protecting the battery from overvoltage.

8 and 9 show a charging device as another preferred embodiment according to the present invention, showing that the charger is connected to the secondary battery and the primary battery through the charging device, respectively.

Referring to the drawings, in the present embodiment, when the secondary battery and the primary battery are housed in the portable device, except that the driving voltage for driving the switching means is supplied from the charger in FIGS. 6 and 7. It has the same configuration and the same function as the illustrated embodiment.

The charging device 500 of the primary battery and the secondary battery portable device is connected from the outside with the primary battery 700 or the secondary battery 600 stored in the primary battery and the secondary battery portable device. Is connected between the charger 350 is a charging device for selectively charging the secondary battery 600, the battery connection terminal unit 510; And switching means 520.

The battery connection terminal unit 510 has a negative electrode terminal 511 in contact with the negative electrodes 601 and 701, the positive and negative electrodes 603 and 703, and the recognition electrodes 602, respectively, when the battery is housed inside the portable device. ), A positive terminal 513, and a recognition terminal 512 are provided. That is, the switching means 520 connects the power supply terminal of the charger 350 and the positive electrode 513 when the electrode 602 for recognition of the secondary battery is connected to the recognition terminal 512.

In particular, in this embodiment, since the driving power of the relay 520 is directly received from the charger, when the secondary battery is inserted and the charger is not connected, the relay 520 is recognized from the positive electrode 603 of the secondary battery. It is possible to prevent the occurrence of leakage current that may be generated by a circuit connection connected to the ground GND through the internal resistance Ri connected to the electrode.

10 is a flowchart schematically showing a charging operation by the charging device according to the present invention.

Referring to the drawings, the charging operation (100) by the charging device (400, 500) of the primary battery and the secondary battery portable device, the charger connection step (step 101), the recognition terminal connection determination step (step 102), switching A switching on step (step 103), a normal charging step (step 104), a charging completion (step 105), and a switching off step (step 106) of the switching means.

First, when the charger is connected to the portable device having the primary battery or the secondary electricity inserted therein in step 101 through the charger connection terminal part (200 of FIG. 1), whether the recognition terminals 412 and 512 are connected in step 102 is determined. When the sensing electrode contacts the recognition terminal and makes a circuit connection, the inserted battery is recognized as a secondary battery and the processes of steps 103 to 105 are performed to charge the secondary battery by supplying a charging current. .

If the recognition electrode is not in contact with the recognition terminal in step 102, and a circuit connection is not made, in step 106, the switching means is switched off to protect the primary battery because no charging current is supplied to the primary battery. .

According to an embodiment of the present invention, there is provided a charging device for a portable device for both a primary battery and a secondary battery, and a digital camera including the same. The secondary battery can be selectively charged.

In addition, when the primary battery is accommodated in the portable device, the battery may be prevented from being damaged due to overvoltage.

Although the present invention has been described with reference to one embodiment shown in the accompanying drawings, it is merely an example, and those skilled in the art may realize various modifications and equivalent other embodiments therefrom. I can understand. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (10)

A charging device for selectively charging the secondary battery by being connected between a primary battery or a secondary battery and a charger connected from the outside stored in the primary battery and portable battery combined with a secondary battery, A battery connection terminal unit connected to electrode terminals of a battery housed in the portable device; And Is connected between the battery connection terminal unit and the charger, so that when the battery stored in the portable device is the primary battery so that no current is supplied to the primary battery from the charger, and stored inside the portable device And switching means for supplying a current to the secondary battery from the charger when the battery is a secondary battery, The battery connection terminal unit, A negative electrode terminal connected to the negative electrode of the primary battery or the secondary battery, A positive electrode terminal connected to the positive electrode of the primary battery or the secondary battery, and Charging apparatus for a primary battery and a secondary battery combined portable device having a recognition terminal connected to the electrode for recognition of the secondary battery. The method of claim 1, The charger is a charging device for a portable device that combines a primary battery and a secondary battery, which is a charger for a portable terminal of a TTA standard. delete The method of claim 1, And the secondary battery has an internal resistance having a predetermined resistance value connected between the recognition electrode and the negative electrode. 5. The method of claim 4, The charger includes a battery recognition terminal connected to the electrode for recognition of the secondary battery, the primary battery for recognizing the resistance value of the internal resistance to determine the type of battery stored in the portable device; Charging device for portable devices combined with secondary batteries. The method of claim 1, And said switching means connects the power supply terminal of said charger and said positive electrode when said recognition terminal of said secondary battery is connected to said recognition terminal. The method of claim 6, And said switching means is a relay which is driven ON by connection of said recognition terminal and recognition electrode of said secondary battery. The method of claim 7, wherein The driving terminal of the relay is connected to the positive electrode of the secondary battery, the driving power of the relay is supplied from the secondary battery charging device for a primary battery and a secondary battery portable device. The method of claim 7, wherein And a driving terminal of the relay is connected to a power supply terminal of the charger so that driving power of the relay is supplied from the charger. A digital camera comprising a charging device for a primary battery and a secondary battery combined portable device according to any one of claims 1, 2 and 4 to 9.

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