KR101533281B1 - A digital photographing device and a method for controlling a digital photographing device - Google Patents

Abstract

A digital photographing apparatus according to the present invention includes: a user interface capable of receiving a user input for selecting any one of a plurality of charging modes having different charging rates; A charge current control signal generator for outputting a charge current control signal indicating a charge rate corresponding to the user input; And a charging current generator for generating a charging current for charging the strobe, wherein a magnitude of the charging current is adjusted according to the charging current control signal.

Description

Technical Field [0001] The present invention relates to a digital photographing apparatus and a digital photographing apparatus,

The present invention relates to a digital photographing apparatus and a digital photographing apparatus control method having a strobo (speed light, electronic flash).

When a subject is photographed using a digital photographing apparatus, a light quantity exceeding a certain amount is required. The digital photographing apparatus can adjust the photographing set value such as the shutter speed and the like and adjust the light quantity at the time of photographing. However, even when the shutter speed is set to a low value in a dark environment, the amount of light is too small to obtain a dark photograph. Also, if the shutter speed is set to a low value, there is a problem that the exposure time becomes long and shaking occurs in the photographed photograph. The digital photographing apparatus may be provided with a strobo to provide a light source itself when photographing in an environment with low light amount.

A strobe is a device that uses instantaneous light emitted when a high-voltage DC is passed through a xenon discharge tube as a light source for shooting. It is also called a speed light, an electronic flash, or a speed flash. Strobe is a power source and uses mainly laminated batteries to obtain the high voltage required for the strobe (see the Doosan encyclopedia). Therefore, in order to use the strobe when photographing in the digital photographing apparatus, it takes time to charge the stacked battery used as the power source of the strobe. Generally, electric energy charged in a battery, which is a power source of a digital photographing apparatus, is used for charging a stacked battery for a strobe.

An object of the present invention is to provide a digital photographing apparatus and a digital photographing apparatus control method by which a user can adjust a charge time by providing a plurality of charge modes such as a quick charge mode, a general charge mode and a slow charge mode, have.

Another object of the present invention is to provide a digital photographing apparatus and a digital photographing apparatus control method for adjusting a charge current for charging a stroboscope by software according to user selection.

The digital photographing apparatus according to the first embodiment of the present invention includes a user interface capable of receiving a user input for selecting any one of a plurality of charge modes having different charge rates; A charge current control signal generator for outputting a charge current control signal indicating a charge rate corresponding to the user input; And a charging current generator for generating a charging current for charging the strobe, wherein a magnitude of the charging current is adjusted according to the charging current control signal.

According to the second embodiment of the present invention, the charge current control signal generator may select and output a charge current control signal corresponding to the charge rate corresponding to the user input from a plurality of charge current control signals stored in advance . The charging current generator may determine whether charging of the strobes is completed based on a feedback voltage indicating the voltage level of the strobes and output a charging completion signal indicating whether charging of the strobes is completed or not have. The digital photographing apparatus according to the second embodiment of the present invention is a power supply voltage regulator for regulating a first power supply voltage for generating the charge current and applying the first power supply voltage to the charge current generator, When the charging of the strobes is completed, the first power source voltage of the first level capable of generating the charging current is applied, and when the charging of the strobe is completed, the charging current is generated And a power supply voltage regulator for applying the first power supply voltage of the second level which can not be applied to the first power supply voltage.

Furthermore, the digital photographing apparatus according to the second embodiment of the present invention further includes a mode change judging unit for judging whether or not the charge mode corresponding to the user input can be provided based on the voltage level of the battery included in the digital photographing apparatus Wherein the charging current control signal generating unit generates the charging current control signal corresponding to the charging mode only when the charging current control signal generating unit can provide the charging mode corresponding to the user input based on the determination of the mode change determining unit Can be output. When the charging mode corresponding to the user input can not be provided, the charging current control signal generator outputs a charging current control signal corresponding to a predetermined regular charging mode, and the user interface inputs the charging current control signal A message can be provided that the corresponding charging mode can not be provided.

A digital photography apparatus control method according to a first embodiment of the present invention includes: providing a user interface capable of receiving a user input for selecting any one of a plurality of charging modes having different charging rates; Generating a charge current control signal indicative of a charge rate corresponding to the user input; And generating a charging current for charging the strobes in response to the charging current control signal, wherein the magnitude of the charging current is adjusted in accordance with the charging current control signal.

According to a second aspect of the present invention, the step of generating the charge current control signal includes: selecting a charge current control signal corresponding to a charge rate corresponding to the user input from a plurality of charge current control signals stored in advance, Generating the charge current control signal, and determining whether charging of the strobe is completed based on the feedback voltage indicating the voltage level of the strobe. Preferably, the step of generating the charging current may stop the generation of the charging current when charging of the strobes is completed.

Further, the digital photographing apparatus control method according to the second embodiment of the present invention may further include determining whether the charge mode corresponding to the user input can be provided based on the voltage level of the battery included in the digital photographing apparatus Wherein the step of outputting the charge current control signal may output a charge current control signal corresponding to the charge mode only when the charge mode corresponding to the user input can be provided. The digital photographing apparatus control method according to the second embodiment of the present invention further includes the steps of outputting a charge current control signal corresponding to a predetermined regular charge mode when the charge mode corresponding to the user input can not be provided; And providing a message that the charging mode corresponding to the user input can not be provided.

According to the present invention, various charging modes can be provided according to user's selection by adjusting the charging current for charging the stroboscope by software.

Embodiments of the present invention will now be described with reference to the accompanying drawings. The following description and accompanying drawings are for understanding the operation according to the present invention, and parts that can be easily implemented by those skilled in the art can be omitted.

Furthermore, the specification and drawings are not intended to limit the present invention, and the scope of the present invention should be determined by the claims. The terms used in the present specification should be construed to mean the meanings and concepts consistent with the technical idea of the present invention in order to best express the present invention.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

1 is a diagram showing an exemplary structure of a digital photographing apparatus capable of implementing the digital photographing apparatus and the digital photographing apparatus controlling method according to the present invention.

The digital photographing apparatus 100 capable of implementing the present invention includes an optical section 110, an optical driving section 111, an image capturing element 115, an image capturing element control section 116, an operation section 120, a program storage section 130, A buffer storage unit 140, a data storage unit 150, a display unit 160, a digital signal processor (DSP) 170, and a strobe 180.

The optical unit 110 provides the input optical signal from the subject to the imaging element 115. [ The optical unit 110 may include at least one lens, such as a zoom lens for controlling the angle of view to be narrowed or widened according to the focal length, and a focus lens for focusing the subject. In addition, the optical unit 110 may further include a diaphragm for adjusting the amount of light.

The optical driver 111 controls the position of the lens, opening and closing of the diaphragm, and the like. The focus can be adjusted by moving the position of the lens. In addition, the amount of light can be adjusted by controlling the opening and closing of the diaphragm. The optical driving unit 111 can control the optical unit 110 according to a control signal automatically generated by a video signal input in real time or a control signal manually input by an operation of a user.

The optical signal transmitted through the optical unit 110 arrives at the light receiving surface of the image pickup element 115 and forms an image of the object. The image pickup device 115 may be a charge coupled device (CCD) or a complementary metal oxide semiconductor image sensor (CIS) for converting an optical signal into an electric signal. The sensitivity of the image pickup device 115 can be adjusted by the image pickup device control unit 116. The image pickup element control unit 116 can control the image pickup element 115 in accordance with a control signal automatically generated by the video signal inputted in real time or a control signal manually inputted by the user's operation.

The operation unit 120 is a place where a control signal from the outside of a user or the like can be input. The operation unit 120 includes a shutter-release button for inputting a shutter-release signal for exposing the image pickup device 115 to light for a predetermined period of time, a power button for inputting power, A wide angle-zoom button and a telephoto-zoom button for widening or narrowing the angle of view, a mode selection of a character input mode, a shooting mode, and a playback mode, a white balance setting function selection, and an exposure setting function selection. The operation unit 120 may have various types of buttons as described above, but the present invention is not limited thereto. The operation unit 120 may be implemented as a keyboard, a touch pad, a touch screen, a remote controller, or the like.

The digital photographing apparatus 100 may further include a program storage unit 130 for storing programs such as an operating system and an application system for driving the digital camera, a buffer storage unit for temporarily storing data or result data required during the operation, (140), and a data storage unit (150) for storing various information necessary for the program, including an image file including a video signal.

In addition, the digital photographing apparatus 100 includes a display unit 160 for displaying the operation state of the digital photographing apparatus 100 or the image information photographed by the digital photographing apparatus 100. The display unit 160 may provide visual and / or auditory information to the user. For example, the display unit 160 may include a liquid crystal display panel (LCD), an organic light emitting display panel (OLED), an electrophoretic display panel (EDD), or the like to provide visual information.

The digital photographing apparatus 100 includes a digital signal processing unit 170 that processes input image signals and controls each of the components according to an external input signal.

The strobe 180 is a device that uses a discharge light momentarily generated when a high-voltage direct current flows through a discharge tube as a light source for photographing. The strobe 180 may be provided with a separate power source for instantaneously supplying a high voltage power to the discharge tube, and the power source may be implemented using a stacked battery. The strobe 180 may emit light in response to an external control signal requesting light emission.

The conventional strobe circuit sets the limit value of the charging current to adjust the charging current and the charging time. The charging current is determined in hardware by the position of the setting pin input from the integrated circuit charging the strobes to the integrated circuit. Since the charge current is determined in hardware in the manufacture of the digital photographing apparatus, the digital photographing apparatus is configured to operate only at the set charge current under any circumstances, and it is impossible for the user to adjust the charge time even if he feels that the charge time is long.

In order to charge the strobe, electric energy charged in the battery, which is the power source of the digital photographing apparatus, is generally used. When the strobe is charged, a voltage drop occurs in the battery of the digital photographing apparatus. If the voltage drop of the battery excessively occurs during charging of the strobe, the voltage of the battery falls below the voltage required for maintaining the digital photographing apparatus in the power-on state. Therefore, the charging current for charging the strobe should be set to a value less than a predetermined value in order to maintain the battery voltage required to maintain the power of the digital photographing apparatus.

The present invention provides a digital photographing device by which the user can adjust the charge rate by adjusting the charge current by software. In particular, the present invention can provide a fast charging mode to a user in response to a user input requesting a fast charging mode.

2 is a diagram showing the structure of a digital photographing apparatus according to the first embodiment of the present invention.

The digital photographing apparatus 100a according to the first embodiment of the present invention includes a user interface 210a, a charge current control signal generating unit 220a, a charge current generating unit 230a, and a strobe 180. [

The user interface 210a may receive a user input for the user to select any one of the plurality of charging modes.

In this specification, a plurality of charging modes refers to a charging mode having different charging speeds. For example, the plurality of charge modes may include a fast charge mode, a normal charge mode, and a slow charge mode.

Generally, as the charging speed increases, the voltage drop in the battery of the digital photographing apparatus becomes large. Therefore, the user can select the fast charge mode if the battery capacity remaining in the digital photographing apparatus is sufficient, and if the battery capacity of the digital photographing apparatus is insufficient, the low-speed charge mode can be selected.

The user interface 210a includes a program storage unit 130 for storing computer codes programmed to provide a menu for the user to select any one of a plurality of charge modes, a display unit 160 for displaying the menu ), And an operation unit 120 through which a user can select and input a charging mode.

The charge current control signal generating unit 220a generates a charge current control signal CHARGE corresponding to a user input according to a user input mode inputted through the user interface 210a. The charge current control signal CHARGE represents the magnitude of the current to be generated in order to provide the charge mode corresponding to the user input (mode). The charge current control signal CHARGE may be, for example, a pulse-shaped control signal shown in Fig.

Each charge current control signal CHARGE shown in FIG. 5 represents a limit value for the charge current corresponding to each charge mode. Therefore, the charge current control signals CHARGE have different waveforms according to the respective charge current limit values, and the magnitude of the charge current can be controlled by the charge current control signal CHARGE. The waveform of the charge current control signals CHARGE shown in FIG. 5 is merely an exemplary embodiment, and the present invention is not limited by the waveform of such a charge current control signal CHARGE.

The charge current generating unit 230a receives the charge current control signal CHARGE output from the charge current control signal generating unit 220a and generates a charge current SW having a magnitude corresponding to the charge current control signal CHARGE do. The charging current generated here is used to charge a stacked battery (not shown) provided in the strobe 180.

The strobe 180 provides the charging current generating unit 230a with the feedback voltage FB indicating the voltage level of the stacked battery provided in the strobe 180. [

3 is a diagram showing a structure of a digital photographing apparatus according to a second embodiment of the present invention.

The digital photographing apparatus 100b according to the second embodiment of the present invention includes a user interface 210b, a charge current control signal generating unit 220b, a charge current generating unit 230b, a strobe 180, 310, a charge current control signal storage unit 320, and a power supply voltage regulator 330.

The user interface 210b may receive a user input in which the user selects one of a plurality of charging modes.

The mode change determining unit 310 determines whether or not the user can provide the selected charging mode based on the voltage level of the battery BAT in response to the user input mode input through the user interface 210b do. As the charging speed increases, a voltage drop occurs largely in the battery BAT. When the voltage level of the battery BAT lowers, the digital photographing apparatus determines that the battery BAT is exhausted and operates to turn off the power. Therefore, if the voltage level of the battery BAT is low, a quick charging mode can be provided. The mode change determining unit 310 determines whether or not the user can provide the selected charging mode in consideration of the voltage level of the battery BAT, And outputs the change control signal (mode_con) to the user interface 210b and the charge current control signal generation unit 220b.

When the mode change control signal (mode_con) indicating that the user can not provide the selected charging mode is input, the user interface 210b generates a message indicating that the user can not provide the selected charging mode and provides the message to the user.

The charging current control signal generator 220b generates a charging current control signal corresponding to the charging mode selected by the user in response to the user input (mode) and outputs the charging current control signal. If a mode change control signal (mode_con) indicating that the user can not provide the selected charge mode is input from the mode change determining unit 310, the charge current control signal generating unit 220b generates a charge current control signal corresponding to the predetermined normal charge mode It is possible to generate and output the charge current control signal CHARGE.

The charge current control signal storage unit 320 stores a plurality of charge current control signals corresponding to the respective charge modes. For example, the charge current control signal storage unit 320 stores the charge current control signals as shown in FIG. The charging current control signal generating unit 220b generates a charging current control signal corresponding to the charging mode selected by the user among the plurality of charging current control signals stored in the charging current control signal storage unit 320 in response to the user input CHARGE) to generate a charge current control signal. If a mode change control signal (mode_con) indicating that the user can not provide the selected charge mode is input, the charge current control signal generating unit 220b generates a charge current control signal CHARGE corresponding to a predetermined normal charge mode, From the charge current control signal storage unit 320 and output it.

The charge current generating unit 230b receives the charge current control signal CHARGE output from the charge current control signal generating unit 220b and generates a charge current SW having a magnitude corresponding to the charge current control signal CHARGE do. The charging current generated here is used to charge a stacked battery (not shown) built into the strobe 180.

The power supply voltage regulator 330 applies the first power supply voltage Vin required to generate the charging current in the charging current generator 230b to the charging current generator 230b.

)를 전원 전압 조절부(330)로 출력한다. 기준 전압(Vref)은 스트로보(180)의 적층 건전지의 충전이 완료되었을 때의 피드백 신호(FB)의 전압 레벨을 나타낸다. 따라서 충전 전류 생성부(230b)는 피드백 신호(FB)의 전압 레벨이 기준 전압(Vref)에 도달하면, 충전이 완료되었음을 나타내는 충전 완료 신호(

)를 출력하게 된다. The charging current generating unit 230b receives the feedback signal FB indicating the voltage level of the stacked battery of the strobe 180 from the strobe 180 and compares the feedback signal FB with a predetermined reference voltage Vref, The voltage level of the stacked battery is a charge completion signal ("

To the power supply voltage regulator 330. The reference voltage Vref indicates the voltage level of the feedback signal FB when charging of the stacked batteries of the strobe 180 is completed. Therefore, when the voltage level of the feedback signal FB reaches the reference voltage Vref, the charge current generating unit 230b generates a charge completion signal

).

)에 따라 충전 전류 생성부(230b)로 인가되는 제1 전원 전압(Vin)을 조절한다. 즉, 전원 전압 조절부(330)는 충전이 완료되지 않은 경우, 충전 전류 생성부(230b)에서 충전 전류(SW)를 생성할 수 있는 레벨의 제1 전원 전압(Vin)을 출력하고, 충전이 완료된 경우, 충전 전류 생성부(230b)에서 충전 전류(SW)를 생성할 수 없는 레벨의 제1 전원 전압(Vin)을 출력한다. The power supply voltage regulator 330 receives the charge completion signal

The first power source voltage Vin applied to the charge current generator 230b is adjusted. That is, when the charging is not completed, the power source voltage regulator 330 outputs the first power source voltage Vin at a level capable of generating the charging current SW in the charging current generator 230b, The charging current generating unit 230b outputs the first power source voltage Vin at a level at which the charging current SW can not be generated.

The strobe 180 emits light in response to the trigger signal TRIGGER input through the charge current generating unit 230b.

4 is a diagram showing an exemplary structure of the power supply voltage regulator 330 and the strobe 180 according to the second embodiment of the present invention.

)는 하이 레벨이고, 전류는 제2 전원 전압(Vbias)으로부터 제1 전원 전압(Vin)이 공급되는 노드로 도전되어, 충전 전류 생성부(230b)로 제1 전원 전압(Vin)이 인가된다. 충전이 완료된 경우 충전 완료 신호(

)는 로우 레벨이고, 전류는 제2 전원 전압(Vbias)으로부터 충전 완료 신호(

)가 출력되는 노드로 도전되어, 제1 전원 전압(Vin)이 공급되는 노드로 전류가 공급되지 않게 된다. 제1 커패시터(C1)는 제1 전원 전압(Vin)이 인가되는 노드의 전압을 안정화시킬 수 있다. The exemplary power supply voltage regulator 330a according to the second exemplary embodiment of the present invention may include a first resistance component R1 connected to the second power supply voltage Vbias. When the charging is not completed, the charging completion signal (

Is at a high level and the current is conducted from the second power source voltage Vbias to the node to which the first power source voltage Vin is supplied and the first power source voltage Vin is applied to the charge current generator 230b. When charging is completed, the charging completion signal (

) Is a low level and the current flows from the second power source voltage Vbias to the charge completion signal

Is supplied to the node to which the first power supply voltage Vin is supplied, so that the current is not supplied to the node to which the first power supply voltage Vin is supplied. The first capacitor C1 can stabilize the voltage of the node to which the first power supply voltage Vin is applied.

An exemplary strobe 180a according to the second embodiment of the present invention may include a structure for supplying a power supply voltage to the strobe 180a as shown in Fig. When the charging current SW is supplied from the charging current generating unit 230b, a current is generated through the first diode D1 through the first transformer T1, and electric charge is supplied to the second capacitor C2 The second capacitor C2 is charged. Due to the second capacitor C2 being charged, the strobes 180a can be supplied with the voltage necessary for light emission. A feedback signal FB indicating the voltage level of the second capacitor C2 is output using a voltage divider implemented using the second resistance component R2 and the third resistance component R3.

6 is a flowchart showing a digital photographing apparatus control method according to the first embodiment of the present invention.

The digital photography apparatus control method according to the first embodiment of the present invention generates charge current by adjusting the magnitude of the charge current by software in accordance with the charge mode selected by the user.

The digital photography apparatus control method according to the first embodiment of the present invention provides a user interface through which a user can input a user input for selecting any one of a plurality of charging modes (S602). The user can select any one of a plurality of charge modes through this user interface.

Next, the digital photography apparatus control method according to the first embodiment of the present invention generates a charge current control signal corresponding to the user input (S604). The charge current control signal is a control signal indicating the magnitude of the charge current corresponding to the charge mode selected by the user.

When the charge current control signal is generated, the digital still camera control method generates a charge current having a magnitude corresponding to the charge current control signal (S606). The charging current is provided to charge the strobe 180. The magnitude of the charge current may be adjusted by software by the charge current control signal.

7 is a flowchart showing a digital photographing apparatus control method according to the second embodiment of the present invention.

The digital photography apparatus control method according to the second embodiment of the present invention provides a user interface through which a user can input a user input for selecting any one of a plurality of charging modes (S702).

Next, the digital photography apparatus control method determines whether the user can provide the selected charging mode based on the battery voltage level of the digital photographing apparatus (S704). For example, when the battery voltage level is low, the digital photography apparatus control method determines that the fast charging mode can not be provided.

If the user can provide a charging mode corresponding to the selected charging mode, the digital still camera control method generates a charging current control signal corresponding to the charging mode selected by the user (S706).

If the user can not provide the charging mode corresponding to the selected charging mode, the digital photography apparatus control method provides a message to the user that the user can not provide the selected charging mode (S708), and the predetermined normal charging mode And generates a corresponding charge current control signal (S710).

When the charge current control signal is generated, the digital still camera control method generates a charge current by adjusting the charge current according to the charge current control signal (S712).

Next, the digital photographing apparatus control method determines whether the charging of the strobe 180 is completed based on a signal indicating the voltage level of the stacked battery of the strobe 180 (S714). When the charging is completed, the charging operation of the strobe 180 by the digital photographing apparatus control method ends.

The present invention has been described above with reference to preferred embodiments. It will be understood by those skilled in the art that the present invention may be embodied in various other forms without departing from the spirit or essential characteristics thereof. Therefore, the above-described embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and the inventions claimed by the claims and the inventions equivalent to the claimed invention are to be construed as being included in the present invention.

1 is a diagram showing an exemplary structure of a digital photographing apparatus capable of implementing the digital photographing apparatus and the digital photographing apparatus controlling method according to the present invention.

2 is a diagram showing the structure of a digital photographing apparatus according to the first embodiment of the present invention.

3 is a diagram showing a structure of a digital photographing apparatus according to a second embodiment of the present invention.

4 is a diagram showing an exemplary structure of the power supply voltage regulator 330 and the strobe 180 according to the second embodiment of the present invention.

5 is a diagram showing an exemplary waveform of a charge current control signal.

6 is a flowchart showing a digital photographing apparatus control method according to the first embodiment of the present invention.

7 is a flowchart showing a digital photographing apparatus control method according to the second embodiment of the present invention.

Claims (12)

A digital photographing apparatus having a strobe, A user interface capable of receiving a user input for selecting any one of a plurality of charging modes having different charging rates; A charging current control signal generator for outputting a charging current control signal in a pulse form indicating a limit value for a charging current for charging the strobe based on a charging mode corresponding to the user input; And A charge current generator for adjusting a magnitude of the charge current according to a pulse shape of the charge current control signal; And a digital camera. The method according to claim 1, Wherein the charge current control signal generating unit selects and outputs a charge current control signal corresponding to a charge mode corresponding to the user input from a plurality of charge current control signals stored in advance. The method according to claim 1, Wherein the charge current generation unit determines whether charging of the strobe is completed based on a feedback voltage indicating a voltage level of the strobe and outputs a charging completion signal indicating whether charging of the strobe is completed or not, . The method of claim 3, The digital photographing apparatus includes a power supply voltage regulator for regulating a first power supply voltage for generating the charge current and applying the first power supply voltage to the charge current generator, The first power source voltage of the first level capable of generating the charging current is applied when charging of the strobes is not completed and the first power source voltage of the second level which can not generate the charging current when charging of the strobes is completed, And a power supply voltage regulator for applying one power supply voltage. The method according to claim 1, Wherein the digital photographing apparatus further includes a mode change determining unit for determining whether or not the charge mode corresponding to the user input can be provided based on a voltage level of a battery included in the digital photographing apparatus, Wherein the charge current control signal generating unit outputs the charge current control signal corresponding to the charge mode only when the charge current control signal generating unit can provide the charge mode corresponding to the user input based on the determination of the mode change determining unit, Device. 6. The method of claim 5, wherein if the charging mode corresponding to the user input can not be provided, Wherein the charge current control signal generator outputs a charge current control signal corresponding to a predetermined normal charge mode, Wherein the user interface provides a message that the user can not provide a charging mode corresponding to the user input. A method of controlling a digital photographing apparatus having a strobe, Providing a user interface capable of receiving user input selecting any of a plurality of charging modes having different charging rates; Generating a charge current control signal in a pulse form indicating a limit value for a charge current for charging the strobe based on a charge mode corresponding to the user input; And Generating a charge current for charging the strobes in response to the charge current control signal, the magnitude of the charge current being adjusted in accordance with a pulse shape of the charge current control signal; Way. 8. The method of claim 7, Wherein the generating of the charge current control signal comprises generating a charge current control signal by selecting a charge current control signal corresponding to a charge mode corresponding to the user input from a plurality of charge current control signals stored in advance, Device control method. 8. The method of claim 7, Further comprising the step of determining whether charging of the strobes is completed based on a feedback voltage indicating a voltage level of the strobe. 10. The method of claim 9, Wherein the step of generating the charging current stops generation of the charging current when charging of the strobes is completed. 8. The method of claim 7, The digital photographing apparatus control method may further comprise determining whether or not it is possible to provide a charging mode corresponding to the user input based on a voltage level of a battery included in the digital photographing apparatus, Wherein the step of outputting the charge current control signal outputs a charge current control signal corresponding to the charge mode only when the charge mode corresponding to the user input can be provided. 12. The method of claim 11, wherein if the charging mode corresponding to the user input can not be provided, Outputting a charge current control signal corresponding to a predetermined normal charge mode; And Further comprising the step of providing a message indicating that the user can not provide a charging mode corresponding to the user input.

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