JP2023048003A - Imaging apparatus, control method, and program - Google Patents

Abstract

To enable quick and stable consecutive photographic processing when power is supplied from a power supply device.SOLUTION: An imaging apparatus capable of operating by power supplied from a power supply device includes: imaging means capable of consecutive photographic processing; and control means for controlling to request first voltage necessary for achieving frame speed of the designated consecutive photographic processing from the power supply device when the consecutive photographic processing is performed and request second voltage lower than the first voltage from the power supply device when the consecutive photographic processing is not performed.SELECTED DRAWING: Figure 7

Description

The present invention relates to an imaging device that can operate with power supplied from a power supply device, and a method of controlling the imaging device.

Patent Literature 1 describes a method of switching the power supply source from an external device to a battery in order to limit consumption of power supplied from the external device.

JP 2015-082917 A

However, Japanese Patent Application Laid-Open No. 2002-200002 does not consider improvement of release time lag and frame speed (the number of captured images per unit time) during shooting processing in a digital camera.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to enable fast and stable continuous shooting processing when power is supplied from an external power supply device.

An image pickup apparatus according to the present invention is an image pickup apparatus that can operate with power supplied from a power supply device, and includes image pickup means capable of continuous shooting processing, and designated continuous shooting when continuous shooting processing is performed. A first voltage required to achieve the frame speed of processing is requested from the power supply device, and a second voltage lower than the first voltage is applied to the power supply device when continuous shooting processing is not performed. and control means for controlling the request.

According to the present invention, when power is supplied from an external power supply device, fast and stable continuous shooting processing becomes possible.

1 is a diagram for explaining a system configuration of an imaging device 100 that is an example of an imaging device according to Embodiment 1; FIG. 4 is a time chart when the imaging device 100 and the power supply device 300 according to Embodiment 1 change the voltage by CC communication. 1 is a block diagram showing the configuration of an imaging device 100 according to Embodiment 1. FIG. 2 is a block diagram showing a configuration example of a mechanical drive circuit according to Embodiment 1. FIG. 2 is a block diagram showing the configuration of a battery 103 according to Embodiment 1. FIG. 3 is a block diagram showing the configuration of a DC coupler 222 according to Embodiment 1; FIG. 4 is a flowchart for explaining PPS voltage control processing in the first embodiment; 9 is a flowchart for explaining PPS voltage control processing in the second embodiment;

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

[Embodiment 1]
FIG. 1 is a diagram for explaining the system configuration of an imaging device 100 according to the first embodiment. The imaging device 100 can operate, for example, as a digital camera.

The imaging device 100 has a connection unit 101 and can receive power supply from an external device via the connection unit 101 . Also, the battery 103 is detachably arranged with respect to the battery box 400 that also serves as a grip, and the device can be operated with the electric power of the battery 103 . Details of the battery 103 will be described later (see FIGS. 5 and 6).

The power supply device 300 is connected to the connection portion 101 . The connection unit 101 is a connector conforming to the USB (Universal Serial Bus) Type-C standard, is connected to the power supply device 300 via the USB Type-C cable 200, and can receive power. The imaging apparatus 100 can also operate with power supplied from the power supply device 300 instead of the power of the battery 103 . The power supply device 300 communicates with the imaging device 100 via the connection unit 101 to enable power supply by a PPS (Programmable Power Supply) function conforming to the USB PD (Power Delivery) standard.

The PPS function is a function in which communication is performed via a CC (Configuration Channel) terminal of a USB Type-C connector, and the power supply side changes voltage and current in fine steps in response to a request from the power receiving side. With the PPS function, it is possible to suppress heat generation and conversion loss by changing the voltage and current in small steps on the power supply side.

FIG. 2 is a time chart when the imaging device 100 and the power supply device 300 change the voltage through CC communication during PPS control. The CC communication arrow has a starting point at the sending side of the communication and an ending point at the receiving side of the communication. The VBUS voltage is output from the power supply device 300, which is the source device, and the imaging device 100, which is the sink device, receives power from VBUS.

FIG. 2 shows a time chart after the imaging device 100 receives Source Capabilities including a PDO (Power Data Object) indicating the voltage and current that can be output from the power supply device 300 after outputting the VBUS voltage.

At time T101, the imaging apparatus 100 transmits a "Request" containing information such as a voltage to be requested. The PPS function can request the power supply device 300 to output voltage in units of 20 mV. At time T102, the power supply device 300 receives the “Request” from the imaging device 100 and transmits to the imaging device 100 that the “Request” has been correctly received.

The power supply device 300 confirms the content of “Request” from the imaging device 100, and if valid, transmits “Accept” at time T103, and the imaging device 100 receives it at time T104. Then, the imaging device 100 transmits to the power feeding device 300 that “Accept” has been correctly received, and the power feeding device 300 changes the current VBUS voltage V1 to the voltage V2 requested by the imaging device 100 at time T105. Start.

After completing the change of the output voltage from V1 to V2, the power supply device 300 transmits “PS_RDY” at time T106, and the imaging device 100 receives it. The imaging device 100 receives “PS_RDY” at time T107, transmits to the power supply device 300 that “PS_RDY” has been correctly received, and starts “SinkPPPSPeriodicTimer”.

During PPS control, the Sink needs to periodically send "Request" to the Source. The maximum value of "SinkPPSPeriodicTimer" is defined as 10 s by the standard, and the Sink transmits "Request" to the Source at each time period defined by "SinkPPSPeriodicTimer".

The power supply apparatus 300 starts "PPSCommTimer" after being notified that "PS_RDY" has been correctly received from the imaging apparatus 100 at time T108. During PPS control, the Source needs to periodically receive "Request" from the Sink. The minimum value of "PPSCommTimer" is defined as 12 s and the maximum value as 15 s in the standard, and when "PPSCommTimer" times out, the Source issues a HardReset signal. When the time of "SinkPPSPeriodicTimer" has elapsed from time T107, the imaging apparatus 100 retransmits "Request" including the voltage to be requested and the like at time T109. During PPS control, the above communication and voltage change are repeated.

FIG. 3 is a block diagram showing a configuration example of an imaging device 100, which is an example of an imaging device.

The connection unit 101 is an interface for connecting the imaging device 100 to the power supply device 300 . The imaging device 100 can exchange data with the power supply device 300 via the connection unit 101 . Also, power can be supplied from the power supply device 300 via the connection unit 101 .

The external/internal power control unit 102 supplies the power received from the connection unit 101 to each component of the imaging apparatus 100 via the voltage detection unit 104 . At the same time, the external/internal power control unit 102 can also use the power received from the connection unit 101 to charge the battery 103 . Furthermore, the external/internal power control unit 102 can also supply the power of the battery 103 to each component of the imaging apparatus 100 .

A battery 103 supplies power necessary to operate the imaging apparatus 100 . The battery 103 is detachable from the imaging apparatus 100, and receives power from the connection unit 101 via the external/internal power supply control unit 102 and can be charged. The battery 103 may have a lithium ion battery or the like, or may be a DC coupler 222 . Details of these will be described later (see FIGS. 5 and 6). As will be described later, the DC coupler 222 is connected to a household power outlet via an AC adapter, and can stably supply the maximum required voltage to the imaging apparatus 100 .

Voltage detection unit 104 detects the voltage value of power supplied from battery 103 or connection unit 101 . A main control unit 105 controls each unit of the imaging apparatus 100 according to a program. The system power control unit 106 steps up and down the power supplied from the battery 103 or the connection unit 101, converts it into a voltage suitable for each component, and supplies it to each component. A built-in strobe charging circuit 107 performs control for charging the electric power necessary for lighting the built-in strobe.

The mechanical drive circuit 108 will be described with reference to FIG. The mechanical drive circuit 108 has a mechanical drive controller 501, a shutter drive driver 502, a shutter motor 503, a mirror drive driver 504, and a mirror motor 505, as shown in FIG. The mechanical drive control unit 501 performs control by changing the duty ratio of the PWM signal according to the supply voltage to the shutter drive driver 502 and the mirror drive driver 504 detected by the voltage detection unit 104 . PWM is an abbreviation for Pulse Width Modulation, and is a method of controlling the output average voltage by changing the DUTY ratio. If the DUTY ratio is small, the average voltage will drop, and if the DUTY ratio is large, the average voltage will rise. A shutter drive driver 502 is a driver for driving a shutter motor 503 . A shutter drive driver 502 controls the supply voltage to the shutter motor 503 according to the PWM signal from the mechanical drive control section 501 . A mirror drive driver 504 is a driver for driving the mirror motor 505 . A mirror drive driver 504 controls the voltage supplied to the mirror motor 505 according to the PWM signal from the mechanical drive control section 501 .

Returning to the description of FIG. 3, the imaging unit 109 converts the subject light imaged by the lens included in the imaging unit 109 into an electrical signal, performs noise reduction processing and the like, and outputs the signal as image data. After the captured image data is stored in the memory 111 , it is subjected to a predetermined calculation in the main control unit 105 and recorded in the recording medium 112 .

The display unit 110 displays a viewfinder image at the time of photographing, displays photographed image data, displays characters for operation, and the like.

A memory 111 includes a buffer memory that temporarily stores image data captured by the imaging unit 109, a nonvolatile memory that stores programs executed by the main control unit 105, and the like.

The recording medium 112 can record image data output from the imaging unit 109 . The recording medium 112 may be configured to be detachable from the imaging device 100 or may be built in the imaging device 100 .

The operation unit 113 is used to receive instructions from the user to the imaging apparatus 100 and sends signals to the main control unit 105 . The operation unit 113 includes, for example, a power button used by the user to turn on/off the power of the imaging device 100 and a release switch used to instruct shooting. The operation unit 113 also includes a playback button for instructing playback of image data, a mode dial for instructing the operation mode of the imaging device 100, a touch panel formed on the display unit 110, and the like. The release switch has switches SW1 and SW2. The switch SW1 is turned ON when the release switch is in a so-called half-pressed state. As a result, the main control unit 105 receives an instruction to prepare for photographing such as AF (autofocus) processing and AE (automatic exposure) processing, and enters a photographing standby state. In addition, the switch SW2 is turned ON when the release switch is in a so-called full-press state. As a result, the main control unit 105 accepts an instruction for photographing.

Next, with reference to FIG. 5, the battery 103 having a lithium ion battery or the like will be described. Also, the configuration of the DC coupler 222 will be described with reference to FIG.

In FIG. 5, battery 103 has battery cell 216 and battery control unit 217 . The battery cell 216 is connected to the battery control unit 217 , and supplies power to the imaging device 100 via the battery control unit 217 , power supply path 218 and power contact unit 220 . The battery cell 216 also supplies power to the power control unit 217 . A plurality of battery cells 216 may be provided.

In FIG. 6, an AC adapter connection part 223 is a power contact connected to an AC adapter for supplying power to the DC coupler 222 . Power supplied from the AC adapter is supplied to the imaging apparatus 100 via the DC coupler control section 224 , power supply path 225 and power contact section 226 .

The DC coupler control unit 224 has a power supply monitoring unit that monitors the voltage input to the DC coupler 222 and a communication function unit that communicates with the main control unit 105 in the imaging apparatus 100 . The main control unit 105 communicates with the DC coupler control unit 224 via the communication contact unit 228 and the signal line 227 to recognize that the DC coupler is attached.

Next, a process 700, which is the PPS voltage control process in the first embodiment, will be described with reference to FIG.

In step S100, the main control unit 105 determines whether or not the operation mode of the imaging device 100 is the continuous shooting mode. If the operation mode of the imaging apparatus 100 is the continuous shooting mode, the main control unit 105 advances the process 700 to step S101. If the operation mode of the imaging apparatus 100 is not the continuous shooting mode, the main control unit 105 advances the process 700 to step S125.

In step S101, when the frame speed can be selected from a plurality of options, the main control unit 105 determines the target value of the supply voltage required to realize (achieve) the selected (designated) frame speed. Set the target voltage V2. Here, the frame speed indicates the number of captured images per unit time.

In step S102, the main control unit 105 determines whether the release switch has been half-pressed and the imaging apparatus 100 is ready for shooting. If the imaging apparatus 100 is not ready for shooting, the main control unit 105 repeats the process of step S102. When the imaging apparatus 100 is ready for shooting, the main control unit 105 advances the process 700 to step S105.

In step S105, the main control unit 105 starts processing for changing the PPS voltage toward the target voltage V2.

In step S110, the main control unit 105 determines whether or not the release switch has been fully pressed and the imaging apparatus 100 has entered a photographing start state. If the imaging apparatus 100 is not in the shooting start state, the main control unit 105 advances the process 700 to step S115. When the image capturing apparatus 100 is in a shooting start state, the main control unit 105 advances the process 700 to step S120.

At step S115, the main control unit 105 confirms whether the PPS voltage has reached the target voltage V2. If the PPS voltage has not reached the target voltage V2, the main control unit 105 returns the process 700 to step S105 and continues the voltage change process. If the target voltage V2 has been reached, the main control unit 105 advances the process 700 to step S120.

In step S120, the main control unit 105 stops changing the PPS voltage and fixes the voltage. In this case, an instruction to start shooting may be issued in step S110 before the PPS voltage reaches the target voltage V2. In that case, the PPS voltage is fixed at that voltage even before reaching the target voltage V2.

In step S125, the main control unit 105 determines whether or not an instruction to start shooting has been issued. If the shooting start instruction has been issued, the main control unit 105 advances the process 700 to step S130. If the shooting start instruction has not been issued, the main control unit 105 repeats step S125.

In step S130, the main control unit 105 starts mechanical driving (imaging processing) for imaging, and advances the process 700 to step S135.

In step S135, the main control unit 105 determines whether or not the imaging process has ended. If the main control unit 105 determines that the shooting process has ended, the main control unit 105 advances the process 700 to step S140. If it is determined that the shooting process has not ended, the main control unit 105 returns the process 700 to step S130 to continue mechanical driving (shooting process).

In step S140, the main control unit 105 starts processing for changing the PPS voltage toward the voltage V1, which is an appropriate voltage in terms of heat generation, and advances the processing 700 to step S145.

At step S145, the main control unit 105 confirms whether the PPS voltage has reached the voltage V1. If the PPS voltage has not reached the voltage V1, the main controller 105 returns the process 700 to step S140. If the PPS voltage has reached the voltage V1, the main controller 105 advances the process 700 to step S150.

At step S150, the main controller 105 fixes the PPS voltage to the voltage V1. The process 700 then ends.

As described above, in the first embodiment, when power is supplied from the power supply device 300 to each component of the image capturing apparatus 100 by the PPS function, the PPS voltage is set to the PPS voltage of the continuous image capturing process before the shooting preparation instruction is issued. A voltage V1 lower than the target voltage V2 at which the target frame speed is obtained is set. Thereby, heat generation of the imaging device 100 can be suppressed. Further, when the continuous shooting process is performed, the PPS voltage is increased from the voltage V1 to the target voltage V2 at the stage when the shooting preparation instruction is issued. In this case, if the shooting instruction is given after the PPS voltage has risen to the target voltage V2, the PPS voltage is fixed when it reaches the target voltage V2. As a result, the continuous shooting process can be performed at the target voltage V2, so that the target frame speed of the continuous shooting process can be realized. Also, if a photographing instruction is issued before the PPS voltage reaches the target voltage V2, the PPS voltage is fixed at a voltage between V1 and V2 at that time, and the continuous photographing process is immediately started. This can prevent the release time lag from increasing. Further, by fixing the PPS voltage to a voltage between V1 and V2, even if the target frame speed cannot be achieved, continuous shooting processing can be realized at a faster and more stable frame speed than in the case of voltage V1.

[Embodiment 2]
Processing 800, which is the PPS voltage control processing in the second embodiment, will be described below with reference to FIG. Note that the configuration of the imaging device 100 of Embodiment 2 is the same as the configuration of the imaging device 100 of Embodiment 1, so description thereof will be omitted.

In step S200, the main control unit 105 determines whether or not the operation mode of the imaging device 100 is the continuous shooting mode. When the operation mode of the imaging apparatus 100 is the continuous shooting mode, the main control unit 105 advances the process 800 to step S201. If the operation mode of the imaging apparatus 100 is not the continuous shooting mode, the main control unit 105 advances the process 800 to step S210.

In step S201, if the frame speed can be selected from a plurality of options, the main control unit 105 determines the supply voltage required to complete the mechanical drive within the shooting processing time for one frame at the selected frame speed. A target voltage V2, which is a target value, is set.

In step S202, the main control unit 105 determines whether the release switch has been half-pressed and the imaging apparatus 100 is ready for shooting. If the imaging apparatus 100 is not ready for shooting, the main control unit 105 repeats the process of step S202. When the imaging apparatus 100 is ready for shooting, the main control unit 105 advances the process 800 to step S204.

In step S<b>204 , the main control unit 105 sets the power supply path to the power supply path from the power supply device 300 .

In step S206, the main control unit 105 determines whether the current PPS voltage supplied from the power supply device 300 is less than the target voltage V2. If the PPS voltage is less than the target voltage V2, the main controller 105 advances the process 800 to step S207. If the PPS voltage is equal to or higher than the target voltage V2, the main controller 105 advances the process 800 to step S208.

In step S207, the main control unit 105 starts processing for changing the PPS voltage supplied from the power supply device 300 and increases the PPS voltage.

At step S<b>208 , the main control unit 105 fixes the PPS voltage supplied from the power supply device 300 .

In step S210, the main control unit 105 determines whether or not the release switch has been fully pressed and the imaging apparatus 100 has entered a shooting start state. If the imaging apparatus 100 is not in the imaging start state, the main control unit 105 returns the process 800 to step S206. When the image capturing apparatus 100 is in a shooting start state, the main control unit 105 advances the process 800 to step S221.

In step S221, the main control unit 105 determines whether or not an instruction to start mechanical driving has been given. If the mechanical driving is not started, the main control unit 105 repeats the process of step S221. When mechanical driving is started, the main control unit 105 advances the process 800 to step S223.

In step S<b>223 , the main control unit 105 compares the current PPS voltage supplied from the power supply device 300 and the voltage of the battery 103 in the battery box 400 . If the voltage of battery 103 is lower than the PPS voltage, main controller 105 advances process 800 to step S224. If the voltage of the battery 103 is equal to or higher than the PPS voltage, the main controller 105 advances the process 800 to step S225.

In step S224, the main control unit 105 stops the process for changing the PPS voltage supplied from the power supply device 300, and fixes the PPS voltage.

In step S<b>225 , the main control unit 105 switches the power supply path to the power supply path from the battery 103 in the battery box 400 .

At step S230, the main control unit 105 starts mechanical driving.

In step S231, the main control unit 105 determines whether or not a stop condition for stopping mechanical driving is satisfied. If the stop condition is satisfied, the main control unit 105 advances the process 800 to step S232. If the stop condition is not satisfied, the main control unit 105 returns the process 800 to step S230.

In step S<b>232 , the main control unit 105 determines whether power is supplied from the power supply device 300 . If the power supply is from the power supply device 300, the main control unit 105 advances the process 800 to step S233. If the power supply is not from the power supply device 300, the main control unit 105 advances the process 800 to step S235.

In step S233, the main control unit 105 restarts the process for changing the PPS voltage supplied from the power supply device 300 and increases the PPS voltage.

In step S235, the main control unit 105 determines whether or not the imaging process has ended. If the main control unit 105 determines that the shooting process has ended, the main control unit 105 advances the process 800 to step S237. When determining that the imaging process has not ended, the main control unit 105 returns the process 800 to step S221.

In step S<b>237 , the main control unit 105 determines whether power is supplied from the power supply device 300 . If the power supply is from the power supply device 300, the main control unit 105 advances the process 800 to step S240. If the power supply is not from the power supply device 300, the main control unit 105 advances the process 800 to step S238.

In step S<b>238 , the main control unit 105 switches the power supply path to the PPS voltage supplied from the power supply device 300 .

In step S240, the main control unit 105 starts processing to change the PPS voltage toward the appropriate voltage V1 in terms of heat generation, and advances the processing 800 to step S245.

At step S245, the main control unit 105 determines whether the PPS voltage has reached V1. If the PPS voltage has reached V1, process 800 ends. If the PPS voltage has not reached V1, the main controller 105 returns the process 800 to step S240 and continues the process for changing the PPS voltage.

As described above, in the second embodiment, when power is supplied from the power supply device 300 to each component of the imaging device 100 by the PPS function, when continuous shooting processing is performed, the stage at which the shooting preparation instruction is issued , the PPS voltage is increased from the voltage V1 to the target voltage V2. In this case, if the shooting instruction is given after the PPS voltage has risen to the target voltage V2, the PPS voltage is fixed when it reaches the target voltage V2. As a result, the continuous shooting process can be performed at the target voltage V2, so that the target frame speed of the continuous shooting process can be realized. Also, if the shooting instruction is given before the PPS voltage reaches the target voltage V2, the battery voltage and the PPS voltage are compared at that time, and if the battery voltage is equal to or higher than the PPS voltage, the power supply is switched from the PPS function to the battery. switch to and immediately shift to continuous shooting processing. Also, when the battery voltage is lower than the PPS voltage, the PPS voltage is fixed, and the process immediately proceeds to the continuous shooting process. This can prevent the release time lag from increasing. Further, when the PPS voltage is lower than the battery voltage while the PPS voltage is rising, the battery voltage is used for the mechanical driving, so that the continuous shooting process can be realized at a faster and more stable frame rate. Further, by increasing the PPS voltage while mechanically driving with the battery voltage, the PPS voltage can be reliably increased to the target voltage V2.

[Embodiment 3]
At least one of the various functions, processes and methods described in the above embodiments can also be implemented by a personal computer, microcomputer, CPU (Central Processing Unit) or microprocessor executing a program. Hereinafter, in Embodiment 3, a personal computer, microcomputer, CPU, or microprocessor will be referred to as "computer X". In the third embodiment, a program for controlling the computer X and for implementing at least one of the various functions, processes and methods described in the above embodiments is referred to as "program Y".

At least one of the various functions, processes and methods described in the above embodiments are implemented by the computer X executing the program Y. In this case, program Y is supplied to computer X via a computer-readable storage medium. A computer-readable storage medium in Embodiment 3 includes at least one of a hard disk device, a magnetic storage device, an optical storage device, a magneto-optical storage device, a memory card, a volatile memory, a non-volatile memory, and the like. A computer-readable storage medium in Embodiment 3 is a non-transitory storage medium.

100: imaging device, 101: connection unit, 103: battery, 105: main control unit, 108: mechanical drive circuit, 300: power supply device

Claims (10)

An imaging device operable with power supplied from a power supply device,
imaging means capable of continuous shooting processing;
When the continuous shooting process is performed, the first voltage required to achieve the designated frame speed of the continuous shooting process is requested from the power supply device. and control means for controlling to request a second voltage lower than the first voltage from the power supply device. 2. The method according to claim 1, wherein said first voltage is a voltage required to drive a motor for driving a shutter and a motor for driving a mirror of said imaging device in order to achieve said frame speed. Imaging device. The control means requests the power supply device to increase the supply voltage from the second voltage to the first voltage when a photographing preparation instruction for preparing for continuous photographing processing is issued. 3. The imaging apparatus according to claim 1, wherein: If an instruction to execute continuous shooting processing is given before the supply voltage from the power supply device rises to the first voltage, the control means reduces the supply voltage from the power supply device to the continuous shooting voltage. 4. The imaging apparatus according to claim 3, wherein the power supply device is requested to fix the voltage to the voltage at the time when the instruction to execute the process is issued. The control means reduces the voltage supplied from the power supply device to the first voltage when an instruction to execute the continuous shooting process is issued after the voltage supplied from the power supply device has increased to the first voltage. 5. The imaging device according to claim 3, wherein the power feeding device is requested to fix the voltage. When an instruction to execute the continuous shooting process is given before the voltage supplied from the power supply device rises to the first voltage, the control means controls the voltage of the battery arranged in the imaging device and the The voltage supplied from the power supply device is compared, and if the voltage of the battery is higher than the voltage supplied from the power supply device, a state of receiving power from the battery from a state of receiving power supply from the power supply device. 6. The imaging apparatus according to any one of claims 3 to 5, wherein control is performed so as to switch to . The control means requests the power supply device to continue the process of increasing the voltage supplied from the power supply device to the first voltage when switching to a state of receiving power supply from the battery. 7. The imaging device according to claim 6. The imaging device according to any one of claims 1 to 7, wherein the second voltage is a voltage for suppressing heat generation of the imaging device. A control method for an imaging device operable with power supplied from a power supply device, comprising:
a step of controlling to request the power supply device to apply a first voltage necessary to achieve a designated frame speed of the continuous shooting process when the continuous shooting process is performed;
and a step of controlling to request a second voltage, which is lower than the first voltage, from the power supply device when continuous photographing processing is not performed. A computer of an imaging device that can operate with power supplied from a power supply device,
a step of controlling to request the power supply device to apply a first voltage necessary to achieve a designated frame speed of the continuous shooting process when the continuous shooting process is performed;
and controlling to request a second voltage, which is lower than the first voltage, from the power supply device when continuous shooting processing is not performed.

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