Electronic apparatus, method for controlling electronic apparatus, and program

Abstract

To provide an electronic apparatus capable of shortening the wait time for which a user cannot operate the electronic apparatus and just waits, for example, when changing operation conditions of the electronic apparatus, and a method and program for electronic apparatus.SOLUTION: An imaging device 100 comprises determination means (processor 103) for determining a value of an applied voltage that a power supply part 120 should apply to the imaging device 100 when electric power is supplied, and instruction means (processor 103) for instructing the power supply device 120 to supply the electric power by the applied voltage value. The instruction means instructs the power supply device 120 to increase the applied voltage value up to a first applied voltage value when a setting screen is displayed. When the operation conditions are changed on the setting screen, the determination means determines the applied voltage value as a second applied voltage value according to the operation conditions. The instruction means changes the first applied voltage value to the second applied voltage value and instructs the power supply device 120 to supply the electric power by the second applied voltage value.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an electronic device, a control method for an electronic device, and a program. [Background technology]

[0002] One of the well-known USB standards is the USB TYPE-C standard, which is a standard for connectors that connect electronic devices together via a cable. Connectors that comply with the USB TYPE-C standard can be used for data communication between electronic devices, as well as for supplying power from one electronic device to another. The USB PD (Power Delivery) standard, which is a method of power supply in the USB standard, allows electronic devices that comply with the USB PD standard to send and receive information about power supply. Power is then supplied according to a power supply profile that is compatible with both devices.

[0003] In recent years, power supply devices for information processing devices such as smartphones and PCs have been shifting to comply with the USB PD standard. In particular, USB PD 3.0, the most widely supported standard among the USB PD standards, offers two main power supply modes: PDO (Power Data Object) and PPS (Programmable Power Supply). PDO allows for relatively large changes in the amount of power supplied. In contrast, PPS allows for smaller changes in the amount of power supplied, even while the information processing device is in operation. Comparing these two features, PDO tends to supply more power than is required, while PPS tends to provide a more consistent supply.

[0004] For example, it is expected that digital video cameras will also support the USB PD standard in the future. Digital video cameras have a main unit that captures images of a subject and records them on a recording medium, and a display unit that displays the captured images and setting menus. The main unit is connected to a power supply device, such as a battery or a power adapter, that supplies power. The power consumption of the main unit varies depending on settings such as the shooting mode. Therefore, the power consumption value may be equal to the supplied power value, or there may be a slight difference between the power consumption value and the supplied power value. For example, if the power consumption value is significantly lower than the supplied power value, some power may be wasted. In such cases, using PPS can enable efficient power supply, i.e., avoiding wasted power consumption, by adjusting the supplied power to match the power consumption according to the settings while the digital video camera is operating.

[0005] Patent Document 1 describes a semiconductor integrated circuit that controls a signal processing device that operates on the output voltage of a regulator circuit. This semiconductor integrated circuit has a control circuit that receives a request to change the operating mode of the signal processing device, changes the output voltage of the regulator circuit, and changes the operating mode of the signal processing device in accordance with the change request. This control circuit enables the operating mode of the signal processing device to be changed more quickly and stably with less power consumption. Furthermore, the semiconductor integrated circuit described in Patent Document 1 suspends the change of the operating mode of the signal processing device after the operating mode of the signal processing device is changed until the output voltage of the regulator circuit stabilizes. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-59867 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when the semiconductor integrated circuit described in Patent Document 1 is installed in a digital video camera, changing settings such as the shooting mode may result in a wait time until the supply voltage reaches a value appropriate for the setting. Furthermore, because a PPS also has an upper limit on the current of a power supply device, increasing the supply power requires increasing the voltage, which may further increase the time required for the voltage transition in the PPS. Therefore, when changing settings that increase power consumption, it may take an excessive amount of time until the desired voltage is reached, which may result in, for example, periods when the device cannot be operated or the setting change may be reflected late, causing the user to wait for a certain period of time before making an operation.

[0008] The present invention has been made in view of the above-mentioned problems, and aims to provide an electronic device, a control method for an electronic device, and a program that can shorten as much as possible the waiting time during which a user is unable to operate the electronic device when, for example, changing the operating conditions of the electronic device. [Means for solving the problem]

[0009] In order to achieve the above object, the electronic device of the present invention is an electronic device that is connected to a power supply device capable of supplying power compliant with the USB PD standard and receives the power from the power supply device, and is equipped with: a display means for displaying a setting screen on which operating conditions of the electronic device can be set; a determination means for determining an applied voltage value to be applied by the power supply device to the electronic device when supplying the power; and an instruction means for instructing the power supply device to supply the power at the applied voltage value determined by the determination means, wherein when the setting screen is displayed on the display means, the instruction means issues a first instruction to the power supply device to increase the applied voltage value to a first applied voltage value; when the first instruction is issued and the operating conditions are changed on the setting screen, the determination means determines the applied voltage value to a second applied voltage value in accordance with the operating conditions; and the instruction means issues a second instruction to the power supply device to change the first applied voltage value to the second applied voltage value and supply the power at the second applied voltage value. [Effects of the Invention]

[0010] According to the present invention, for example, when changing the operating conditions of an electronic device, it is possible to shorten as much as possible the waiting time during which the user is unable to operate the electronic device. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a block diagram showing an example of a hardware configuration when the electronic device according to the first embodiment is applied to an imaging device. [Figure 2] FIG. 2 is a block diagram showing an example of the hardware configuration of a USB unit and a power supply device of the imaging device. [Figure 3] 10 is a flowchart illustrating a process executed by the imaging device. [Figure 4] 10A to 10C are diagrams illustrating an example of transition of screens displayed on a display panel of the imaging device. [Figure 5] FIG. 10 is a block diagram showing an example of a hardware configuration when an electronic device according to a second embodiment is applied to an imaging device. [Figure 6] 10 is a flowchart illustrating a process executed by the imaging device. DETAILED DESCRIPTION OF THE INVENTION

[0012] Each embodiment of the present invention will be described in detail below with reference to the drawings. However, the configurations described in each of the following embodiments are merely examples, and the scope of the present invention is not limited to the configurations described in each embodiment. For example, each component constituting the present invention can be replaced with any configuration that can perform the same function. Also, any component may be added. Furthermore, any two or more configurations (features) of each embodiment can be combined.

[0013] First Embodiment A first embodiment will be described below with reference to FIGS. 1 to 4. FIG. 1 is a block diagram showing an example of a hardware configuration when an electronic device according to the first embodiment is applied to an imaging device. The imaging device 100 shown in FIG. 1 is a digital video camera capable of capturing moving images. The imaging device 100 includes a lens unit 101, an imaging element 102, a processor 103, a memory (storage means) 104, a storage medium 105, a UI (User Interface) unit 106, and a display panel (display means) 107. The imaging device 100 also includes a USB unit 108, a power supply circuit 109, a battery 110, and a temperature sensor 111. The lens unit 101 forms an optical image of a subject on the imaging surface of the imaging element 102. The imaging element 102 generates image data from the optical image formed on the imaging surface. The processor 103 is a control unit (computer) that controls the overall operation of the imaging device 100. The processor 103 can process the image data generated by the imaging element 102, for example, by performing predetermined image processing and predetermined encoding processing. Image data processed by the processor 103 is recorded in a storage medium 105 or displayed on a display panel 107. When controlling the overall operation of the imaging device 100, the processor 103 executes a program stored in a memory 104. The program includes, for example, a program for causing the processor 103 to execute each part and each means (a control method for an electronic device) of the imaging device 100.

[0014] The USB unit 108 is configured in compliance with the USB standard, USB Type-C standard, USB PD standard, etc., and is connected to a power supply device (power supply equipment) 120 that is also in compliance with the same standards. This allows the imaging device 100 (consumer) to exchange data with the power supply device 120 and receive power from the power supply device 120 (provider). The power supply device 120 is not particularly limited, and may be, for example, a desktop or laptop personal computer. The memory 104 pre-stores the programs and various data. The various data is not particularly limited, and may include, for example, data related to multiple operation modes (operating conditions) that can be set in the imaging device 100, data related to power consumption levels for each operation mode, etc. The operation modes include an "imaging mode" for capturing images such as moving images and still images, a "playback mode" for playing back images captured in the operation mode, and a "data transfer mode" for transferring image data stored in the storage medium 105 to the power supply device 120. In this embodiment, information regarding the power consumption values required for operation in each operation mode is stored in advance in the memory 104. Image data encoded by the processor 103 is stored in the storage medium 105. The storage medium 105 is not particularly limited, and for example, a memory card such as an SD card that is detachably attached to the imaging device 100 can be used.

[0015] The UI unit 106 is a user interface used by the user when operating the imaging device 100. The UI unit 106 is not particularly limited and may be, for example, a touch panel mounted on the display panel 107 or mechanical buttons. The display panel 107 is configured, for example, with a liquid crystal display and can display various screens and images (display process). The screen is not particularly limited and may be, for example, a setting screen that allows the user to set and change the operation mode of the imaging device 100. The image is not particularly limited and may be, for example, a video or still image captured by the imaging device 100. The battery 110 is a power source that supplies power for operating the imaging device 100. The battery 110 is not particularly limited and may be, for example, a lithium-ion battery that is detachably attached to the imaging device 100. The power supply circuit 109 converts power supplied from the battery 110 or the USB unit 108 into power usable by each component, such as the lens unit 101, the image sensor 102, and the processor 103. The temperature sensor 111 is configured by, for example, a thermistor, and detects the temperature of the image sensor 102 connected to the processor 103 .

[0016] 2 is a block diagram showing an example of the hardware configuration of a USB unit and a power supply device of an imaging device. As shown in FIG. 2, the USB unit 108 of the imaging device 100 and the power supply device 120 are connected to each other via a USB cable 202. The USB unit 108 has a voltage control unit 201, a USB connector 203, and a power receiving circuit 204. The power receiving circuit 204 has a voltage conversion circuit 205 and a communication interface 206. The USB connector 203 is a connector connected to the USB cable 202. The USB connector 203 has D+ / D- terminals and SS+ / SS- terminals for data communication lines, a GND terminal (not shown) for a GND signal, a VBUS terminal for a power supply line, a CC terminal, etc. The CC terminal is a terminal compliant with the USB Type-C standard and the USB PD standard and is used for power supply compliant with the USB PD standard.

[0017] The power supply device 120 includes a power supply circuit 211, a communication interface 212, and a processor 213. Power supply modes include PDO (Power Data Object) and PPS (Programmable Power Supply). PDO allows for relatively large changes in the amount of power supplied. On the other hand, PPS allows for smaller changes in the amount of power supplied than PDO, and can also vary the amount of power supplied while the imaging device 100 is in operation. In this embodiment, PPS is adopted as the power supply mode for the power supply device 120.

[0018] As described above, the power receiving circuit 204 includes a voltage conversion circuit 205 and a communication interface 206. When power is supplied from the power supply device 120, a voltage is applied to the voltage conversion circuit 205 from the power supply circuit 211 of the power supply device 120 via the VBUS terminal of the USB connector 203. The voltage conversion circuit 205 converts the voltage applied from the power supply circuit 211 into a system voltage of the imaging device 100 and applies the system voltage to the power supply circuit 109. The power supply circuit 109 converts the system voltage applied from the voltage conversion circuit 205 into a voltage usable by each component such as the processor 103. The communication interface 206 is connected to the communication interface 212 of the power supply device 120 via the CC terminal of the USB connector 203. Under the control of the processor 103, the communication interface 206 adjusts the value of the voltage applied from the power supply device 120 to the imaging device 100, etc. In a power supply compliant with the USB PD standard, the power supply circuit 211 of the power supply device 120 can supply, for example, power ranging from 10 W (5 V, 2 A) to 100 W (20 V, 5 A) to the voltage conversion circuit 205 of the imaging device 100 via the VBUS terminal.

[0019] Next, a process up to the start of power supply conforming to the USB PD standard will be described. When the imaging device 100 is connected to the power supply device 120 via the USB cable 202, the voltage of the CC terminal, which is determined by a pull-down resistor (not shown) in the imaging device 100 and a pull-up resistor (not shown) in the power supply device 120, is detected. The processor 103 of the imaging device 100 determines, based on the voltage of the CC terminal, whether the power supply device 120 is a device that supplies standard power (e.g., 5 V, 500 mA) conforming to the USB PD standard. If the processor 103 determines that the power supply device 120 is a device that supplies standard power, the processor 103 starts up the imaging device 100 with the standard power conforming to the USB PD standard. The processor 103 of the imaging device 100 exchanges information regarding power supply conforming to the USB PD standard with the power supply device 120 via the CC terminal, and sets a combination of a voltage value (applied voltage value) and a current value that can supply the power. Furthermore, during this setting, for example, the processor 103 of the imaging device 100 requests a power supply capacity (a combination of a voltage value and a current value that can supply power) that complies with the USB PD standard from the processor 213 of the power supply device 120. In response to the request from the imaging device 100, the processor 213 of the power supply device 120 replies with a power supply capacity that complies with the USB PD standard.

[0020] The processor 103 of the imaging device 100 determines whether or not a combination of a desired voltage value and a desired current value is found among the power supply capacities returned from the power supply device 120. That is, the processor 103 (determining means) determines whether or not the power supply device 120 can determine the voltage value and the current value to be applied to the imaging device 100 (determining step). If the processor 103 determines that a combination of a desired voltage value and a desired current value is found as a result of this determination, the processor 103 performs the following process. This process is a process of transmitting voltage and current information (supply power setting information) related to the combination of the voltage value and the current value to the communication interface 212 of the power supply device 120 via the communication interface 208. This allows the processor 103 (instructing means) to instruct the power supply device 120 to supply power based on the voltage and current information (instructing step). Furthermore, the power supply device 120 receives the voltage and current information via the communication interface 212. Based on the voltage and current information, the processor 213 of the power supply device 120 performs a step-up process to increase the voltage or a step-down process to decrease the voltage in the power supply circuit 211. The processor 213 of the power supply device 120 supplies the desired power obtained by combining the voltage value and current value to the image capture device 100 via the VBUS terminal. This enables the image capture device 100 to operate as a system after starting up with standard power. Note that if the processor 103 determines whether or not the desired combination of voltage value and current value exists, and determines that the combination does not exist, the processor 103 stops supplying power in accordance with the USB PD standard.

[0021] As described above, the imaging device 100 can set a voltage value required for supplying power in compliance with the USB PD standard through communication with the power supply device 120. The voltage value is not particularly limited and can be, for example, 5V, 9V, 12V, 15V, 20V, etc. The voltage conversion circuit 205 converts the power applied from the power supply device 120 into a system voltage required for system operation. For example, if the imaging device 100 uses a two-cell lithium-ion battery as the power source for the battery 110, the voltage conversion circuit 205 generally converts the power to a system voltage of approximately 8.4V. For example, if the imaging device 100 uses a four-cell lithium-ion battery as the power source for the battery 110, the voltage conversion circuit 205 generally converts the power to a system voltage of approximately 16.8V.

[0022] As shown in FIG. 2, the voltage conversion circuit 205 includes a boost circuit 205a and a step-down circuit 205b. The boost circuit 205a performs a step-up process to increase the voltage, and the step-down circuit 205b performs a step-down process to decrease the voltage. Both the boost circuit 205a and the step-down circuit 205b convert (change) voltage, but generally, the boost circuit 205a tends to have a larger voltage conversion loss when converting voltage than the step-down circuit 205b. The voltage conversion circuit 205 including the boost circuit 205a and the step-down circuit 205b operates by switching between step-up and step-down modes depending on the input voltage or load current. Furthermore, the greater the voltage difference between the input voltage and the output voltage of the voltage conversion circuit 205, the greater the voltage conversion loss, i.e., the worse the voltage conversion efficiency. The voltage conversion circuit 205 generates heat due to the voltage conversion loss. Therefore, if the voltage conversion loss increases, the temperature inside the imaging device 100 may rise, potentially causing the processor 103, the image sensor 102, and the like to stop operating. The voltage conversion circuit 205 can reduce the voltage conversion loss by receiving a voltage from the power supply device 120 that is as close as possible to the system voltage but higher than the system voltage. However, if the applied voltage is set to minimize the voltage conversion loss in the voltage conversion circuit 205, the functionality of the power supply device 120 may be limited, potentially reducing the versatility of the power supply device 120. Furthermore, when the operation mode of the imaging device 100 is changed, a waiting time may occur until the applied voltage value appropriate for that operation mode is reached. As a result, for example, there may be a period of time when the device is unavailable for operation, or the state of the changed operation mode may be reflected with a delay, causing the user to wait for an operation.

[0023] Therefore, the imaging device 100 is configured to reduce such a phenomenon. The configuration and operation will be described below. FIG. 3 is a flowchart showing processing executed by the imaging device. As shown in FIG. 3, in step S301, the processor 103 of the imaging device 100 determines whether a setting screen for an imaging mode (hereinafter, simply referred to as a "setting screen") is displayed on the display panel 107. As described above, the imaging device 100 can be set to a plurality of operating modes. The "setting screen for an imaging mode" refers to a setting screen on which, for example, operating conditions for each imaging mode can be set. The setting screen is displayed by operating the UI unit 106. If the processor 103 determines in step S301 that the setting screen is displayed, the process proceeds to step S302. On the other hand, if the processor 103 determines in step S301 that the setting screen is not displayed, the process remains in standby at step S301.

[0024] In step S302, the processor 103 issues a first instruction to the power supply device 120 to temporarily increase the voltage value applied from the power supply device 120 to a first applied voltage value. The first applied voltage value is not particularly limited, and is preferably set to, for example, the maximum applied voltage value (maximum voltage value) that can be applied by the power supply device 120. Note that the first instruction is transmitted from the communication interface 206 of the USB unit 108 of the imaging device 100 to the communication interface 212 of the power supply device 120 via CC communication. Then, when the processor 213 of the power supply device 120 receives the first instruction, it increases the voltage value in the power supply circuit 211 to the first applied voltage value and waits in that state, i.e., maintains the state as it is.

[0025] In step S303, processor 103 determines whether an operation to change the contents of various items (excluding the operating condition items) on the setting screen has been performed, that is, whether or not a change operation (user operation) to change the contents of various items on the setting screen has been performed. If processor 103 determines that a change operation has been performed as a result of the determination in step S303, the process proceeds to step S304. On the other hand, if processor 103 determines that a change operation has not been performed as a result of the determination in step S303, the process remains in standby at step S303.

[0026] In step S304, processor 103 determines whether an operation to change the operating conditions on the setting screen has been performed, i.e., whether or not a change operation to change the operating conditions on the setting screen has been performed. If processor 103 determines that a change operation has been performed as a result of the determination in step S304, the process proceeds to step S305. On the other hand, if processor 103 determines that a change operation has not been performed as a result of the determination in step S304, the process proceeds to step S308.

[0027] In step S305, processor 103 (detection means) detects the contents of all items, including items whose contents have not been changed on the setting screen and items whose contents have been changed, regardless of whether the contents have been changed on the setting screen. Note that processor 103 is not limited to detecting the contents of all items, and it is sufficient to detect the contents of at least items that have been changed on the setting screen.

[0028] In step S306, the processor 103 calculates the power consumption value that will be consumed by the imaging device 100 when the imaging device 100 operates under conditions that satisfy the contents of all the items detected in step S305. This allows the processor 103 (acquisition means) to acquire the power consumption value corresponding to each operation mode. Note that the calculation in step S306 is performed based on power consumption information pre-stored in the memory 104. The power consumption information is stored for each setting (menu tag).

[0029] In step S307, the processor 103 determines the second applied voltage value to be applied by the power supply device 120 based on the power consumption value acquired in step S306. The second applied voltage value is equal to or less than the first applied voltage value. This second applied voltage value is not particularly limited, and is preferably set to a value higher than the voltage value obtained by dividing the power consumption value acquired in step S306 by the current value in the power-on state of the imaging device 100 that results in the power consumption value. In this case, the second applied voltage value is preferably set to a value 10% to 50% higher, and more preferably 20% to 30% higher, than the voltage value obtained by dividing the power consumption value. Note that the operating conditions may be changed multiple times. In this case, it is preferable to add up the power consumption values each time the operating conditions are changed and determine the second applied voltage value based on the added power consumption value. This prevents the second applied voltage value from being determined each time a power consumption value is acquired, thereby shortening the time required to determine the second applied voltage value when the operating conditions are changed multiple times. Furthermore, the second applied voltage value does not necessarily have to be obtained by calculation, but may be obtained, for example, from a table or graph showing the relationship between the power consumption value and the second applied voltage value. This allows the second applied voltage value to be obtained more quickly than by calculation. It is preferable that such a table or graph be stored in memory 104 in advance.

[0030] In step S309, the processor 103 determines whether the display of the setting screen on the display panel 107 has ended. This determination will be described with reference to FIG. 4. FIG. 4 is a diagram illustrating an example of transition of screens displayed on the display panel of the imaging device. A screen 401 shown in FIG. 4(a) is an example of an image of one frame of a moving image. A screen 402 shown in FIG. 4(b) is a setting screen switched from the screen 401. The screen 402 includes operating conditions in a moving image mode for capturing moving images. The operating conditions include, for example, a frame rate, a resolution, and an output format. A screen 403 shown in FIG. 4(c) is a setting screen showing a state in which at least one of the operating conditions of the screen 402 has been changed. The frame rate, the resolution, and the output format of the screen 403 have been changed compared to the screen 402. Whether the display of the setting screen has ended is determined based on whether the screen 402 has been closed and transitioned to the screen 401, or whether the screen 403 has been closed and transitioned to the screen 401. As a result, if the screen has transitioned to screen 401, it is determined that the display of the setting screen has ended, and if the screen has not transitioned to screen 401, it is determined that the display of the setting screen has not ended. Then, if the processor 103 determines in step S309 that the display of the setting screen has ended, the process proceeds to step S310. On the other hand, if the processor 103 determines in step S309 that the display of the setting screen has not ended, the process returns to step S303, and the subsequent steps are executed in order. Also, in step S309, the processor 103 transmits the second applied voltage value determined in step S307 to the voltage control unit 201.

[0031] In step S310, the processor 103 issues a second instruction to the power supply device 120 to change the first applied voltage value to a second applied voltage value and supply power at the second applied voltage value. The second instruction is transmitted via CC communication from the voltage control unit 201 of the imaging device 100 to the communication interface 212 of the power supply device 120 via the communication interface 206 of the USB unit 108. Upon receiving the second instruction, the processor 213 of the power supply device 120 changes the voltage value in the power supply circuit 211 from the first applied voltage value to the second applied voltage value and supplies power at the second applied voltage value. After step S310 is executed, the processing ends.

[0032] In step S308 after executing step S304, the processor 103 determines to maintain the voltage value in the power supply circuit 211 as it is without changing it to the second applied voltage value, and the process proceeds to step S309. If the process proceeds to step S309 and then step S310, in step S310, the processor 103 issues a third instruction to the power supply device 120 to instruct it to supply power at the original voltage value determined in step S308. Note that the third instruction is transmitted from the communication interface 206 of the USB unit 108 of the imaging apparatus 100 to the communication interface 212 of the power supply device 120 via CC communication. Then, upon receiving the third instruction, the processor 213 of the power supply device 120 returns the voltage value in the power supply circuit 211 from the first applied voltage value to the original voltage value, and supplies power at this voltage value.

[0033] With the above-described control, the imaging device 100 can use, i.e., connect, a versatile power supply device 120 regardless of the functions of the power supply device 120, as long as the power supply device 120 is capable of supplying a minimum amount of power to the imaging device 100. Furthermore, when changing the operation mode of the imaging device 100, for example, the imaging device 100 can instruct the power supply device 120 to first increase the applied voltage to a first applied voltage value (maximum applied voltage value) and then change the applied voltage to a second applied voltage value equal to or lower than the first applied voltage value. This allows the power supply device 120 to quickly supply power to the imaging device 100 at the second applied voltage value. This power supply can minimize the waiting time until the applied voltage value reaches a value appropriate for the changed operation mode, i.e., the waiting time during which the user is unable to operate the imaging device 100.

[0034] Second Embodiment 5 and 6, the second embodiment will be described below, focusing on differences from the previous embodiment, and similar points will not be described again. In the first embodiment, when the setting screen is displayed, the voltage value to be applied from the power supply device 120 is temporarily increased to a first applied voltage value (maximum applied voltage value). The voltage transition time until this increase is completed varies depending on various conditions, such as the voltage value before the increase and the type of power supply device 120. Therefore, in the first embodiment, if the voltage transition time is relatively long and the operation mode setting is changed immediately, a power shortage may occur.

[0035] 5 is a block diagram showing an example of a hardware configuration when the electronic device according to the second embodiment is applied to an imaging device. As shown in FIG. 5, the imaging device 100 further includes a voltage detection unit 501 provided in the USB unit 108. The voltage detection unit 501 is disposed on a line having a VBUS terminal, and can communicate with the processor 103 via the communication interface 206 on a line having a CC terminal. In this way, the voltage detection unit 501 is controlled by the processor 103.

[0036] Fig. 6 is a flowchart showing processing executed by the imaging device. As shown in Fig. 6, in step S601, similar to step S301, the processor 103 of the imaging device 100 determines whether or not a setting screen is displayed on the display panel 107. If the processor 103 determines in step S601 that the setting screen is displayed, the processing proceeds to step S602. On the other hand, if the processor 103 determines in step S601 that the setting screen is not displayed, the processing remains in step S601 and waits.

[0037] In step S602, the processor 103 determines whether the operating mode set on the setting screen is a mode in which power consumption varies. The mode in which power consumption varies is not particularly limited, and may be, for example, a video mode for shooting video. If the processor 103 determines in step S602 that the mode is a mode in which power consumption varies, the process proceeds to step S603. On the other hand, if the processor 103 determines in step S602 that the mode is not a mode in which power consumption varies, the process remains in step S602 and waits.

[0038] After step S602 is executed, steps S603 to S610 can be executed, which are the same as steps S302 to S309, respectively.

[0039] In step S611 after executing step S610, the processor 103 determines whether the VBUS voltage value is equal to or greater than the voltage value determined in step S608 or step S609. The "VBUS voltage value" refers to the voltage value that the power supply device 120 can apply to the imaging device 100 when the second applied voltage value is determined. The determination in step S611 is made possible by the processor 103 controlling the voltage detection unit 501. The voltage detection unit 501 is configured to be able to detect the VBUS voltage value. This allows the processor 103 to compare the second applied voltage value with the VBUS voltage value detected by the voltage detection unit 501 and determine whether the VBUS voltage value is equal to or greater than the determined voltage value. If the processor 103 determines in step S611 that the VBUS voltage value is equal to or greater than the determined voltage value, the process proceeds to step S612. On the other hand, if the processor 103 determines in step S611 that the VBUS voltage value is not equal to or greater than the determined voltage value, the process remains in standby at step S611. By performing step S611 in this manner, it is possible to prevent power shortages from occurring even if the operating mode setting is changed immediately when the voltage transition time is relatively long.

[0040] In step S612, similarly to step S310, the processor 103 issues a power supply instruction to the power supply device 120, and the process ends.

[0041] Although preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments and various modifications and alterations are possible within the spirit and scope of the present invention. The present invention can also be realized by supplying a program that realizes one or more functions of the above-described embodiments to a system or device via a network or a storage medium, and having one or more processors in the computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., an ASIC) that realizes one or more functions. Furthermore, in the above-described embodiments, a digital video camera suitable for capturing moving images is used as an applicable device for the electronic device, but this is not limited thereto and a digital camera suitable for capturing still images may also be used. Furthermore, other applicable devices for the electronic device may include, for example, information processing devices such as desktop or notebook personal computers, tablet terminals, and smartphones.

[0042] The disclosure of each embodiment includes the following configurations, methods, and programs. (Configuration 1) An electronic device that is connected to a power supply device capable of supplying power compliant with the USB PD standard and receives power from the power supply device, a display means for displaying a setting screen on which the operating conditions of the electronic device can be set; a determination unit that determines an applied voltage value to be applied to the electronic device by the power supply device when the power is supplied; an instruction unit that instructs the power supply device to supply the power at the applied voltage value determined by the determination unit, the instruction means, when the setting screen is displayed on the display means, issues a first instruction to the power supply device to increase the applied voltage value to a first applied voltage value; when the first instruction is given and the operating condition is changed on the setting screen, the determination means determines the applied voltage value to be a second applied voltage value in accordance with the operating condition; The electronic device is characterized in that the instruction means issues a second instruction to the power supply device to change the first applied voltage value to the second applied voltage value and supply the power at the second applied voltage value. (Configuration 2) An acquisition unit is provided for acquiring a power consumption value consumed by the electronic device according to the operating conditions, The electronic device described in configuration 1 is characterized in that, when the first instruction is given and the operating conditions are changed on the setting screen, the determination means determines the applied voltage value to the second applied voltage value based on the power consumption value corresponding to the operating conditions. (Configuration 3) The electronic device described in Configuration 2, wherein the determination means determines the second applied voltage value to be a value higher than the voltage value obtained by dividing the power consumption value by the current value in the powered state of the electronic device when the power consumption value is reached. (Configuration 4) There are a plurality of types of operating conditions, a storage means for storing in advance the power consumption value for each of the operating conditions; The electronic device according to configuration 2, wherein the acquisition means adds up the power consumption values each time the operating conditions are changed, and determines the second applied voltage value based on the power consumption values. (Configuration 5) A storage means is provided in which a table or a graph showing the relationship between the power consumption value and the second applied voltage value is stored in advance, 3. The electronic device according to configuration 2, wherein the determining means determines the second applied voltage value based on the table or the graph. (Configuration 6) A detection means for detecting a change in the operating conditions on the setting screen is provided, 6. The electronic device according to any one of configurations 1 to 5, wherein the determining means determines the second applied voltage value when the detecting means detects a change in the operating conditions. (Configuration 7) The electronic device described in any one of configurations 1 to 6, characterized in that the decision means decides to maintain the applied voltage value as it is without changing it to the second applied voltage value when the first instruction is given but the operating conditions are not changed on the setting screen. (Configuration 8) The electronic device according to configuration 7, wherein the instruction means issues a third instruction to the power supply device to instruct the power supply device to supply the power at the applied voltage value determined to be maintained by the determination means. (Configuration 9) The electronic device according to any one of configurations 1 to 8, wherein the instruction means sets the first applied voltage value when issuing the first instruction to a maximum voltage value that can be applied by the power supply device. (Configuration 10) The electronic device according to any one of configurations 1 to 9, wherein the instruction means issues the second instruction when the display of the setting screen on the display means has ended. (Configuration 11) A storage means is provided in which the power consumption value is stored in advance, 3. The electronic device according to configuration 2, wherein the acquisition means acquires the power consumption value from the storage means. (Configuration 12) A comparison unit is provided that compares the second applied voltage value determined by the determination unit with a voltage value that the power supply device can apply to the electronic device when the second applied voltage value is determined, 12. The electronic device according to any one of configurations 1 to 11, wherein, when the comparison result by the comparison means shows that the second applied voltage value is smaller, the instruction means issues the second instruction. (Configuration 13) The electronic device according to any one of configurations 1 to 12, characterized in that it is an imaging device capable of capturing moving images. (Method 1) A method for controlling an electronic device that is connected to a power supply device capable of supplying power compliant with the USB PD standard and receives power from the power supply device, comprising: a display step of displaying a setting screen on which operating conditions of the electronic device can be set; a determination step of determining an applied voltage value to be applied to the electronic device by the power supply device when the power is supplied; an instruction step of instructing the power supply equipment to supply the power at the applied voltage value determined in the determination step, In the instructing step, when the setting screen is displayed in the displaying step, a first instruction is given to the power supply device to increase the applied voltage value to a first applied voltage value; In the determination step, when the first instruction is given and the operating condition is changed on the setting screen, the applied voltage value is determined to be a second applied voltage value in accordance with the operating condition; a second instruction to the power supply device to change the first applied voltage value to the second applied voltage value and to supply the power at the second applied voltage value, (Program 1) A program for causing a computer to execute each means of the electronic device described in any one of configurations 1 to 13. [Explanation of symbols]

[0043] 100 Imaging device 103 processors 108 USB section 120 Power Supply Device 201 Voltage control section 204 Receiving circuit 205 Voltage conversion circuit 211 Power supply circuit 213 processors

Claims

1. An electronic device that is connected to a power supply device that can supply power conforming to the USB PD standard and receives power from the power supply device, a display means for displaying a setting screen on which the operating conditions of the electronic device can be set; a determination unit that determines an applied voltage value to be applied to the electronic device by the power supply device when the power is supplied; an instruction unit that instructs the power supply device to supply the power at the applied voltage value determined by the determination unit, the instruction means, when the setting screen is displayed on the display means, issues a first instruction to the power supply device to increase the applied voltage value to a first applied voltage value; when the first instruction is given and the operating condition is changed on the setting screen, the determining means determines the applied voltage value to be a second applied voltage value in accordance with the operating condition; The electronic device is characterized in that the instruction means issues a second instruction to the power supply device to change the first applied voltage value to the second applied voltage value and supply the power at the second applied voltage value.

2. an acquisition unit for acquiring a power consumption value consumed by the electronic device according to the operating conditions; 2. The electronic device according to claim 1, wherein when the first instruction is given and the operating conditions are changed on the setting screen, the determination means determines the applied voltage value to be the second applied voltage value based on the power consumption value corresponding to the operating conditions.

3. The electronic device according to claim 2, characterized in that the determining means determines the second applied voltage value to be a value higher than a voltage value obtained by dividing the power consumption value by a current value in an energized state of the electronic device when the power consumption value is reached.

4. There are a plurality of types of operating conditions, a storage means for storing in advance the power consumption value for each of the operating conditions; 3. The electronic device according to claim 2, wherein the acquisition unit adds up the power consumption values each time the operating conditions are changed, and determines the second applied voltage value based on the power consumption values.

5. a storage means for storing in advance a table or a graph showing the relationship between the power consumption value and the second applied voltage value; 3. The electronic device according to claim 2, wherein the determining unit determines the second applied voltage value based on the table or the graph.

6. a detection means for detecting a change in the operating conditions on the setting screen; 2. The electronic device according to claim 1, wherein the determining means determines the second applied voltage value when the detecting means detects a change in the operating conditions.

7. 2. The electronic device according to claim 1, wherein the determining means determines to maintain the applied voltage value as it is without changing it to the second applied voltage value when the first instruction is given but the operating conditions are not changed on the setting screen.

8. 8. The electronic device according to claim 7, wherein the instruction unit issues a third instruction to the power supply device to supply the power at the applied voltage value determined to be maintained by the determination unit.

9. 2. The electronic device according to claim 1, wherein the instruction unit sets the first applied voltage value when issuing the first instruction to a maximum voltage value that can be applied by the power supply device.

10. 2. The electronic device according to claim 1, wherein the instruction means issues the second instruction when the display of the setting screen on the display means has ended.

11. a storage means for storing the power consumption value in advance; 3. The electronic device according to claim 2, wherein the acquisition unit acquires the power consumption value from the storage unit.

12. a comparison means for comparing the second applied voltage value determined by the determination means with a voltage value that can be applied to the electronic device by the power supply device when the second applied voltage value is determined, 2. The electronic device according to claim 1, wherein the instruction means issues the second instruction when the second applied voltage value is smaller as a result of the comparison by the comparison means.

13. 2. The electronic device according to claim 1, wherein the electronic device is an imaging device capable of capturing moving images.

14. A method for controlling an electronic device that is connected to a power supply device capable of supplying power compliant with the USB PD standard and receives power from the power supply device, comprising: a display step of displaying a setting screen on which operating conditions of the electronic device can be set; a determination step of determining an applied voltage value to be applied to the electronic device by the power supply device when the power is supplied; an instruction step of instructing the power supply equipment to supply the power at the applied voltage value determined in the determination step, In the instructing step, when the setting screen is displayed in the displaying step, a first instruction is given to the power supply device to increase the applied voltage value to a first applied voltage value; In the determination step, when the first instruction is given and the operating condition is changed on the setting screen, the applied voltage value is determined to be a second applied voltage value in accordance with the operating condition; a second instruction to the power supply device to change the first applied voltage value to the second applied voltage value and to supply the power at the second applied voltage value,

15. A program for causing a computer to execute each means of the electronic device according to claim 1.

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