Electronic apparatus, control method, and program

Abstract

To achieve a technique that allows a user to recognize the difference in the accuracy and reliability between pieces of information on the remaining amount of power that can be supplied from a power supply apparatus.SOLUTION: An electronic apparatus operates with power received from a power supply apparatus, and has: connection means that connects to the power supply apparatus; and control means that acquires first remaining amount information on power that can be supplied from the power supply apparatus, and on the basis of the first remaining amount information, calculates and displays second remaining amount information on power that allows the electronic apparatus to operate. The control means switches the display accuracy of the second remaining amount information on the basis of the reliability of the first remaining amount information acquired from the power supply apparatus.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to display control of remaining operable time of an electronic device. [Background technology]

[0002] The USB (Universal Serial Bus) PD (Power Delivery) standard is a standard that enables power supply by connecting a power supply device and a power receiving device with a USB Type-C connector and cable. In the USB PD standard, the power supply device (source device) and the power receiving device (sink device) communicate (CC communication) via the CC (configuration channel) terminal of the USB Type-C connector to detect the connection between the devices, arbitrate power supply and reception, and exchange information such as the remaining battery level.

[0003] The power supply device is a mobile battery, etc., and the power receiving device is a digital camera, etc. The power receiving device operates with the power supplied from the power supply device connected via a USB Type-C connector. The power receiving device calculates and displays information such as the operating time with the power supplied from the power supply device based on the remaining battery level information obtained from the power supply device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4090373 [Patent Document 2] International Publication No. 2001 / 06329 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the accuracy and reliability of the remaining battery information acquired from the power supply device differs depending on the revision of the communication standard with the power supply device, and therefore the accuracy and reliability of the information such as the operable time of the power receiving device calculated from the remaining battery information acquired from the power supply device also differs. In this way, if the accuracy of the information such as the remaining battery time calculated by the power receiving device is the same when displaying the information, even though the accuracy and reliability of the remaining battery information acquired from the power supply device differs, the user cannot recognize the difference in the accuracy and reliability of the information such as the remaining battery time, and therefore cannot make appropriate preparations.

[0006] The present invention has been made in consideration of the above-mentioned problems, and its purpose is to realize a technology that allows a user to recognize differences in accuracy and reliability of information on the remaining amount of power that can be supplied from a power supplying device when the power supplying device is connected to a power receiving device. [Means for solving the problem]

[0007] In order to solve the above problems and achieve the object, the present invention provides an electronic device that operates using power received from a power supplying device, comprising a connection means for connecting to the power supplying device, and a control means for acquiring first remaining information regarding the power that can be supplied from the power supplying device, and calculating and displaying second remaining information regarding the power at which the electronic device can operate based on the first remaining information, wherein the control means switches the display accuracy of the second remaining information based on the reliability of the first remaining information acquired from the power supplying device. Effect of the Invention

[0008] According to the present invention, a user can recognize differences in accuracy and reliability of information on the remaining amount of power that can be supplied from a power supply device. [Brief description of the drawings]

[0009] [Figure 1] FIG. 2 is a block diagram showing a hardware configuration of a power receiving device according to the embodiment. [Diagram 2] FIG. 2 is a block diagram showing a detailed hardware configuration of a power receiving device and a power supply device according to the embodiment. [Diagram 3]FIG. 2 is a functional block diagram of a display control unit according to the embodiment. [Figure 4] 6A and 6B are diagrams showing examples of display of available operation time in the power receiving device according to the embodiment; [Diagram 5] 4 is a flowchart showing a display control process according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, the embodiments will be described in detail with reference to the attached drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the attached drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0011] In this embodiment, the power receiving device acquires first remaining amount information on the power that can be supplied from the power supply device, and calculates and displays second remaining amount information on the power that allows the power receiving device to operate based on the first remaining amount information. At this time, the power receiving device switches the display accuracy of the second remaining amount information based on the reliability of the first remaining amount information acquired from the power supply device. This allows the user to recognize the difference in reliability between the first remaining amount information acquired from the power supply device and the second remaining amount information calculated from the first remaining amount information, and to make appropriate preparations, thereby reducing situations in which operation is unintentionally restricted. Appropriate preparations include preparing a replacement mobile battery, changing the operation mode of the power receiving device to a low power consumption mode, etc.

[0012] In this embodiment, an example will be described in which the electronic device is applied to an imaging device such as a digital camera capable of capturing still images and videos. Note that the imaging device may be a smartphone, a tablet, an industrial camera, a medical camera, or the like, as long as it is capable of operating as a digital camera.

[0013] First, the configurations and functions of the power supply device and the power receiving device of the present embodiment will be described with reference to FIG. 1 to FIG.

[0014] FIG. 1 is a block diagram showing a hardware configuration of a power receiving device according to the present embodiment.

[0015] The power receiving device in this embodiment is an imaging device 100 .

[0016] The control unit 101 has a processor (CPU) that performs arithmetic processing and control processing of the imaging device 100 , and controls each component of the imaging device 100 by executing a control program stored in a non-volatile memory 103 .

[0017] The volatile memory 102 is a RAM. Constants and variables for the operation of the control unit 101, control programs read from the non-volatile memory 103, and the like are loaded into the volatile memory 102. Furthermore, the volatile memory 102 stores image data received from an external device via the connection unit 107 and image data acquired by the imaging unit 110.

[0018] The non-volatile memory 103 is an electrically erasable and recordable EEPROM, flash memory, etc. Constants and control programs for the operation of the control unit 101 are stored in the non-volatile memory 103. The non-volatile memory 103 also stores information about power consumption according to the operation mode of the imaging device 100, a reference table for determining the revision of the communication standard for communicating with an external device, etc.

[0019] The operation unit 104 is an operation member such as various switches, buttons, a touch panel, etc. that receives various operations from a user and notifies the control unit 101. In addition, the operation unit 104 provides a user interface for the user to operate the imaging device 100.

[0020] The display unit 105 displays a live view image, a captured image, text for interactive operation, and an operation mode of the imaging device 100. The display unit 105 also displays the remaining capacity information of the battery 120 mounted in the imaging device 100 and the remaining capacity information of the battery 214 of the power supply device 200 connected to the imaging device 100, based on the remaining capacity information. The display unit 105 is, for example, a display device such as a liquid crystal display or an organic EL display. The display unit 105 may be integrated with the imaging device 100, or may be an external device connected to the imaging device 100.

[0021] The recording medium 106 is a memory card, a hard disk, or the like, on which data can be written and read by the control unit 101. Image files, control programs, and the like are recorded on the recording medium 106.

[0022] The connection unit 107 is an interface for connecting to an external device such as the power supply device 200 of this embodiment. The imaging device 100 is connected to the external device via the connection unit 107 so as to be able to communicate with the external device and supply power thereto. The connection unit 107 is an interface that complies with, for example, the Universal Serial Bus (USB) standard, more specifically, the USB Type-C standard and the USB PD (Power Delivery) standard. The imaging device 100 can communicate with and receive power from the external device in accordance with the USB PD standard by controlling the connection unit 107.

[0023] Note that the connection unit 107 is not limited to an interface conforming to the USB standard, and may be an interface capable of communication and power reception in other formats.

[0024] The power supply device 200 of the present embodiment is a charger for a mobile battery or the like, and has a communication function and a power supply function that comply with the USB (Universal Serial Bus) standard, more specifically, the USB Type-C standard and the USB PD standard. Note that the power supply device 200 is not limited to a mobile battery, and may be a personal computer (PC) or the like that includes a rechargeable battery.

[0025] The power supply circuit 108 is capable of receiving power from a battery 120 attached to the image capture device 100 and charging the battery 120. The battery 120 is a primary battery such as an alkaline battery or a lithium battery, or a rechargeable secondary battery such as a NiCd battery, a NiMH battery, or a lithium ion battery. The battery 120 is detachable from the image capture device 100 and is capable of supplying power to the image capture device 100.

[0026] Furthermore, the power supply circuit 108 converts the voltage of the power supplied from the battery 120 or the power supply device 200 via the connection unit 107 into a voltage at which each component of the imaging device 100 can operate.

[0027] The photographing lens (lens unit) 109 includes a group of lenses (not shown) including a zoom lens, a focus lens, etc., a lens drive unit (not shown), an aperture (not shown), etc., and forms an optical image of a subject on an imaging surface of an imaging unit 110.

[0028] The imaging unit 110 has an image sensor configured with a CCD (charge-coupled device), a CMOS (complementary metal-oxide semiconductor) element, or the like, and converts an optical image of a subject into an electrical signal.

[0029] The control unit 101 performs various image processing on image data captured by the imaging unit 110, generates image files such as still images and videos, and displays them on the display unit 105 or records them on the recording medium 106. The control unit 101 also performs predetermined calculation processing using the image data captured by the imaging unit 110, and performs exposure control and distance measurement control based on the calculation results.

[0030] Next, a connection configuration between the imaging device 100 and the power supply device 200 will be described with reference to FIG.

[0031] The imaging device 100 is physically and electrically connected to the power supply device 200 via a USB Type-C cable 220, enabling communication and power reception.

[0032] The control unit 101 has a display control unit 300 that controls the display of the second remaining amount information of this embodiment. A detailed configuration of the display control unit 300 will be described later with reference to FIG.

[0033] The connection unit 107 has a USB connector 201, a VBUS power receiving circuit 202, and a CC communication interface circuit 203. The USB connector 201 and a USB connector 211 (described later) are USB Type-C connectors to which a USB Type-C cable 220 can be connected. The USB Type-C connector includes a D+ / D- terminal and a SS+ / SS- terminal of a data communication line, a GND terminal for a GND signal (not shown), a VBUS terminal of a power supply line, and a CC (configuration channel) terminal. The CC terminal is a terminal that complies with the USB Type-C standard and the USB PD standard.

[0034] The VBUS power receiving circuit 202 is configured with a DC-DC converter and the like that converts the VBUS voltage supplied from the power supply device 200 into the voltage of the system power supply of the imaging device 100. The power supply circuit 108 supplies the power voltage converted by the VBUS power receiving circuit 202 to each unit of the imaging device 100. The imaging device 100 operates with the power supplied from the power supply circuit 108. The CC communication interface circuit 203 is connected to a CC communication interface circuit 213 of the power supply device 200 via a CC terminal of the USB connector 201, and is configured with a dedicated IC for CC communication and the like.

[0035] The power supply device 200 is a mobile battery that complies with the USB Type-C standard and the USB PD standard. The power supply device 200 includes a USB connector 211, a VBUS power supply circuit 212, a CC communication interface circuit 213, a battery 214, and a control unit 215.

[0036] The VBUS power supply circuit 212 is configured with a DC-DC converter and the like that generates a VBUS voltage from the electromotive force of the battery 214 of the power supply device 200. The battery 214 is built-in to supply power for operating the power supply device 200 and is configured with a lithium ion battery or the like. The USB connector 211 and the CC communication interface circuit 213 are similar to the USB connector 201 and the CC communication interface circuit 203, respectively.

[0037] The control unit 215 has a processor (CPU) and a memory that performs arithmetic processing and control processing of the power supply device 200, and controls each component of the power supply device 200 by executing a control program stored in the memory.

[0038] The control unit 215 negotiates power supply in accordance with the USB PD standard with the imaging device 100, and transmits and receives power supply information of the power supply device 200 and remaining amount information of the battery 214, via the CC communication interface circuit 213. In this embodiment, the remaining amount information of the battery 214 corresponds to first remaining amount information related to the power that can be supplied from the power supply device 200.

[0039] Next, the configuration of the display control unit 300 of the control unit 101 of this embodiment will be described with reference to FIG.

[0040] Each function of the display control unit 300 is configured with hardware and / or software. When each functional unit shown in FIG. 3 is configured with hardware instead of software, it is sufficient to have a circuit configuration corresponding to each functional unit in FIG.

[0041] The display control unit 300 includes a serial communication unit 301 , a communication standard determination unit 302 , a display precision switching unit 303 , a remaining amount information calculation unit 304 , and a display data generation unit 305 .

[0042] The serial communication unit 301 is configured with a serial communication circuit such as I2C, and is connected to the CC communication interface circuit 203. The serial communication unit 301 acquires remaining amount information of the battery 214 from the power supply equipment 200 via the CC communication interface circuit 203.

[0043] The communication standard determination unit 302 determines the revision of the communication standard of the CC communication interface circuit 203 via the serial communication unit 301, and determines the reliability of the remaining capacity information of the battery 214 based on the revision of the communication standard. The revision of the communication standard can be determined from the version information of the communication standard, and the reliability of the remaining capacity information of the battery 214 is determined, for example, by referring to a table stored in the non-volatile memory 103 for evaluating the reliability of the remaining capacity information of the battery 214 for each revision of the communication standard.

[0044] The display accuracy switching unit 303 switches the display accuracy of the second remaining amount information generated by the display data generating unit 305, which will be described later, according to the determination result by the communication standard determination unit 302. In this embodiment, the operable time of the imaging device 100 calculated based on the remaining amount information of the battery 214 corresponds to the second remaining amount information.

[0045] In the following description, the remaining amount information of the battery 214 of the power supply equipment 200 is referred to as first remaining amount information, and the operable time of the imaging device 100 calculated based on the remaining amount information of the battery 214 is referred to as second remaining amount information.

[0046] The remaining amount information calculation unit 304 calculates second remaining amount information based on the first remaining amount information acquired from the power supply device 200 by the serial communication unit 301 and the power consumption of the imaging device 100. The display data generation unit 305 generates display data to be output to the display unit 105 based on the second remaining amount information calculated by the remaining amount information calculation unit 304.

[0047] Next, a method for calculating the second remaining amount information based on the first remaining amount information acquired from the power supply equipment 200 and the power consumption of the imaging device 100 will be described.

[0048] The calculated operable time T [min], which is the second remaining information, can be calculated using the following equation 1, with the first remaining information C [mAh], the current consumption I [mA] of the imaging device 100, the margin capacity M [mAh], and the correction coefficient K as parameters. (Formula 1) T = (CM) x K / I x 60 Next, with reference to FIG. 4, a display form of the second remaining amount information in which the display accuracy is switched depending on the reliability of the first remaining amount information in this embodiment will be described.

[0049] In this embodiment, the second remaining amount information includes a plurality of display forms. The plurality of display forms include a first display form and a second display form. The first display form is an icon imitating the shape of a battery as exemplified in Figs. 4(a1), (b1), and (c1). The second display form is the remaining operation time of the imaging device 100 as exemplified in Figs. 4(a2), (b2), and (c2).

[0050] The first display form is displayed in different forms based on the reliability of the first remaining amount information. In the example of FIG. 4, the different forms are the fineness (granularity) of the icon pattern, but may also be forms with different gradations, colors, etc. In the example of FIG. 4, the finer the icon pattern is in the order of (a1), (b1), and (c1) in FIG. 4, the higher the reliability of the first remaining amount information and the more accurate the second remaining amount information. Conversely, the coarser the icon pattern is, the lower the reliability of the first remaining amount information and the more inaccurate the second remaining amount information.

[0051] The second display form increases or decreases the minimum unit time of the operable time based on the reliability of the first remaining amount information. In the example of FIG. 4, the minimum unit time is a unit time representing the operable time, but may be information indicating other time divisions. The shorter the minimum display unit, the higher the reliability of the first remaining amount information and the more accurate the operable time. Conversely, the longer the minimum unit time, the lower the reliability of the first remaining amount information and the more inaccurate the operable time. In the example of FIG. 4, when the minimum display unit in FIG. 4(a2) is 1 minute, the reliability of the first remaining amount information is the highest and the operable time is also the most accurate, and when the minimum display unit in FIG. 4(c2) is 10 minutes, the reliability of the first remaining amount information is the lowest and the more inaccurate the operable time. Furthermore, when the minimum unit time in Figure 4(b2) is 5 minutes, the reliability of the first remaining amount information is higher and the operating time is more accurate than when the minimum display unit is 10 minutes in Figure 4(c2), but this means that the reliability of the first remaining amount information is lower and the operating time is less accurate than when the minimum display unit is 1 minute in Figure 4(a2).

[0052] In this way, the user can recognize the accuracy and reliability of the second remaining amount information in the second display form by looking at the first display form. Note that, although the example in Fig. 4 shows an example in which three types of levels can be set as the level of display accuracy, three or more types of levels may be set.

[0053] Next, the display control process performed by the imaging device 100 will be described with reference to FIG.

[0054] 5 is realized by the control unit 101 executing a program stored in the non-volatile memory 103 to function as the display control unit 300 and control each component of the imaging device 100. The control unit 101 starts the process when the imaging device 100 is connected to the power supply device 200 and the power is turned on to start up the system.

[0055] In step S501 , the serial communication unit 301 starts communication with the power supply equipment 200 via the CC communication interface circuit 203 .

[0056] In step S502, communication standard determination unit 302 determines version information of the standard of the communication started in step S501, and determines the reliability of the first remaining amount information acquired from power supply device 200 based on the determination result. Communication standard determination unit 302 determines that the newer the version information of the communication standard, the higher the reliability of the first remaining amount information, for example, by referring to a table for evaluating the reliability of the first remaining amount information for each revision of the communication standard stored in non-volatile memory 103.

[0057] In step S503, based on the reliability of the first remaining amount information determined in step S502, display accuracy switching unit 303 sets the display accuracy of the second remaining amount information generated by display data generating unit 305. Based on the reliability of the first remaining amount information determined in step S502, display accuracy switching unit 303 sets the display accuracy of the second remaining amount information to the first display form and the second display form exemplified in FIG.

[0058] In step S504 , the remaining amount information calculation unit 304 acquires the first remaining amount information from the power supply equipment 200 via the serial communication unit 301 .

[0059] In step S505, the remaining amount information calculation unit 304 calculates second remaining amount information based on the first remaining amount information acquired from the power supply equipment 200 in step S504.

[0060] In step S506, the display data generating unit 305 generates display data based on the second remaining amount information calculated in step S505, and displays the generated display data on the display unit 105.

[0061] In step S507, the control unit 101 determines whether to continue communication with the power supply device 200, and if it is determined that the communication is to be continued, the process returns to step S504, and if it is determined that the communication is not to be continued, the process ends. For example, the control unit 101 stops communication when the power supply of the imaging device 100 is turned off or when removal of the USB cable is detected, and otherwise determines to continue communication.

[0062] As described above, according to the present embodiment, the reliability of the first remaining amount information acquired from the power supply device 200 is determined according to the revision of the communication standard between the imaging device 100 and the power supply device 200, and the display accuracy of the second remaining amount information in the imaging device 100 is switched according to the determination result. This allows the user to recognize the difference in reliability between the first remaining amount information acquired from the power supply device and the second remaining amount information calculated from the first remaining amount information, and to make appropriate preparations, thereby reducing the situation in which operation is unintentionally restricted.

[0063] The version of the communication standard in step S502 in FIG. 5 may be determined by referring to a unique bit that indicates the revision of the communication standard, or may be determined from the storage format of the first remaining amount information or a corresponding command.

[0064] In addition, the reliability of the first remaining information in step S502 in the figure and the display accuracy of the second remaining information in step S502 may be determined based on the release date of the revision of the communication standard, or whether it is a revision of a specific communication standard, and then determined and set based on the results of that determination.

[0065] Furthermore, the user may be able to select via the operation unit 104 whether or not to calculate and display the second remaining amount information in steps S505 and S506 in FIG.

[0066] In addition, the calculation and display of the second remaining information in steps S505 and S506 of FIG. 5 may be performed only for the first remaining information obtained via a general-purpose interface such as USB, and not for the remaining information of battery 120 connected via a dedicated interface. [Other embodiments] The present invention can also be realized by a process in which a program for implementing one or more of the functions of the above-described embodiments is supplied to a system or device via a network or a storage medium, and one or more processors in a computer of the system or device read and execute the program. The present invention can also be realized by a circuit (e.g., ASIC) that implements one or more of the functions.

[0067] The invention is not limited to the above-described embodiments, and various modifications and variations are possible without departing from the spirit and scope of the invention. Accordingly, the following claims are appended to apprise the public of the scope of the invention.

[0068] The disclosure of this specification includes the following electronic device, control method, and program. [Configuration 1] An electronic device that operates using power received from a power supply device, A connection means for connecting to the power supply device; and a control means for acquiring first remaining amount information relating to the power that can be supplied from the power supply device, and calculating and displaying second remaining amount information relating to the power that allows the electronic device to operate based on the first remaining amount information, The electronic device is characterized in that the control means switches display accuracy of the second remaining amount information based on reliability of the first remaining amount information acquired from the power supply device. [Configuration 2] 2. The electronic device according to configuration 1, further comprising a display means for displaying the second remaining amount information. [Configuration 3] 3. The electronic device according to configuration 1 or 2, wherein the control means determines reliability of the first remaining amount information based on a revision of a communication standard for communicating with the power supply device via the connection means. [Configuration 4] 4. The electronic device according to configuration 3, wherein the revision of the communication standard is determined based on version information of the communication standard. [Configuration 5] 4. The electronic device according to configuration 3, wherein the revision of the communication standard is determined by data representing the revision of the communication standard. [Configuration 6] 4. The electronic device according to configuration 3, wherein the revision of the communication standard is determined from a storage format of the first remaining capacity information. [Configuration 7] 5. The electronic device according to configuration 4, wherein the control means determines that the reliability of the first remaining capacity information is higher as the version information of the communication standard is newer. [Configuration 8] 6. The electronic device according to configuration 5, wherein the control means increases the display accuracy as the reliability of the first remaining amount information increases. [Configuration 9] 9. The electronic device according to any one of configurations 1 to 8, wherein the second remaining capacity information includes an operable time of the electronic device calculated based on the first remaining capacity information. [Configuration 10] the first remaining amount information is remaining amount information of a battery included in the power supply device, the connection means is a general-purpose interface, 10. The electronic device according to any one of configurations 1 to 9, wherein the control means does not calculate and display the second remaining capacity information based on remaining capacity information of a battery connected via a dedicated interface. [Configuration 11] The general-purpose interface complies with the USB Type-C standard. 11. The electronic device according to configuration 10, wherein communication with the power supply device is CC communication of the USB PD standard. [Configuration 12] A method for controlling an electronic device that has a connection means for connecting to a power supply device and operates using power received from the power supply device, comprising: acquiring first remaining amount information on the power that can be supplied from the power supply device, and calculating and displaying second remaining amount information on the power that enables the electronic device to operate based on the first remaining amount information; A control method, wherein in the step, display accuracy of the second remaining amount information is switched based on reliability of the first remaining amount information acquired from the power supply device. [Configuration 13] A program for causing a computer to function as an electronic device according to any one of claims 1 to 11. [Explanation of symbols]

[0069] 100: imaging device, 101: control unit, 107: connection unit, 200: power supply device, 214: battery

Claims

1. An electronic device that operates using power received from a power supply device, A connection means for connecting to the power supply device; and a control means for acquiring first remaining amount information relating to the power that can be supplied from the power supply device, and calculating and displaying second remaining amount information relating to the power that allows the electronic device to operate based on the first remaining amount information, The electronic device according to claim 1, wherein the control means switches display accuracy of the second remaining amount information based on reliability of the first remaining amount information acquired from the power supply device.

2. 2. The electronic device according to claim 1, further comprising a display unit for displaying the second remaining amount information.

3. The electronic device according to claim 1 , wherein the control unit determines the reliability of the first remaining amount information based on a revision of a communication standard for communicating with the power supply device via the connection unit.

4. 4. The electronic device according to claim 3, wherein the revision of the communication standard is determined based on version information of the communication standard.

5. 4. The electronic device according to claim 3, wherein the revision of the communication standard is determined by data representing the revision of the communication standard.

6. 4. The electronic device according to claim 3, wherein the revision of the communication standard is determined from a storage format of the first remaining capacity information.

7. 5. The electronic device according to claim 4, wherein the control unit determines that the reliability of the first remaining capacity information is higher as the version information of the communication standard is newer.

8. 6. The electronic device according to claim 5, wherein the control unit increases the display accuracy as the reliability of the first remaining amount information increases.

9. The electronic device according to claim 1 , wherein the second remaining capacity information includes an operable time of the electronic device calculated based on the first remaining capacity information.

10. the first remaining amount information is remaining amount information of a battery included in the power supply device, the connection means is a general-purpose interface, 2. The electronic device according to claim 1, wherein the control means does not calculate and display the second remaining capacity information based on remaining capacity information of a battery connected through a dedicated interface.

11. The general-purpose interface complies with the USB Type-C standard. The electronic device according to claim 10 , wherein the communication with the power supply device is CC communication of the USB PD standard.

12. A method for controlling an electronic device that has a connection means for connecting to a power supply device and operates using power received from the power supply device, comprising: A method for calculating and displaying a power remaining amount of the electronic device, comprising: acquiring first remaining amount information related to power that can be supplied from the power supply device; and calculating and displaying second remaining amount information related to the power that can be operated by the electronic device based on the first remaining amount information; A control method, wherein in the step, display accuracy of the second remaining amount information is switched based on reliability of the first remaining amount information acquired from the power supply equipment.

13. A program for causing a computer to function as the electronic device according to any one of claims 1 to 11.

Images