Power receiving apparatus, control method, and storage medium

Abstract

A power receiving apparatus, a control method, and a storage medium are disclosed. The power receiving apparatus includes a determination unit and a display unit. The determination unit determines whether each of a power transmission apparatus and a cable connected to the power receiving apparatus satisfies a predetermined condition related to power transmission safety. The display unit displays first information indicating that the power transmission apparatus does not satisfy the predetermined condition in a case where the power transmission apparatus does not satisfy the predetermined condition. The display unit displays second information indicating that the cable does not satisfy the predetermined condition in a case where the cable does not satisfy the predetermined condition.

Description

Technical Field

[0001] This invention relates to a power receiving device, a control method for the power receiving device, and a storage medium. Background Technology

[0002] For wired interfaces used for communication with electronic devices such as digital cameras, there exists a technology that can transmit power while transmitting data. The USB (Universal Serial Bus) standard can serve as a standard for defining this technology.

[0003] Furthermore, the USB PD (Power Delivery) standard enables power receiving devices to connect to power delivery devices such as USB host controllers or AC adapters via USB cables, allowing power delivery devices to supply up to 100W of power to the power receiving device. When a power delivery device and a power receiving device that support the USB PD standard are connected, power negotiation communication is performed. This communication enables the exchange of power information between the devices, allowing the power delivery device to supply the power requested by the power receiving device.

[0004] Incidentally, it is known that there are power delivery devices, power receivers, and cables that have a USB standard interface but do not properly support the USB standard. For devices and cables that do not properly support the USB standard, it cannot be guaranteed that the operation and protection functions related to power delivery comply with the standard. Therefore, when using such devices and cables to transmit large amounts of power, safety may not be guaranteed.

[0005] The USB PD standard defines secure communication (C-AUTH authentication communication), in which, after negotiation, the power delivery device and the power receiver exchange authentication information to confirm whether the devices properly support the USB standard. The power receiver can also use C-AUTH authentication communication to confirm whether the cable properly supports the USB standard. Therefore, performing C-AUTH authentication communication before transmitting large amounts of power improves security.

[0006] Japanese Patent Application Publication No. 2015-39248 discloses a technology in which a power transmission device detects an increase in the supplied power, authenticates a connected power receiving device, and limits the power supply based on the authentication result.

[0007] There exist situations where, as a result of C-AUTH authentication communication performed by the power receiving device on the power transmitting device and cable, it is determined that at least one of the power transmitting device and cable does not properly support the USB standard. In this case, the power receiving device may behave differently than when the power transmitting device and cable properly support the USB standard (e.g., it may stop receiving power). However, it is not easy for the user to determine whether only the power transmitting device lacks proper support for the USB standard, only the cable, or both. The technology disclosed in Japanese Patent Application Publication No. 2015-39248 does not solve this problem. Summary of the Invention

[0008] According to various embodiments, users can know whether a power transmission device or cable meets predetermined safety-related conditions.

[0009] According to various embodiments, a power receiving device is provided, the power receiving device comprising: a determining unit that determines whether each of a power transmission device and a cable connected to the power receiving device meets predetermined conditions related to power transmission safety; and a display unit that displays first information indicating that the power transmission device does not meet the predetermined conditions when the power transmission device does not meet the predetermined conditions, and displays second information indicating that the cable does not meet the predetermined conditions when the cable does not meet the predetermined conditions.

[0010] According to various embodiments, a control method is provided, the method comprising: determining whether each of a power transmission device and a cable connected to the power receiving device meets predetermined conditions related to power transmission safety; if the power transmission device does not meet the predetermined conditions, displaying first information indicating that the power transmission device does not meet the predetermined conditions; and if the cable does not meet the predetermined conditions, displaying second information indicating that the cable does not meet the predetermined conditions.

[0011] According to various embodiments, a non-transitory storage medium is provided for storing a control method that enables a computer to perform a control method, the control method comprising: determining whether each of a power transmission device and a cable connected to the power receiving device meets predetermined conditions related to power transmission safety; displaying first information indicating that the power transmission device does not meet the predetermined conditions if the power transmission device does not meet the predetermined conditions; and displaying second information indicating that the cable does not meet the predetermined conditions if the cable does not meet the predetermined conditions.

[0012] Other features of the invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a diagram illustrating the system configuration according to the first embodiment.

[0014] Figure 2 This is a diagram showing the pin layout of connector 101.

[0015] Figure 3A This is a flowchart illustrating the power receiving control process performed by the power receiving device 100.

[0016] Figure 3B This is a flowchart illustrating the power receiving control process performed by the power receiving device 100.

[0017] Figure 3C This is a flowchart illustrating the power receiving control process performed by the power receiving device 100.

[0018] Figure 4 This is an example image showing the authentication status screen.

[0019] Figure 5 This is a display example diagram showing the authentication status of cable 122.

[0020] Figures 6A to 6C This is an example diagram illustrating the power receiving / charging status. Detailed Implementation

[0021] Exemplary embodiments, features, and aspects of this disclosure will now be described with reference to the accompanying drawings. However, aspects of this disclosure are not limited to the following embodiments. In the drawings, the same reference numerals are assigned to the same or similar configurations, and repeated descriptions thereof are omitted.

[0022] [First Embodiment] Figure 1 This is a diagram illustrating the system configuration according to the first embodiment. Figure 1 In this context, 120 represents a power transmission device. Here, power transmission device 120 is shown as an AC adapter that uses AC power as its power source. However, power transmission device 120 is not limited to an AC adapter and can be, for example, a personal computer (PC) including a USB connector, a portable battery, etc. 100 represents a power receiving device that receives power from power transmission device 120.

[0023] 122 indicates a cable. Cable 122 includes USB Type-C plugs at both ends and connects power delivery device 120 to power receiving device 100. Cable 122 contains a built-in eMarker, which electronically provides information about specifications, manufacturer, etc.

[0024] In the power receiving device 100, 101 represents a connector (a communication interface capable of receiving power based on a predetermined power transmission standard) for receiving power from the power transmission device 120, and is configured as a USB Type-C socket. Connector 101 is constructed as follows: Figure 2 The pin definitions shown include a VBUS terminal for power supply, a CC (configuration channel) terminal for obtaining information about the power supply capability of the power transmission device 120, and a GND terminal for signal reference.

[0025] 102 represents a pull-down resistor, which is connected between the CC and GND terminals of connector 101 and is defined by the USB Type-C standard. The pull-down resistor 102 is used by the power transmission device 120 to determine its connection with the power receiving device 100, and by the power receiving device 100 to determine the power supply capability of the power transmission device 120 by means of a voltage value, etc.

[0026] 103 represents the PD communication unit, which is connected to the CC terminal of connector 101 and performs communication based on the USB PD standard and determines whether the connected power transmission device 120 supports the USB PD standard.

[0027] When the power delivery device 120 is capable of USB PD communication, the power receiving device 100 uses the PD communication unit 103 to negotiate communication based on the communication protocol defined by the USB PD standard and requests the power delivery device 120 to supply the required power. The power receiving device 100 also uses the PD communication unit 103 to perform authentication communication based on the communication protocol defined by the USB PD standard and authenticates whether the power delivery device 120 is a device that properly supports the USB PD standard. In the first embodiment, the PD communication unit 103 has at least two requested power values ​​for requesting from the power delivery device 120. It is assumed that one of the two requested power values ​​is the minimum power required to perform the following operations: the power receiving device 100 can authenticate the power delivery device 120 as a device that properly supports the USB PD standard; and display operations can be performed in the display unit 106.

[0028] 104 represents a power receiving unit connected to the VBUS terminal of connector 101, which uses power supplied from power transmission device 120 to power each component of power receiving device 100. Power receiving unit 104 controls the power supplied from power transmission device 120 based on communication from PD communication unit 103.

[0029] 105 represents a load composed of various types of modules that operates by consuming power from the power receiving unit 104. The power consumed by the load 105 varies depending on the operating state of the power receiving device 100. The power receiving device 100 is, for example, a digital camera. In this case, the various types of modules constituting the load 105 include a camera lens for zooming and focusing on the image of the subject, an image sensor for converting the image of the subject into electronic image information, an operating unit including various types of switches, etc.

[0030] 106 represents a display unit that displays the current authentication result, etc. The display unit 106 is, for example, an LCD, an organic EL, or a reflective liquid crystal.

[0031] Figures 3A to 3C This is a flowchart illustrating the power receiving control process performed by the power receiving device 100. It begins when the power transmitting device 120 is connected to the power receiving device 100 via cable 122. Figures 3A to 3C The power receiving control process is shown in the flowchart.

[0032] In step S301, the PD communication unit 103 begins exchanging information with the power transmission device 120 based on the communication protocol of the USB PD standard.

[0033] In step S302, the PD communication unit 103 determines whether the power transmission device 120 supports the USB PD standard. Here, the PD communication unit 103 determines whether the connected power transmission device 120 supports the PD standard based on whether it has received predetermined information of the communication protocol based on the USB PD standard from the power transmission device 120. When the predetermined information of the communication protocol based on the USB PD standard cannot be received correctly, or when the predetermined information cannot be received within a predetermined time period, the communication unit 103 determines that the connected power transmission device 120 does not support the USB PD standard.

[0034] Here, "predetermined information" refers to power information indicating the power that the connected power transmission device 120 can supply. In the first embodiment, as an example, power information indicating that the power transmission device 120 can supply 0.5W (5V, 100mA), 15W (5V, 3A), and 27W (9V, 3A) power are received respectively. The predetermined period can be a time period defined in the USB PD standard, such as 310ms.

[0035] If it is determined in step S302 that the power delivery device 120 does not support the USB PD standard, the power reception control process proceeds to step S303. In step S303, the PD communication unit 103 stops communication processing. The PD communication unit 103 can also control the power receiving unit 104 to receive power supplies conforming to the USB Type-C standard. Then, the power reception control process shown in the flowcharts 3A to 3C ends.

[0036] On the other hand, if it is determined in step S302 that the power transmission device 120 supports the USB PD standard, the power reception control process proceeds to step S304. In step S304, the PD communication unit 103 exchanges information based on the communication protocol of the USB PD standard and requests the power transmission device 120 to supply a first power. Here, the "first power" can be the minimum power required for the power receiving device 100 to perform the authentication communication in step S306 and to display on the display unit 106. The first power is determined by selecting from the power information received in step S302 that indicates the power that the power transmission device 120 can supply. In the first embodiment, as an example, the PD communication unit 103 requests 0.5W (5V, 100mA) as the first power.

[0037] In step S305, based on the control of the PD communication unit 103, the power receiving unit 104 performs control such that the power to be supplied from the power transmission device 120 is no greater than a first power. In the first embodiment, the power receiving unit 104 controls the current value supplied from the power transmission device 120 to be no greater than 100mA. Furthermore, the power receiving unit 104 supplies power to each component in the power receiving device 100 such that the power receiving device 100 can perform at least the authentication communication in step S306 and the display in the display unit 106 using power no greater than the supplied first power. The load 105 can be set to a low-power operating state to prevent power shortage.

[0038] In step S306, the PD communication unit 103 performs processing to determine whether the power transmission device 120 and the cable 122 respectively meet predetermined conditions (safety conditions) related to power transmission safety. The safety conditions are not particularly limited and can be selected as appropriate based on the type of standard (power transmission standard) used for power transmission. In the example used to describe the first embodiment, the power transmission standard is the USB PD standard, and the safety conditions are reliability verification through C-AUTH certification and confirmation of passing compliance testing. However, as another example, the safety conditions could be conditions for reliability verification through C-AUTH certification (e.g., whether the compliance test passes or fails is irrelevant). The certification method used to verify reliability is not limited to C-AUTH certification, and certification methods according to any certification standard can be used, as long as their use is permitted by the power transmission standard used.

[0039] In the example of the first embodiment, in step S306, the PD communication unit 103 exchanges information based on the communication protocol of the USB PD standard and requests the power delivery device 120 to perform C-AUTH authentication. The PD communication unit 103 also obtains eMarker information from the cable 122 and also performs C-AUTH authentication on the cable 122.

[0040] In step S307, the PD communication unit 103 performs control to display the authentication status (“authenticating”) on the display unit 106. Figure 4 This is an example diagram showing the authentication status screen, and authentication status screen 401 is displayed in step S307. As shown in authentication status screen 401, both the USB cable (cable 122) and the USB-connected device (power delivery device 120) display a message indicating that the authentication status is "authenticating".

[0041] After C-AUTH certification is completed, in step S308, the PD communication unit 103 determines whether the reliability of the power transmission device 120 has been verified (whether the power transmission device 120 is reliable). If the power transmission device 120 is unreliable, the power reception control process proceeds to step S309, and if the power transmission device 120 is reliable, the power reception control process proceeds to step S311.

[0042] In step S309, the PD communication unit 103 controls the display unit 106 to display a screen indicating that the power transmission device 120 is unreliable.

[0043] In step S310, the PD communication unit 103 controls the display unit 106 to display information prompting the replacement of the power transmission device 120.

[0044] As a result of steps S309 and S310, the screen in display unit 106 moves from authentication status screen 401 to authentication status screen 402 (see...). Figure 4 ).

[0045] Note that in the example of authentication status screen 402, the message prompting to replace power transmission device 120 is read as "Please replace device," and does not include information indicating a candidate power transmission device to be used as a replacement. However, the PD communication unit 103 can be configured such that the message prompting to replace power transmission device 120 indicates a candidate power transmission device by, for example, displaying the model number of the candidate power transmission device. This also applies when the power reception control process proceeds from step S312 to step S310, as described later.

[0046] The power transmission device candidate is, for example, a power transmission device that has been pre-determined to meet the security conditions. In this case, the PD communication unit 103 stores the identification information of the power transmission device 120 when performing the processing of step S313 (described later) (e.g., when it is determined that the current power transmission device 120 meets the security conditions). Therefore, when the processing of step S310 is performed later with a different power transmission device, the PD communication unit 103 can identify the power transmission device that has been pre-determined to meet the security conditions. When the PD communication unit 103 stores the identification information of the power transmission device (e.g., when the power transmission device has been previously determined to meet the security conditions), the PD communication unit 103 can select the most recently determined power transmission device that meets the security conditions as a power transmission device candidate. Alternatively, the power transmission device candidate can be a power transmission device recommended by the manufacturer of the power receiving device 100. In this case, when manufacturing the power receiving device 100, when updating the firmware, etc., the manufacturer stores the identification information of the recommended power transmission device in the PD communication unit 103.

[0047] In step S311, the PD communication unit 103 determines whether the power delivery device 120 has passed the USB-IF (USB Users Forum) compliance test (compliance test for a predetermined power delivery standard). While there are no particular limitations on the determination method, it can be done, for example, by searching the list of compliant product identification information (XIDs) provided by the USB-IF for the power delivery device 120 obtained during the C-AUTH certification process. This also applies to the processing in step S317, described later. If the power delivery device 120 fails the compliance test, the power reception control process proceeds to step S312; if the power delivery device 120 passes the compliance test, the power reception control process proceeds to step S313.

[0048] In step S312, the PD communication unit 103 controls the display unit 106 to display a certification status screen indicating that the power transmission device 120 has failed the compliance test. Then, the PD communication unit 103 performs the processing of the aforementioned step S310 (displaying information prompting to replace the power transmission device 120).

[0049] As a result of steps S312 and S310, the screen in display unit 106 changes from authentication status screen 401 to authentication status screen 403 (see...). Figure 4 ).

[0050] Note that in Figure 4 The information displayed on the authentication status screen 402 is different from the information displayed on the authentication status screen 403. In other words, the above describes different (distinguished) information displayed when the power transmission device 120 is unreliable and when the power transmission device 120 fails the compliance test. Here, both instances of the information displayed in these two cases indicate that the power transmission device 120 does not meet the safety conditions. There are no particular limitations on the specific content of the information displayed to indicate that the power transmission device 120 does not meet the safety conditions. Therefore, the same information indicating that the power transmission device 120 does not meet the safety conditions can be displayed when the power transmission device 120 is unreliable (step S309) and when the power transmission device 120 fails the compliance test (step S312). This also applies to the information displayed later when the cable 122 is unreliable (step S315) and when the cable 122 fails the compliance test (step S318).

[0051] In step S313, the PD communication unit 103 controls the display unit 106 to display information indicating that the power transmission device 120 meets safety conditions (i.e., the power transmission device 120 has reliably passed the compliance test). Therefore, the screen on the display unit 106 moves from the authentication status screen 401 to the authentication status screen 404 (see...). Figure 4 ).

[0052] In step S314, the PD communication unit 103 determines whether the reliability of the cable 122 has been confirmed (whether the cable 122 is reliable). If the cable 122 is unreliable, the power reception control process proceeds to step S315, and if the cable 122 is reliable, the power reception control process proceeds to step S317.

[0053] In step S315, the PD communication unit 103 controls the display unit 106 to display a screen indicating that the cable 122 is unreliable.

[0054] In step S316, the PD communication unit 103 performs control so that the display unit 106 displays a message prompting the replacement of cable 122.

[0055] As a result of steps S315 and S316, the "USB cable" portion of the authentication status screen in the display unit 106 (authentication status screen 402, authentication status screen 403, or authentication status screen 404) is moved to a position where... Figure 5 The state indicated by reference numeral 501 in the attached figure.

[0056] Note that, with Figure 5 Taking the illustrated reference numeral 501 as an example, the message prompting to replace cable 122 is text read as "Please replace the cable," and does not contain information indicating cable candidates to be used as replacements. However, the PD communication unit 103 can be configured such that the message prompting to replace cable 122 indicates the cable candidate by, for example, displaying the cable candidate's model number. This also applies when the power reception control process proceeds from step S318 to step S316, as described later.

[0057] Candidate cables are, for example, cables that have been pre-determined to meet safety conditions. In this case, the PD communication unit 103 stores the identification information of cable 122 when performing the processing of step S319 (e.g., when it is determined that the current cable 122 meets the safety conditions). Therefore, when the processing of step S316 is performed later with a different cable, the PD communication unit 103 can identify the cable that has been pre-determined to meet the safety conditions. When the PD communication unit 103 stores the identification information of the cable (e.g., when the cable has been pre-determined to meet the safety conditions), the PD communication unit 103 can select the most recently determined cable that meets the safety conditions as a candidate cable. Alternatively, the candidate cable can be a cable recommended by the manufacturer of the power receiving device 100. In this case, when manufacturing the power receiving device 100, when updating the firmware, etc., the manufacturer can store the identification information of the recommended cable in the PD communication unit 103.

[0058] In step S317, the PD communication unit 103 determines whether the cable 122 has passed the compliance test. If the cable 122 fails the compliance test, the power receiving control process proceeds to step S318; if the cable 122 passes the compliance test, the power receiving control process proceeds to step S319.

[0059] In step S318, the PD communication unit 103 controls the display unit 106 to show a certification status screen indicating that cable 122 has failed the compliance test. Then, the PD communication unit 103 performs the processing described in step S316 above (displaying a prompt to replace cable 122).

[0060] As a result of steps S318 and S316, the "USB cable" portion of the authentication status screen in the display unit 106 (authentication status screen 402, authentication status screen 403, or authentication status screen 404) is moved to a position where... Figure 5 The state indicated by reference numeral 502 in the attached figure.

[0061] In step S319, the PD communication unit 103 performs control to display information on the display unit 106 indicating that the cable 122 meets safety conditions (the cable 122 is reliable and has passed the compliance test). Therefore, the "USB cable" section of the authentication status screen in the display unit 106 (authentication status screen 402, authentication status screen 403, or authentication status screen 404) moves to the location indicated by the authenticator. Figure 5 The state indicated by reference numeral 503 in the attached figure.

[0062] In step S320, the PD communication unit 103 determines whether the power transmission device 120 meets the safety conditions. If the power transmission device 120 does not meet the safety conditions, the power receiving control process proceeds to step S321; if the power transmission device 120 meets the safety conditions, the power receiving control process proceeds to step S323.

[0063] In step S321, the PD communication unit 103 stops PD communication and further stops power reception. In step S322, the PD communication unit 103 performs control to display a power reception / charging stop status (indicating the cessation of power reception and charging) on ​​the display unit 106.

[0064] Figure 6A This is a diagram illustrating an example of a power receiving / charging stop state. (See below) Figure 6B and Figure 6C The difference lies in Figure 6A In the icon area 601, the plug and battery icons displayed do not have icons indicating current.

[0065] In step S323, the PD communication unit 103 determines whether the cable 122 meets the safety conditions. If the cable 122 meets the safety conditions, the power receiving control process proceeds to step S324; otherwise, if the cable 122 does not meet the safety conditions, the power receiving control process proceeds to step S327.

[0066] In step S324, the PD communication unit 103 requests a second power from the power transmission device 120. The "second power" refers to the power available when the power transmitted from the power transmission device 120 is unrestricted (a power greater than the first power, as described in step S304). In step S325, based on the control of the PD communication unit 103, the power receiving unit 104 performs control such that the power to be supplied from the power transmission device 120 is no greater than the second power. In step S326, the PD communication unit 103 controls the display unit 106 to display a high power receiving / charging status (indicating that power receiving and charging are being performed at a high power level).

[0067] Figure 6B This is a diagram illustrating an example of a high power reception / charging status display. (See below for further details.) Figure 6C In comparison, Figure 6B In the middle, the size of the icon indicating the current provided for the plug and battery icons displayed in icon area 602 is relatively large.

[0068] In step S327, the PD communication unit 103 requests a third power from the power transmission device 120. The "third power" refers to the power when the power transmitted from the power transmission device 120 is limited (less than the second power described in step S324). When the cable 122 does not meet safety conditions, the PD communication unit 103 increases safety by limiting the received power. The third power can be the same as, greater than, or less than the first power described in step S304. In step S328, based on the control of the PD communication unit 103, the power receiving unit 104 performs control such that the power to be supplied from the power transmission device 120 is no greater than the third power. In step S329, the PD communication unit 103 controls the display unit 106 to display a power reception / charging limited status (indicating information that power reception and charging are limited).

[0069] Figure 6C This is a diagram illustrating an example of a power reception / charging limitation status. (As mentioned above...) Figure 6B In comparison, Figure 6C In the diagram, the icons indicating current for the plug and battery icons displayed in icon area 603 are smaller in size.

[0070] In step S330, the PD communication unit 103 waits until... Figure 6A , Figure 6B or Figure 6C After a predetermined time period elapses following the start of the display, the power reception control process proceeds to step S331. In step S331, the PD communication unit 103 controls the display of the authentication status on the display unit 106 to end. Please note that... Figures 3A to 3CThis is an example. There are no restrictions on the order of the steps in the flowchart; the order can be changed.

[0071] like Figures 6A to 6C As shown, according to the first embodiment, the authentication status of the power transmission device 120 and the cable 122 is displayed simultaneously with the power receiving / charging status. Furthermore, as... Figure 6A and Figure 6C As shown, when power reception / charging is stopped or limited, information indicating how to resolve the problem (replacing the power transmission device 120 or cable 122) is displayed. This makes it easy for the user to understand the situation and improves convenience.

[0072] As described above, according to the first embodiment, the power receiving device 100 determines whether the power transmission device 120 and the cable 122 respectively meet safety conditions (predetermined conditions related to power transmission safety). If the power transmission device 120 does not meet the safety conditions, the power receiving device 100 displays information indicating that the power transmission device 120 does not meet the safety conditions. Additionally, if the cable 122 does not meet the safety conditions, the power receiving device 100 displays information indicating that the cable 122 does not meet the safety conditions. Therefore, the first embodiment makes it easy for the user to determine when only the power transmission device 120 does not meet the safety conditions, when only the cable 122 does not meet the safety conditions, and when neither the power transmission device 120 nor the cable 122 meets the safety conditions.

[0073] [Second Embodiment] At least one of the various functions, processes, and methods described in the foregoing embodiments can be implemented using a program. In the following second embodiment, the program used to implement at least one of the various functions, processes, and methods described in the foregoing embodiments will be referred to as "program X". Furthermore, in the second embodiment, the computer used to execute program X will be referred to as "computer Y". Personal computers, microcomputers, CPUs (central processing units), etc., are examples of computer Y.

[0074] At least one of the various functions, processes, and methods described in the above embodiments can be implemented by computer Y executing program X. In this case, program X is provided to computer Y through a computer-readable storage medium. The computer-readable storage medium in the second embodiment includes at least one of a hard disk device, magnetic storage device, optical storage device, magneto-optical storage device, memory card, ROM, RAM, etc. Furthermore, the computer-readable storage medium in the second embodiment is a non-transitory storage medium.

[0075] Other embodiments

[0076] The embodiments of the present invention can also be implemented by providing software (programs) that perform the functions of the above embodiments to a system or device via a network or various storage media, and the computer or central processing unit (CPU) or microprocessor unit (MPU) of the system or device reads out and executes the program.

[0077] While the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the claims should be interpreted as broadly as possible to encompass all such variations and equivalent structures and functions.

Claims

1. A power receiving device, the power receiving device comprising: Connector for connecting cables; A power receiving unit that receives power supplied from the power transmission device via the cable; A determining unit that determines whether each of the power transmission device and the cable connected to the power receiving device meets predetermined conditions related to power transmission safety. A power request unit that, when both the power transmission device and the cable meet predetermined conditions, requests a second power from the power transmission device when the power transmission is unrestricted, and requests a third power from the power transmission device when the power transmission device meets predetermined conditions but the cable does not meet predetermined conditions, wherein the third power is lower than the second power. as well as The display unit displays first information indicating that the power transmission device does not meet predetermined conditions when the power transmission device does not meet predetermined conditions, and displays second information indicating that the cable does not meet predetermined conditions when the cable does not meet predetermined conditions. The display unit also displays an icon indicating a large power receiving / charging status when the power request unit requests unrestricted power from the power transmission device (a second power requirement), and displays an icon indicating a power receiving / charging restriction status with the second information when the power request unit requests restricted power from the power transmission device (a third power requirement).

2. The power receiving device according to claim 1, wherein, The determining unit performs the following: The reliability of each of the power transmission device and the cable is determined based on predetermined certification standards. If the power transmission device is unreliable, it is determined that the power transmission device does not meet the predetermined conditions; as well as If the cable is unreliable, it is determined that the cable does not meet the predetermined conditions.

3. The power receiving device according to claim 2, wherein, The determining unit performs the following: If the power transmission device is reliable, determine whether the power transmission device has passed the compliance test; If the cable is reliable, determine whether the cable has passed the compliance test; If the power transmission device is reliable but fails the compliance test, it is determined that the power transmission device does not meet the predetermined conditions; If the power transmission device is reliable and has passed the compliance test, it is determined that the power transmission device meets the predetermined conditions. If the cable is reliable but fails the compliance test, it is determined that the cable does not meet the predetermined conditions; as well as If the cable is reliable and has passed the compliance test, it is determined that the cable meets the predetermined conditions.

4. The power receiving device according to claim 3, wherein, The first information is used to distinguish between a situation where the power transmission device is reliable but fails the compliance test and a situation where the power transmission device is unreliable. The second information is used to distinguish between cases where the cable is reliable but fails the compliance test and cases where the cable is unreliable.

5. The power receiving device according to claim 1, wherein, The first information includes a prompt to replace the power transmission device, and The second information includes a prompt to replace the cable.

6. The power receiving device according to claim 5, wherein, The information prompting for replacement of power transmission equipment is used to indicate candidates for power transmission equipment, and The information prompting you to replace the cable is used to indicate alternative cables.

7. The power receiving device according to claim 6, wherein, The candidate power transmission device is a power transmission device that meets predetermined conditions and is predetermined by the determining unit. The cable candidates are cables that meet predetermined conditions and are pre-determined by the determining unit.

8. The power receiving device according to claim 7, wherein, If the determining unit has previously determined that the power transmission device meets predetermined conditions, the candidate power transmission device is the power transmission device that the determining unit most recently determined to meet the predetermined conditions. If the determining unit has previously determined that the cable meets predetermined conditions, the cable candidate is the cable that most recently met the predetermined conditions and was determined by the determining unit.

9. The power receiving device according to claim 6, wherein the power transmitting device candidate is a predetermined power transmitting device recommended by the manufacturer of the power receiving device, and The cable candidate is a predetermined cable recommended by the manufacturer of the power receiving device.

10. The power receiving device according to claim 1, in, If the power receiving device fails to meet predetermined conditions, the power receiving unit stops receiving power supplied from the power transmission device via cable.

11. The power receiving device according to claim 1, wherein, When the power transmission device meets predetermined conditions, the display unit displays third information indicating that the power transmission device meets predetermined conditions, and when the cable meets predetermined conditions, it displays fourth information indicating that the cable meets predetermined conditions.

12. A control method for a power receiving device, the control method comprising: Receives power supplied from the power transmission device via cable; Determine whether each of the power transmission device and the cable connected to the power receiving device meets predetermined conditions related to power transmission safety; When both the power transmission device and the cable meet predetermined conditions, a second power is requested from the power transmission device when the power transmission is unrestricted; when the power transmission device meets predetermined conditions but the cable does not meet predetermined conditions, a third power is requested from the power transmission device when the power transmission is restricted, wherein the third power is lower than the second power. If the power transmission device does not meet the predetermined conditions, first information indicating that the power transmission device does not meet the predetermined conditions is displayed; if the cable does not meet the predetermined conditions, second information indicating that the cable does not meet the predetermined conditions is displayed. as well as When requesting a second power source from the power transmission device when the power transmission is unrestricted, an icon indicating a large power receiving / charging status is displayed. When requesting a third power source from the power transmission device when the power transmission is restricted, an icon indicating a power receiving / charging restriction status with the second information is displayed.

13. A non-transitory storage medium storing a program for causing a computer to execute a control method for a power receiving device, the control method comprising: Receives power supplied from the power transmission device via cable; Determine whether each of the power transmission device and the cable connected to the power receiving device meets predetermined conditions related to power transmission safety; When both the power transmission device and the cable meet predetermined conditions, a second power is requested from the power transmission device when the power transmission is unrestricted; when the power transmission device meets predetermined conditions but the cable does not meet predetermined conditions, a third power is requested from the power transmission device when the power transmission is restricted, wherein the third power is lower than the second power. If the power transmission device does not meet the predetermined conditions, first information indicating that the power transmission device does not meet the predetermined conditions is displayed; if the cable does not meet the predetermined conditions, second information indicating that the cable does not meet the predetermined conditions is displayed. as well as When requesting a second power source from the power transmission device when the power transmission is unrestricted, an icon indicating a large power receiving / charging status is displayed. When requesting a third power source from the power transmission device when the power transmission is restricted, an icon indicating a power receiving / charging restriction status with the second information is displayed.

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